File:  [LON-CAPA] / loncom / interface / courseprefs.pm
Revision 1.132: download - view: text, annotated - select for diffs
Fri Dec 20 00:24:38 2024 UTC (6 days, 5 hours ago) by raeburn
Branches: MAIN
CVS tags: version_2_12_X, HEAD
- Report OK when the PerlCleanupHandler has successfully finished execution.

# The LearningOnline Network with CAPA
# Handler to set configuration settings for a course
#
# $Id: courseprefs.pm,v 1.132 2024/12/20 00:24:38 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
# This file is part of the LearningOnline Network with CAPA (LON-CAPA).
#
# LON-CAPA is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# LON-CAPA is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with LON-CAPA; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA#
# /home/httpd/html/adm/gpl.txt
#
# http://www.lon-capa.org/
#
#
###############################################################
##############################################################

=pod

=head1 NAME

courseprefs- Handler to set/modify course configuration

=head1 SYNOPSIS

courseprefs provides an interface for setting general course configuration

=head1 DESCRIPTION

This module is used for configuration of a course

=head1 INTERNAL SUBROUTINES

=over

=item get_allitems()

=item print_config_box()

=item process_changes()

=item process_linkprot()

=item get_sec_str()

=item check_clone()

=item store_changes()

=item store_linkprot()

=item update_env()

=item display_disallowed()

=item get_course()

=item get_jscript()

=item cloners_javascript()

=item print_courseinfo()

=item new_cloners_dom_row()

=item can_modify_catsettings()

=item assign_course_categories()

=item print_localization()

=item get_lang_choices()

=item print_feedback()

=item user_table()

=item select_recipient()

=item select_sections()

=item print_discussion()

=item role_checkboxes()

=item print_classlists()

=item print_appearance()

=item print_grading()

=item print_printouts()

=item print_spreadsheet()

=item print_bridgetasks()

=item print_other()

=item get_other_items()

=item item_table_row_start()

=item item_table_row_end()

=item yesno_radio()

=item select_from_options()

=item make_item_rows()

Creates table used to display and set course configuration items.

Inputs: $cdom,$items,$ordered,$settings,$rowtotal,$crstype
where $cdom is course's domain, $items is HASH ref for current config
item, $ordered is ARRAY ref of items to include in row in 
display order, $settings is HASH ref of current values forrow,
$rowtotal is SCALAR ref used to accumulate row count, $crstype is    
course type.

Returns: $datatable
HTML mark-up of data table which accumulates individual rows.  

=item nothidepriv_row()

Creates row containing form elements used to display and set
whether Domain coordinators who are currently included in  
advanced course user .db file for a course are to be hidden (e.g.,
in syllabus, or from course user lists).

Inputs: $cdom,$item,$settings,$crstype,$noedit
where $cdom is course domain, item is nothideprivileged, $settings is
HASH ref of the current values for nothideprivileged, $crstype is 
course type (Course or Community). 

Return: $datatable
HTML mark-up for Privileged users (Domain Coordinators) in staff listing.

=item print_hdrfmt_row()

Creates row containing form elements used to display and set
substitution items and text to be used in the header included
on printouts.

Inputs: $item,$settings
where $item is print_header_format, and $settings is a HASH ref
of the current values stored for print_header_format.

Returns: $output
HTML mark-up containing Javascript functions: reOrder() and getIndexByName()
used to dynamically update position selectboxes, and HTML table elements
for the "Print header format" row.

=item position_selector()

Creates a select box which can be used to reorder substitutions
and text included in a printout header. 

Inputs: $pos,$num,$maxnum
where $pos is current position, $num is the unique identifier,
and $maxnum is the total number of items (both substitutions
and text in the printout header.

Returns: $output
HTML mark-up for the selectbox and a hidden form element containing 
the current position.   

=item substitution_selector()

Creates a combination of select box for choosing an item 
(student name, course ID or assignment note) to substitute, 
and a corresponding size limit in the header used for printouts.

Inputs: $num,$subst,$limit,$crstype
where $num is the unique identifier, $subst is the current 
substitution (n,c or a, for name, course or note respectively,
$limit is the current size limit (integer), and $crstype is
course type - course or community.

Returns: $output
HTML mark-up for selectbox and textbox (separate table cells).  

=item change_clone()

Modifies the list of courses a user can clone (stored
in the user's environment.db file), called when a
change is made to the list of users allowed to clone
a course.

Inputs: $action,$cloner
where $action is add or drop, and $cloner is identity of
user for whom cloning ability is to be changed in course.

Returns: nothing

=back

=cut


package Apache::courseprefs;

use strict;
use Apache::Constants qw(:common :http);
use Apache::lonnet;
use Apache::loncommon();
use Apache::lonhtmlcommon();
use Apache::lonconfigsettings;
use Apache::lonrelrequtils;
use Apache::lonparmset;
use Apache::courseclassifier;
use Apache::lonlocal;
use LONCAPA qw(:DEFAULT :match);
use Crypt::CBC;
use Time::HiRes qw( sleep );

my $registered_cleanup;
my $modified_courses;

sub handler {
    my $r=shift;
    if ($r->header_only) {
        &Apache::loncommon::content_type($r,'text/html');
        $r->send_http_header;
        return OK;
    }
    my $context = 'course';
    my $cid = $env{'request.course.id'};
    my ($cnum,$cdom,$chome) = &get_course($cid);
    my $crstype = &Apache::loncommon::course_type();
    my ($parm_permission,$allowed) = &get_permission($cid);
    my $navmap = Apache::lonnavmaps::navmap->new();
    if ($allowed && $navmap) {
        &Apache::loncommon::content_type($r,'text/html');
        $r->send_http_header;
    } else {
        if ($navmap) {
            if ($crstype eq 'Community') {
                $env{'user.error.msg'}=
                    "/adm/courseprefs:opa:0:0:Cannot modify community settings";
            } else {
                $env{'user.error.msg'}=
                    "/adm/courseprefs:opa:0:0:Cannot modify course settings";
            }
        } else {
            if ($crstype eq 'Community') {
                $env{'user.error.msg'}=
                    "/adm/courseprefs::0:1:Course environment gone, reinitialize the community";
            } else {
                $env{'user.error.msg'}=
                    "/adm/courseprefs::0:1:Course environment gone, reinitialize the course";

            }
        }
        return HTTP_NOT_ACCEPTABLE;
    }

    $registered_cleanup=0;
    @{$modified_courses}=();

    &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},
                                            ['phase','actions','origin']);
    &Apache::lonhtmlcommon::clear_breadcrumbs();
    if ($env{'form.origin'} eq 'params') {
        &Apache::lonhtmlcommon::add_breadcrumb({href=>"/adm/parmset",
                                                text=>"Parameter Manager"});
    }
    my ($brtext,$brtitle,$crsinfotext,$crsinfodesc,$crscateg,$crshide);
    my %lt;
    if ($crstype eq 'Community') {
        %lt = (
                conf => 'Community Settings',
                edit => 'Edit Community Settings',
                gens => 'General community settings',
                idnu => 'Community ID or number',
                unco => 'Unique code',
                desc => 'Community Description',
                ownr => 'Community Owner',
                cown => 'Community Co-owners',
                catg => 'Categorize community',
                excc => 'Exclude from community catalog',
                clon => 'Users allowed to clone community',
                rept => 'Replacement titles for standard community roles',
                time => 'Time Zone where the community is located',
                date => 'Locale used for community calendar',
                coco => 'Community Content',
                copo => 'Community Policy',
                priv => 'Domain Coordinators in community',
                defd => 'Default dates for member access',
                stuv => 'Member-viewable membership list options',
                stul => 'Member agreement needed to be listed',
                clas => 'Membership and facilitator listing',
                prus => 'Privileged users (Domain Coordinators) in facilitator listing',
                defc => 'Default Community Spreadsheet',
                defs => 'Default User Spreadsheet',
                seme => 'Send message to member when clicking Done on Tasks'
              );
    } else {
        %lt = (
                conf => 'Course Settings',
                edit => 'Edit Course Settings',
                gens => 'General course settings',
                idnu => 'Course ID or number',
                unco => 'Unique code',
                desc => 'Course Description',
                cred => 'Student credits',
                ownr => 'Course Owner',
                cown => 'Course Co-owners',
                catg => 'Categorize course',
                excc => 'Exclude from course catalog',
                clon => 'Users allowed to clone course',
                rept => 'Replacement titles for standard course roles',
                time => 'Time Zone in which the course takes place',
                date => 'Locale used for course calendar',
                coco => 'Course Content',
                copo => 'Course Policy',
                priv => 'Domain Coordinators in course',
                defd => 'Default dates for student access',
                stuv => 'Student-viewable classlist options',
                stul => 'Student agreement needed to be listed',
                clas => 'Classlists and staff listing',
                prus => 'Privileged users (Domain Coordinators) in staff listing',
                prdo => "Domains to check for privileged users (besides course's domain)",
                defc => 'Default Course Spreadsheet',
                defs => 'Default Student Spreadsheet',
                seme => 'Send message to student when clicking Done on Tasks',
              );
    }
    $lt{'lcrv'} = 'Required LON-CAPA version';
    &Apache::lonhtmlcommon::add_breadcrumb({href=>'/adm/courseprefs',
        text=>$lt{'conf'}});
    my $breadcrumbs =
        &Apache::lonhtmlcommon::breadcrumbs($lt{'edit'});

    my $phase = 'pickactions';
    if ( exists($env{'form.phase'}) ) {
        $phase = $env{'form.phase'};
    }

    if (($phase eq 'categorizecourse') && ($parm_permission->{'categorizecourse'})) {
        &assign_course_categories($r,$crstype);
        return OK;
    }

    if (($phase eq 'releaseinfo') && ($parm_permission->{'releaseinfo'})) {
        my $loncaparev = $env{'course.'.$cid.'.internal.releaserequired'};
        if ($loncaparev) { 
            if (&display_loncaparev_constraints($r,$navmap,$loncaparev,$crstype)) {
                push(@{$modified_courses},[$cdom,$cnum,$chome,$crstype]);
                unless ($registered_cleanup) {
                    my $handlers = $r->get_handlers('PerlCleanupHandler');
                    $r->set_handlers('PerlCleanupHandler' => [\&update_releasereq,@{$handlers}]);
                    $registered_cleanup=1;
                }
            }
            return OK;
        }
    }

    my %values=&Apache::lonnet::dump('environment',$cdom,$cnum);
    my %linkprot=&Apache::lonnet::dump('lti',$cdom,$cnum,undef,undef,undef,1);
    my %domdefs = &Apache::lonnet::get_domain_defaults($cdom);
    unless ($phase eq 'process') {
        if (ref($domdefs{'linkprotsuggested'}) eq 'HASH') {
            $values{'suggested'} = $domdefs{'linkprotsuggested'};
        }
    }
    my %ltienc = &Apache::lonnet::dump('nohist_ltienc',$cdom,$cnum,undef,undef,undef,1);
    my %ltitools = &Apache::lonnet::dump('ltitools',$cdom,$cnum,undef,undef,undef,1);
    my %ltitoolsenc = &Apache::lonnet::dump('nohist_toolsenc',$cdom,$cnum,undef,undef,undef,1);
    foreach my $id (keys(%linkprot)) {
        if (ref($linkprot{$id}) eq 'HASH') {
            if (ref($ltienc{$id}) eq 'HASH') {
                $values{'linkprot'}{$id} = { %{$linkprot{$id}}, %{$ltienc{$id}} };
            } else {
                $values{'linkprot'}{$id} = $linkprot{$id};
            }
        }
        unless ($phase eq 'process') {
            if (ref($values{'linkprot'}{$id}) eq 'HASH') {
                delete($values{'linkprot'}{$id}{'secret'});
            }
        }
    }
    if ($linkprot{'lock'}) {
        delete($linkprot{'lock'});
    }
    foreach my $id (keys(%ltitools)) {
        if (ref($ltitools{$id}) eq 'HASH') {
            if (ref($ltitoolsenc{$id}) eq 'HASH') {
                $values{'ltitools'}{$id} = { %{$ltitools{$id}}, %{$ltitoolsenc{$id}} };
            } else {
                $values{'ltitools'}{$id} = $ltitools{$id};
            }
        }
        unless ($phase eq 'process') {
            if (ref($values{'ltitools'}{$id}) eq 'HASH') {
                delete($values{'ltitools'}{$id}{'secret'});
            }
        }
    }
    if ($ltitools{'lock'}) {
        delete($ltitools{'lock'});
    }
    my @prefs_order = ('courseinfo','localization','feedback','discussion',
                       'classlists','appearance','grading','printouts',
                       'menuitems','ltitools','linkprot','spreadsheet',
                       'bridgetasks','lti','other');
    my %prefs = (
        'courseinfo' =>
                   { text => $lt{'gens'},
                     help => 'Course_Prefs_General',
                     ordered => ['owner','co-owners','loncaparev','description',
                                 'clonedfrom','courseid','uniquecode','categories',
                                 'hidefromcat','syllabus','cloners','url',
                                 'rolenames'],
                     itemtext => {
                                   'owner'            => $lt{'ownr'},
                                   'co-owners'        => $lt{'cown'},
                                   'description'      => $lt{'desc'},
                                   'courseid'         => $lt{'idnu'},
                                   'uniquecode'       => $lt{'unco'},
                                   'categories'       => $lt{'catg'},
                                   'hidefromcat'      => $lt{'excc'},
                                   'cloners'          => $lt{'clon'}, 
                                   'syllabus'         => 'Syllabus status',
                                   'url'              => 'Top Level Map',
                                   'rolenames'        => $lt{'rept'},
                                   'loncaparev'       => $lt{'lcrv'},
                                   'clonedfrom'       => 'Cloned from',
                                 },
                    },
        'localization' =>
                    { text => 'Language and time localization',
                      help => 'Course_Prefs_Language',
                      ordered => ['languages','timezone','datelocale'],
                      itemtext => {
                                    languages  => 'Languages used',
                                    timezone   => $lt{'time'}, 
                                    datelocale => $lt{'date'},
                                  },
                    },
        'feedback' =>
                    { text => 'Feedback messages',
                      help => 'Course_Prefs_Feedback',
                      header => [{col1 => 'Questions about:',
                                  col2 => 'Recipients'}],
                      ordered => ['question.email','comment.email','policy.email'],
                      itemtext => {
                                     'question.email' => 'Resource Content',
                                     'comment.email'  => $lt{'coco'},
                                     'policy.email'   => $lt{'copo'},
                                  },
                    },
        'discussion' =>
                    { text => 'Discussion and Chat',
                      help => 'Course_Prefs_Discussions',
                      ordered => ['pch.roles.denied','pch.users.denied',
                                  'pac.roles.denied','pac.users.denied',
                                  'plc.roles.denied','plc.users.denied',
                                  'allow_limited_html_in_feedback',
                                  'allow_discussion_post_editing',
                                  'discussion_post_fonts'],
                      itemtext => {
                         'pch.roles.denied'             => 'No Resource Discussion',
                         'pch.users.denied'             => 'No Resource Discussion',
                         'plc.roles.denied'             => 'No Chat room use',
                         'plc.users.denied'             => 'No Chat room use',
                         'pac.roles.denied'             => 'No Anonymous Resource Discussion',
                         'pac.users.denied'             => 'No Anonymous Resource Discussion',  
                         allow_limited_html_in_feedback => 'Allow limited HTML in discussion',
                         allow_discussion_post_editing  => 'Users can edit/delete own discussion posts',
                         discussion_post_fonts          => 'Discussion post fonts based on likes/unlikes',
                                  },
                    },
        'classlists' =>
                   { text => $lt{'clas'},
                     help => 'Course_Prefs_Classlists',
                     header => [{col1 => 'Type',
                                 col2 => $lt{'defd'}},
                                {col1 => 'Setting',
                                 col2 => $lt{'priv'}},
                                {col1 => 'Setting',
                                 col2 => $lt{'stuv'}}],
                     ordered => ['default_enrollment_start_date',
                                 'default_enrollment_end_date',
                                 'defaultcredits',
                                 'nothideprivileged','checkforpriv',
                                 'student_classlist_view',
                                 'student_classlist_opt_in','student_classlist_portfiles'],
                     itemtext => {
                         default_enrollment_start_date => 'Start date',
                         default_enrollment_end_date   => 'End date',
                         nothideprivileged             => $lt{'prus'},
                         checkforpriv                  => $lt{'prdo'},
                         student_classlist_view        => $lt{'stuv'},
                         student_classlist_opt_in      => $lt{'stul'},
                         student_classlist_portfiles   => 'Include link to accessible portfolio files',
                         defaultcredits                => $lt{'cred'},
                                  },
                   },
        'appearance' =>
                   { text => 'Display of resources ',
                     help => 'Course_Prefs_Display',
                     ordered => ['default_xml_style','pageseparators',
                                 'disable_receipt_display','texengine',
                                 'tthoptions','uselcmath','usejsme',
                                 'inline_chem','extresource'],
                      itemtext => {
                          default_xml_style       => 'Default XML style file',
                          pageseparators          => 'Visibly Separate Items on Pages',
                          disable_receipt_display => 'Disable display of problem receipts',
                          texengine               => 'Force use of a specific math rendering engine',
                          tthoptions              => 'Default set of options to pass to tth/m when converting TeX',
                          uselcmath               => 'Student formula entry uses inline preview, not DragMath pop-up',
                          usejsme                 => 'Molecule editor uses JSME (HTML5) in place of JME (Java)',
                          inline_chem             => 'Chemical reaction response uses inline preview, not pop-up',
                          extresource             => 'Display of external resources',
                                  },
                  },
        'grading' =>
                  { text => 'Grading',
                    help => 'Course_Prefs_Grading',
                    ordered => ['grading','rndseed',
                                'receiptalg','disablesigfigs'],
                    itemtext => {
                        grading        => 'Grading',
                        rndseed        => 'Randomization algorithm used',
                        receiptalg     => 'Receipt algorithm used',
                        disablesigfigs => 'Disable checking of Significant Figures',
                                },

                  },
        'printouts' =>
                  { text => 'Printout generation',
                    help => 'Course_Prefs_Printouts',
                    ordered => ['problem_stream_switch','suppress_tries',
                                'default_paper_size','print_header_format',
                                'disableexampointprint','canuse_pdfforms'],
                    itemtext => {
                        problem_stream_switch => 'Allow problems to be split over pages',
                        suppress_tries        => 'Suppress number of tries in printing',
                        default_paper_size    => 'Default paper type',
                        print_header_format   => 'Print header format',
                        disableexampointprint => 'Disable automatically printing point values on bubblesheet exams',
                        canuse_pdfforms    => 'Users can print problems as PDF forms and upload later for grading',
                                },
                  },
        'spreadsheet' =>
                  { text => 'Spreadsheets',
                    help => 'Course_Prefs_Spreadsheet',
                    ordered => ['spreadsheet_default_classcalc',
                                'spreadsheet_default_studentcalc',
                                'spreadsheet_default_assesscalc','hideemptyrows'],
                    itemtext => {
                                  spreadsheet_default_classcalc   => $lt{'defc'},
                                  spreadsheet_default_studentcalc => $lt{'defs'},
                                  spreadsheet_default_assesscalc  => 'Default Assessment Spreadsheet',
                                  hideemptyrows                   => 'Hide Empty Rows in Spreadsheets',
                                },
                  },
        'bridgetasks' =>
                  { text => 'Bridge tasks',
                    help => 'Course_Prefs_Bridgetasks',
                    ordered => ['task_messages','task_grading',
                                'suppress_embed_prompt'],
                    itemtext => {
                        task_messages         => $lt{'seme'},
                        task_grading          => 'Bridge Task grading by instructors and TAs in sections' ,
                        suppress_embed_prompt => 'Hide upload references prompt if uploading file to portfolio',
                                },
                  },
        'lti' =>
                  {
                    text => 'LTI provider settings',
                    help => 'Course_Prefs_LTIProvider',
                    ordered => ['lti.override','lti.topmenu','lti.inlinemenu','lti.lcmenu'],
                    itemtext => {
                         'lti.override'   => 'Override domain defaults',
                         'lti.topmenu'    => 'Display LON-CAPA page header',
                         'lti.inlinemenu' => 'Display LON-CAPA inline menu',
                         'lti.lcmenu'     => 'Menu items',
                                },
                  },
        'menuitems' =>
                   {
                     text => 'Menu display',
                     help => 'Course_Prefs_Menus',
                     header => [{col1 => 'Default Menu',
                                 col2 => 'Value',},
                                {col1 => 'Menu collections',
                                 col2 => 'Settings',
                                }],
                     ordered => ['menudefault','menucollections'],
                     itemtext => {
                         menudefault     => 'Choose default collection of menu items for course',
                         menucollections => 'Menu collections',
                                 },
                   },
        'linkprot' =>
                   {
                     text => 'Link protection',
                     help => 'Course_Prefs_Linkprotection',
                     header => [{col1 => 'Item',
                                 col2 => 'Settings',
                                }],
                   },
        'ltitools' =>
                   {
                     text => 'External tools',
                     help => 'Course_Prefs_ExternalTools',
                     header => [{col1 => 'Item',
                                 col2 => 'Settings',
                                }],
                   },
        'other' =>
                  { text => 'Other settings',
                    help => 'Course_Prefs_Other',
                    header => [ {col1 => 'Item',
                                 col2 => 'Value',
                              }],
                  },
    );
    if (($phase eq 'process') && ($parm_permission->{'process'})) {
        my @allitems = &get_allitems(%prefs);
        my $result = &Apache::lonconfigsettings::make_changes($r,$cdom,$phase,$context,
                                                              \@prefs_order,\%prefs,\%values,
                                                              $cnum,undef,\@allitems,
                                                              'coursepref',$parm_permission);
        if ((ref($result) eq 'HASH') && (keys(%{$result}))) {
            $r->rflush();
            &devalidate_remote_courseprefs($cdom,$cnum,$result);
        }
    } elsif (($phase eq 'display') && ($parm_permission->{'display'})) {
        my $noedit;
        if (ref($parm_permission) eq 'HASH') {
            unless ($parm_permission->{'process'}) {
                $noedit = 1;
            }
        }
        my $jscript = &get_jscript($cid,$cdom,$phase,$crstype,\%values,$noedit);
        my @allitems = &get_allitems(%prefs);
        &Apache::lonconfigsettings::display_settings($r,$cdom,$phase,$context,
            \@prefs_order,\%prefs,\%values,$cnum,$jscript,\@allitems,$crstype,
            'coursepref',$parm_permission);
    } else {
        &Apache::lonconfigsettings::display_choices($r,$phase,$context,
                                                    \@prefs_order,\%prefs,
                                                    'coursepref',$parm_permission);
    }
    return OK;
}

sub get_permission {
    my ($cid) = @_;
    my %permission;
    my $allowed = 0;
    return (\%permission,$allowed) unless ($cid);
    if (&Apache::lonnet::allowed('opa',$cid)) {
        %permission= (
                       'pickactions'      => 1,
                       'categorizecourse' => 1,
                       'releaseinfo'      => 1,
                       'process'          => 1,
                       'display'          => 1,
         );
    } elsif (&Apache::lonnet::allowed('vpa',$env{'request.course.id'})) {
        %permission = (
                       'pickactions'      => 1,
                       'releaseinfo'      => 1,
                       'display'          => 1,
                      );
    }
    foreach my $perm (values(%permission)) {
        if ($perm) { $allowed=1; last; }
    }
    return (\%permission,$allowed);
}

sub get_allitems {
    my (%prefs) = @_;
    my @allitems;
    foreach my $item (keys(%prefs)) {
        if (ref($prefs{$item}) eq 'HASH') {
            if (ref($prefs{$item}{'ordered'}) eq 'ARRAY') {
                push(@allitems,@{$prefs{$item}{'ordered'}});
                if ($item eq 'feedback') {
                    push(@allitems,(map { $_.'.text'; } @{$prefs{$item}{'ordered'}}));
                }
            } elsif (($item eq 'linkprot') || ($item eq 'ltitools')) {
                push(@allitems,$item);
            }
        }
    }
    return @allitems;
}

sub print_config_box {
    my ($r,$cdom,$cnum,$phase,$action,$item,$settings,$allitems,$crstype,$parm_permission) = @_;
    my $ordered = $item->{'ordered'};
    my $itemtext = $item->{'itemtext'};
    my $noedit;
    if (ref($parm_permission) eq 'HASH') {
        unless ($parm_permission->{'process'}) {
            $noedit = 1;
        }
    }
    my $rowtotal = 0;
    my $output =
         '<table class="LC_nested_outer">
          <tr>
           <th align="left" valign="middle"><span class="LC_nobreak" style="font-size: larger;" >'.
           &mt($item->{text});
    if ($item->{'help'}) {
        $output .= '&nbsp;'.
                   &Apache::loncommon::help_open_topic($item->{'help'});
    }
    $output .= '</span></th>'."\n".
               '</tr>';
    if (($action eq 'feedback') || ($action eq 'classlists') || ($action eq 'menuitems')) {
        $output .= '
          <tr>
           <td>
            <table class="LC_nested">';   
        if (exists $item->{'header'}->[0]->{'col1'} || 
            exists $item->{'header'}->[0]->{'col2'}) {
			$output .= '          
          	<tr class="LC_info_row">
              <td class="LC_left_item">'.&mt($item->{'header'}->[0]->{'col1'}).'</td>';
            if ($action eq 'feedback') {
                $output .= '
                  <td class="LC_right_item" colspan="2">';
            } else {
                $output .= '
                  <td class="LC_right_item">';
            }
            $output .= &mt($item->{'header'}->[0]->{'col2'}).'</td>
            </tr>';
        }
        $rowtotal ++;
        if ($action eq 'feedback') {
            $output .= &print_feedback('top',$cdom,$settings,$ordered,$itemtext,\$rowtotal,$noedit);
        } elsif ($action eq 'classlists') {
            $output .= &print_classlists('top',$cdom,$settings,$itemtext,\$rowtotal,$crstype,$noedit);
        } elsif ($action eq 'menuitems') {
            $output .= &print_menuitems('top',$cdom,$settings,$itemtext,\$rowtotal,$crstype,$noedit);
        }
        $output .= '
           </table>
          </td>
         </tr>
         <tr>
          <td>
            <table class="LC_nested">
             <tr class="LC_info_row">
              <td class="LC_left_item">'.&mt($item->{'header'}->[1]->{'col1'}).'</td>';
        if ($action eq 'classlists') {
            $output .= '
              <td class="LC_right_item" colspan="2">';
        } else {
            $output .= '
              <td class="LC_right_item">';
        }
        $output .= &mt($item->{'header'}->[1]->{'col2'}).'</td>
             </tr>';
        if ($action eq 'classlists') {
            $output .= &print_classlists('middle',$cdom,$settings,$itemtext,\$rowtotal,$crstype,$noedit).
                       '
            </table>
           </td>
          </tr>
          <tr>
           <td>
            <table class="LC_nested">';
            if (exists $item->{'header'}->[2]->{'col1'} || 
            	exists $item->{'header'}->[2]->{'col2'}) {
				$output .= '          
				<tr class="LC_info_row">
				  <td class="LC_left_item">'.&mt($item->{'header'}->[2]->{'col1'}).'</td>
				  <td class="LC_right_item">'.&mt($item->{'header'}->[2]->{'col2'}).'</td>
				</tr>';
        	}
        }
    } else {
        $output .= '
          <tr>
           <td>
            <table class="LC_nested">';
        if ($action eq 'linkprot') {
            if ((ref($settings) eq 'HASH') && (ref($settings->{'suggested'}) eq 'HASH')) {
                my $hints;
                my $hintcount = 0;
                foreach my $key (sort { $a <=> $b } keys(%{$settings->{'suggested'}})) {
                    if ((ref($settings->{'suggested'}->{$key}) eq 'HASH')) {
                        if (($settings->{'suggested'}->{$key}-{'name'} ne '') &&
                            ($settings->{'suggested'}->{$key}-{'info'} ne '')) {
                            my $css_class = $hintcount%2?' class="LC_odd_row"':' class="LC_even_row"';
                            $hints .= '<tr '.$css_class.'><td class="LC_left_item">'.
                                      $settings->{'suggested'}->{$key}->{'name'}.'</td>'.
                                      '<td class="LC_right_item"><pre>'.
                                      $settings->{'suggested'}->{$key}->{'info'}.
                                      '</pre></td></tr>';
                            $hintcount ++;
                        }
                    }
                }
                if ($hintcount) {
                    $output .= '<tr class="LC_info_row">'.
                               '<td colspan="2" class="LC_left_item">'.&mt('Recommendation(s) for specific launcher application(s)').'</td>'.
                               '</tr>'."\n".
                               '<tr class="LC_info_row">'.
                               '<td class="LC_left_item"><span class="LC_nobreak">'.&mt('Launcher Application').'</span></td>'.
                               '<td class="LC_right_item">'.&mt('Recommendation(s)').'</td></tr>'."\n".
                               $hints;
                }
            }
        }
        if (exists $item->{'header'}->[0]->{'col1'} || 
            exists $item->{'header'}->[0]->{'col2'}) {
	    $output .= '          
          	<tr class="LC_info_row">
              <td class="LC_left_item" valign="top">'.&mt($item->{'header'}->[0]->{'col1'}).'</td>';
            if (($action eq 'courseinfo') || ($action eq 'localization') ||
                ($action eq 'print_discussion')) {
                $output .= '<td class="LC_right_item" valign="top" colspan="2">';
            } else {
                $output .= '<td class="LC_right_item" valign="top">';
            }
            $output .= &mt($item->{'header'}->[0]->{'col2'}).'</td>
            </tr>';
        }
    }
    $rowtotal ++;
    if ($action eq 'courseinfo') {
        $output .= &print_courseinfo($cdom,$settings,$ordered,$itemtext,\$rowtotal,$crstype,$noedit);
    } elsif ($action eq 'localization') {
        $output .= &print_localization($cdom,$settings,$ordered,$itemtext,\$rowtotal,$noedit);
    } elsif ($action eq 'feedback') {
        $output .= &print_feedback('bottom',$cdom,$settings,$ordered,$itemtext,\$rowtotal,$noedit);
    } elsif ($action eq 'discussion') {
        $output .= &print_discussion($cdom,$settings,$ordered,$itemtext,\$rowtotal,$noedit);
    } elsif (($action eq 'classlists') || ($action eq 'viewableroster')) {
        $output .= &print_classlists('bottom',$cdom,$settings,$itemtext,\$rowtotal,$crstype,$noedit);
    } elsif ($action eq 'appearance') {
        $output .= &print_appearance($cdom,$settings,$ordered,$itemtext,\$rowtotal,$crstype,$noedit);
    } elsif ($action eq 'grading') {
        $output .= &print_grading($cdom,$cnum,$settings,$ordered,$itemtext,\$rowtotal,$crstype,$noedit);
    } elsif ($action eq 'printouts') {
        $output .= &print_printouts($cdom,$settings,$ordered,$itemtext,\$rowtotal,$crstype,$noedit);
    } elsif ($action eq 'spreadsheet') {
        $output .= &print_spreadsheet($cdom,$settings,$ordered,$itemtext,\$rowtotal,$crstype,$noedit);
    } elsif ($action eq 'bridgetasks') {
        $output .= &print_bridgetasks($cdom,$settings,$ordered,$itemtext,\$rowtotal,$crstype,$noedit);
    } elsif ($action eq 'ltitools') {
        my $currtools = {};
        if ((ref($settings) eq 'HASH') && (ref($settings->{'ltitools'}))) {
            $currtools = $settings->{'ltitools'};
        }
        $output .= &print_ltitools($cdom,$cnum,$currtools,\$rowtotal,$crstype,$noedit,'course');
    } elsif ($action eq 'lti') {
        $output .= &print_lti($cdom,$settings,$ordered,$itemtext,\$rowtotal,$crstype,$noedit);
    } elsif ($action eq 'menuitems') {
        $output .= &print_menuitems('bottom',$cdom,$settings,$itemtext,\$rowtotal,$crstype,$noedit);
    } elsif ($action eq 'linkprot') {
        $output .= &print_linkprotection($cdom,$cnum,$settings,\$rowtotal,$crstype,$noedit,'course');
    } elsif ($action eq 'other') {
        $output .= &print_other($cdom,$settings,$allitems,\$rowtotal,$crstype,$noedit);
    }
    $output .= '
   </table>
  </td>
 </tr>
</table><br />';
    return ($output,$rowtotal);
}

sub process_changes {
    my ($cdom,$cnum,$action,$values,$item,$changes,$allitems,$disallowed,$crstype,$lastactref) = @_;
    my (%newvalues,$errors);
    if (ref($item) eq 'HASH') {
        if (ref($changes) eq 'HASH') {
            my @ordered;
            if ($action eq 'other') {
                @ordered = &get_other_items($cdom,$values,$allitems);
                if ($env{'form.newp_name'} ne '') {
                    my $newp = $env{'form.newp_name'};
                    if ($env{'form.newp_value'} ne '') {
                        if (ref($allitems) eq 'ARRAY') {
                            unless ((grep(/^\Q$newp\E$/,@ordered)) || 
                                    (grep(/^\Q$newp\E$/,@{$allitems}))) {
                                $changes->{$newp} = $env{'form.newp_value'};
                            }
                        }
                    }
                }
            } elsif (($action eq 'linkprot') || ($action eq 'ltitools')) {
                if (ref($values->{$action}) eq 'HASH') {
                    foreach my $id (keys(%{$values->{$action}})) {
                        if ($id =~ /^\d+$/) {
                            push(@ordered,$id);
                        }
                    }
                }
                @ordered = sort { $a <=> $b } @ordered;
                if (($env{'form.'.$action.'_add'}) && ($env{'form.'.$action.'_maxnum'} =~ /^\d+$/)) {
                    push(@ordered,$env{'form.'.$action.'_maxnum'});
                }
            } elsif (ref($item->{'ordered'}) eq 'ARRAY') {
                if ($action eq 'courseinfo') {
                    my ($can_toggle_cat,$can_categorize) =
                        &can_modify_catsettings($cdom,$crstype);
                    foreach my $entry (@{$item->{'ordered'}}) {
                        next if (($entry eq 'hidefromcat') &&
                                 (!$can_toggle_cat));
                        next if (($entry eq 'categories') &&
                                 (!$can_categorize));
                        next if (($entry eq 'loncaparev') || 
                                ($entry eq 'owner') ||
                                ($entry eq 'clonedfrom') ||
                                ($entry eq 'syllabus'));
                        push(@ordered,$entry);
                    }
                } elsif ($action eq 'classlists') {
                    foreach my $entry (@{$item->{'ordered'}}) {
                        next if ($entry eq 'defaultcredits');
                        push(@ordered,$entry);
                    }
                } else {
                    @ordered = @{$item->{'ordered'}};
                }
            }
            if (@ordered > 0) {
                if ($action eq 'feedback') {
                    foreach my $entry (@ordered) {
                        my $userstr = '';
                        my $total = $env{'form.'.$entry.'_total'};
                        if ($total) {
                            my @deletes = &Apache::loncommon::get_env_multiple('form.'.$entry.'_delete');
                            for (my $i=0; $i<$total; $i++) {
                                unless (grep(/^$i$/,@deletes)) {
                                    $userstr .= $env{'form.'.$entry.'_user_'.$i}.
                                                &get_sec_str($entry,$i).',';
                                }
                            }
                        } else {
                            $total = 0;
                        } 
                        if ($env{'form.'.$entry.'_uname_'.$total} ne '') {
                            my $uname = $env{'form.'.$entry.'_uname_'.$total};
                            my $udom = $env{'form.'.$entry.'_udom_'.$total};
                            if (&Apache::lonnet::homeserver($uname,$udom) eq 'no_host') {
                                $userstr =~ s/,$//;
                                $disallowed->{'feedback'}{$entry} = $uname.':'.$udom;
                            } else {
                                $userstr .= $uname.':'.$udom.&get_sec_str($entry,$total);
                            }
                        } else {
                            $userstr =~ s/,$//;
                        }
                        $newvalues{$entry} = $userstr;
                        if ($newvalues{$entry} ne $values->{$entry}) {
                            $changes->{$entry} = $newvalues{$entry};
                        }
                        my $ext_entry = $entry.'.text';
                        $newvalues{$ext_entry} = $env{'form.'.$ext_entry};
                        if ($newvalues{$ext_entry} ne $values->{$ext_entry}) {
                            $changes->{$ext_entry} = $newvalues{$ext_entry};
                        }
                    }
                } elsif ($action eq 'menuitems') {
                    my (%current,@colls);
                    my $next = 1;
                    if ($values->{'menucollections'}) {
                        foreach my $item (split(/;/,$values->{'menucollections'})) {
                            my ($num,$value) = split(/\%/,$item);
                            if ($num =~ /^\d+$/) {
                                unless (grep(/^$num$/,@colls)) {
                                    push(@colls,$num);
                                }
                                my @entries = split(/\&/,$value);
                                foreach my $entry (@entries) {
                                    my ($name,$fields) = split(/=/,$entry);
                                    $current{$num}{$name} = $fields;
                                }
                            }
                        }
                    }
                    if (@colls) {
                        @colls = sort { $a <=> $b } @colls;
                        $next += $colls[-1];
                    }
                    if ($env{'form.menucollections_add'} eq $next) {
                        push(@colls,$next);
                    }
                    my $currdef = $values->{'menudefault'};
                    my $possdef = $env{'form.menudefault'};
                    if (($possdef =~ /^\d+$/) && (grep(/^$possdef$/,@colls))) {
                        if ($currdef ne $possdef) {
                            $changes->{'menudefault'} = $possdef;
                        }
                    } elsif ($currdef) {
                        $changes->{'menudefault'} = '';
                    }
                    my $menucoll;
                    if (@colls) {
                        my ($ordered,$cats) = &menuitems_categories();
                        my %shortcats = &menuitems_abbreviations();
                        foreach my $num (@colls) {
                            my ($entry,%include);
                            map { $include{$_}= 1; } &Apache::loncommon::get_env_multiple('form.menucollections_'.$num);
                            foreach my $item (@{$ordered}) {
                                if ($item eq 'shown') {
                                    foreach my $type (@{$cats->{$item}}) {
                                        $entry .= $type.'=';
                                        if ($include{$type}) {
                                            $entry .= 'y';
                                        } else {
                                            $entry .= 'n';
                                        }
                                        $entry .= '&';
                                    }
                                } else {
                                    $entry .= $shortcats{$item}.'=';
                                    foreach my $type (@{$cats->{$item}}) {
                                        if ($include{$type}) {
                                            $entry .= $type.',';
                                        }
                                    }
                                    $entry =~ s/,$//;
                                    $entry .= '&';
                                }
                            }
                            $entry =~ s/\&$//;
                            if ($menucoll) {
                                $menucoll .= ';';
                            }
                            $menucoll .= $num.'%'.$entry;
                        }
                        if ($menucoll ne $values->{'menucollections'}) {
                            $changes->{'menucollections'} = $menucoll;
                        }
                    } elsif ($values->{'menucollections'}) {
                        $changes->{'menucollections'} = '';
                    }
                } elsif ($action eq 'linkprot') {
                    if (ref($values) eq 'HASH') {
                        $errors = &process_linkprot($cdom,$cnum,$values->{$action},$changes,'course',$lastactref);
                    }
                } elsif ($action eq 'ltitools') {
                    if (ref($values) eq 'HASH') {
                        my $switchserver = &check_switchserver($cdom,$cnum,'course','/adm/courseprefs');
                        $errors = &process_ltitools('',$cdom,$cnum,$values->{$action},$changes,'course',$lastactref,
                                                    'ok','','ok');
                    }
                } else {
                    foreach my $entry (@ordered) {
                        if ($entry eq 'cloners') {
                            if ($env{'form.cloners_all'}) {
                                $newvalues{$entry} = '*';
                            } else {
                                my @clonedoms;
                                if (exists($env{'form.cloners_activate'})) {
                                    my $actnum = $env{'form.cloners_activate'};
                                    if ($actnum ne '-1') {
                                        if ($env{'form.cloners_dom_'.$actnum} ne '') {
                                            my $clonedom = $env{'form.cloners_dom_'.$actnum};
                                            if (&check_clone($clonedom,$disallowed) eq 'ok') {
                                                $newvalues{$entry} = '*:'.$clonedom;
                                                push(@clonedoms,$newvalues{$entry});
                                            }
                                        }
                                    }
                                } else {
                                    my $num = $env{'form.cloners_total'};
                                    my @deletes = 
                                        &Apache::loncommon::get_env_multiple('form.cloners_delete');
                                    for (my $i=0; $i<$num; $i++) {
                                        if (!grep(/^$i$/,@deletes)) {
                                            my $clonedom = $env{'form.cloners_dom_'.$i};
                                            if (&check_clone($clonedom,$disallowed) eq 'ok') {
                                                if (!grep(/^\*:\Q$clonedom\E$/,@clonedoms)) {
                                                    push(@clonedoms,'*:'.$clonedom);
                                                }
                                            }
                                        }
                                    }
                                    if (@clonedoms) {
                                        $newvalues{$entry}=join(',',@clonedoms);
                                    }
                                }
                                if ($env{'form.cloners_newdom'} ne '') {
                                    my $clonedom = $env{'form.cloners_newdom'};
                                    if (&check_clone($clonedom,$disallowed) eq 'ok') {
                                        my $newdom = '*:'.$env{'form.cloners_newdom'};
                                        if (@clonedoms) {
                                            if (!grep(/^\Q$newdom\E$/,@clonedoms)) {
                                                $newvalues{$entry} .= ','.$newdom;
                                            }
                                        } else {
                                            $newvalues{$entry} = $newdom;
                                        }
                                    }
                                }
                                if ($env{'form.'.$entry} ne '') {
                                    my @cloners = split(',',$env{'form.'.$entry});
                                    my @okcloners;
                                    foreach my $cloner (@cloners) {
                                        $cloner =~ s/^\s+//;
                                        $cloner =~ s/\s+$//;
                                        unless ($cloner eq '') {
                                            my ($uname,$udom) = split(':',$cloner);
                                            if (&check_clone($udom,$disallowed,$uname) eq 'ok') {
                                                if (!grep(/^\Q$cloner\E$/,@okcloners)) {
                                                    push(@okcloners,$cloner);
                                                }
                                            }
                                        }
                                    }
                                    if (@okcloners) {
                                        my $okclonestr = join(',',@okcloners);
                                        if ($newvalues{$entry} ne '') {
                                            $newvalues{$entry} .= ','.$okclonestr;
                                        } else {
                                            $newvalues{$entry} = $okclonestr;
                                        }
                                    }
                                }
                                if (ref($values) eq 'HASH') {
                                    my (@code_order,%codedefaults);
                                    &Apache::lonnet::auto_instcode_defaults($cdom,\%codedefaults,
                                                                            \@code_order);
                                    my $clonebycode;
                                    if ($env{'form.cloners_instcode'}) {
                                        if (@code_order > 0) {
                                            my @standardnames = &Apache::loncommon::get_standard_codeitems();
                                            my %local_to_standard;
                                            for (my $i=0; $i<@code_order; $i++) {
                                                $local_to_standard{$code_order[$i]} = $standardnames[$i];
                                            }
                                            foreach my $item (@code_order) {
                                                my $key = $local_to_standard{$item};
                                                if ($key ne '') {
                                                    if ($env{'form.'.$key}) {
                                                        $clonebycode .= $key.'='.&escape($env{'form.'.$key}).'&';
                                                    }
                                                }
                                            }
                                            $clonebycode =~ s/\&$//;
                                        }
                                    }
                                    if ($clonebycode) {
                                        if ($newvalues{$entry}) {
                                            $newvalues{$entry} .= ','.$clonebycode;
                                        } else {
                                            $newvalues{$entry} = $clonebycode;
                                        }
                                    }
                                }
                            }
                            if (ref($disallowed) eq 'HASH') {
                                if (ref($disallowed->{'cloners'}) eq 'HASH') {
                                    foreach my $key (keys(%{$disallowed->{'cloners'}})) {
                                        $disallowed->{'cloners'}{$key} =~ s/,$//;
                                    }
                                }
                            }
                        } elsif ($entry eq 'co-owners') {
                            my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
                            my $coowners = $values->{'internal.co-owners'};
                            my @currcoown;
                            if ($coowners) {
                                @currcoown = split(',',$coowners);
                            }
                            if (&Apache::lonnet::is_course_owner($cdom,$cnum)) {
                                my $autocoowner;
                                if (($crstype eq 'Course') && 
                                    ($values->{'internal.coursecode'})) {
                                    my %domconf =
                                        &Apache::lonnet::get_dom('configuration',['autoenroll'],$cdom);
                                    if (ref($domconf{'autoenroll'}) eq 'HASH') {
                                        $autocoowner = $domconf{'autoenroll'}{'co-owners'};
                                    }
                                }
                                if ($autocoowner) {
                                    $newvalues{'co-owners'} = $values->{'internal.co-owners'}; 
                                } else {
                                    my @keepcoowners = &Apache::loncommon::get_env_multiple('form.coowners');
                                    my @pendingcoowners = &Apache::loncommon::get_env_multiple('form.pendingcoowners');
                                    my @invitecoowners =  &Apache::loncommon::get_env_multiple('form.invitecoowners');
                                    if (@invitecoowners) {
                                        push(@pendingcoowners,@invitecoowners);
                                    }
                                    $newvalues{'pendingco-owners'} = join(',',sort(@pendingcoowners));
                                    $newvalues{'co-owners'} = join(',',sort(@keepcoowners));
                                    if ($newvalues{'co-owners'} ne $values->{'internal.co-owners'}) {
                                        $changes->{$entry}{'co-owners'} = $newvalues{'co-owners'};
                                        push(@{$changes->{$entry}{'changed'}},'co-owners');
                                    }
                                    if ($newvalues{'pendingco-owners'} ne $values->{'internal.pendingco-owners'}) {
                                        $changes->{$entry}{'pendingco-owners'} = $newvalues{'pendingco-owners'};
                                        push(@{$changes->{$entry}{'changed'}},'pendingco-owners');
                                    }
                                }
                            } else {
                                my (@newpending,@newcoown);
                                my $uname = $env{'user.name'};
                                my $udom = $env{'user.domain'};
                                my $pendingcoowners = $values->{'internal.pendingco-owners'};
                                my @pendingcoown = split(',',$pendingcoowners);
                                if ($env{'form.pending_coowner'}) {
                                    foreach my $item (@pendingcoown) {
                                        unless ($item eq $uname.':'.$udom) {
                                            push(@newpending,$item);
                                        }
                                    }
                                    @newcoown = @currcoown;
                                    if ($env{'form.pending_coowner'} eq 'accept') {
                                        unless (grep(/^\Q$uname\E:\Q$udom\E$/,@currcoown)) {
                                            push(@newcoown,$uname.':'.$udom);
                                        }
                                    }
                                } elsif ($env{'form.remove_coowner'}) {
                                    foreach my $item (@currcoown) {
                                        unless ($item eq $uname.':'.$udom) {
                                            push(@newcoown,$item);
                                        }
                                    }
                                    if ($pendingcoowners ne '') {
                                        @newpending = @pendingcoown;
                                    }
                                } else {
                                    @newcoown = @currcoown;
                                }
                                $newvalues{'pendingco-owners'} = join(',',sort(@newpending));
                                $newvalues{'co-owners'} = join(',',sort(@newcoown));
                                if ($newvalues{'co-owners'} ne $values->{'internal.co-owners'}) {
                                    $changes->{$entry}{'co-owners'} = $newvalues{'co-owners'};
                                    push(@{$changes->{$entry}{'changed'}},'co-owners');
                                }
                                if ($newvalues{'pendingco-owners'} ne $values->{'internal.pendingco-owners'}) {
                                    $changes->{$entry}{'pendingco-owners'} = $newvalues{'pendingco-owners'};
                                    push(@{$changes->{$entry}{'changed'}},'pendingco-owners');
                                }
                            }
                        } elsif ($entry =~ /^default_enrollment_(start|end)_date$/) {
                            $newvalues{$entry}=&Apache::lonhtmlcommon::get_date_from_form($entry);
                        } elsif ($entry eq 'rolenames') {
                            my %adv_roles =
                                &Apache::lonnet::get_course_adv_roles($env{'request.course.id'},1);
                            my @stds;
                            if ($crstype eq 'Community') {
                                @stds = ('co');
                            } else {
                                @stds = ('cc');
                            }
                            push(@stds,('in','ta','ep','ad','st'));
                            my (@replacements,@regulars);
                            foreach my $role (@stds) {
                                if ($values->{$role.'.plaintext'} ne '') {
                                    push(@replacements,$role);
                                } else {
                                    push(@regulars,$role);
                                }
                            }
                            foreach my $stdrole (@stds) {
                                my $ext_entry = $entry.'_'.$stdrole;
                                my $stdname = &Apache::lonnet::plaintext($stdrole,$crstype,
                                                                         $env{'request.course.id'},1);
                                if ($env{'form.'.$ext_entry} eq $stdname) {
                                    $newvalues{$ext_entry} = '';
                                } else {
                                    $newvalues{$ext_entry} = $env{'form.'.$ext_entry};
                                }
                                if ($newvalues{$ext_entry} ne $values->{$stdrole.'.plaintext'}) {
                                    my $dupname = 0;
                                    if ($newvalues{$ext_entry} ne '') {
                                        if (grep(/^\Q$newvalues{$ext_entry}\E$/,@replacements)) {
                                            $dupname = 1;
                                            push(@{$disallowed->{'rolenames'}{'replacements'}},$newvalues{$ext_entry});
                                        }
                                        if (!$dupname) {
                                            if (grep(/^\Q$newvalues{$ext_entry}\E$/,@regulars)) {
                                                $dupname = 1;
                                                push(@{$disallowed->{rolenames}{'regulars'}},$newvalues{$ext_entry});
                                            }
                                        }
                                        if (!$dupname) {
                                            foreach my $role (keys(%adv_roles)) {
                                                if ($role =~ m{^cr/$match_domain/$match_name/\Q$newvalues{$ext_entry}\E$}) {
                                                    $dupname = 1;
                                                    push(@{$disallowed->{rolenames}{'customrole'}},$newvalues{$ext_entry});
                                                    last;
                                                }
                                            }
                                        }
                                    }
                                    if (!$dupname) {
                                        $changes->{$ext_entry} = $newvalues{$ext_entry};
                                    }
                                }
                            }
                        } elsif (($entry eq 'plc.roles.denied') || ($entry eq 'pch.roles.denied') ||
                                 ($entry eq 'pac.roles.denied')) {
                            my @denied = &Apache::loncommon::get_env_multiple('form.'.$entry);
                            @denied = sort(@denied);
                            my $deniedstr = '';
                            if (@denied > 0) {
                                $deniedstr = join(',',@denied);  
                            }
                            $newvalues{$entry} = $deniedstr;
                        } elsif (($entry eq 'plc.users.denied') || ($entry eq 'pch.users.denied') ||
                                 ($entry eq 'pac.users.denied')) {
                            my $total = $env{'form.'.$entry.'_total'};
                            my $userstr = '';
                            my @denied;  
                            if ($total > 0) {
                                my @deletes = 
                                    &Apache::loncommon::get_env_multiple('form.'.$entry.'_delete');
                                for (my $i=0; $i<$total; $i++) {
                                    unless (grep(/^$i$/,@deletes)) {
                                        $userstr .= $env{'form.'.$entry.'_user_'.$i}.',';
                                        push(@denied,$env{'form.'.$entry.'_user_'.$i});
                                    }
                                }
                            } else {
                                $total = 0;
                            }
                            if ($env{'form.'.$entry.'_uname_'.$total} ne '') {
                                my $uname = $env{'form.'.$entry.'_uname_'.$total};
                                my $udom = $env{'form.'.$entry.'_udom_'.$total};
                                if (&Apache::lonnet::homeserver($uname,$udom) eq 'no_host') {
                                    $userstr =~ s/,$//;
                                    $disallowed->{'discussion'}{$entry} = $uname.':'.$udom;
                                } else {
                                    my $newuser .= $uname.':'.$udom;
                                    if (grep(/^\Q$newuser\E$/,@denied)) {
                                        $userstr =~ s/,$//;
                                    } else {
                                        $userstr .= $newuser;
                                    }
                                }
                            } else {
                                $userstr =~ s/,$//;
                            }
                            $newvalues{$entry} = $userstr;
                        } elsif ($entry eq 'allow_discussion_post_editing') {
                            my @canedit = &Apache::loncommon::get_env_multiple('form.'.$entry);
                            @canedit = sort(@canedit);
                            foreach my $role (@canedit) {
                                my @secs = &Apache::loncommon::get_env_multiple('form.'.$entry.'_sections_'.$role);
                                if ((grep(/^\s*$/,@secs)) || (@secs == 0)) {
                                    $newvalues{$entry} .= $role.',';
                                } else {
                                    foreach my $sec (@secs) {
                                        $newvalues{$entry} .= $role.':'.$sec.',';
                                    }
                                }
                            }
                            $newvalues{$entry} =~ s/,$//;
                        } elsif ($entry eq 'discussion_post_fonts') {
                            my ($classorder,$classtitles) = &discussion_vote_classes();
                            my $fontchange = 0;
                            foreach my $class (@{$classorder}) {
                                my $ext_entry = $entry.'_'.$class;
                                my $size = $env{'form.'.$ext_entry.'_size'};
                                my $unit = $env{'form.'.$ext_entry.'_unit'};
                                my $weight = $env{'form.'.$ext_entry.'_weight'};
                                my $style = $env{'form.'.$ext_entry.'_style'};
                                my $other = $env{'form.'.$ext_entry.'_other'};
                                $size =~ s/,//g;
                                $unit =~ s/,//g;
                                $weight =~ s/,//g;
                                $style =~ s/,//g;
                                $other =~ s/[^\w;:\s\-\%.]//g;
                                $other =~ s/(^\s+|\s+$)//g;
                                $newvalues{$ext_entry} = join(',',($size.$unit,$weight,$style,$other));
                                my $current = $values->{$ext_entry};
                                if ($values->{$ext_entry} eq '') {
                                    $current = ',,,';
                                }
                                if ($newvalues{$ext_entry} ne $current) {
                                    $changes->{$ext_entry} = $newvalues{$ext_entry};
                                    $fontchange ++;
                                }
                            }
                            if ($fontchange) {
                                $changes->{$entry} = 1;
                            }
                        } elsif ($entry eq 'nothideprivileged') {
                            my @curr_nothide;
                            my @new_nothide;
                            if ($values->{$entry} ne '') {
                                foreach my $user (split(/\s*\,\s*/,$values->{$entry})) {
                                    my $nothide;
                                    if ($user !~ /:/) {
                                        $nothide = join(':',split(/[\@]/,$user));
                                    } else {
                                        $nothide = $user;
                                    }
                                    if ((defined($nothide)) && 
                                        (!grep(/^\Q$nothide\E$/,@curr_nothide))) {
                                        push(@curr_nothide,$nothide);   
                                    }
                                }
                            }
                            foreach my $key (keys(%env)) {
                                if ($key =~ /^form\.\Q$entry\E_($match_username:$match_domain)$/) {
                                    if ($env{$key}) {
                                       my $nothide = $1;
                                       if (!grep(/^\Q$nothide\E$/,@new_nothide)) {
                                           push(@new_nothide,$nothide); 
                                        }
                                    }
                                }
                            }
                            @new_nothide = sort(@new_nothide);
                            my @differences =
                                &Apache::loncommon::compare_arrays(\@curr_nothide,
                                                                   \@new_nothide);
                            if (@differences > 0) {
                                if (@new_nothide > 0) { 
                                    $newvalues{$entry} = join(',',@new_nothide);
                                } else {
                                    $newvalues{$entry} = '';
                                }
                            } else {
                                $newvalues{$entry} = $values->{$entry}; 
                            }
                        } elsif ($entry eq 'print_header_format') {
                            my $maxnum = $env{'form.printfmthdr_maxnum'};
                            my @newhdr;
                            if ($maxnum > 2) {
                                for (my $i=0; $i<$maxnum-2; $i++) {
                                    if ($env{'form.printfmthdr_del_'.$i}) {
                                        $newhdr[$env{'form.printfmthdr_pos_'.$i}] = '';
                                    } else {
                                        my $hdr;
                                        if ($env{'form.printfmthdr_sub_'.$i} =~ /^[nca]$/) {
                                            $hdr = '%';
                                            if ($env{'form.printfmthdr_limit_'.$i} =~ /^\d+$/) {
                                                $hdr .= $env{'form.printfmthdr_limit_'.$i};
                                            }
                                            $hdr .= $env{'form.printfmthdr_sub_'.$i};
                                        } elsif ($env{'form.printfmthdr_text_'.$i} ne '') {
                                            $hdr = $env{'form.printfmthdr_text_'.$i};
                                        }
                                        $newhdr[$env{'form.printfmthdr_pos_'.$i}] = $hdr;
                                    }
                                }
                            }
                            my $newsub = $maxnum-2;
                            if ($env{'form.printfmthdr_sub_'.$newsub} =~ /^[nca]$/) {
                                my $hdr = '%';
                                if ($env{'form.printfmthdr_limit_'.$newsub} =~ /^\d+$/) {
                                    $hdr .= $env{'form.printfmthdr_limit_'.$newsub};
                                }
                                $hdr .= $env{'form.printfmthdr_sub_'.$newsub};
                                $newhdr[$env{'form.printfmthdr_pos_'.$newsub}] = $hdr;
                            }
                            my $newtext = $maxnum-1;
                            $newhdr[$env{'form.printfmthdr_pos_'.$newtext}] = $env{'form.printfmthdr_text_'.$newtext};
                            $newvalues{$entry} = join('',@newhdr);
                        } elsif (($entry eq 'languages') ||
                                 ($entry eq 'checkforpriv')) {
                            my $settings;
                            my $total = $env{'form.'.$entry.'_total'};
                            if ($total) {
                                my @deletes = &Apache::loncommon::get_env_multiple('form.'.$entry.'_delete');
                                for (my $i=0; $i<$total; $i++) {
                                    unless (grep(/^$i$/,@deletes)) {
                                        $settings .= $env{'form.'.$entry.'_'.$i}.',';
                                    }
                                }
                            } else {
                                $total = 0;
                            }
                            if ($env{'form.'.$entry.'_'.$total} ne '') {
                                my $new = $env{'form.'.$entry.'_'.$total};
                                if ($entry eq 'languages') {
                                    my %langchoices = &get_lang_choices();
                                    if ($langchoices{$new}) {
                                        $settings .= $new;
                                    } else {
                                        $settings =~ s/,$//;
                                        $disallowed->{'localization'}{$entry} = $new;
                                    }
                                } else {
                                    my %domains=map { $_ => 1; } &Apache::lonnet::all_domains();
                                    if ($domains{$new}) {
                                        $settings .= $new;
                                    } else {
                                        $settings =~ s/,$//;
                                        $disallowed->{'classlists'}{$entry} = $new;
                                    }
                                }
                            } else {
                                $settings =~ s/,$//;
                            }
                            $newvalues{$entry} = $settings;
                        } elsif ($action eq 'lti') {
                            if ($entry eq 'lti.override') {
                                $newvalues{$entry} = $env{'form.'.$entry};
                            } elsif (($entry eq 'lti.topmenu') || ($entry eq 'lti.inlinemenu')) {
                                if ($env{'form.lti.override'}) {
                                    $newvalues{$entry} = $env{'form.'.$entry};
                                } else {
                                    $newvalues{$entry} = '';
                                }
                            } elsif ($entry eq 'lti.lcmenu') {
                                if (($env{'form.lti.override'}) &&
                                    (($env{'form.lti.topmenu'}) || ($env{'form.lti.inlinemenu'}))) {
                                    my @lcmenu = &Apache::loncommon::get_env_multiple('form.lti.lcmenu');
                                    my @newlcmenu;
                                    if (@lcmenu) {
                                        my @menuitems = ('fullname','coursetitle','role','logout','grades');
                                        foreach my $item (@menuitems) {
                                            next if (($item eq 'grades') && (!$newvalues{'lti.inlinemenu'}));
                                            if (grep(/^\Q$item\E$/,@lcmenu)) {
                                                push(@newlcmenu,$item);
                                            }
                                        }
                                    }
                                    if (@newlcmenu) {
                                        $newvalues{$entry} = join(',',@newlcmenu);
                                    } else {
                                        $newvalues{$entry} = 'none';
                                    }
                                } else {
                                    $newvalues{$entry} = '';
                                }
                            }
                        } elsif ($entry eq 'extresource') {
                            if ($env{'form.'.$entry} =~ /^iframe|tab|window$/) {
                                $newvalues{$entry} = $env{'form.'.$entry};
                                if ($env{'form.'.$entry} ne 'iframe') {
                                    if ($env{'form.extwintabreuse'}) {
                                        $newvalues{$entry} .= ':1';
                                    } else {
                                        $newvalues{$entry} .= ':0';
                                    }
                                    if ($env{'form.'.$entry} eq 'window') {
                                        foreach my $dim ('width','height') {
                                            $env{'form.extreswin'.$dim} =~ s/^\s+|\s+$//g;
                                            if ($env{'form.extreswin'.$dim} =~ /^\d+$/) {
                                                $newvalues{$entry} .= ':'.$env{'form.extreswin'.$dim};
                                            } else {
                                                $newvalues{$entry} .= ':';
                                            }
                                        }
                                    }
                                }
                            }
                            unless (($newvalues{$entry} eq 'iframe') && ($values->{$entry} eq '')) {
                                if ($newvalues{$entry} ne $values->{$entry}) {
                                    $changes->{$entry} = $newvalues{$entry};
                                }
                            }
                        } elsif ($entry eq 'timezone') {
                            if ($env{'form.'.$entry}) {
                                $newvalues{$entry} = $env{'form.'.$entry};
                                if ($newvalues{$entry} ne $values->{$entry}) {
                                    $changes->{$entry} = $newvalues{$entry};
                                }
                                if ($env{'form.tzover'}) {
                                    $newvalues{'tzover'} = $env{'form.tzover'};
                                    if ($newvalues{'tzover'} ne $values->{'tzover'}) {
                                        $changes->{'tzover'} = $newvalues{'tzover'};
                                    }
                                } elsif ($values->{'tzover'}) {
                                    $changes->{'tzover'} = '';
                                }
                            } elsif ($values->{$entry}) {
                                $changes->{$entry} = '';
                            }
                        } elsif ($entry eq 'grading') {
                            if ($env{'form.'.$entry} eq 'standard') {
                                if ($env{'form.hidetotals'}) {
                                    my %sections = &Apache::loncommon::get_sections($cdom,$cnum);
                                    if (keys(%sections)) {
                                        my @secs = &Apache::loncommon::get_env_multiple('form.hidetotals_sections');
                                        if (grep(/^all$/,@secs)) {
                                            $newvalues{'hidetotals'} = 'all';
                                        } elsif (@secs) {
                                            $newvalues{'hidetotals'} = '';
                                            foreach my $sec (sort {$a <=> $b} @secs) {
                                                if (exists($sections{$sec})) {
                                                    $newvalues{'hidetotals'} .= $sec.','
                                                }
                                            }
                                            $newvalues{'hidetotals'} =~ s/,$//;
                                        }
                                    } else {
                                        $newvalues{'hidetotals'} = 'all';
                                    }
                                }
                            }
                            if ($newvalues{'hidetotals'} ne $values->{'hidetotals'}) {
                                $changes->{'hidetotals'} = $newvalues{'hidetotals'};
                                $changes->{'grading'} = $env{'form.'.$entry};
                            }
                            $newvalues{$entry} = $env{'form.'.$entry};
                        } else {
                            $newvalues{$entry} = $env{'form.'.$entry};
                        }
                        unless (($entry eq 'co-owners') || ($entry eq 'discussion_post_fonts') ||
                                ($entry eq 'extresource') || ($entry eq 'timezone')) {
                            if ($newvalues{$entry} ne $values->{$entry}) {
                                $changes->{$entry} = $newvalues{$entry};
                            }
                        }
                    }
                }
            }
        }
    }
    return $errors;
}

sub process_linkprot {
    my ($cdom,$cnum,$values,$changes,$context,$lastactref) = @_;
    my ($dest,$ltiauth,$privnum,$cipher,$errors,%linkprot);
    if (ref($values) eq 'HASH') {
        foreach my $id (keys(%{$values})) {
            if ($id =~ /^\d+$/) {
                unless (ref($values->{$id}) eq 'HASH') {
                    $linkprot{$id} = '';
                }
            }
        }
    }
    ($cipher,$privnum) = &get_credentials($cdom,$cnum,'lti',$context);
    if ($context eq 'domain') {
        $dest = '/adm/domainprefs';
        $ltiauth = 1;
    } else {
        $dest = '/adm/courseprefs';
        if (exists($env{'course.'.$env{'request.course.id'}.'.internal.ltiauth'})) {
            $ltiauth = $env{'course.'.$env{'request.course.id'}.'.internal.ltiauth'};
        } else {
            my %domdefs = &Apache::lonnet::get_domain_defaults($cdom);
            $ltiauth = $domdefs{'crsltiauth'};
        }
    }
    my $switchserver = &check_switchserver($cdom,$cnum,$context,$dest);
    my (@items,%deletions,%itemids,%haschanges);
    if ($env{'form.linkprot_add'}) {
        my $name = $env{'form.linkprot_name_add'};
        $name =~ s/(`)/'/g;
        my ($newid,$error) = &get_linkprot_id($cdom,$cnum,$name,$context);
        if ($newid) {
            $itemids{'add'} = $newid;
            push(@items,'add');
            $haschanges{$newid} = 1;
        } else {
            $errors .= '<span class="LC_error">'.
                       &mt('Failed to acquire unique ID for link protection').
                       '</span>';
        }
    }
    if (ref($values) eq 'HASH') {
        my @todelete = &Apache::loncommon::get_env_multiple('form.linkprot_del');
        my $maxnum = $env{'form.linkprot_maxnum'};
        for (my $i=0; $i<$maxnum; $i++) {
            my $itemid = $env{'form.linkprot_id_'.$i};
            $itemid =~ s/\D+//g;
            if ($itemid) {
                if (ref($values->{$itemid}) eq 'HASH') {
                    push(@items,$i);
                    $itemids{$i} = $itemid;
                    if ((@todelete > 0) && (grep(/^$i$/,@todelete))) {
                        $deletions{$itemid} = $values->{$itemid}->{'name'};
                    }
                }
            }
        }
    }
    foreach my $idx (@items) {
        my $itemid = $itemids{$idx};
        next unless ($itemid);
        if (exists($deletions{$itemid})) {
            $linkprot{$itemid} = $deletions{$itemid};
            $haschanges{$itemid} = 1;
            next;
        }
        my %current;
        if (ref($values) eq 'HASH') {
            if (ref($values->{$itemid}) eq 'HASH') {
                foreach my $key (keys(%{$values->{$itemid}})) {
                    $current{$key} = $values->{$itemid}->{$key};
                }
            }
        }
        foreach my $inner ('name','lifetime','version') {
            my $formitem = 'form.linkprot_'.$inner.'_'.$idx;
            $env{$formitem} =~ s/(`)/'/g;
            if ($inner eq 'lifetime') {
                $env{$formitem} =~ s/[^\d.]//g;
            }
            unless ($idx eq 'add') {
                if ($current{$inner} ne $env{$formitem}) {
                    $haschanges{$itemid} = 1;
                }
            }
            if ($env{$formitem} ne '') {
                $linkprot{$itemid}{$inner} = $env{$formitem};
            }
        }
        my $urlitem = 'form.linkprot_returnurl_'.$idx;
        my $urlparamname = 'form.linkprot_urlparam_'.$idx;
        if ($env{$urlitem} == 1) {
            $env{$urlparamname} =~ s/(`)/'/g;
        } elsif (exists($env{$urlparamname})) {
            $env{$urlparamname} = '';
        }
        my $passback = 'form.linkprot_passback_'.$idx;
        my $passbackparamname = 'form.linkprot_passbackformat_'.$idx;
        if ($env{$passback} == 1) {
            unless ($env{$passbackparamname} =~ /^1\.(0|1)$/) {
                $env{$passbackparamname} = '';
            }
        } elsif (exists($env{$passbackparamname})) {
            $env{$passbackparamname} = '';
        }
        unless ($idx eq 'add') {
            if ((!$current{'returnurl'} && ($env{$urlparamname} ne '')) ||
                ($current{'returnurl'} && ($env{$urlparamname} eq ''))) {
                $haschanges{$itemid} = 1;
            }
            if ((!$current{'passback'} && ($env{$passbackparamname} ne '')) ||
                ($current{'passback'} && ($env{$passbackparamname} eq ''))) {
                $haschanges{$itemid} = 1;
            }
        }
        if ($env{$urlparamname} ne '') {
            $linkprot{$itemid}{'returnurl'} = $env{$urlparamname};
        }
        if ($env{$passbackparamname} ne '') {
            $linkprot{$itemid}{'passback'} = 1;
            $linkprot{$itemid}{'passbackformat'} = $env{$passbackparamname};
        }
        if ($ltiauth) {
            my $reqitem = 'form.linkprot_requser_'.$idx;
            $env{$reqitem} =~ s/(`)/'/g;
            unless ($idx eq 'add') {
                if ((!$current{'requser'} && $env{$reqitem}) ||
                    ($current{'requser'} && !$env{$reqitem})) {
                    $haschanges{$itemid} = 1;
                }
            }
            if ($env{$reqitem} == 1) {
                $linkprot{$itemid}{'requser'} = $env{$reqitem};
                foreach my $inner ('mapuser','notstudent') {
                    my $formitem = 'form.linkprot_'.$inner.'_'.$idx;
                    $env{$formitem} =~ s/(`)/'/g;
                    if ($inner eq 'mapuser') {
                        if ($env{$formitem} eq 'other') {
                            my $mapuser = $env{'form.linkprot_customuser_'.$idx};
                            $mapuser =~ s/(`)/'/g;
                            $mapuser =~ s/^\s+|\s+$//g;
                            if ($mapuser ne '') {
                                $linkprot{$itemid}{$inner} = $mapuser;
                            } else {
                                delete($linkprot{$itemid}{'requser'});
                                last;
                            }
                        } elsif ($env{$formitem} eq 'sourcedid') {
                            $linkprot{$itemid}{$inner} = 'lis_person_sourcedid';
                        } elsif ($env{$formitem} eq 'email') {
                            $linkprot{$itemid}{$inner} = 'lis_person_contact_email_primary';
                        }
                    } else {
                        $linkprot{$itemid}{$inner} = $env{$formitem};
                    }
                    unless ($idx eq 'add') {
                        if ($current{$inner} ne $linkprot{$itemid}{$inner}) {
                            $haschanges{$itemid} = 1;
                        }
                    }
                }
            }
        }
        unless ($switchserver) {
            my $keyitem = 'form.linkprot_key_'.$idx;
            $env{$keyitem} =~ s/(`)/'/g;
            unless ($idx eq 'add') {
                if ($current{'key'} ne $env{$keyitem}) {
                    $haschanges{$itemid} = 1;
                }
            }
            if ($env{$keyitem} ne '') {
                $linkprot{$itemid}{'key'} = $env{$keyitem};
            }
            my $secretitem = 'form.linkprot_secret_'.$idx;
            $env{$secretitem} =~ s/(`)/'/g;
            if ($current{'usable'}) {
                if ($env{'form.linkprot_changesecret_'.$idx}) {
                    if ($env{$secretitem} ne '') {
                        if ($privnum && $cipher) {
                            $linkprot{$itemid}{'secret'} = $cipher->encrypt_hex($env{$secretitem});
                            $linkprot{$itemid}{'cipher'} = $privnum;
                        } else {
                            $linkprot{$itemid}{'secret'} = $env{$secretitem};
                        }
                        $haschanges{$itemid} = 1;
                    }
                } else {
                    $linkprot{$itemid}{'secret'} = $current{'secret'};
                    $linkprot{$itemid}{'cipher'} = $current{'cipher'};
                }
            } elsif ($env{$secretitem} ne '') {
                if ($privnum && $cipher) {
                    $linkprot{$itemid}{'secret'} = $cipher->encrypt_hex($env{$secretitem});
                    $linkprot{$itemid}{'cipher'} = $privnum;
                } else {
                    $linkprot{$itemid}{'secret'} = $env{$secretitem};
                }
                $haschanges{$itemid} = 1;
            }
        }
    }
    if (keys(%haschanges)) {
        foreach my $entry (keys(%haschanges)) {
            $changes->{$entry} = $linkprot{$entry};
        }
        if (ref($lastactref) eq 'HASH') {
            $lastactref->{'courselti'} = 1;
        }
    }
    return $errors;
}

sub get_linkprot_id {
    my ($cdom,$cnum,$name,$context) = @_;
    # get lock on lti db in course or linkprot db in domain
    my $lockhash = {
                      lock => $env{'user.name'}.
                              ':'.$env{'user.domain'},
                   };
    my $tries = 0;
    my $gotlock;
    if ($context eq 'domain') {
        $gotlock = &Apache::lonnet::newput_dom('linkprot',$lockhash,$cdom);
    } else {
        $gotlock = &Apache::lonnet::newput('lti',$lockhash,$cdom,$cnum);
    }
    my ($id,$error);
    while (($gotlock ne 'ok') && ($tries<10)) {
        $tries ++;
        sleep (0.1);
        if ($context eq 'domain') {
            $gotlock = &Apache::lonnet::newput_dom('linkprot',$lockhash,$cdom);
        } else {
            $gotlock = &Apache::lonnet::newput('lti',$lockhash,$cdom,$cnum);
        }
    }
    if ($gotlock eq 'ok') {
        my %currids;
        if ($context eq 'domain') {
            %currids = &Apache::lonnet::dump_dom('linkprot',$cdom);
        } else {
            %currids  = &Apache::lonnet::dump('lti',$cdom,$cnum,undef,undef,undef,1);
        }
        if ($currids{'lock'}) {
            delete($currids{'lock'});
            if (keys(%currids)) {
                my @curr = sort { $a <=> $b } keys(%currids);
                if ($curr[-1] =~ /^\d+$/) {
                    $id = 1 + $curr[-1];
                } else {
                    $id = 1;
                }
            } else {
                $id = 1;
            }
            if ($id) {
                if ($context eq 'domain') {
                     unless (&Apache::lonnet::newput_dom('linkprot',{ $id => $name },$cdom) eq 'ok') {
                         $error = 'nostore';
                     }
                } else {
                    unless (&Apache::lonnet::newput('lti',{ $id => $name },$cdom,$cnum) eq 'ok') {
                        $error = 'nostore';
                    }
                }
            } else {
                $error = 'nonumber';
            }
        }
        my $dellockoutcome;
        if ($context eq 'domain') {
            $dellockoutcome = &Apache::lonnet::del_dom('linkprot',['lock'],$cdom);
        } else {
            $dellockoutcome = &Apache::lonnet::del('lti',['lock'],$cdom,$cnum);
        }
    } else {
        $error = 'nolock';
    }
    return ($id,$error);
}

sub get_credentials {
    my ($cdom,$cnum,$type,$context) = @_;
    my ($cipher,$privnum,$home);
    my %domdefs = &Apache::lonnet::get_domain_defaults($cdom);
    my @ids=&Apache::lonnet::current_machine_ids();
    if ($context eq 'domain') {
        $home = &Apache::lonnet::domain($cdom,'primary');
    } else {
        $home = &Apache::lonnet::homeserver($cnum,$cdom);
    }
    my ($hostskey,$domkey,$crskey);
    if ($type eq 'ltitools') {
        $hostskey = 'toolprivhosts';
        $domkey = 'toolenc_dom';
        $crskey = 'toolenc_crs';
    } else {
        $hostskey = 'ltiprivhosts';
        $domkey = 'linkprotenc_dom';
        $crskey = 'linkprotenc_crs';
    }
    if ((($context eq 'domain') && ($domdefs{$domkey})) ||
        (($context eq 'course') && ($domdefs{$crskey}))) {
        unless (($home eq 'no_host') || ($home eq '')) {
            if (grep(/^\Q$home\E$/,@ids)) {
                if (ref($domdefs{$hostskey}) eq 'ARRAY') {
                    if (grep(/^\Q$home\E$/,@{$domdefs{$hostskey}})) {
                        my %privhash  = &Apache::lonnet::restore_dom($type,'private',$cdom,$home,1);
                        my $privkey = $privhash{'key'};
                        $privnum = $privhash{'version'};
                        if (($privnum) && ($privkey ne '')) {
                            $cipher = Crypt::CBC->new({'key'     => $privkey,
                                                       'cipher'  => 'DES'});
                        }
                    }
                }
            }
        }
    }
    return ($cipher,$privnum);
}

sub process_ltitools {
    my ($r,$cdom,$cnum,$values,$changes,$context,$lastactref,$configuserok,$lonhost,
        $author_ok,$confname) = @_;
    my (%currconfig,$newid,@allpos,%changes,%ltitools,$errors);

    my (%posslti,%possfield);
    my @courseroles = ('cc','in','ta','ep','st');
    my @ltiroles = qw(Instructor ContentDeveloper TeachingAssistant Learner);
    map { $posslti{$_} = 1; } @ltiroles;
    my @allfields = ('fullname','firstname','lastname','email','user','roles');
    map { $possfield{$_} = 1; } @allfields;

    my ($dest,$privnum,$cipher);

    ($cipher,$privnum) = &get_credentials($cdom,$cnum,'ltitools',$context);
    if ($context eq 'domain') {
        $dest = '/adm/domainprefs';
    } else {
        $dest = '/adm/courseprefs';
    }
    my $switchserver = &check_switchserver($cdom,$cnum,$context,$dest);

    my (@allpos,@items,%deletions,%itemids,%haschanges);
    if ($env{'form.ltitools_add'}) {
        my $title = $env{'form.ltitools_add_title'};
        $title =~ s/(`)/'/g;
        my ($newid,$error) = &Apache::lonnet::get_ltitools_id($context,$cdom,$cnum,$title);
        if ($newid) {
            my $position = $env{'form.ltitools_add_pos'};
            $position =~ s/\D+//g;
            if ($position ne '') {
                $allpos[$position] = $newid;
            }
            $haschanges{$newid} = 1;
            foreach my $item ('title','url','lifetime') {
                $env{'form.ltitools_add_'.$item} =~ s/(`)/'/g;
                if ($item eq 'lifetime') {
                    $env{'form.ltitools_add_'.$item} =~ s/[^\d.]//g;
                }
                if ($env{'form.ltitools_add_'.$item}) {
                    $ltitools{$newid}{$item} = $env{'form.ltitools_add_'.$item};
                }
            }
            if ($env{'form.ltitools_add_version'} eq 'LTI-1p0') {
                $ltitools{$newid}{'version'} = $env{'form.ltitools_add_version'};
            }
            if ($env{'form.ltitools_add_msgtype'} eq 'basic-lti-launch-request') {
                $ltitools{$newid}{'msgtype'} = $env{'form.ltitools_add_msgtype'};
            }
            if ($env{'form.ltitools_add_sigmethod'} eq 'HMAC-SHA256') {
                $ltitools{$newid}{'sigmethod'} = $env{'form.ltitools_add_sigmethod'};
            } else {
                $ltitools{$newid}{'sigmethod'} = 'HMAC-SHA1';
            }
            foreach my $item ('width','height','linktext','explanation') {
                $env{'form.ltitools_add_'.$item} =~ s/^\s+//;
                $env{'form.ltitools_add_'.$item} =~ s/\s+$//;
                if (($item eq 'width') || ($item eq 'height')) {
                    if ($env{'form.ltitools_add_'.$item} =~ /^\d+$/) {
                        $ltitools{$newid}{'display'}{$item} = $env{'form.ltitools_add_'.$item};
                    }
                } else {
                    if ($env{'form.ltitools_add_'.$item} ne '') {
                        $ltitools{$newid}{'display'}{$item} = $env{'form.ltitools_add_'.$item};
                    }
                }
            }
            if ($env{'form.ltitools_add_target'} eq 'window') {
                $ltitools{$newid}{'display'}{'target'} = $env{'form.ltitools_add_target'};
            } elsif ($env{'form.ltitools_add_target'} eq 'tab') {
                $ltitools{$newid}{'display'}{'target'} = $env{'form.ltitools_add_target'};
            } else {
                $ltitools{$newid}{'display'}{'target'} = 'iframe';
            }
            foreach my $item ('passback','roster') {
                if ($env{'form.ltitools_'.$item.'_add'}) {
                    $ltitools{$newid}{$item} = 1;
                    if ($env{'form.ltitools_'.$item.'valid_add'} ne '') {
                        my $lifetime = $env{'form.ltitools_'.$item.'valid_add'};
                        $lifetime =~ s/^\s+|\s+$//g;
                        if ($lifetime =~ /^\d+\.?\d*$/) {
                            $ltitools{$newid}{$item.'valid'} = $lifetime;
                        }
                    }
                }
            }
            if ($env{'form.ltitools_add_image.filename'} ne '') {
                my ($imageurl,$error) =
                    &process_ltitools_image($r,$context,$cdom,$cnum,$confname,'ltitools_add_image',
                                            $newid,$configuserok,$lonhost,$author_ok);
                if ($imageurl) {
                    $ltitools{$newid}{'image'} = $imageurl;
                }
                if ($error) {
                    &Apache::lonnet::logthis($error);
                    $errors .= '<li><span class="LC_error">'.$error.'</span></li>';
                }
            }
            my @fields = &Apache::loncommon::get_env_multiple('form.ltitools_add_fields');
            foreach my $field (@fields) {
                if ($possfield{$field}) {
                    if ($field eq 'roles') {
                        foreach my $role (@courseroles) {
                            my $choice = $env{'form.ltitools_add_roles_'.$role};
                            if (($choice ne '') && ($posslti{$choice})) {
                                $ltitools{$newid}{'roles'}{$role} = $choice;
                                if ($role eq 'cc') {
                                    $ltitools{$newid}{'roles'}{'co'} = $choice;
                                }
                            }
                        }
                    } else {
                        $ltitools{$newid}{'fields'}{$field} = 1;
                    }
                }
            }
            if (ref($ltitools{$newid}{'fields'}) eq 'HASH') {
                if ($ltitools{$newid}{'fields'}{'user'}) {
                    if ($env{'form.ltitools_add_userincdom'}) {
                        $ltitools{$newid}{'incdom'} = 1;
                    }
                }
            }
            my @courseconfig = &Apache::loncommon::get_env_multiple('form.ltitools_add_courseconfig');
            foreach my $item (@courseconfig) {
                $ltitools{$newid}{'crsconf'}{$item} = 1;
            }
            if ($env{'form.ltitools_add_custom'}) {
                my $name = $env{'form.ltitools_add_custom_name'};
                my $value = $env{'form.ltitools_add_custom_value'};
                $value =~ s/(`)/'/g;
                $name =~ s/(`)/'/g;
                $ltitools{$newid}{'custom'}{$name} = $value;
            }
            unless ($switchserver) {
                my $keyitem = 'form.ltitools_add_key';
                $env{$keyitem} =~ s/(`)/'/g;
                if ($env{$keyitem} ne '') {
                    $ltitools{$newid}{'key'} = $env{$keyitem};
                }
                my $secretitem = 'form.ltitools_secret_add';
                $env{$secretitem} =~ s/(`)/'/g;
                if ($env{$secretitem} ne '') {
                    if ($privnum && $cipher) {
                        $ltitools{$newid}{'secret'} = $cipher->encrypt_hex($env{$secretitem});
                        $ltitools{$newid}{'cipher'} = $privnum;
                    } else {
                        $ltitools{$newid}{'secret'} = $env{$secretitem};
                    }
                }
            }
        } else {
            $errors .= '<li><span class="LC_error">'.
                       &mt('Failed to acquire unique ID for new external tool').
                       '</span></li>';
        }
    }
    if (ref($values) eq 'HASH') {
        my %deletions;
        my @todelete = &Apache::loncommon::get_env_multiple('form.ltitools_del');
        if (@todelete) {
            map { $deletions{$_} = 1; } @todelete;
        }
        my %customadds;
        my @newcustom = &Apache::loncommon::get_env_multiple('form.ltitools_customadd');
        if (@newcustom) {
            map { $customadds{$_} = 1; } @newcustom;
        }
        my %imgdeletions;
        my @todeleteimages = &Apache::loncommon::get_env_multiple('form.ltitools_image_del');
        if (@todeleteimages) {
            map { $imgdeletions{$_} = 1; } @todeleteimages;
        }
        my $maxnum = $env{'form.ltitools_maxnum'};
        for (my $i=0; $i<=$maxnum; $i++) {
            my $itemid = $env{'form.ltitools_id_'.$i};
            $itemid =~ s/\D+//g;
            if (ref($values->{$itemid}) eq 'HASH') {
                if ($deletions{$itemid}) {
                    if ($values->{$itemid}{'image'}) {
                        #FIXME need to obsolete item in RES space
                    }
                    $haschanges{$itemid} = $values->{$itemid}{'title'};
                    next;
                } else {
                    my $newpos = $env{'form.ltitools_'.$itemid};
                    $newpos =~ s/\D+//g;
                    foreach my $item ('title','url','lifetime') {
                        $ltitools{$itemid}{$item} = $env{'form.ltitools_'.$item.'_'.$i};
                        if ($values->{$itemid}{$item} ne $ltitools{$itemid}{$item}) {
                            $haschanges{$itemid} = 1;
                        }
                    }
                    if ($env{'form.ltitools_version_'.$i} eq 'LTI-1p0') {
                        $ltitools{$itemid}{'version'} = $env{'form.ltitools_version_'.$i};
                    }
                    if ($env{'form.ltitools_msgtype_'.$i} eq 'basic-lti-launch-request') {
                        $ltitools{$itemid}{'msgtype'} = $env{'form.ltitools_msgtype_'.$i};
                    }
                    if ($env{'form.ltitools_sigmethod_'.$i} eq 'HMAC-SHA256') {
                        $ltitools{$itemid}{'sigmethod'} = $env{'form.ltitools_sigmethod_'.$i};
                    } else {
                        $ltitools{$itemid}{'sigmethod'} = 'HMAC-SHA1';
                    }
                    if ($values->{$itemid}{'sigmethod'} eq '') {
                        if ($ltitools{$itemid}{'sigmethod'} ne 'HMAC-SHA1') {
                            $haschanges{$itemid} = 1;
                        }
                    } elsif ($values->{$itemid}{'sigmethod'} ne $ltitools{$itemid}{'sigmethod'}) {
                        $haschanges{$itemid} = 1;
                    }
                    foreach my $size ('width','height') {
                        $env{'form.ltitools_'.$size.'_'.$i} =~ s/^\s+//;
                        $env{'form.ltitools_'.$size.'_'.$i} =~ s/\s+$//;
                        if ($env{'form.ltitools_'.$size.'_'.$i} =~ /^\d+$/) {
                            $ltitools{$itemid}{'display'}{$size} = $env{'form.ltitools_'.$size.'_'.$i};
                            if (ref($values->{$itemid}{'display'}) eq 'HASH') {
                                if ($values->{$itemid}{'display'}{$size} ne $ltitools{$itemid}{'display'}{$size}) {
                                    $haschanges{$itemid} = 1;
                                }
                            } else {
                                $haschanges{$itemid} = 1;
                            }
                        } elsif (ref($values->{$itemid}{'display'}) eq 'HASH') {
                            if ($values->{$itemid}{'display'}{$size} ne '') {
                                $haschanges{$itemid} = 1;
                            }
                        }
                    }
                    foreach my $item ('linktext','explanation') {
                        $env{'form.ltitools_'.$item.'_'.$i} =~ s/^\s+//;
                        $env{'form.ltitools_'.$item.'_'.$i} =~ s/\s+$//;
                        if ($env{'form.ltitools_'.$item.'_'.$i} ne '') {
                            $ltitools{$itemid}{'display'}{$item} = $env{'form.ltitools_'.$item.'_'.$i};
                            if (ref($values->{$itemid}{'display'}) eq 'HASH') {
                                if ($values->{$itemid}{'display'}{$item} ne $ltitools{$itemid}{'display'}{$item}) {
                                    $haschanges{$itemid} = 1;
                                }
                            } else {
                                $haschanges{$itemid} = 1;
                            }
                        } elsif (ref($values->{$itemid}{'display'}) eq 'HASH') {
                            if ($values->{$itemid}{'display'}{$item} ne '') {
                                $haschanges{$itemid} = 1;
                            }
                        }
                    }
                    if ($env{'form.ltitools_target_'.$i} eq 'window') {
                        $ltitools{$itemid}{'display'}{'target'} = $env{'form.ltitools_target_'.$i};
                    } elsif ($env{'form.ltitools_target_'.$i} eq 'tab') {
                        $ltitools{$itemid}{'display'}{'target'} = $env{'form.ltitools_target_'.$i};
                    } else {
                        $ltitools{$itemid}{'display'}{'target'} = 'iframe';
                    }
                    if (ref($values->{$itemid}{'display'}) eq 'HASH') {
                        if ($values->{$itemid}{'display'}{'target'} ne $ltitools{$itemid}{'display'}{'target'}) {
                            $haschanges{$itemid} = 1;
                        }
                    } else {
                        $haschanges{$itemid} = 1;
                    }
                    foreach my $extra ('passback','roster') {
                        if ($env{'form.ltitools_'.$extra.'_'.$i}) {
                            $ltitools{$itemid}{$extra} = 1;
                            if ($env{'form.ltitools_'.$extra.'valid_'.$i} ne '') {
                                my $lifetime = $env{'form.ltitools_'.$extra.'valid_'.$i};
                                $lifetime =~ s/^\s+|\s+$//g;
                                if ($lifetime =~ /^\d+\.?\d*$/) {
                                    $ltitools{$itemid}{$extra.'valid'} = $lifetime;
                                }
                            }
                        }
                        if ($values->{$itemid}{$extra} ne $ltitools{$itemid}{$extra}) {
                            $haschanges{$itemid} = 1;
                        }
                        if ($values->{$itemid}{$extra.'valid'} ne $ltitools{$itemid}{$extra.'valid'}) {
                            $haschanges{$itemid} = 1;
                        }
                    }
                    my @courseconfig = &Apache::loncommon::get_env_multiple('form.ltitools_courseconfig_'.$i);
                    foreach my $item ('label','title','target','linktext','explanation','append') {
                        if (grep(/^\Q$item\E$/,@courseconfig)) {
                            $ltitools{$itemid}{'crsconf'}{$item} = 1;
                            if (ref($values->{$itemid}{'crsconf'}) eq 'HASH') {
                                if ($values->{$itemid}{'crsconf'}{$item} ne $ltitools{$itemid}{'crsconf'}{$item}) {
                                    $haschanges{$itemid} = 1;
                                }
                            } else {
                                $haschanges{$itemid} = 1;
                            }
                        }
                    }
                    my @fields = &Apache::loncommon::get_env_multiple('form.ltitools_fields_'.$i);
                    foreach my $field (@fields) {
                        if ($possfield{$field}) {
                            if ($field eq 'roles') {
                                foreach my $role (@courseroles) {
                                    my $choice = $env{'form.ltitools_roles_'.$role.'_'.$i};
                                    if (($choice ne '') && ($posslti{$choice})) {
                                        $ltitools{$itemid}{'roles'}{$role} = $choice;
                                        if ($role eq 'cc') {
                                            $ltitools{$itemid}{'roles'}{'co'} = $choice;
                                        }
                                    }
                                    if (ref($values->{$itemid}{'roles'}) eq 'HASH') {
                                        if ($values->{$itemid}{'roles'}{$role} ne $ltitools{$itemid}{'roles'}{$role}) {
                                            $haschanges{$itemid} = 1;
                                        }
                                    } elsif ($ltitools{$itemid}{'roles'}{$role}) {
                                        $haschanges{$itemid} = 1;
                                    }
                                }
                            } else {
                                $ltitools{$itemid}{'fields'}{$field} = 1;
                                if (ref($values->{$itemid}{'fields'}) eq 'HASH') {
                                    if ($values->{$itemid}{'fields'}{$field} ne $ltitools{$itemid}{'fields'}{$field}) {
                                        $haschanges{$itemid} = 1;
                                    }
                                } else {
                                    $haschanges{$itemid} = 1;
                                }
                            }
                        }
                    }
                    if (ref($ltitools{$itemid}{'fields'}) eq 'HASH') {
                        if ($ltitools{$itemid}{'fields'}{'user'}) {
                            if ($env{'form.ltitools_userincdom_'.$i}) {
                                $ltitools{$itemid}{'incdom'} = 1;
                            }
                            if ($values->{$itemid}{'incdom'} ne $ltitools{$itemid}{'incdom'}) {
                                $haschanges{$itemid} = 1;
                            }
                        }
                    }
                    $allpos[$newpos] = $itemid;
                }
                if ($imgdeletions{$itemid}) {
                    $haschanges{$itemid} = 1;
                    if ($context eq 'course') {
                        my $currimgurl = $values->{$itemid}{'image'};
                        if ($currimgurl =~ m{^(\Q/uploaded/$cdom/$cnum/toollogo/$itemid\E)/([^/]+)$}) {
                            my ($path,$imagefile) = ($1,$2);
                            if ($imagefile =~ /^tn\-(.+)$/) {
                                my $origimg = $1;
                                &Apache::lonnet::removeuploadedurl("$path/$origimg");
                            }
                            &Apache::lonnet::removeuploadedurl($currimgurl);
                        }
                    }
                    #FIXME need to obsolete item in RES space
                } elsif ($env{'form.ltitools_image_'.$i.'.filename'}) {
                    my $currimgurl = $values->{$itemid}{'image'};
                    my ($imgurl,$error) = &process_ltitools_image($r,$context,$cdom,$cnum,$confname,'ltitools_image_'.$i,
                                                                 $itemid,$configuserok,$lonhost,$author_ok,$currimgurl);
                    if ($imgurl) {
                        $ltitools{$itemid}{'image'} = $imgurl;
                        $haschanges{$itemid} = 1;
                    }
                    if ($error) {
                        &Apache::lonnet::logthis($error);
                        $errors .= '<li><span class="LC_error">'.$error.'</span></li>';
                    }
                } elsif ($values->{$itemid}{'image'}) {
                    $ltitools{$itemid}{'image'} = $values->{$itemid}{'image'};
                }
                if ($customadds{$i}) {
                    my $name = $env{'form.ltitools_custom_name_'.$i};
                    $name =~ s/(`)/'/g;
                    $name =~ s/^\s+//;
                    $name =~ s/\s+$//;
                    my $value = $env{'form.ltitools_custom_value_'.$i};
                    $value =~ s/(`)/'/g;
                    $value =~ s/^\s+//;
                    $value =~ s/\s+$//;
                    if ($name ne '') {
                        $ltitools{$itemid}{'custom'}{$name} = $value;
                        $haschanges{$itemid} = 1;
                    }
                }
                my %customdels;
                my @customdeletions = &Apache::loncommon::get_env_multiple('form.ltitools_customdel_'.$i);
                if (@customdeletions) {
                    $haschanges{$itemid} = 1;
                }
                map { $customdels{$_} = 1; } @customdeletions;
                if (ref($values->{$itemid}{'custom'}) eq 'HASH') {
                    foreach my $key (keys(%{$values->{$itemid}{'custom'}})) {
                        unless ($customdels{$key}) {
                            if ($env{'form.ltitools_customval_'.$key.'_'.$i} ne '') {
                                $ltitools{$itemid}{'custom'}{$key} = $env{'form.ltitools_customval_'.$key.'_'.$i};
                            }
                            if ($values->{$itemid}{'custom'}{$key} ne $env{'form.ltitools_customval_'.$key.'_'.$i}) {
                                $haschanges{$itemid} = 1;
                            }
                        }
                    }
                }
                unless ($switchserver) {
                    my $keyitem = 'form.ltitools_key_'.$i;
                    $env{$keyitem} =~ s/(`)/'/g;
                    if ($values->{$itemid}{'key'} ne $env{$keyitem}) {
                        $haschanges{$itemid} = 1;
                    }
                    if ($env{$keyitem} ne '') {
                        $ltitools{$itemid}{'key'} = $env{$keyitem};
                    }
                    my $secretitem = 'form.ltitools_secret_'.$i;
                    $env{$secretitem} =~ s/(`)/'/g;
                    if ($values->{$itemid}{'usable'}) {
                        if ($env{'form.ltitools_changesecret_'.$i}) {
                            if ($env{$secretitem} ne '') {
                                if ($privnum && $cipher) {
                                    $ltitools{$itemid}{'secret'} = $cipher->encrypt_hex($env{$secretitem});
                                    $ltitools{$itemid}{'cipher'} = $privnum;
                                } else {
                                    $ltitools{$itemid}{'secret'} = $env{$secretitem};
                                }
                                $haschanges{$itemid} = 1;
                            }
                        } else {
                            $ltitools{$itemid}{'secret'} = $values->{$itemid}{'secret'};
                            $ltitools{$itemid}{'cipher'} = $values->{$itemid}{'cipher'};
                        }
                    } elsif ($env{$secretitem} ne '') {
                        if ($privnum && $cipher) {
                            $ltitools{$itemid}{'secret'} = $cipher->encrypt_hex($env{$secretitem});
                            $ltitools{$itemid}{'cipher'} = $privnum;
                        } else {
                            $ltitools{$itemid}{'secret'} = $env{$secretitem};
                        }
                        $haschanges{$itemid} = 1;
                    }
                }
                unless ($haschanges{$itemid}) {
                    foreach my $key (keys(%{$values->{$itemid}})) {
                        if (ref($values->{$itemid}{$key}) eq 'HASH') {
                            if (ref($ltitools{$itemid}{$key}) eq 'HASH') {
                                foreach my $innerkey (keys(%{$values->{$itemid}{$key}})) {
                                    unless (exists($ltitools{$itemid}{$key}{$innerkey})) {
                                        $haschanges{$itemid} = 1;
                                        last;
                                    }
                                }
                            } elsif (keys(%{$values->{$itemid}{$key}}) > 0) {
                                $haschanges{$itemid} = 1;
                            }
                        }
                        last if ($haschanges{$itemid});
                    }
                }
            }
        }
    }
    if (@allpos > 0) {
        my $idx = 0;
        foreach my $itemid (@allpos) {
            if ($itemid ne '') {
                $ltitools{$itemid}{'order'} = $idx;
                if (ref($values) eq 'HASH') {
                    if (ref($values->{$itemid}) eq 'HASH') {
                        if ($values->{$itemid}{'order'} ne $idx) {
                            $haschanges{$itemid} = 1;
                        }
                    }
                }
                $idx ++;
            }
        }
    }
    if (keys(%haschanges)) {
        foreach my $entry (keys(%haschanges)) {
            $changes->{$entry} = $ltitools{$entry};
        }
        if (ref($lastactref) eq 'HASH') {
            $lastactref->{'courseltitools'} = 1;
        }
    }
    return $errors;
}

sub process_ltitools_image {
    my ($r,$context,$dom,$cnum,$confname,$caller,$itemid,$configuserok,$switch,$author_ok,$currimg) = @_;
    my $filename = $env{'form.'.$caller.'.filename'};
    my ($error,$url);
    my ($width,$height) = (21,21);
    if ($configuserok eq 'ok') {
        if ($switch) {
            $error = &mt('Upload of Tool Provider (LTI) icon is not permitted to this server: [_1]',
                         $switch);
        } elsif ($author_ok eq 'ok') {
            my ($result,$imageurl,$madethumb);
            if ($context eq 'domain') {
                ($result,$imageurl,$madethumb) =
                    &Apache::lonconfigsettings::publishlogo($r,'upload',$caller,$dom,$confname,
                                                            "ltitools/$itemid/icon",$width,$height);
            } else {
                ($result,$imageurl,$madethumb) = &processlogo($dom,$cnum,$caller,$currimg,$itemid,$width,$height);
            }
            if ($result eq 'ok') {
                if ($madethumb) {
                    my ($path,$imagefile) = ($imageurl =~ m{^(.+)/([^/]+)$});
                    my $imagethumb = "$path/tn-".$imagefile;
                    $url = $imagethumb;
                } else {
                    $url = $imageurl;
                }
            } else {
                if ($context eq 'domain') {
                    $error = &mt("Upload of [_1] failed because an error occurred publishing the file in RES space. Error was: [_2].",$filename,$result);
                } else {
                    $error = &mt("Upload of [_1] failed because an error occurred. Error was: [_2].",$filename,$result);
                }
            }
        } else {
            $error = &mt("Upload of [_1] failed because an author role could not be assigned to a Domain Configuration user ([_2]) in domain: [_3].  Error was: [_4].",$filename,$confname,$dom,$author_ok);
        }
    } else {
        $error = &mt("Upload of [_1] failed because a Domain Configuration user ([_2]) could not be created in domain: [_3].  Error was: [_4].",$filename,$confname,$dom,$configuserok);
    }
    return ($url,$error);
}

sub processlogo {
    my ($dom,$cnum,$caller,$currimg,$itemid,$width,$height) = @_;
    my ($result,$imageurl,$madethumb);
    if ($env{"form.$caller.filename"} ne '') {
        unless ($caller eq 'ltitools_add_image') {
            if ($currimg =~ m{^(\Q/uploaded/$dom/$cnum/toollogo/$itemid\E)/([^/]+)$}) {
                my ($path,$imagefile) = ($1,$2);
                if ($imagefile =~ /^tn\-(.+)$/) {
                     my $origimg = $1;
                     &Apache::lonnet::removeuploadedurl("$path/$origimg");
                }
                &Apache::lonnet::removeuploadedurl($currimg);
            }
        }
        $imageurl = &Apache::lonnet::userfileupload($caller,'toollogo',"toollogo/$itemid",
                                                    '','','',$cnum,$dom,$width,$height);
        if ($imageurl =~ m{^(\Q/uploaded/$dom/$cnum/toollogo/$itemid\E)/([^/]+)$}) {
            my ($path,$imagefile) = ($1,$2);
            $result = 'ok';
            my $thumburl = "$path/tn-".$imagefile;
            my ($rtncode,$info);
            my $res = &Apache::lonnet::getuploaded('HEAD',$thumburl,$dom,$cnum,\$info,\$rtncode);
            if ($res eq 'ok') {
                $madethumb = 1;
            }
        } elsif ($imageurl eq '/adm/notfound.html') {
            undef($imageurl);
            $result = 'store failed';
        } elsif ($imageurl =~ /^error: (.+)$/) {
            $result = $1;
        }
    }
    return ($result,$imageurl,$madethumb);
}

sub get_sec_str {
    my ($entry,$num) = @_;
    my @secs = &Apache::loncommon::get_env_multiple('form.'.$entry.'_sections_'.$num);
    my $secstr;
    if (grep(/^\s*$/,@secs)) {
        $secstr = '';
    } elsif (@secs > 0) {
        $secstr = join(';',@secs);
    }
    if ($secstr ne '') {
        return '('.$secstr.')';
    }
    return;
}

sub check_clone {
    my ($clonedom,$disallowed,$clonename) = @_;
    return if (ref($disallowed) ne 'HASH');
    if ($clonedom !~ /^$match_domain$/) {
        $disallowed->{'cloners'}{'format'} .= $clonedom.',';
        return;
    } elsif (!&Apache::lonnet::domain($clonedom)) {
        $disallowed->{'cloners'}{'domain'} .= $clonedom.',';
        return;
    }
    if ($clonename ne '') {
        if ($clonename !~ /^$match_username$/) {
            $disallowed->{'cloners'}{'format'} .= $clonename.':'.$clonedom.',';
            return;
        } else {
            if (&Apache::lonnet::homeserver($clonename,$clonedom) eq 'no_host') {
                $disallowed->{'cloners'}{'newuser'} .= $clonename.':'.$clonedom.',';
                return;
            }
        }
    }
    return 'ok';
}

sub store_changes {
    my ($cdom,$cnum,$prefs_order,$actions,$prefs,$values,$changes,$crstype) = @_;
    my ($chome,$output);
    my (%storehash,@delkeys,@need_env_update,@oldcloner,%oldlinkprot,%oldltitools);
    if ((ref($values) eq 'HASH') && (ref($changes) eq 'HASH')) {
        if (ref($values->{'linkprot'}) eq 'HASH') {
            %oldlinkprot = %{$values->{'linkprot'}};
        }
        delete($values->{'linkprot'});
        if (ref($values->{'ltitools'}) eq 'HASH') {
            %oldltitools = %{$values->{'ltitools'}};
        }
        %storehash = %{$values};
    } else {
        if ($crstype eq 'Community') {
            $output = &mt('No changes made to community settings.');
        } else {
            $output = &mt('No changes made to course settings.');
        }
        return $output;
    }
    my ($numchanges,$skipstore);
    if (ref($changes) eq 'HASH') {
        $numchanges = scalar(keys(%{$changes}));
        if (($numchanges == 1) && (exists($changes->{'linkprot'}))) {
            $skipstore = 1;
        } elsif (($numchanges == 1) && (exists($changes->{'ltitools'}))) {
            $skipstore = 1;
        } elsif (!$numchanges) {
            if ($crstype eq 'Community') {
                $output = &mt('No changes made to community settings.');
            } else {
                $output = &mt('No changes made to course settings.');
            }
            return $output;
        }
    }
    my %yesno = (
                 hidefromcat           => '1',
                 problem_stream_switch => '1',
                 suppress_tries        => '1',
                 disableexampointprint => '1',
                 hideemptyrows         => '1',
                 suppress_embed_prompt => '1',
                );
    foreach my $item (@{$prefs_order}) {
        if (grep(/^\Q$item\E$/,@{$actions})) {
            $output .= '<h3>'.&mt($prefs->{$item}{'text'}).'</h3>';
            if (ref($changes->{$item}) eq 'HASH') {
                if (keys(%{$changes->{$item}}) > 0) {
                    $output .= &mt('Changes made:').'<ul style="list-style:none;">';
                    if ($item eq 'other') {
                        foreach my $key (sort(keys(%{$changes->{$item}}))) {
                            $storehash{$key} = $changes->{$item}{$key};
                            if ($changes->{$item}{$key} eq '') {
                                push(@delkeys,$key);
                                $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('Deleted setting for [_1]','<i>'.$key.'</i>')).'</li>';
                            } else {
                                $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('[_1] set to [_2]','<i>'.$key.'</i>',
                                           "'$storehash{$key}'")).'</li>';
                            }
                        }
                    } elsif ($item eq 'linkprot') {
                        $output .= &store_linkprot($cdom,$cnum,'course',$changes->{$item},\%oldlinkprot);
                    } elsif ($item eq 'ltitools') {
                        $output .= &store_ltitools($cdom,$cnum,'course',$changes->{$item},\%oldltitools);
                    } else {
                        if (ref($prefs->{$item}->{'ordered'}) eq 'ARRAY') {
                            my @settings = @{$prefs->{$item}->{'ordered'}};
                            if ($item eq 'feedback') {
                                push(@settings,(map { $_.'.text'; } @settings));
                            }
                            foreach my $key (@settings) {
                                if ($key eq 'rolenames') {
                                    my $displayname = $prefs->{$item}->{'itemtext'}{$key};
                                    my $msg;
                                    my @roles;
                                    if ($crstype eq 'Community') {
                                        @roles = ('co');
                                    } else {
                                        @roles = ('cc');
                                    }
                                    push(@roles,('in','ta','ep','ad','st'));
                                    foreach my $role (@roles) {
                                        next if (!exists($changes->{$item}{$key.'_'.$role}));
                                        my $stdname = &Apache::lonnet::plaintext($role,$crstype,undef,1);
                                        my $newname = $changes->{$item}{$key.'_'.$role};
                                        $storehash{$role.'.plaintext'} = $newname;
                                        if ($newname eq '') {
                                            $newname = $stdname;
                                        }
                                        $msg .= '<li>'.&mt('[_1] set to [_2]','<i>'.$stdname.'</i>',
                                                "'<b>".$newname."</b>'").'</li>';
                                    }
                                    if ($msg ne '') {
                                        $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt($displayname)).'<ul class="LC_success">'.$msg.'</ul></li>';
                                    }
                                } elsif ($key eq 'timezone') {
                                    next unless ((exists($changes->{$item}{$key})) || (exists($changes->{$item}{'tzover'})));
                                    my ($displayname,$text);
                                    $text = $prefs->{$item}->{'itemtext'}{$key};
                                    my $displayval;
                                    if (exists($changes->{$item}{$key})) {
                                        $displayname = &mt($text);
                                        $storehash{$key} = $changes->{$item}{$key};
                                        if ($changes->{$item}{$key} ne '') {
                                            $displayval = '<b>'.$changes->{$item}{$key}.'</b>';
                                        } else {
                                            push(@delkeys,$key);
                                            if (exists($values->{'tzover'})) {
                                                push(@delkeys,'tzover');
                                            }
                                            $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('Deleted setting for [_1]',
                                                                                                      '<i>'.$displayname.'</i>')).'</li>';
                                        }
                                    }
                                    unless (grep(/^\Q$key\E$/,@delkeys)) {
                                        if (exists($changes->{$item}{'tzover'})) {
                                            $storehash{'tzover'} = $changes->{$item}{'tzover'};
                                            my $tzovertext;
                                            if ($changes->{$item}{'tzover'} ne '') {
                                                $tzovertext = &mt('Course Time Zone overrides individual user preference');
                                            } else {
                                                push(@delkeys,'tzover');
                                                $tzovertext = &mt('Course Time Zone does not override individual user preference');
                                            }
                                            if ($displayval eq '') {
                                                $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success($tzovertext).'</li>';
                                            } else {
                                                $displayval .= '<br />'.('&nbsp;'x5).$tzovertext;
                                            }
                                        }
                                        if ($displayval ne '') {
                                            $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('[_1] set to [_2]',
                                                              '<i>'.$displayname.'</i>',$displayval)).'</li>';
                                        }
                                    }
                                } else {
                                    next if (!exists($changes->{$item}{$key}));
                                    my ($displayname,$text);
                                    $text = $prefs->{$item}->{'itemtext'}{$key};
                                    my $displayval;
                                    unless (($key eq 'co-owners') || ($key eq 'discussion_post_fonts') || ($key eq 'extresource')) {
                                        $displayval = $changes->{$item}{$key};
                                    }
                                    if (($item eq 'grading') && ($key eq 'grading')) {
                                        if ($displayval eq 'standard') {
                                            my $hidetotals;
                                            if (exists($changes->{$item}{'hidetotals'})) {
                                                if ($changes->{$item}{'hidetotals'} eq '') {
                                                    if (exists($values->{'hidetotals'})) {
                                                        push(@delkeys,'hidetotals');
                                                    }
                                                } else {
                                                    $hidetotals = $changes->{$item}{'hidetotals'};
                                                }
                                            } elsif (exists($values->{'hidetotals'})) {
                                                $hidetotals = $values->{'hidetotals'};
                                            }
                                            if ($hidetotals eq '') {
                                                $displayval = &mt('standard with "hide course totals" set to "No"');
                                                if (exists($values->{'hidetotals'})) {
                                                    push(@delkeys,'hidetotals');
                                                }
                                            } elsif ($hidetotals =~ /^([\w,]+)$/) {
                                                my $secstr = $1;
                                                my @secs = split(/,/,$secstr);
                                                if (grep(/^all$/,@secs)) {
                                                    $displayval = &mt('standard with "hide course totals" set to "Yes" for all users');
                                                    $hidetotals = 'all';
                                                } else {
                                                    $displayval = &mt('standard with "hide course totals" set to "Yes" for users in section(s): [_1]',join(', ',@secs));
                                                }
                                                $storehash{'hidetotals'} = $hidetotals;
                                            }
                                        } elsif (exists($values->{'hidetotals'})) {
                                            push(@delkeys,'hidetotals');
                                        }
                                    }
                                    if ($item eq 'feedback') {
                                        if ($key =~ /^(question|policy|comment)(\.email)\.text$/) {
                                            $text = $prefs->{$item}->{'itemtext'}{$1.$2};
                                            $displayname = &mt('Custom text for '.$text.' questions');
                                        } else {
                                            $displayname = &mt('Recipients of '.$text.' questions');
                                        }
                                    } elsif ($item eq 'discussion') {
                                        if ($key =~ /^p(lc|ch)\.roles\.denied/) {
                                            $displayname = &mt("$text (role-based)");
                                            if ($displayval ne '') {
                                                my @roles = split(',',$displayval);
                                                @roles = map { &Apache::lonnet::plaintext($_); } @roles;
                                                $displayval = join(', ',@roles);
                                            } 
                                        } elsif ($key =~ /^p(lc|ch)\.users\.denied/) {
                                            $displayname = &mt("$text (specific user(s))");
                                        } else {
                                            if ($key eq 'allow_discussion_post_editing') {
                                                if ($displayval ne '') {
                                                    my @roles = split(',',$displayval);
                                                    my @longroles;
                                                    foreach my $role (@roles) {
                                                        my ($trole,$sec) = split(':',$role);
                                                        my $rolename = 
                                                            &Apache::lonnet::plaintext($trole);
                                                        if ($sec ne '') {
                                                            $rolename .= ':'.$sec;
                                                        }
                                                        push(@longroles,$rolename);
                                                    }
                                                    $displayval = join(', ',@longroles);
                                                }
                                            } elsif ($key eq 'discussion_post_fonts') {
                                                my ($classorder,$classtitles)=&discussion_vote_classes();
                                                my ($styleorder,$styleitems)=&discussion_vote_styles();
                                                my $count = 1;
                                                my $total = scalar(keys(%{$changes->{$item}}));
                                                foreach my $class (@{$classorder}) {
                                                    $count ++;
                                                    next unless ($changes->{$item}{$key.'_'.$class});
                                                    my @vals = split(/,/,$changes->{$item}{$key.'_'.$class});
                                                    my $showval = '';
                                                    for (my $i=0; $i<@{$styleorder}; $i++) {
                                                        if ($vals[$i] ne '') {
                                                            $showval .= 'font-'.$styleorder->[$i].': '.$vals[$i].'; ';
                                                        }
                                                    }
                                                    if ($vals[3] ne '') {
                                                        $showval .= $vals[3];
                                                    }
                                                    if ($showval ne '') {
                                                        $displayval .= $classtitles->{$class}.':{ '.
                                                                       $showval.'}';
                                                        $storehash{$key.'_'.$class} = $changes->{$item}{$key.'_'.$class};
                                                    } else {
                                                        $displayval .= $classtitles->{$class}.': '.&mt('None');
                                                        push(@delkeys,$key.'_'.$class);
                                                    }
                                                    unless ($count == $total) {
                                                        $displayval .= ('&nbsp;'x2);
                                                    }
                                                }
                                            }
                                            $displayname = &mt($text);
                                        }
                                    } elsif ($item eq 'spreadsheet') {
                                        if ($key =~ /^spreadsheet_default_(studentcalc|assesscalc)$/x) {
                                            my $sheettype = $1;
                                            if ($sheettype eq 'studentcalc') {
                                                &Apache::lonnet::expirespread('','','studentcalc');
                                            } else {
                                                &Apache::lonnet::expirespread('','','assesscalc');
                                                &Apache::lonnet::expirespread('','','studentcalc');
                                            }
                                        }
                                        $displayname = &mt($text);
                                    } elsif ($item eq 'lti') {
                                        if ($key eq 'lti.lcmenu') {
                                            if ($changes->{$item}{$key} eq 'none') {
                                                $displayval = &mt('None of the configurable menu items displayed');
                                            } else {
                                                my %ltititles = &ltimenu_titles();
                                                $displayval = join(', ', map { $ltititles{$_}; } split(/,/,$changes->{$item}{$key}));
                                            }
                                        } else {
                                            if ($changes->{$item}{$key} eq '1') {
                                                $displayval = &mt('Yes');
                                            } elsif ($changes->{$item}{$key} eq '') {
                                                $displayval = &mt('No');
                                            }
                                        }
                                        $displayname = &mt($text);
                                    } elsif ($item eq 'menuitems') {
                                        unless ($changes->{$item}{$key} eq '') {
                                            if ($key eq 'menudefault') {
                                                $displayname = &mt('Default collection of menu items');
                                                $displayval = &mt('Collection: [_1]',
                                                                  $changes->{$item}{$key});
                                            } elsif ($key eq 'menucollections') {
                                                $displayval = &menucollections_display($changes->{$item}{$key});
                                            }
                                        }
                                    } else {
                                        $displayname = &mt($text);
                                    }
                                    if (defined($yesno{$key})) {
                                        $displayval = &mt('No');
                                        if ($changes->{$item}{$key} eq 'yes') {
                                            $displayval = &mt('Yes');                          
                                        }
                                    } elsif (($key =~ /^default_enrollment_(start|end)_date$/) && ($displayval)) {
                                        $displayval = &Apache::lonlocal::locallocaltime($displayval);
                                    } elsif ($key eq 'categories') {
                                        $displayval = $env{'form.categories_display'};
                                    } elsif (($key eq 'canuse_pdfforms') || ($key eq 'usejsme') ||
                                             ($key eq 'uselcmath') || ($key eq 'inline_chem')) {
                                        if ($changes->{$item}{$key} eq '1') {
                                            $displayval = &mt('Yes');
                                        } elsif ($changes->{$item}{$key} eq '0') {
                                            $displayval = &mt('No');
                                        }
                                    } elsif ($key eq 'extresource') {
                                        if ($changes->{$item}{$key} eq 'iframe') {
                                            $displayval = &mt('In iframe');
                                        } else {
                                            my ($selected,$reuse,$width,$height) = split(/:/,$changes->{$item}{$key});
                                            if ($selected eq 'tab') {
                                                if ($reuse) {
                                                    $displayval = &mt('[_1]In tab[_2],[_3] and tab re-used for different external resources in course',
                                                                      "'<b>","</b>'",'<br />');
                                                } else {
                                                    $displayval = &mt('[_1]In tab[_2],[_3] with new tab for each external resource in course',
                                                                      "'<b>","</b>'",'<br />');
                                                }
                                            } elsif ($selected eq 'window') {
                                                 if ($reuse) {
                                                     $displayval = &mt('[_1]In pop-up window[_2],[_3] and window re-used for different external resources in course',
                                                                       "'<b>","</b>'",'<br />');
                                                 } else {
                                                     $displayval = &mt('[_1]In pop-up window[_2],[_3] with new window for each external resource in course',
                                                                       "'<b>","</b>'",'<br />');
                                                 }
                                                 if (($width ne '') || ($height ne '')) {
                                                     if ($width ne '') {
                                                         $displayval .= '<br />'.&mt('Window width: [_1]px',$width);
                                                     }
                                                     if ($height ne '') {
                                                         $displayval .= '<br />'.&mt('Window height: [_1]px',$height);
                                                     }
                                                 }
                                            }
                                        }
                                    }
                                    if ($key eq 'co-owners') {
                                        if (ref($changes->{$item}{$key}) eq 'HASH') {
                                            if (ref($changes->{$item}{$key}{'changed'}) eq 'ARRAY') {
                                                foreach my $type ('co-owners','pendingco-owners') {
                                                    next unless (grep(/^\Q$type\E$/,@{$changes->{$item}{$key}{'changed'}}));
                                                    if ($type eq 'pendingco-owners') {
                                                        if (&Apache::lonnet::is_course_owner($cdom,$cnum)) {
                                                            $displayname = &mt('Invited as co-owners, pending acceptance');
                                                        }
                                                    }
                                                    if ($changes->{$item}{$key}{$type} eq '') {
                                                        push(@delkeys,'internal.'.$type);
                                                        if (&Apache::lonnet::is_course_owner($cdom,$cnum)) {
                                                            $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('Deleted setting for [_1]',
                                                            '<i>'.$displayname.'</i>')).'</li>';
                                                        }
                                                    } elsif (&Apache::lonnet::is_course_owner($cdom,$cnum)) {
                                                        $displayval = join(', ',map { &Apache::loncommon::plainname(split(':',$_)); } split(',',$changes->{$item}{$key}{$type}));
                                                        $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('[_1] set to [_2]',
                                                                   '<i>'.$displayname.'</i>',
                                                                   "'<b>$displayval</b>'")).'</li>';
                                                    }
                                                }
                                            }
                                            unless (&Apache::lonnet::is_course_owner($cdom,$cnum)) {
                                                if ($env{'form.pending_coowner'} eq 'accept') {
                                                        $displayval = &mt('on');
                                                } elsif ($env{'form.pending_coowner'} eq 'decline') {
                                                        $displayval = '';
                                                        $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('Invitation to be co-owner declined')).'</li>';
                                                } elsif ($env{'form.remove_coowner'}) {
                                                    $displayval = &mt('off');
                                                }
                                                if ($displayval) {
                                                    $displayname = &mt('Your co-ownership status');
                                                    $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('[_1] set to [_2]',
                                                   '<i>'.$displayname.'</i>',
                                                   "'<b>$displayval</b>'")).'</li>';
                                                }
                                            }
                                        }
                                    } elsif ($changes->{$item}{$key} eq '') {
                                        push(@delkeys,$key);
                                        if ($item eq 'lti') {
                                            if (($key eq 'lti.override') || (($key ne 'lti.override') && ($env{'form.lti.override'} ne ''))) {
                                                if (($key eq 'lti.lcmenu') &&
                                                    ((!$env{'form.lti.topmenu'}) && (!$env{'form.lti.inlinemenu'}))) {
                                                    $output .= '<li>'.&mt('LTI settings for menu items only saved if page header and/or inline menu is set to be displayed').'</li>';
                                                } else {
                                                    $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('[_1] set to [_2]',
                                                               '<i>'.$displayname.'</i>',
                                                               "'<b>$displayval</b>'")).'</li>';
                                                }
                                            } elsif (!exists($changes->{$item}{'lti.override'})) {
                                                $output .= '<li>'.&mt('LTI settings only saved if Override is set to "Yes"').'</li>';
                                            }
                                        } elsif ($item eq 'menuitems') {
                                            if ($key eq 'menudefault') {
                                                $output .= '<li>'.&mt("Default collection of menu items set to: 'Standard' (all menus shown)").'</li>';
                                            } elsif ($key eq 'menucollections') {
                                                $output .= '<li>'.&mt('Specific collections of menus no longer available').'</li>';
                                            }
                                        } else {
                                            $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('Deleted setting for [_1]',
                                                       '<i>'.$displayname.'</i>')).'</li>';
                                        }
                                    } elsif ($key eq 'menucollections') {
                                        $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('Numbered menu collections:')).'<br />'.
                                                   $displayval.'</li>';
                                    } else {
                                        unless (($key eq 'extresource') && ($changes->{$item}{$key} ne 'iframe')) {
                                            $displayval = "'<b>$displayval</b>'";
                                        }
                                        $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('[_1] set to [_2]',
                                                   '<i>'.$displayname.'</i>',$displayval));
                                        if ($key eq 'url') {
                                            my $bkuptime=time;
                                            $output .= ('&nbsp;'x2).&mt('(Previous URL backed up)').': '.
                                            $storehash{'top level map backup '.$bkuptime} = $values->{$key};
                                        }
                                        $output .= '</li>';
                                    }
                                    if ($key eq 'co-owners') {
                                        if (ref($changes->{$item}{$key}) eq 'HASH') {
                                            if (ref($changes->{$item}{$key}{'changed'}) eq 'ARRAY') {
                                                foreach my $type ('co-owners','pendingco-owners') {
                                                    next unless (grep(/^\Q$type\E$/,@{$changes->{$item}{$key}{'changed'}}));
                                                    $storehash{'internal.'.$type} = $changes->{$item}{$key}{$type};
                                                }
                                            }
                                        }
                                    } else {
                                        unless ($key eq 'discussion_post_fonts') {
                                            $storehash{$key} = $changes->{$item}{$key};
                                        }
                                    }
                                }
                                if ($key eq 'cloners') {
                                    # Get existing cloners
                                    my %clonenames = 
                                        &Apache::lonnet::dump('environment',$cdom,$cnum,'cloners');
                                    if ($clonenames{'cloners'} =~ /,/) {
                                        @oldcloner = split(/\s*\,\s*/,$clonenames{'cloners'});
                                    } else {
                                        $oldcloner[0] = $clonenames{'cloners'};
                                    }
                                }
                                if (($key eq 'description') || ($key eq 'cloners') ||
                                    ($key eq 'hidefromcat') || ($key eq 'categories') ||
                                    ($key eq 'co-owners') || ($key eq 'lti.override') ||
                                    ($key eq 'lti.topmenu') || ($key eq 'lti.inlinemenu') ||
                                    ($key eq 'lti.lcmenu')) {
                                    push(@need_env_update,$key);
                                }
                            }
                        }
                    }
                    $output .= '</ul>';
                } else {
                    if ($crstype eq 'Community') {
                        $output .= &mt('No changes made to community settings.');
                    } else {
                        $output .= &mt('No changes made to course settings.');
                    }
                }
            }
        }
    }
    if ($skipstore) {
        return $output;
    }
    if (&Apache::lonnet::put('environment',\%storehash,$cdom,$cnum) eq 'ok') {
        if (ref($changes) eq 'HASH') {
            if (ref($changes->{'courseinfo'}) eq 'HASH') {
                if (exists($changes->{'courseinfo'}{'cloners'})) {
                    &change_clone($cdom,$cnum,$changes->{'courseinfo'}{'cloners'},
                                  \@oldcloner);
                }
            }
        }
        if (@delkeys) {
            if (&Apache::lonnet::del('environment',\@delkeys,$cdom,$cnum) ne 'ok') {
                $output .= '<br /><span class="LC_error">';
                if ($crstype eq 'Community') {
                    $output .= &mt('An error occurred when removing community settings which are no longer in use.');
                } else {
                    $output .= &mt('An error occurred when removing course settings which are no longer in use.');
                }
                $output .= '</span>';
            } else {
                foreach my $key (@delkeys) {
                    &Apache::lonnet::delenv('course.'.$cdom.'_'.$cnum.'.'.$key);
                }
            }
        }
        if (@need_env_update) {
            $chome = &Apache::lonnet::homeserver($cnum,$cdom);
            &update_env($cnum,$cdom,$chome,\@need_env_update,\%storehash);
        }
        &Apache::lonnet::coursedescription($env{'request.course.id'},
                                           {'freshen_cache' => 1});
    } else {
        $output = '<span class="LC_error">';
        if ($crstype eq 'Community') {
            $output .= &mt('An error occurred when saving changes to community settings, which remain unchanged.');
        } else {          
            $output .= &mt('An error occurred when saving changes to course settings, which remain unchanged.');
        }
        $output .= '</span>';
    }
    return $output;
}

sub store_linkprot {
    my ($cdom,$cnum,$context,$changes,$oldlinkprot) = @_;
    my ($ltiauth,$home,$lti_save_error,$output,$error,%ltienc,@deletions);
    if ($context eq 'domain') {
        $ltiauth = 1;
        $home = &Apache::lonnet::domain($cdom,'primary');
    } else {
        $home = &Apache::lonnet::homeserver($cnum,$cdom);
        if (exists($env{'course.'.$env{'request.course.id'}.'.internal.ltiauth'})) {
            $ltiauth = $env{'course.'.$env{'request.course.id'}.'.internal.ltiauth'};
        } else {
            my %domdefs = &Apache::lonnet::get_domain_defaults($cdom);
            $ltiauth = $domdefs{'crsltiauth'};
        }
    }
    if (ref($changes) eq 'HASH') {
        foreach my $id (sort { $a <=> $b } keys(%{$changes})) {
            if (ref($changes->{$id}) eq 'HASH') {
                if (exists($changes->{$id}->{'key'})) {
                    $ltienc{$id}{'key'} = $changes->{$id}->{'key'};
                    delete($changes->{$id}->{'key'});
                }
                if (exists($changes->{$id}->{'secret'})) {
                    $ltienc{$id}{'secret'} = $changes->{$id}->{'secret'};
                    delete($changes->{$id}->{'secret'});
                } elsif (ref($oldlinkprot->{$id}) eq 'HASH') {
                    if (exists($oldlinkprot->{$id}{'usable'})) {
                        $changes->{$id}->{'usable'} = 1;
                    }
                    if (exists($oldlinkprot->{$id}{'cipher'})) {
                        $changes->{$id}->{'cipher'} = $oldlinkprot->{$id}{'cipher'};
                    }
                }
            }
        }
    }
    my @ids=&Apache::lonnet::current_machine_ids();
    if (keys(%ltienc) > 0) {
        if ($context eq 'domain') {
            foreach my $id (keys(%ltienc)) {
                if (exists($ltienc{$id}{'secret'})) {
                    $changes->{$id}->{'usable'} = 1;
                }
            }
        } else {
            unless (($home eq 'no_host') || ($home eq '')) {
                my $allowed;
                foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
                if ($allowed) {
                    if (&Apache::lonnet::put('nohist_ltienc',\%ltienc,$cdom,$cnum,1) eq 'ok') {
                        foreach my $id (keys(%ltienc)) {
                            if (exists($ltienc{$id}{'secret'})) {
                                $changes->{$id}->{'usable'} = 1;
                            }
                        }
                    } else {
                        $lti_save_error = 1;
                    }
                }
            }
        }
    }
    unless ($lti_save_error) {
        if ($context eq 'course') {
            if (&Apache::lonnet::put('lti',$changes,$cdom,$cnum,1) eq 'ok') {
                my $hashid=$cdom.'_'.$cnum;
                &Apache::lonnet::devalidate_cache_new('courselti',$hashid);
                unless (($home eq 'no_host') || ($home eq '')) {
                    if (grep(/^\Q$home\E$/,@ids)) {
                        &Apache::lonnet::devalidate_cache_new('courseltienc',$hashid);
                    }
                }
            } else {
                $lti_save_error = 1;
            }
        }
        unless ($lti_save_error) {
            foreach my $id (sort { $a <=> $b } %{$changes}) {
                if (ref($changes->{$id}) eq 'HASH') {
                    my %values = %{$changes->{$id}};
                    my %desc = &linkprot_names();
                    my $display;
                    foreach my $title ('name','lifetime','version','key','secret','returnurl','passbackformat') {
                        if (($title eq 'key') || ($title eq 'secret')) {
                            if (ref($ltienc{$id}) eq 'HASH') {
                                if (exists($ltienc{$id}{$title})) {
                                    if ($title eq 'secret') {
                                        my $length = length($ltienc{$id}{$title});
                                        $display .= $desc{$title}.': ['.&mt('not shown').'], ';
                                    } else {
                                        $display .= $desc{$title}.': '.$ltienc{$id}{$title}.', ';
                                    }
                                }
                            }
                        } elsif ($title eq 'version') {
                            if ($values{$title} eq 'LTI-1p0') {
                                $display .= $desc{$title}.': 1.1, ';
                            }
                        } elsif ($title eq 'returnurl') {
                            if ($values{$title}) {
                                $display .= &mt('Return URL parameter').': '.$values{$title}.', ';
                            }
                        } elsif ($title eq 'passbackformat') {
                            if ($values{$title} eq '1.0') {
                                $display .= &mt('Can return grades to Launcher with Outcomes Service 1.0 format').', ';
                            } elsif ($values{$title} eq '1.1') {
                                $display .= &mt('Can return grades to Launcher with Outcomes Service 1.1 format').', ';
                            }
                        } else {
                            $display .= $desc{$title}.': '.$values{$title}.', ';
                        }
                    }
                    if ($ltiauth) {
                        if (($values{'requser'}) && ($values{'mapuser'} ne '')) {
                            if ($values{'mapuser'} eq 'lis_person_contact_email_primary') {
                                $display .= &mt('Source of username: Email address [_1]',
                                                '(lis_person_contact_email_primary)').', ';
                            } elsif ($values{'mapuser'} eq 'lis_person_sourcedid') {
                                $display .= &mt('Source of username: User ID [_1]',
                                                '(lis_person_sourcedid)').', ';
                            } else {
                                $display .= &mt('Source of username: [_1]',$values{'mapuser'}).', ';
                            }
                            if ($values{'notstudent'} eq 'auth') {
                                $display .= &mt('Display LON-CAPA login page if no match').', ';
                            } elsif ($values{'notstudent'} eq 'reject') {
                                $display .= &mt('Discontinue launch if no match').', ';
                            }
                        }
                    }
                    $display =~ s/, $//;
                    $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('[_1] set to [_2]','<i>'.$id.'</i>',
                                                                              "'$display'")).'</li>';
                } elsif (ref($oldlinkprot->{$id}) eq 'HASH') {
                    my $oldname = $oldlinkprot->{$id}{'name'};
                    $output .= '<li>'.&Apache::lonhtmlcommon::confirm_success(&mt('Deleted setting for [_1]','<i>'."$id ($oldname)".'</i>')).'</li>';
                }
            }
        } else {
            $lti_save_error = 1;
        }
    }
    unless ($lti_save_error) {
        foreach my $id (sort { $a <=> $b } keys(%{$changes})) {
            unless (ref($changes->{$id}) eq 'HASH') {
                push(@deletions,$id);
            }
        }
        if (@deletions) {
            if ($context eq 'course') {
                &Apache::lonnet::del('nohist_ltienc',\@deletions,$cdom,$cnum);
            }
        }
    }
    if ($lti_save_error) {
        $output .= '<li>'.
                   '<span class="LC_error">'.
                   &mt('An error occurred when saving changes to link protection settings, which remain unchanged.').
                   '</span>'.
                   '</li>';
    }
    return $output;
}

sub store_ltitools {
    my ($cdom,$cnum,$context,$changes,$oldltitools) = @_;
    my ($home,$ltitools_save_error,$output,$error,%toolsenc,@deletions);
    my %lt = &ltitools_names();
    my @courseroles = ('cc','in','ta','ep','st');
    my @allfields = ('fullname','firstname','lastname','email','user','roles');
    if ($context eq 'domain') {
        $home = &Apache::lonnet::domain($cdom,'primary');
    } else {
        $home = &Apache::lonnet::homeserver($cnum,$cdom);
    }
    if (ref($changes) eq 'HASH') {
        foreach my $id (sort { $a <=> $b } keys(%{$changes})) {
            if (ref($changes->{$id}) eq 'HASH') {
                if (exists($changes->{$id}->{'key'})) {
                    $toolsenc{$id}{'key'} = $changes->{$id}->{'key'};
                    delete($changes->{$id}->{'key'});
                }
                if (exists($changes->{$id}->{'secret'})) {
                    $toolsenc{$id}{'secret'} = $changes->{$id}->{'secret'};
                    delete($changes->{$id}->{'secret'});
                } elsif (ref($oldltitools->{$id}) eq 'HASH') {
                    if (exists($oldltitools->{$id}{'usable'})) {
                        $changes->{$id}->{'usable'} = 1;
                    }
                    if (exists($oldltitools->{$id}{'cipher'})) {
                        $changes->{$id}->{'cipher'} = $oldltitools->{$id}{'cipher'};
                    }
                }
            }
        }
    }
    my @ids=&Apache::lonnet::current_machine_ids();
    if (keys(%toolsenc) > 0) {
        unless (($home eq 'no_host') || ($home eq '')) {
            my $allowed;
            foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
            if ($allowed) {
                if (($context eq 'domain') ||
                    (($context eq 'course') &&
                     (&Apache::lonnet::put('nohist_toolsenc',\%toolsenc,$cdom,$cnum,1) eq 'ok'))) {
                    foreach my $id (keys(%toolsenc)) {
                        if (exists($toolsenc{$id}{'secret'})) {
                            $changes->{$id}->{'usable'} = 1;
                        }
                    }
                } else {
                    $ltitools_save_error = 1;
                }
            }
        }
    }
    unless ($ltitools_save_error) {
        if ($context eq 'course') {
            if (&Apache::lonnet::put('ltitools',$changes,$cdom,$cnum,1) eq 'ok') {
                my $hashid=$cdom.'_'.$cnum;
                &Apache::lonnet::devalidate_cache_new('courseltitools',$hashid);
                unless (($home eq 'no_host') || ($home eq '')) {
                    if (grep(/^\Q$home\E$/,@ids)) {
                        &Apache::lonnet::devalidate_cache_new('crsltitoolsenc',$hashid);
                    }
                }
            } else {
                $ltitools_save_error = 1;
            }
        }
        unless ($ltitools_save_error) {
            my %bynum;
            foreach my $itemid (sort(keys(%{$changes}))) {
                my $position = $changes->{$itemid}{'order'};
                $bynum{$position} = $itemid;
            }
            foreach my $pos (sort { $a <=> $b } keys(%bynum)) {
                my $itemid = $bynum{$pos};
                if (ref($changes->{$itemid}) ne 'HASH') {
                    $output .= '<li>'.&mt('Deleted: [_1]',$changes->{$itemid}).'</li>';
                } else {
                    $output .= '<li><b>'.$changes->{$itemid}{'title'}.'</b>';
                    if ($changes->{$itemid}{'image'}) {
                        $output .= '&nbsp;'.
                                   '<img src="'.$changes->{$itemid}{'image'}.'"'.
                                   ' alt="'.&mt('Tool Provider icon').'" />';
                    }
                    $output .= '</li><ul>';
                    my $position = $pos + 1;
                    $output .= '<li>'.&mt('Order: [_1]',$position).'</li>';
                    foreach my $item ('version','msgtype','sigmethod','url','lifetime') {
                        if ($changes->{$itemid}{$item} ne '') {
                            $output .= '<li>'.$lt{$item}.':&nbsp;'.$changes->{$itemid}{$item}.'</li>';
                        }
                    }
                    if (ref($toolsenc{$itemid}) eq 'HASH') {
                        foreach my $item ('key','secret') {
                            if (exists($toolsenc{$itemid}{$item})) {
                                if ($item eq 'secret') {
                                    $output .= '<li>'.$lt{$item}.':&nbsp;['.&mt('not shown').']</li>';
                                } else {
                                    $output .= '<li>'.$lt{$item}.':&nbsp;'.$toolsenc{$itemid}{$item}.'</li>';
                                }
                            }
                        }
                    }
                    $output .= '<li>';
                    if ($context eq 'domain') {
                        $output .= &mt('Configurable in course');
                    } else {
                        $output .= &mt('Configurable for each instance of tool in course');
                    }
                    $output .= ':';
                    my @possconfig = ('label','title','target','linktext','explanation','append');
                    my $numconfig = 0;
                    if (ref($changes->{$itemid}{'crsconf'}) eq 'HASH') {
                        foreach my $item (@possconfig) {
                            if ($changes->{$itemid}{'crsconf'}{$item}) {
                                $numconfig ++;
                                $output .= ' "'.$lt{'crs'.$item}.'"';
                            }
                        }
                    }
                    if (!$numconfig) {
                        $output .= '&nbsp;'.&mt('None');
                    }
                    $output .= '</li>';
                    foreach my $item ('passback','roster') {
                        $output .= '<li>'.$lt{$item}.'&nbsp;';
                        if ($changes->{$itemid}{$item}) {
                            $output .= &mt('Yes');
                            if ($changes->{$itemid}{$item.'valid'}) {
                                if ($item eq 'passback') {
                                    $output .= ' '.&mt('valid for at least [quant,_1,day] after launch',
                                                       $changes->{$itemid}{$item.'valid'});
                                } else {
                                    $output .= ' '.&mt('valid for at least [quant,_1,second] after launch',
                                                       $changes->{$itemid}{$item.'valid'});
                                }
                            }
                        } else {
                            $output .= &mt('No');
                        }
                        $output .= '</li>';
                    }
                    if (ref($changes->{$itemid}{'display'}) eq 'HASH') {
                        my $displaylist;
                        if ($changes->{$itemid}{'display'}{'target'}) {
                            $displaylist = &mt('Display target').':&nbsp;'.
                                           $changes->{$itemid}{'display'}{'target'}.',';
                        }
                        foreach my $size ('width','height') {
                            if ($changes->{$itemid}{'display'}{$size}) {
                                $displaylist .= ('&nbsp;'x2).$lt{$size}.':&nbsp;'.
                                                $changes->{$itemid}{'display'}{$size}.',';
                            }
                        }
                        if ($displaylist) {
                            $displaylist =~ s/,$//;
                            $output .= '<li>'.$displaylist.'</li>';
                        }
                        foreach my $item ('linktext','explanation') {
                            if ($changes->{$itemid}{'display'}{$item}) {
                                $output .= '<li>'.$lt{$item}.':&nbsp;'.$changes->{$itemid}{'display'}{$item}.'</li>';
                            }
                        }
                    }
                    if (ref($changes->{$itemid}{'fields'}) eq 'HASH') {
                        my $fieldlist;
                        foreach my $field (@allfields) {
                            if ($changes->{$itemid}{'fields'}{$field}) {
                                $fieldlist .= ('&nbsp;'x2).$lt{$field}.',';
                            }
                        }
                        if ($fieldlist) {
                            $fieldlist =~ s/,$//;
                            if ($changes->{$itemid}{'fields'}{'user'}) {
                                if ($changes->{$itemid}{'incdom'}) {
                                    $fieldlist .= ' ('.&mt('username:domain').')';
                                } else {
                                    $fieldlist .= ' ('.&mt('username').')';
                                }
                            }
                            $output .= '<li>'.&mt('Data sent').':'.$fieldlist.'</li>';
                        }
                    }
                    if (ref($changes->{$itemid}{'roles'}) eq 'HASH') {
                        my $rolemaps;
                        foreach my $role (@courseroles) {
                            if ($changes->{$itemid}{'roles'}{$role}) {
                                $rolemaps .= ('&nbsp;'x2).&Apache::lonnet::plaintext($role,'Course').'='.
                                             $changes->{$itemid}{'roles'}{$role}.',';
                            }
                        }
                        if ($rolemaps) {
                            $rolemaps =~ s/,$//;
                            $output .= '<li>'.&mt('Role mapping:').$rolemaps.'</li>';
                        }
                    }
                    if (ref($changes->{$itemid}{'custom'}) eq 'HASH') {
                        my $customlist;
                        if (keys(%{$changes->{$itemid}{'custom'}})) {
                            foreach my $key (sort(keys(%{$changes->{$itemid}{'custom'}}))) {
                                $customlist .= $key.':'.$changes->{$itemid}{'custom'}{$key}.('&nbsp;'x2);
                            }
                        }
                        if ($customlist) {
                            $output .= '<li>'.&mt('Custom items').': '.$customlist.'</li>';
                        }
                    }
                    $output .= '</ul></li>';
                }
            }
        }
    }
    return $output;
}

sub update_env {
    my ($cnum,$cdom,$chome,$need_env_update,$storehash)  = @_;
    my $count = 0;
    if ((ref($need_env_update) eq 'ARRAY') && (ref($storehash) eq 'HASH')) {    
        my %crsinfo = &Apache::lonnet::courseiddump($cdom,'.',1,'.','.',$cnum,undef,undef,'.');
        if (ref($crsinfo{$env{'request.course.id'}}) eq 'HASH') {
            foreach my $key (@{$need_env_update}) {
                if ($key eq 'description' && defined($storehash->{$key})) {
                    &Apache::lonnet::appenv({'course.'.$env{'request.course.id'}.'.description' => $storehash->{$key}});
                    $crsinfo{$env{'request.course.id'}}{'description'} = $storehash->{$key};
                    $count ++;
                } elsif (($key eq 'cloners') || ($key eq 'hidefromcat') || ($key eq 'categories')) {
                    &Apache::lonnet::appenv({'course.'.$env{'request.course.id'}.'.'.$key => $storehash->{$key}});
                    $crsinfo{$env{'request.course.id'}}{$key} = $storehash->{$key};
                    $count ++;
                } elsif ($key eq 'co-owners') {
                    if ($storehash->{'internal.co-owners'} ne '') {
                        &Apache::lonnet::appenv({'course.'.$env{'request.course.id'}.'.internal.co-owners' => $storehash->{'internal.co-owners'}});
                    }
                    if ($storehash->{'internal.pendingco-owners'} ne '') {
                        &Apache::lonnet::appenv({'course.'.$env{'request.course.id'}.'.internal.pendingco-owners' => $storehash->{'internal.pendingco-owners'}});
                    }
                    my @coowners = split(',',$storehash->{'internal.'.$key});
                    $crsinfo{$env{'request.course.id'}}{'co-owners'} = \@coowners;
                    $count ++;
                } elsif ($key =~ /^lti\./) {
                    &Apache::lonnet::appenv({'course.'.$env{'request.course.id'}.'.'.$key => $storehash->{$key}});
                }
            }
            if ($count) {
                my $putresult = &Apache::lonnet::courseidput($cdom,\%crsinfo,$chome,'notime');
            }
        }
    }
    return;
}

sub display_disallowed {
    my ($item,$disallowed,$prefs,$crstype) = @_;
    my $output;
    if ((ref($disallowed) eq 'HASH') && (ref($prefs) eq 'HASH')) {
        if (keys(%{$disallowed})) {
            if ($item eq 'cloners') {
                my @fails;
                my %lt = &Apache::lonlocal::texthash (
                                 format  => 'Invalid format',
                                 domain  => 'Domain does not exist',
                                 newuser => 'LON-CAPA user(s) do(es) not exist.',
                         );
                foreach my $error ('format','domain','newuser') {
                    if (defined($disallowed->{$error})) {
                        my $msg = '<b>'.$disallowed->{$error}.'</b>, '.&mt('reason').' - '.
                                  $lt{$error}; 
                        if ($error eq 'newuser') {
                            $msg .= '<br />'.&mt("Please [_1]add the user(s)[_2] before returning to the [_3]$crstype Configuration[_2] to add as potential cloners.",'<a href="/adm/createuser">','</a>','<a href="/adm/courseprefs">');
                        }
                        push(@fails,$msg);
                    }
                }
                if (@fails) {
                    $output .= '<span class="LC_warning">'.&mt('Unable to add to allowed cloners: ').
                               '</span>'.join(';&nbsp;&nbsp;',@fails).'.<br />';
                }
            } elsif ($item eq 'rolenames') {
                my %lt = &Apache::lonlocal::texthash (
                    replacements => 'Name already used to replace a different standard role name',
                    regulars     => 'Name already used as a standard role name',
                    customrole   => 'Name already used as the name of a custom role',
                );
                my @fails;
                foreach my $error ('replacements','regulars','customrole') {
                    if (ref($disallowed->{$error}) eq 'ARRAY') {
                        push(@fails,'<b>'.join(', ',@{$disallowed->{$error}}).
                                    '</b>, '.&mt('reason').' - '.$lt{'error'});
                    }
                }
                if (@fails) {
                    $output .= '<span class="LC_warning">'.
                               &mt('Unable to include amongst replacements for role names: ').
                               '</span>'.join(';&nbsp;&nbsp;',@fails).'.<br />';
                }

            } elsif (($item eq 'feedback') || ($item eq 'discussion') || ($item eq 'localization')) {
                $output .= '<span class="LC_warning">';
                if ($item eq 'feedback') {
                    if ($crstype eq 'Community') {
                        $output .= &mt('Unable to include as a recipient of community feedback for:');
                    } else {
                        $output .= &mt('Unable to include as a recipient of course feedback for:');
                    }
                } elsif ($item eq 'discussion') {
                    $output .= &mt('Unable to include in user-based access control for:');
                } elsif ($item eq 'localization') {
                    if ($crstype eq 'Community') {
                        $output .= &mt('Unable to include in community localization:');
                    } else {
                        $output .= &mt('Unable to include in course localization:');
                    }
                }
                $output .= '</span><ul>';
                foreach my $key (sort(keys(%{$disallowed}))) {
                    my $itemtext = $prefs->{$item}{'itemtext'}{$key};
                    $output .=  '<li><i>'.$itemtext.'</i> - ';
                    if ($item eq 'localization') {
                        $output .= &mt('reason - unsupported language: [_1]',
                                       '<b>'.$disallowed->{$key}.'</b>');
                    } else {
                        $output .= &mt('reason - invalid user: [_1]',
                                       '<b>'.$disallowed->{$key}.'</b>').'</li>';
                    }
                }
                $output .= '</ul><br />';
            }
        }
    }
    return $output;
}

sub get_course {
    my ($courseid) = @_;
    if (!defined($courseid)) {
        $courseid = $env{'request.course.id'};
    }
    my $cdom=$env{'course.'.$courseid.'.domain'};
    my $cnum=$env{'course.'.$courseid.'.num'};
    my $chome=$env{'course.'.$courseid.'.home'};
    return ($cnum,$cdom,$chome);
}

sub get_jscript {
    my ($cid,$cdom,$phase,$crstype,$settings,$noedit) = @_;
    my ($can_toggle_cat,$can_categorize) = &can_modify_catsettings($cdom,$crstype);
    my ($jscript,$categorize_js,$loncaparev_js,$instcode_js,$extresource_js,$localization_js);
    my $stubrowse_js = &Apache::loncommon::studentbrowser_javascript();
    my $browse_js = &Apache::loncommon::browser_and_searcher_javascript('parmset');
    my $cloners_js = &cloners_javascript($phase);
    my $currltitools;
    if (ref($settings) eq 'HASH') {
        $currltitools = $settings->{'ltitools'};
    }
    my $ltitools_js = &Apache::lonconfigsettings::ltitools_javascript($currltitools);
    my @code_order;
    if ($crstype ne 'Community') {
        if (ref($settings) eq 'HASH') {
            my %codedefaults;
            &Apache::lonnet::auto_instcode_defaults($cdom,\%codedefaults,
                                                    \@code_order);
            if (@code_order > 0) {
                if ($phase eq 'display') {
                    my @actions = &Apache::loncommon::get_env_multiple('form.actions');
                    if (grep(/^courseinfo$/,@actions)) {
                        if ($settings->{'cloners'} ne '') {
                            unless ($settings->{'cloners'} eq '*') {
                                my @cloners = split(/,/,$settings->{'cloners'});
                                my @standardnames = &Apache::loncommon::get_standard_codeitems();
                                my %local_to_standard;
                                for (my $i=0; $i<@code_order; $i++) {
                                    $local_to_standard{$code_order[$i]} = $standardnames[$i];
                                }
                                foreach my $cloner (@cloners) {
                                    if (($cloner !~ /^\Q*:\E$match_domain$/) &&
                                        ($cloner !~ /^$match_username\:$match_domain$/)) {
                                        foreach my $item (split(/\&/,$cloner)) {
                                            my ($key,$val) = split(/\=/,$item);
                                            $val = &unescape($val);
                                            foreach my $code (@code_order) {
                                                if ($key eq $local_to_standard{$code}) {
                                                    $env{'form.'.$key} = $val;
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
                my @codetitles;
                (undef,$instcode_js) =
                    &Apache::courseclassifier::instcode_selectors($cdom,'display',undef,
                                                                  \@codetitles);
                $instcode_js .= <<ENDSCRIPT;
function toggleCloners(callerradio) {
    if (document.getElementById('LC_cloners_instcode')) {
        if (callerradio.value == 1) {
            document.getElementById('LC_cloners_instcode').style.display = "block";
        } else {
            uncheckOfficialLists();
            document.getElementById('LC_cloners_instcode').style.display = "none";
        }
    }
}

if (!document.getElementsByClassName) {
    function getElementsByClassName(node, classname) {
        var a = [];
        var re = new RegExp('(^| )'+classname+'( |$)');
        var els = node.getElementsByTagName("*");
        for(var i=0,j=els.length; i<j; i++)
            if(re.test(els[i].className))a.push(els[i]);
        return a;
    }
}

function uncheckOfficialLists() {
    var codepicks;
    if (document.getElementsByClassName) {
        codepicks = document.getElementsByClassName('LC_cloners_instcodes');
    } else {
        codepicks = getElementsByClassName(document.body,'LC_cloners_instcodes');
    }
    if (codepicks.length) {
        for (var i=0; i<codepicks.length; i++) {
            codepicks[i].selectedIndex = 0;
        }
    }
}

ENDSCRIPT
            }
        }
    }
    if ($can_categorize) {
        $categorize_js = <<ENDSCRIPT;
function catsbrowser() {
    var catswin = null;
    var url = '/adm/courseprefs?phase=categorizecourse';
    if (!catswin || catswin.closed) {
        catswin=window.open(url,'categorieswin','height=480,width=600,resizable=yes,scrollbars=yes,location=no,menubar=no,toolbar=no');
    } else {
        catswin.focus();
    }
}
ENDSCRIPT
    }
    my $loncaparev = $env{'course.'.$cid.'.internal.releaserequired'};
    if ($loncaparev) {
        $loncaparev_js = <<ENDSCRIPT;
function loncaparevinfo() {
    var lcrevwin = null;
    var url = '/adm/courseprefs?phase=releaseinfo';
    if (!lcrevwin || lcrevwin.closed) {
        lcrevwin=window.open(url,'releasewin','height=480,width=600,resizable=yes,scrollbars=yes,location=no,menubar=no,toolbar=no');
    } else {
        lcrevwin.focus();
    }
}
ENDSCRIPT
    }
    my $cnum = $env{'course.'.$cid.'.num'};
    my $syllabus_js = <<ENDSCRIPT;
function syllabusinfo() {
    var syllwin = null;
    var url = '/public/$cdom/$cnum/syllabus?only_body=1';
    if (!syllwin || syllwin.closed) {
        syllwin=window.open(url,'syllabuswin','height=480,width=600,resizable=yes,scrollbars=yes,location=no,menubar=no,toolbar=no');
    } else {
        syllwin.focus();
    }
}
ENDSCRIPT
    my ($menuitems_js,$grading_js);
    unless ($noedit) {
        my $collections;
        my $next = 1;
        if (ref($settings) eq 'HASH') {
            if ($settings->{'menucollections'} ne '') {
                my @current;
                foreach my $item (split(/;/,$settings->{'menucollections'})) {
                    my ($num) = split(/\%/,$item);
                    if ($num =~ /^\d+$/) {
                        push(@current,$num);
                    }
                }
                $collections = join("','",sort { $a <=> $b } @current);
                if ($collections) {
                    $collections = "'$collections'";
                }
                $next += $current[-1];
            }
        }
        my $deftext = &mt('Standard (all menus shown)');
        $menuitems_js = <<ENDSCRIPT;
function toggleAddmenucoll() {
    if (document.getElementById('menucollections_add')) {
        var state = 'none';
        var add = document.getElementById('menucollections_add').checked;
        if (add) {
            state = 'inline-block';
        }
        var fieldsets = new Array('shown','text','links','list','inline');
        for (var i=0; i<fieldsets.length; i++) {
            if (document.getElementById('addmenucoll_'+fieldsets[i])) {
                document.getElementById('addmenucoll_'+fieldsets[i]).style.display = state;
            }
        }
        var box = document.getElementsByClassName('LC_menucoll_add');
        if (box.length) {
            for (var i=0; i<box.length; i++) {
                if (add) {
                    box[i].checked = true;
                } else {
                    box[i].checked = false;
                }
            }
        }
        if (document.getElementById('menudefault')) {
            var menudef = document.getElementById('menudefault');
            var currsel = menudef.selectedIndex;
            var colls = new Array($collections);
            menudef.options.length = 0;
            if (!add) {
                if (currsel == 1 + colls.length) {
                    currsel = 0;
                }
            }
            if (currsel == 0) {
                menudef.options[0] = new Option('$deftext','',true,true);
            } else {
                menudef.options[0] = new Option('$deftext','',false,false);
            }
            if (colls.length) {
                for (var i=0; i<colls.length; i++) {
                    var idx = i+1;
                    if (currsel == colls[i]) {
                        menudef.options[idx] = new Option(colls[i],colls[i],true,true);
                    } else {
                        menudef.options[idx] = new Option(colls[i],colls[i],false,false);
                    }
                }
            }
            if (add) {
                var addidx = 1 + colls.length;
                if (currsel == addidx) {
                     menudef.options[addidx] = new Option('$next','$next',true,true);
                } else {
                    menudef.options[addidx] = new Option('$next','$next',false,false);
                }
            }
        }
    }
}
ENDSCRIPT
        $grading_js = <<"ENDSCRIPT";
function toggleGrading(form) {
    if (document.getElementById('hidetotalsdiv')) {
        var totalsdivid = document.getElementById('hidetotalsdiv');
        var selname = form.elements['grading'];
        if (selname) {
            var current = selname.options[selname.selectedIndex].value
            if (current == 'standard') {
                totalsdivid.style.display = 'inline-block';
            } else {
                totalsdivid.style.display = 'none';
            }
        }
    }
    return;
}

function toggleHiddenTotalsSec(form) {
    if (document.getElementById('sectotalsdiv')) {
        var sectotalsdivid = document.getElementById('sectotalsdiv');
        var radioname = form.elements['hidetotals'];
        if (radioname) {
            if (radioname.length > 0) {
                var setvis;
                for (var i=0; i<radioname.length; i++) {
                    if (radioname[i].checked == true) {
                        if (radioname[i].value == 1) {
                            sectotalsdivid.style.display = 'inline-block';
                            setvis = 1;
                        }
                        break;
                    }
                }
                if (!setvis) {
                    sectotalsdivid.style.display = 'none';
                }
            }
        }
    }
    return;
}
ENDSCRIPT
    }
    $extresource_js = <<"ENDSCRIPT";
function toggleExtRes() {
    if (document.getElementById('LC_extresource')) {
        var extressel = document.getElementById('LC_extresource').value;
        if (document.getElementById('LC_extresreusediv')) {
            var extresreuse = document.getElementById('LC_extresreusediv');
            if (document.getElementById('LC_extressize')) {
                var extressize = document.getElementById('LC_extressize');
                var setvis;
                if ((extressel == 'tab') || (extressel == 'window')) {
                    extresreuse.style.display = 'inline-block';
                    setvis = 1;
                    if (extressel == 'window') {
                        extressize.style.display = 'inline-block';
                    } else {
                        extressize.style.display = 'none';
                    }
                }
                if (!setvis) {
                    extresreuse.style.display = 'none';
                    extressize.style.display = 'none';
                }
            }
        }
    }
}
ENDSCRIPT
    $localization_js = <<"ENDSCRIPT";
function toggleTimeZone() {
    if (document.getElementById('LC_set_timezone')) {
        var timezonesel = document.getElementById('LC_set_timezone').value;
        if (document.getElementById('LC_tzoverdiv')) {
            var tzoverdiv = document.getElementById('LC_tzoverdiv');
            if (timezonesel == '') {
                tzoverdiv.style.display = 'none';
            } else {
                tzoverdiv.style.display = 'block';
            }
        }
    }
}
ENDSCRIPT
    $jscript = '<script type="text/javascript" language="Javascript">'."\n".
               '// <![CDATA['."\n".
               $browse_js."\n".$categorize_js."\n".$loncaparev_js."\n".
               $cloners_js."\n".$instcode_js."\n".$localization_js."\n".
               $syllabus_js."\n".$menuitems_js."\n".$extresource_js."\n".
               $grading_js."\n".&linkprot_javascript()."\n".'//]]>'."\n".
               '</script>'."\n".$stubrowse_js."\n".$ltitools_js."\n";
    return $jscript;
}

sub cloners_javascript {
    my ($formname) = @_;
    return <<"ENDSCRIPT";

function update_cloners(caller,num) {
    var delidx = getIndexByName('cloners_delete');
    var actidx = getIndexByName('cloners_activate');
    if (caller == 'cloners_all') {
        var selall;
        for (var i=0; i<document.$formname.cloners_all.length; i++) {
            if (document.$formname.cloners_all[i].checked) {
                selall = document.$formname.cloners_all[i].value;
            }
        }
        if (selall == 1) {
            if (delidx != -1) {
                if (document.$formname.cloners_delete.length) {
                    for (var j=0; j<document.$formname.cloners_delete.length; j++) {
                        document.$formname.cloners_delete[j].checked = true;
                    }
                } else {
                    document.$formname.elements[delidx].checked = true;
                }
            }
            if (actidx != -1) {
                if (document.$formname.cloners_activate.length) {
                    for (var i=0; i<document.$formname.cloners_activate.length; i++) {
                        if (document.$formname.cloners_activate[i].value == '0') {
                            document.$formname.cloners_activate[i].checked = false;
                        }
                        if (document.$formname.cloners_activate[i].value == '-1') {
                            document.$formname.cloners_activate[i].checked = true;
                        }
                    }
                }
            }
            document.$formname.cloners_newdom.selectedIndex = 0;
        }
    }
    if (caller == 'cloners_activate') {
        if (document.$formname.cloners_activate.length) {
            for (var j=0; j<document.$formname.cloners_activate.length; j++) {
                if (document.$formname.cloners_activate[j].value == num) {
                    if (document.$formname.cloners_activate[j].checked) {
                        for (var i=0; i<document.$formname.cloners_all.length; i++) {
                            if (document.$formname.cloners_all[i].value == '1') {
                                document.$formname.cloners_all[i].checked = false;
                            }
                            if (document.$formname.cloners_all[i].value == '0') {
                                document.$formname.cloners_all[i].checked = true;
                            }
                        }
                    }
                }
            }
        } else {
            for (var i=0; i<document.$formname.cloners_all.length; i++) {
                if (document.$formname.cloners_all[i].value == '1') {
                    document.$formname.cloners_all[i].checked = false;
                }
                if (document.$formname.cloners_all[i].value == '0') {
                    document.$formname.cloners_all[i].checked = true;
                }
            }
        }
    }
    return;
}

function getIndexByName(item) {
    for (var i=0;i<document.$formname.elements.length;i++) {
        if (document.$formname.elements[i].name == item) {
            return i;
        }
    }
    return -1;
}

ENDSCRIPT
}

sub linkprot_javascript {
    return <<"ENDSCRIPT";
function toggleLinkProtExtra(form,item,extra,valon,styleon,num) {
    if (document.getElementById('linkprot_'+extra+'_'+num)) {
        var extraid = document.getElementById('linkprot_'+extra+'_'+num);
        var itemname = form.elements['linkprot_'+item+'_'+num];
        if (itemname) {
            if (itemname.length > 0) {
                var setvis;
                for (var i=0; i<itemname.length; i++) {
                    if (itemname[i].checked == true) {
                        if (itemname[i].value == valon) {
                            extraid.style.display = styleon;
                            setvis = 1;
                        }
                        break;
                    }
                }
                if (!setvis) {
                    extraid.style.display = 'none';
                }
            }
        }
    }
    return;
}

ENDSCRIPT

}

sub print_courseinfo {
    my ($cdom,$settings,$ordered,$itemtext,$rowtotal,$crstype,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($ordered) eq 'ARRAY') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    my ($cathash,$categoriesform,$autocoowner,$clonedefaults,$disabled);
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    my %domconf = 
        &Apache::lonnet::get_dom('configuration',
                                 ['coursecategories','autoenroll','coursedefaults'],$cdom);
    if (ref($domconf{'coursecategories'}) eq 'HASH') {
        $cathash = $domconf{'coursecategories'}{'cats'};
        if (ref($cathash) eq 'HASH') {
            $categoriesform = 
                &Apache::loncommon::assign_categories_table($cathash,
                                                $settings->{'categories'},$crstype,$disabled)."\n";
        }
    }
    if (ref($domconf{'autoenroll'}) eq 'HASH') {
        $autocoowner = $domconf{'autoenroll'}{'co-owners'};
    }
    my ($currcanclone,@code_order,$cloner_instcode);
    my %codedefaults;
    &Apache::lonnet::auto_instcode_defaults($cdom,\%codedefaults,
                                            \@code_order);
    if ($settings->{'cloners'}) {
        unless ($settings->{'cloners'} eq '*') {
            my @currclone = split(/,/,$settings->{'cloners'});
            foreach my $item (@currclone) {
                unless ($item eq '*') {
                    if (($item !~ /\:/) && ($item =~ /=/)) {
                        $cloner_instcode = 1;
                    }
                }
            }
        }
    }
    if (ref($domconf{'coursedefaults'}) eq 'HASH') {
        my $canclone = $domconf{'coursedefaults'}{'canclone'};
        if (ref($canclone) eq 'HASH') {
            if (ref($canclone->{'instcode'}) eq 'ARRAY') {
                if ($settings->{'internal.coursecode'}) {
                    my @posscodes;
                    if (@code_order > 0) {
                        $currcanclone = 'instcode';
                        foreach my $item (@{$canclone->{'instcode'}}) {
                            if (grep(/^\Q$item\E$/,@code_order)) {
                                push(@posscodes,$item);
                            }
                        }
                        my $codestr = join(' + ',@posscodes);
                        $clonedefaults = &mt('Default for official courses is to also allow cloning if [_1] match in cloner and cloned.',
                                             '"<span class="LC_nobreak" style="font-style:italic">'.$codestr.'</span>"').'<br />';
                    }
                }
            }
        } elsif ($canclone eq 'domain') {
            $clonedefaults = &mt('Default is for any course requester in [_1] domain to be able to clone.',
                                 '<span class="LC_nobreak" style="font-style:italic">'.$cdom.'</span>').'<br />';
            $currcanclone = 'domain';
        }
        if ($clonedefaults) {
            if ($settings->{'cloners'} ne '') {
                $clonedefaults .= '<br />'.&mt('Default does [_1]not[_2] currently apply because values have been set in the course.','<b>','</b>');
            } else {
                $clonedefaults .= &mt('Default is disregarded if [_1]any[_2] values are set here in the course.','<i>','</i>');
            }
            $clonedefaults = '<br /><br />'.$clonedefaults;
        }
    }
    if (!defined($categoriesform)) {
        $categoriesform = &mt('No categories defined in this domain.');
    }
    my ($can_toggle_cat,$can_categorize) = &can_modify_catsettings($cdom,$crstype);
    my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};

    my $replace;
    if ($crstype eq 'Community') {
        $replace = &mt('To replace the standard title for a course role, enter a title, otherwise leave blank');
    } else {
        $replace = &mt('To replace the standard title for a course role, enter a title, otherwise leave blank');
    }
    my ($editmap,$editsyllabus);
    unless ($noedit) {
        $editmap = ('&nbsp;'x2).
                   '<a href="javascript:openbrowser'.
                   "('display','url','sequence')\">".
                   &mt('Select Map').'</a><br /><span class="LC_warning"> '.
                   &mt('Modification may make assessment data inaccessible!').
                   '</span>';
        $editsyllabus = &mt('[_1]Edit[_2]','<a href="/public/'.$cdom.'/'.$cnum.'/syllabus?forceedit=1">',
                            '</a>');
    }
    my %items = (
        'url' => {
                   text => '<b>'.&mt($itemtext->{'url'}).'</b>'.$editmap,
                   input => 'textbox',
                   size  => '55',
                   advanced => 1
                 },
        'description'  => { 
                   text => '<b>'.&mt($itemtext->{'description'}).'</b>',
                   input => 'textbox',
                   size  => '55',
                          },
        'owner'        => {
                   text => '<b>'.&mt($itemtext->{'owner'}).'</b>',
                          },
        'co-owners'    => {
                   text => '<b>'.&mt($itemtext->{'co-owners'}).'</b>',
                          },
        'clonedfrom'   => {
                   text => '<b>'.&mt($itemtext->{'clonedfrom'}).'</b>',
                          },
        'courseid'     => { 
                   text => '<b>'.&mt($itemtext->{'courseid'}).'</b><br />'.'('.
                           &mt('internal, optional').')',
                   input => 'textbox',
                   size  => '25',
                          },
        'uniquecode'   => {
                   text => '<b>'.&mt($itemtext->{'uniquecode'}).'</b>',
                          },
        'cloners'      => { 
                   text => '<b>'.&mt($itemtext->{'cloners'}).'</b><br />'.
                           &mt('Owner and Coordinators included automatically').
                           $clonedefaults,
                   input => 'textbox',
                   size  => '40'
                         },
        'rolenames'  => { 
                   text  => '<b>'.&mt($itemtext->{'rolenames'}).'</b><br />'.
                            '('.$replace.')',
                   input => 'textbox',
                   size  => '20',
                   advanced => 1
                        },
        'syllabus' => {
                   text => '<b>'.&mt($itemtext->{'syllabus'}).'</b><br />'.
                           &mt('(Syllabus type in use)').('&nbsp;' x2).
                           $editsyllabus,
                        },
        'hidefromcat' => {
                   text => '<b>'.&mt($itemtext->{'hidefromcat'}).'</b><br />'.
                           ' ('.&mt('included by default if assigned institutional code, or categorized').')',
                   input => 'radio',
                         },
        'categories' => {
                   text => '<b>'.&mt($itemtext->{'categories'}).'</b> <a href="javascript:catsbrowser()">'.
                           &mt('Display Categories').'</a>',
                   input => 'textbox',
                   size  => '25',
                        },
        'loncaparev' => {
                   text => '<b>'.&mt($itemtext->{'loncaparev'}).'</b>',
                        },
        'defaultcredits' => {
                   text => '<b>'.&mt($itemtext->{'defaultcredits'}).'</b>',
                        },
    );
    my $datatable;
    my $count = 0;
    foreach my $item (@{$ordered}) {
        my $colspan;
        if ($item eq 'hidefromcat') {
            next if (!$can_toggle_cat);
        } elsif ($item eq 'categories') {
            next if (!$can_categorize);
        } elsif ($item eq 'uniquecode') {
            next if (!$env{'course.'.$env{'request.course.id'}.'.internal.uniquecode'});
        }
        unless (($item eq 'cloners') || ($item eq 'rolenames')) {
            $colspan = 2;
        }
        $count ++;
        if (exists $items{$item}{advanced} && $items{$item}{advanced} == 1) {
        	$datatable .= &item_table_row_start($items{$item}{text},$count,"advanced",$colspan);
        } else {
        	$datatable .= &item_table_row_start($items{$item}{text},$count,undef,$colspan);
        }
        if ($items{$item}{input} eq 'radio') {
            $datatable .= &yesno_radio($item,$settings,undef,undef,undef,$noedit);
        } elsif ($item eq 'cloners') {
            my $includeempty = 1;
            my $num = 0;
            $datatable .= '</td><td align="right">'.
                          &Apache::loncommon::start_data_table().
                          &Apache::loncommon::start_data_table_row().
                          '<td><span class="LC_nobreak"><label>'.
                          &mt('Any user in any domain:').
                          '&nbsp;<input type="radio" name="cloners_all" value="1" ';
            if ($settings->{$item} eq '*') {
                $datatable .= ' checked="checked" ';
            }
            $datatable .= 'onchange="javascript:update_cloners('.
                          "'cloners_all'".');"'.$disabled.' />'.&mt('Yes').'</label>'.
                          ('&nbsp;'x2).'<label>'.
                          '<input type="radio" name="cloners_all" value="0" ';
            if ($settings->{$item} ne '*') {
                $datatable .= ' checked="checked" ';
            }
            $datatable .= ' onchange="javascript:update_cloners('.
                          "'cloners_all'".');"'.$disabled.' />'.&mt('No').'</label></td>'.
                          &Apache::loncommon::end_data_table_row().
                          &Apache::loncommon::end_data_table().
                          '<table><tr><td align="left"><b>'.&mt('Or').
                          '</b></td></tr></table>'.
                          &Apache::loncommon::start_data_table();
            my @cloners;
            if ($settings->{$item} eq '') {
                unless ($noedit) {
                    my $default;
                    if ($currcanclone eq 'domain') {
                        $default = '0';
                    }
                    $datatable .= &new_cloners_dom_row($cdom,'0',$default);
                }
            } elsif ($settings->{$item} ne '*') {
                my @entries = split(/,/,$settings->{$item});
                if (@entries > 0) {
                    foreach my $entry (@entries) {
                        my ($uname,$udom) = split(/:/,$entry);
                        if ($udom =~ /^$match_domain$/) {
                            unless (&Apache::lonnet::domain($udom)) {
                                next;
                            }
                        } else {
                            next;
                        }
                        if ($uname eq '*') {
                            $datatable .= 
                                &Apache::loncommon::start_data_table_row().
                                '<td valign="top" align="left"><span class="LC_nobreak">'.
                                &mt('Any user in domain:').'<b>&nbsp;'.$udom.
                                '</b><input type="hidden" name="cloners_dom_'.$num.
                                '" value="'.$udom.'" /></span><br />'.
                                '<span class="LC_nobreak"><label><input type="checkbox" '.
                                'name="cloners_delete" value="'.$num.'" onchange="javascript:update_cloners('."'cloners_delete','$num'".');"'.$disabled.' />'.
                                &mt('Delete').'</label></span></td>'.
                                &Apache::loncommon::end_data_table_row();
                            $num ++;
                        } elsif (&Apache::lonnet::homeserver($uname,$udom) ne 'no_host') {
                            unless (grep(/^\Q$entry\E$/,@cloners)) {
                                push(@cloners,$entry);
                            }
                        }
                    }
                }
            }
            my $add_domtitle = &mt('Any user in additional domain:');
            if ($settings->{$item} eq '*') {
                $add_domtitle = &mt('Any user in specific domain:');
            } elsif ($settings->{$item} eq '') {
                $add_domtitle = &mt('Any user in other domain:');
            }
            my $cloners_str = join(',',@cloners);
            $datatable .= &Apache::loncommon::start_data_table_row().
                          '<td align="left"><span class="LC_nobreak">'.
                          $add_domtitle.'</span><br />'.
                          &Apache::loncommon::select_dom_form('','cloners_newdom',
                                                              $includeempty,undef,undef,
                                                              undef,undef,$noedit).
                          '<input type="hidden" name="cloners_total" value="'.$num.'" />'.
                          '</td>'.&Apache::loncommon::end_data_table_row().
                          &Apache::loncommon::end_data_table().
                          '<table><tr><td align="left"><b>'.&mt('And').
                          '</b></td></tr></table>'.
                          &Apache::loncommon::start_data_table().
                          &Apache::loncommon::start_data_table_row().
                          '<td align="left">'.
                          &mt('Specific users').'&nbsp;(<tt>'.
                          &mt('user:domain,user:domain').'</tt>)<br />'.
                          &Apache::lonhtmlcommon::textbox($item,$cloners_str,
                                                          $items{$item}{'size'},$disabled).
                          '</td>'.&Apache::loncommon::end_data_table_row().
                          &Apache::loncommon::end_data_table();
            if (@code_order > 0) {
                my (%cat_items,@codetitles,%cat_titles,%cat_order);
                my ($jscript,$totcodes,$numtitles,$lasttitle) =
                    &Apache::courseclassifier::instcode_selectors_data($cdom,'display',
                                                                       \%cat_items,\@codetitles,
                                                                       \%cat_titles,\%cat_order);
                my $showncodes = 'off';
                my $checkedoff = ' checked="checked"';
                my $checkedon = '';
                if ($cloner_instcode) {
                    $checkedon = $checkedoff;
                    $checkedoff = '';
                    $showncodes = 'on';
                }
                $datatable .= '<table><tr><td align="left"><b>'.&mt('And').
                              '</b></td></tr></table>'.
                              &Apache::loncommon::start_data_table().
                              &Apache::loncommon::start_data_table_row().
                              '<td align="left"><span class="LC_nobreak">'.
                              &mt('Cloning by official course(s) based on course category').('&nbsp;'x2).
                              '<label>'.
                              '<input type="radio" name="cloners_instcode" value="1" onclick="toggleCloners(this);"'.$checkedon.$disabled.' />'.&mt('Yes').'</label>'.
                              ('&nbsp;').
                              '<label>'.
                              '<input type="radio" name="cloners_instcode" value="0" onclick="toggleCloners(this);"'.$checkedoff.$disabled.' />'.&mt('No').'</label>'.
                              &Apache::courseclassifier::build_instcode_selectors($numtitles,
                                  $lasttitle,\%cat_items,\@codetitles,\%cat_titles,\%cat_order,
                                  $showncodes,'LC_cloners_instcodes','LC_cloners_instcode',$noedit).
                              '</td>'.&Apache::loncommon::end_data_table_row().
                              &Apache::loncommon::end_data_table();
            }
        } elsif ($item eq 'rolenames') {
            $datatable .= '</td><td align="right">'.
                          &Apache::loncommon::start_data_table();
            my @roles;
            if ($crstype eq 'Community') {
                @roles = ('co');
            } else {
                @roles = ('cc');
            }
            push (@roles,('in','ta','ep','ad','st'));
            foreach my $role (@roles) {
                $datatable .= &Apache::loncommon::start_data_table_row().
                              '<td align="left"><span class="LC_nobreak">'.
                              &Apache::lonnet::plaintext($role,$crstype,undef,1).
                              '</span></td><td align="left">'.
                              &Apache::lonhtmlcommon::textbox('rolenames_'.$role,
                                                 $settings->{$role.'.plaintext'},
                                                 $items{$item}{size},$disabled).'</td>'.
                              &Apache::loncommon::end_data_table_row();
            }
            $datatable .= &Apache::loncommon::end_data_table().'</td>';
        } elsif ($item eq 'categories') {
            my $launcher;
            if ($noedit) {
                $launcher = $disabled;
            } else {
                $launcher = 'onfocus="this.blur();javascript:catsbrowser();"';
            }
            $datatable .= '<input type="hidden" name="categories" value="'.$settings->{$item}.'" />'.
                          &Apache::lonhtmlcommon::textbox($item.'_display',$settings->{$item},
                                                          $items{$item}{size},$launcher);
        } elsif ($item eq 'owner') {
            my $owner = $env{'course.'.$env{'request.course.id'}.'.internal.courseowner'};
            if ($owner =~ /:/) {
                my ($ownername,$ownerdom) = split(':',$owner); 
                $owner = &Apache::loncommon::plainname($ownername,$ownerdom);
            } elsif ($owner ne '') {
                $owner = &Apache::loncommon::plainname($owner,$cdom);
            } else {
                $owner = &mt('None specified');
            }
            $datatable .= $owner;
        } elsif ($item eq 'clonedfrom') {
            my $clonesrc = $env{'course.'.$env{'request.course.id'}.'.clonedfrom'};
            my $clonedfrom = &mt('None');
            if ($clonesrc =~ m{/$match_domain/$match_courseid}) {
                my %clonesrcinfo = &Apache::lonnet::coursedescription($clonesrc);
                if ($clonesrcinfo{'description'}) {
                    $clonedfrom = $clonesrcinfo{'description'}.' '.($clonesrc);
                }
            }
            $datatable .= $clonedfrom;
        } elsif ($item eq 'uniquecode') {
            my $code = $env{'course.'.$env{'request.course.id'}.'.internal.uniquecode'};
            if ($code) {
                $datatable .= $code;
            }
        } elsif ($item eq 'co-owners') {
            my $coowners = $env{'course.'.$env{'request.course.id'}.'.internal.co-owners'};
            my @currcoown;
            if ($coowners) {
                @currcoown = split(',',$coowners);
            }
            if (&Apache::lonnet::is_course_owner($cdom,$cnum)) {
                if (($crstype eq 'Course') && ($env{'course.'.$env{'request.course.id'}.'.internal.coursecode'}) && ($autocoowner)) {
                    $datatable .= &show_autocoowners(@currcoown);
                } else {
                    $datatable .= &coowner_invitations($cnum,$cdom,\@currcoown,$noedit);
                }
            } else {
                if (($crstype eq 'Course') && ($env{'course.'.$env{'request.course.id'}.'.internal.coursecode'}) && ($autocoowner)) {
                    $datatable .= &show_autocoowners(@currcoown);
                } else {
                    $datatable .= &manage_coownership($cnum,$cdom,\@currcoown,$noedit);
                }
            }
        } elsif ($item eq 'syllabus') {
            my $external = $env{'course.'.$env{'request.course.id'}.'.externalsyllabus'};
            my $uploaded = $env{'course.'.$env{'request.course.id'}.'.uploadedsyllabus'};
            my $minimal =  $env{'course.'.$env{'request.course.id'}.'.minimalsyllabus'};
            if (($minimal =~/\w/) || ($uploaded =~/\w/)) {
                if ($minimal =~/\w/) {
                    if ($external =~ m{\Q$minimal\E$}) {
                        undef($external);
                    }
                } elsif ($uploaded =~/\w/) {
                    if ($external =~ m{\Q$uploaded\E$}) {
                        undef($external);
                    }
                }
            } elsif ($external!~/\w/) {
                undef($external);
            }
            if ($external) {
                $datatable .= &mt('External URL');
            } elsif ($minimal) {
                $datatable .= &mt('Minimal template');
            } elsif ($uploaded) {
                $datatable .= &mt('Uploaded file');
            } else {
                $datatable .= &mt('Standard template');
            }
            $datatable .= ('&nbsp;' x 2).
                          &mt('[_1]View[_2]',
                              '<a href="javascript:syllabusinfo();">',
                              '</a>');
        } elsif ($item eq 'loncaparev') {
            my $loncaparev = $env{'course.'.$env{'request.course.id'}.'.internal.releaserequired'};
            my $showreqd;
            if ($loncaparev) {
                $showreqd = &mt('[_1] or newer',$loncaparev).' <a href="javascript:loncaparevinfo()">'.
                            &mt('Details').'</a>';
            } else {
                $showreqd = &mt('No specific version required');
            }
            $datatable .= $showreqd;
        } else {
            $datatable .= &Apache::lonhtmlcommon::textbox($item,$settings->{$item},$items{$item}{size},$disabled);
        }
        $datatable .= &item_table_row_end();
    }
    $$rowtotal += scalar(@{$ordered});
    return $datatable;
}

sub new_cloners_dom_row {
    my ($newdom,$num,$default) = @_;
    my ($output,$checkedon,$checkedoff);
    if ($newdom ne '') {
        if ($num eq $default) {
           $checkedon = 'checked="checked" ';
        } else {
           $checkedoff = 'checked="checked" ';
        }
        $output .= &Apache::loncommon::start_data_table_row().
                   '<td valign="top"><span class="LC_nobreak">'.
                   &mt('Any user in domain:').'&nbsp;<b>'.$newdom.'</b>'.
                   ('&nbsp;'x2).'<label><input type="radio" '.
                   'name="cloners_activate" value="'.$num.'" '.$checkedon.
                   'onchange="javascript:update_cloners('.
                   "'cloners_activate','$num'".');" />'.
                   &mt('Yes').'</label>'.('&nbsp;'x2).
                   '<label><input type="radio" '.
                   'name="cloners_activate" value="-1" '.$checkedoff.
                   'onchange="javascript:update_cloners('.
                   "'cloners_activate','$num'".');" />'.
                   &mt('No').'</label><input type="hidden" name="cloners_dom_'.
                   $num.'" value="'.$newdom.'" /></span></td>'.
                   &Apache::loncommon::end_data_table_row();
    }
    return $output;
}

sub can_modify_catsettings {
    my ($dom,$crstype) = @_;
    my %domconf = &Apache::lonnet::get_dom('configuration',['coursecategories'],$dom);
    my ($can_toggle_cat,$can_categorize);
    if (ref($domconf{'coursecategories'}) eq 'HASH') {
        if ($crstype eq 'Community') {
            if ($domconf{'coursecategories'}{'togglecatscomm'} eq 'comm') {
                $can_toggle_cat = 1;
            }
            if ($domconf{'coursecategories'}{'categorizecomm'} eq 'comm') {
                $can_categorize = 1;
            }
        } else {
            if ($domconf{'coursecategories'}{'togglecats'} eq 'crs') {
                $can_toggle_cat = 1;
            }
            if ($domconf{'coursecategories'}{'categorize'} eq 'crs') {
                $can_categorize = 1;
            }
        }
    }
    return ($can_toggle_cat,$can_categorize);
}

sub assign_course_categories {
    my ($r,$crstype) = @_;
    my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
    my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
    my $hascats = 0;
    my $cathash;
    my %domconf = &Apache::lonnet::get_dom('configuration',['coursecategories'],$cdom);
    if (ref($domconf{'coursecategories'}) eq 'HASH') {
        $cathash = $domconf{'coursecategories'}{'cats'};
        if (ref($cathash) eq 'HASH') {
            foreach my $cat (keys(%{$cathash})) {
                next if ($cat eq 'instcode::0');
                unless ($crstype eq 'Community') {
                    next if ($cat eq 'communities::0');
                }
                $hascats ++; 
            }
        }
    }
    my $catwin_js;
    if ($hascats) {
        my $alert;
        if ($crstype eq 'Community') {
            $alert = &mt("Use 'Save' in the main window to save community categories");
        } else {
            $alert = &mt("Use 'Save' in the main window to save course categories");
        }
        &js_escape(\$alert);
        $catwin_js = <<ENDSCRIPT;
<script type="text/javascript">

function updateCategories() {
    var newcategories = '';
    var unescapedcats = '';
    if (document.chgcats.usecategory.length) {
        for (var i=0; i<document.chgcats.usecategory.length; i++) {
            if (document.chgcats.usecategory[i].checked == true) {
                newcategories = newcategories + document.chgcats.usecategory[i].value + '&';
                unescapedcats = unescapedcats + document.chgcats.catname[i].value + ' & ';
            }
        }
        if (newcategories.length > 0) {
            newcategories = newcategories.slice(0,-1);
        }
        if (unescapedcats.length > 0) {
            unescapedcats = unescapedcats.slice(0,-3);
        }
    } else {
         if (document.chgcats.usecategory.checked == true) {
             newcategories = document.chgcats.usecategory.value;
             unescapedcats = document.chgcats.catname.value;
         }
    }
    opener.document.display.categories.value = newcategories;
    opener.document.display.categories_display.value = unescapedcats;
    alert("$alert");
    self.close();
    return;
}

</script>
ENDSCRIPT
    } else {
        my $onload;
    }
    my ($crscat,$catcrs,$assign);
    if ($crstype eq 'Community') {
        $crscat = 'Community Categories';
        $catcrs = &mt('Categorize Community');
        $assign = &mt('Assign one or more categories to this community.')
    } else {
        $crscat = 'Course Categories';
        $catcrs = &mt('Categorize Course');
        $assign = &mt('Assign one or more categories to this course.')
    }
    my $start_page =
        &Apache::loncommon::start_page($crscat,$catwin_js,
                                       {'only_body'      => 1,});
    my $end_page = &Apache::loncommon::end_page();
    my $categoriesform = '<h3>'.$catcrs.'</h3>';
    if ($hascats) {
        my %currsettings =
            &Apache::lonnet::get('environment',['hidefromcat','categories'],$cdom,$cnum);
        my $cattable = &Apache::loncommon::assign_categories_table($cathash,
                                       $currsettings{'categories'},$crstype);
        if ($cattable eq '') {
            $categoriesform .= &mt('No suitable categories defined for this course type in this domain.'); 
        } else {
            $categoriesform .= $assign.'<br /><br />'.
                               '<form name="chgcats" action="/adm/courseprefs" method="post">'."\n".
                               $cattable."\n".
                               '<br /><input type="button" name="changes" value="'.
                               &mt('Copy to main window').'" '.
                               'onclick="javascript:updateCategories()" /></form><br />';
        }
    } else {
        $categoriesform .= &mt('No categories defined in this domain.');
    }
    $r->print($start_page.$categoriesform.$end_page);
    return;
}

sub display_loncaparev_constraints {
    my ($r,$navmap,$loncaparev,$crstype) = @_;
    my ($reqdmajor,$reqdminor);
    my $cid = $env{'request.course.id'};
    my $cdom = $env{'course.'.$cid.'.domain'};
    my $cnum = $env{'course.'.$cid.'.num'};
    my $output;
    my %lt = &Apache::lonlocal::texthash (
                                           'all'           => 'all',
                                           'section/group' =>  'section/group',
                                           'user'          => 'user',
                                         );
    &Apache::lonrelrequtils::init_global_hashes();
    if (defined($Apache::lonrelrequtils::checkcrstypes{$crstype})) {
        ($reqdmajor,$reqdminor) = split(/\./,$Apache::lonrelrequtils::checkcrstypes{$crstype});
        $output .= '<h4>'.&mt('Course type: [_1] requires [_2] or newer',$crstype,
                              $Apache::lonrelrequtils::checkcrstypes{$crstype}).'</h4>';
    }
    my (%fromparam,%rowspan,%bymap,%byresource,@scopeorder,%toshow,%allmaps,
        %byresponsetype,%bysubmission,%fromblocks,%bycrsrestype);
    @scopeorder = ('all','section/group','user');
    my $now = time;
    my $resourcedata = &Apache::lonparmset::readdata($cnum,$cdom);
    if (ref($resourcedata) eq 'HASH') {
        foreach my $key (keys(%{$resourcedata})) {
            my %found;
            foreach my $item (keys(%Apache::lonrelrequtils::checkparms)) {
                if ($key =~ /(\Q$item\E)$/) {
                    if (ref($Apache::lonrelrequtils::checkparms{$item}) eq 'ARRAY') {
                        my $value = $resourcedata->{$key};
                        if ($item eq 'examcode') {
                            if (&Apache::lonnet::validCODE($value)) {
                                $value = 'valid';
                            } else {
                                $value = '';
                            }
                        } elsif ($item eq 'printstartdate') {
                            if ($value =~ /^\d+$/) {
                                if ($value > $now) {
                                    $value = 'future';
                                }
                            }
                        } elsif ($item eq 'printenddate') {
                            if ($value =~ /^\d+$/) {
                                if ($value < $now) {
                                    $value = 'past';
                                }
                            }
                        }
                        if (grep(/^\Q$value\E$/,@{$Apache::lonrelrequtils::checkparms{$item}})) {
                            my $stdtype = &Apache::lonparmset::standard_parameter_types($item);
                            $found{$item}{'valname'} = &get_param_description($stdtype,$value);
                            $found{$item}{'rev'} = $Apache::lonnet::needsrelease{'parameter:'.$item.':'.$value.'::'};
                        }
                    }
                }
            }
            foreach my $item (keys(%Apache::lonrelrequtils::checkparmvalsmatch)) {
                if (ref($Apache::lonrelrequtils::checkparmvalsmatch{$item}) eq 'ARRAY') {
                    my $value = $resourcedata->{$key};
                    foreach my $valuematch (@{$Apache::lonrelrequtils::checkparmvalsmatch{$item}}) {
                        if ($value =~ /$valuematch/) {
                            my $stdtype = &Apache::lonparmset::standard_parameter_types($item);
                            $found{$item}{'valname'} = &get_param_description($stdtype,$value,1);
                            $found{$item}{'rev'} = 
                                $Apache::lonnet::needsrelease{'parameter:'.$item.'::'.$valuematch.':'};
                            last;
                        }
                    }
                }
            }
            foreach my $item (keys(%Apache::lonrelrequtils::checkparmnamesmatch)) {
                my $regexp;
                if ($item eq 'maplevelrecurse') {
                    $regexp = '\.(?:sequence|page)___\(rec\)\.';
                }
                if ($regexp ne '') {
                    if ($key =~ /$regexp.*\.(\w+)$/) {
                        my $name = $1;
                        my $value = $resourcedata->{$key};
                        if ($name eq 'type') { 
                            last unless (($value eq 'problem') || ($value eq 'practice') || ($value eq 'exam') ||
                                         ($value eq 'survey') || ($value eq 'surveycred') || ($value eq 'anonsurvey') || 
                                         ($value eq 'anonsurveycred') || ($value eq 'randomizetry') || ($value eq 'library'));
                        }
                        my $stdtype = &Apache::lonparmset::standard_parameter_types($name);
                        $found{$name}{'valname'} = &get_param_description($stdtype,$value);
                        $found{$name}{'extra'} = &mt('Recursive into sub-folders');
                        $found{$name}{'rev'} =
                            $Apache::lonnet::needsrelease{'parameter::::'.$item};
                    }
                }
            }
            foreach my $item (keys(%found)) {
                my $stdname = &Apache::lonparmset::standard_parameter_names($item);
                my $rev = $found{$item}{'rev'};
                my $valname = $found{$item}{'valname'};
                my $extra = $found{$item}{'extra'};
                my ($middle,$scope,$which,$level,$map,$resource);  
                my $start = $cid.'.';
                if ($key =~ /^\Q$start\E(\[useropt\:($match_username\:$match_domain)\]\.)/) {
                    $middle = $1;
                    $which = $2;
                    $scope = 'user'; 
                } elsif ($key =~ /^\Q$start\E(\[(\w+)\]\.)/) {
                    $middle = $1;
                    $which = $2;
                    $scope = 'section/group';
                } else {
                    $scope = 'all';
                }
                my $what="$stdname=$valname";
                if ($extra) {
                    $what .= "<br/>$extra<br />";
                }
                if ($key =~ /^\Q$start$middle\E\w+\.\Q$item\E$/) {
                    $level = 'general';
                    if ($scope eq 'all') {
                        if (ref($fromparam{$rev}{$scope}) eq 'ARRAY') {
                            unless(grep(/^\Q$what\E$/,@{$fromparam{$rev}{$scope}})) {
                                push(@{$fromparam{$rev}{$scope}},$what);
                            }
                        } else {
                            push(@{$fromparam{$rev}{$scope}},$what);
                        }
                    } else {
                        if (ref($fromparam{$rev}{$scope}{$which}) eq 'ARRAY') {
                            unless (grep(/^\Q$what\E$/,@{$fromparam{$rev}{$scope}{$which}})) {
                                push(@{$fromparam{$rev}{$scope}{$which}},$what);
                            }
                        } else {
                            push(@{$fromparam{$rev}{$scope}{$which}},$what);
                        }
                    }
                    $rowspan{$rev} ++;
                } elsif ($key =~ /^\Q$start$middle\E(.+)___\((all|rec)\).\w+\.\Q$item\E$/) {
                    $level = 'folder';
                    $map = $1;
                    if ($scope eq 'all') {
                        if (ref($bymap{$map}{$rev}{$scope}) eq 'ARRAY') {
                            unless(grep(/^\Q$what\E$/,@{$bymap{$map}{$rev}{$scope}})) {
                                push(@{$bymap{$map}{$rev}{$scope}},$what);
                            }
                        } else {
                            push(@{$bymap{$map}{$rev}{$scope}},$what);
                        }
                    } else {
                        if (ref($bymap{$map}{$rev}{$scope}{$which}) eq 'ARRAY') {
                            unless(grep(/^\Q$what\E$/,@{$bymap{$map}{$rev}{$scope}{$which}})) {
                                push(@{$bymap{$map}{$rev}{$scope}{$which}},$what);
                            }
                        } else {
                            push(@{$bymap{$map}{$rev}{$scope}{$which}},$what);
                        }
                    }
                } elsif ($key =~ /^\Q$start$middle\E(.+)\.\w+\.\Q$item\E$/) {
                    $level = 'resource';
                    $resource = $1;
                    if ($scope eq 'all') {
                        if (ref($byresource{$resource}{$rev}{$scope}) eq 'ARRAY') {
                            unless(grep(/^\Q$what\E$/,@{$byresource{$resource}{$rev}{$scope}})) {
                                push(@{$byresource{$resource}{$rev}{$scope}},$what);
                            }
                        } else {
                            push(@{$byresource{$resource}{$rev}{$scope}},$what);
                        }
                    } else {
                        if (ref($byresource{$resource}{$rev}{$scope}{$which}) eq 'ARRAY') {
                            unless (grep(/^\Q$what\E$/,@{$byresource{$resource}{$rev}{$scope}{$which}})) {
                                push(@{$byresource{$resource}{$rev}{$scope}{$which}},$what);
                            }
                        } else {
                            push(@{$byresource{$resource}{$rev}{$scope}{$which}},$what);
                        }
                    }
                }
            }
        }
        if (keys(%fromparam)) {
            $output .= '<h4>'.&mt('Requirements from general settings').'</h4>'.
                       &Apache::loncommon::start_data_table().
                       &Apache::loncommon::start_data_table_header_row().
                       '<th>'.&mt('Release').'</th><th>'.&mt('Scope').'</th>'.
                       '<th>'.&mt('Extent').'</th><th>'.&mt('Setting').'</th>'.
                       &Apache::loncommon::end_data_table_header_row();
            foreach my $rev (keys(%fromparam)) {
                my ($major,$minor) = split(/\./,$rev);
                ($reqdmajor,$reqdminor) =
                    &Apache::lonrelrequtils::update_reqd_loncaparev($major,$minor,$reqdmajor,$reqdminor);
                $output .=  &Apache::loncommon::start_data_table_row().
                            '<td rowspan="'.$rowspan{$rev}.'">'.$rev.'</td>';
                my $newrow;
                foreach my $scope (@scopeorder) {
                    if (ref($fromparam{$rev}{$scope}) eq 'HASH') {
                         if ($newrow) {
                             $output .= &Apache::loncommon::continue_data_table_row();
                         }
                         $output .= '<td>'.$lt{$scope}.'</td>';
                         foreach my $which (sort(keys(%{$fromparam{$rev}{$scope}}))) {
                             $output .= '<td>'.$which.'</td><td>'.
                                        join('<br />',@{$fromparam{$rev}{$scope}{$which}}).'</td>';
                         }
                         $output .= &Apache::loncommon::end_data_table_row();
                         $newrow = 1;
                    } elsif (ref($fromparam{$rev}{$scope}) eq 'ARRAY') {
                         if ($newrow) {
                             $output .= &Apache::loncommon::continue_data_table_row();
                         }
                         $output .= '<td>'.$lt{$scope}.'</td><td>&nbsp;</td><td>'.
                                    join('<br />',@{$fromparam{$rev}{$scope}}).'</td>'.
                                    &Apache::loncommon::end_data_table_row();
                         $newrow = 1;
                    }
                }
            }
            $output .= &Apache::loncommon::end_data_table().'<br />';
        }
    }

    my %comm_blocks =  &Apache::lonnet::dump('comm_block',$cdom,$cnum);
    my $now = time;
    if (keys(%comm_blocks) > 0) {
        foreach my $block (keys(%comm_blocks)) {
            if ($block =~ /^firstaccess____(.+)$/) {
                my $rev = $Apache::lonnet::needsrelease{'course:commblock:timer'};
                if (ref($comm_blocks{$block}) eq 'HASH') {
                    push(@{$fromblocks{'timer'}{$rev}},&unescape($comm_blocks{$block}{'event'}).
                         ' '.&mt('set by [_1]',
                                 &Apache::loncommon::plainname(split(/:/,$comm_blocks{$block}{'setter'}))));
                }
                next;
            } elsif ($block =~ /^(\d+)____(\d+)$/) {
                my ($start,$end) = ($1,$2);
                next if ($end < $now);
            }
            if (ref($comm_blocks{$block}) eq 'HASH') {
                if (ref($comm_blocks{$block}{'blocks'}) eq 'HASH') {
                    if (ref($comm_blocks{$block}{'blocks'}{'docs'}) eq 'HASH') {
                        if (keys(%{$comm_blocks{$block}{'blocks'}{'docs'}}) > 0) {
                            my $rev = $Apache::lonnet::needsrelease{'course:commblock:docs'};
                            push(@{$fromblocks{'docs'}{$rev}},&unescape($comm_blocks{$block}{'event'}).
                                 ' '.
                                 &mt('set by [_1]',
                                     &Apache::loncommon::plainname(split(/:/,$comm_blocks{$block}{'setter'}))));
                        }
                    } elsif ($comm_blocks{$block}{'blocks'}{'printout'} eq 'on') {
                        my $rev = $Apache::lonnet::needsrelease{'course:commblock:printout'};
                        push(@{$fromblocks{'printout'}{$rev}},&unescape($comm_blocks{$block}{'event'}).
                             ' '.
                             &mt('set by [_1]',
                                 &Apache::loncommon::plainname(split(/:/,$comm_blocks{$block}{'setter'}))));

                    }
                }
            }
        }
        if (keys(%fromblocks)) {
            my %lt = (
                       docs     => 'Content blocking',
                       printout => 'Printout generation',
                       timer    => 'Timed quiz trigger',
                     );
            $output .= '<h4>'.&mt('Requirements from exam blocking').'</h4>'.
                       &Apache::loncommon::start_data_table().
                       &Apache::loncommon::start_data_table_header_row().
                       '<th>'.&mt('Release').'</th><th>'.&mt('Setting').'</th>'.
                       '<th>'.&mt('Event(s)').'</th>'.
                       &Apache::loncommon::end_data_table_header_row();
            foreach my $type ('docs','printout','timer') {
                if (ref($fromblocks{$type}) eq 'HASH') {
                    foreach my $rev (keys(%{$fromblocks{$type}})) {
                        my ($major,$minor) = split(/\./,$rev);
                        ($reqdmajor,$reqdminor) =
                            &Apache::lonrelrequtils::update_reqd_loncaparev($major,$minor,$reqdmajor,$reqdminor);
                        $output .= &Apache::loncommon::start_data_table_row().
                                   '<td>'.$rev.'</td><td>'.$lt{$type}.'</td><td>';
                        foreach my $event (sort(@{$fromblocks{$type}{$rev}})) {
                            $output .= $event.'<br />';
                        }
                        $output =~ s{\Q<br />\E$}{};
                        $output .= '</td>'.&Apache::loncommon::end_data_table_row();
                    }
                }
            }
            $output .= &Apache::loncommon::end_data_table().'<br />';
        }
    }

    if (defined($navmap)) {
        my %anonsubms=&Apache::lonnet::dump('nohist_anonsurveys',$cdom,$cnum);
        my $rev_anonsurv=$Apache::lonnet::needsrelease{'parameter:type:anonsurvey::'};
        my %randtrysubms=&Apache::lonnet::dump('nohist_randomizetry',$cdom,$cnum);
        my $rev_randtry=$Apache::lonnet::needsrelease{'parameter:type:randomizetry::'};
        my $rev_exttool=$Apache::lonnet::needsrelease{'course:courserestype:exttool'};
        my $stdtype=&Apache::lonparmset::standard_parameter_types('type');
        my $stdname=&Apache::lonparmset::standard_parameter_names('type');
        my $valanon=&get_param_description($stdtype,'anonsurvey');
        my $valrandtry=&get_param_description($stdtype,'randomizetry');
        my %checkedrev;
        foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() || $_[0]->is_tool() },1,0)) {
            my @parts = @{$res->parts()};
            my $symb = $res->symb();
            my $enclosing_map = &Apache::lonnet::declutter($res->enclosing_map_src());
            if ($res->is_tool()) {
                my $rev = $rev_exttool;
                $bycrsrestype{$symb}{$rev} = &mt('External Tool');
                $allmaps{$enclosing_map} = 1;
                next;
            }
            foreach my $part (@parts) {
                if (exists($anonsubms{$symb."\0".$part})) {
                    my $rev = $rev_anonsurv;
                    my $what="$stdname=$valanon";
                    if (ref($bysubmission{$symb}{$rev}) eq 'ARRAY') {
                        unless (grep(/^\Q$what\E/,@{$bysubmission{$symb}{$rev}})) {
                            push(@{$bysubmission{$symb}{$rev}},$what);
                        }
                    } else {
                        push(@{$bysubmission{$symb}{$rev}},$what);
                    }
                    $allmaps{$enclosing_map} = 1;
                    unless ($checkedrev{'anonsurvey'}) {
                        my ($major,$minor) = split(/\./,$rev);
                        ($reqdmajor,$reqdminor) =
                            &Apache::lonrelrequtils::update_reqd_loncaparev($major,$minor,
                                                                            $reqdmajor,$reqdminor);
                        $checkedrev{'anonsurvey'} = 1;
                    }
                }
                if (exists($randtrysubms{$symb."\0".$part})) {
                    my $rev = $rev_randtry;
                    my $what="$stdname=$valrandtry";
                    if (ref($bysubmission{$symb}{$rev}) eq 'ARRAY') {
                        unless (grep(/^\Q$what\E/,@{$bysubmission{$symb}{$rev}})) {
                            push(@{$bysubmission{$symb}{$rev}},$what);
                        }
                    } else {
                        push(@{$bysubmission{$symb}{$rev}},$what);
                    }
                    $allmaps{$enclosing_map} = 1;
                    unless ($checkedrev{'randomizetry'}) {
                        my ($major,$minor) = split(/\./,$rev);
                        ($reqdmajor,$reqdminor) =
                            &Apache::lonrelrequtils::update_reqd_loncaparev($major,$minor,
                                                                            $reqdmajor,$reqdminor);
                        $checkedrev{'randomizetry'} = 1;
                    }
                }
            }
            my %responses = $res->responseTypes();
            foreach my $key (keys(%responses)) {
                if (exists($Apache::lonrelrequtils::checkresponsetypes{$key})) {
                    my $rev = $Apache::lonrelrequtils::checkresponsetypes{$key};
                    unless ($checkedrev{$key}) {
                        my ($major,$minor) = split(/\./,$rev);
                        ($reqdmajor,$reqdminor) =
                            &Apache::lonrelrequtils::update_reqd_loncaparev($major,$minor,
                                                                            $reqdmajor,$reqdminor);
                        $checkedrev{$key} = 1;
                    }
                    push(@{$byresponsetype{$symb}{$rev}},$key);
                    $allmaps{$enclosing_map} = 1;
                }
            }
        }
        if (keys(%byresource) > 0) {
            foreach my $symb (keys(%byresource)) {
                my ($map,$resid,$resurl)=&Apache::lonnet::decode_symb($symb);
                $allmaps{$map} = 1;
            }
        }
        if (keys(%bymap) > 0) {
            foreach my $map (keys(%bymap)) {
                $allmaps{$map} = 1;
            }
        }
        foreach my $map (keys(%allmaps)) {
            my $mapres = $navmap->getResourceByUrl($map);
            if (ref($mapres)) {
                my $mapsymb = $mapres->symb();
                $toshow{$mapsymb} = 1;
                my $pcslist = $mapres->map_hierarchy();
                if ($pcslist ne '') {
                    foreach my $pc (split(/,/,$pcslist)) {
                        my $res = $navmap->getByMapPc($pc);
                        if (ref($res)) {
                            my $symb = $res->symb();
                            unless ($symb eq '______') {
                                $toshow{$symb} = 1;
                            }
                        }
                    }
                }
            }
        }
    }
    my $supptools = &Apache::lonnet::count_supptools($cnum,$cdom,1,1);
    my $mapres_header = '<h4>'.
                        &mt('Requirements for specific folders or resources').
                        '</h4>';
    if ((keys(%toshow) > 0) || (keys(%byresource) > 0) || 
        (keys(%bysubmission) > 0) || (keys(%byresponsetype))) {
        $output .= $mapres_header;
    }
    my $top_header = '<h3>'.&mt('LON-CAPA version dependencies').'</h3>';
    my $title = 'Version Constraints';
    my $start_page =
        &Apache::loncommon::start_page($title,undef,{'only_body' => 1,});
    $r->print($start_page.$top_header);
    if ($output) {
        $r->print($output);
        if (defined($navmap) || $supptools) {
            &show_contents_view($r,$navmap,$cid,\%toshow,\%bymap,\%byresource,\%bysubmission,
                                \%byresponsetype,\%bycrsrestype,\@scopeorder,\%lt,$supptools);
        }
        $r->print('<br /><br />'); 
    } else {
        $r->print('<p class="LC_info">'.
                  &mt('No version requirements from resource content or settings.').
                  '</p>'); 
    }
    $r->print(&Apache::loncommon::end_page());
    my ($currmajor,$currminor) = split(/\./,$loncaparev);
    if (($currmajor != $reqdmajor) || ($currminor != $reqdminor)) {
        return 1;
    }
    return;
}

sub show_contents_view {
    my ($r,$navmap,$cid,$toshow,$bymap,$byresource,$bysubmission,$byresponsetype,
        $bycrsrestype,$scopeorder,$lt,$supptools) = @_;
    my $location=&Apache::loncommon::lonhttpdurl("/adm/lonIcons");
    my $whitespace = '<img src="'.$location.'/whitespace_21.gif" alt="" />';
    my $showmaincontent;
    if ((ref($navmap)) &&
        ((keys(%{$toshow}) > 0) || (keys(%{$byresource}) > 0) ||
         (keys(%{$bysubmission}) > 0) || (keys(%{$byresponsetype}) > 0) ||
         (keys(%{$bycrsrestype}) > 0))) {
        $showmaincontent = 1;
    }
    if ($showmaincontent || $supptools) {
        $r->print(&Apache::loncommon::start_data_table());
    }
    if ($showmaincontent) {
        my $icon = '<img src="'.$location.'/navmap.folder.open.gif" alt="" />';
        my $topmap = $env{'course.'.$cid.'.url'};
        $r->print(&Apache::loncommon::start_data_table_header_row().
                  '<th>'.&mt('Location').'</th><th>'.&mt('Release').'</th>'.
                  '<th>'.&mt('Attribute/Setting').'</th>'.
                  &Apache::loncommon::end_data_table_header_row().
                  &Apache::loncommon::start_data_table_row().
                  '<td>&nbsp;'.$icon.'&nbsp;'.&mt('Main Content').'</td>');
        &releases_by_map($r,$bymap,$topmap,$scopeorder,$lt);
        $r->print(&Apache::loncommon::end_data_table_row());
        my $it=$navmap->getIterator(undef,undef,undef,1,1,undef);
        my $curRes;
        my $depth = 0;
        my %parent = ();
        my $startcount = 5;
        my $lastcontainer = $startcount;
        while ($curRes = $it->next()) {
            if ($curRes == $it->BEGIN_MAP()) {
                $depth++;
                $parent{$depth}= $lastcontainer;
            }
            if ($curRes == $it->END_MAP()) {
                $depth--;
                $lastcontainer = $parent{$depth};
            }
            my $indent;
            for (my $i=0; $i<$depth; $i++) {
                $indent.= $whitespace;
            }
            if (ref($curRes)) {
                my $symb = $curRes->symb();
                my $ressymb = $symb;
                my $srcf = $curRes->src();
                my $title = &Apache::lonnet::gettitle($srcf);
                if (($curRes->is_sequence()) || ($curRes->is_page())) {
                    next unless($toshow->{$symb});
                    my ($parent,$ind,$url) = &Apache::lonnet::decode_symb($symb);
                    $icon =  '<img src="'.$location.'/navmap.folder.open.gif" alt="" />';
                    if ($curRes->is_page()) {
                        $icon = '<img src="'.$location.'/navmap.page.open.gif" alt="" />';
                    }
                    my $rowspan = 1;
                    if (ref($bymap->{$url}) eq 'HASH') {
                        $rowspan = scalar(keys(%{$bymap->{$url}}));
                    }
                    $r->print(&Apache::loncommon::start_data_table_row().
                              '<td rowspan="'.$rowspan.'">'.$indent.$icon.'&nbsp;'.$title.'</td>');
                    &releases_by_map($r,$bymap,$url,$scopeorder,$lt);
                    $r->print(&Apache::loncommon::end_data_table_row());
                } else {
                    my $rowspan;
                    if (ref($byresource->{$symb}) eq 'HASH') {
                        $rowspan += scalar(keys(%{$byresource->{$symb}}));
                    }
                    if (ref($bysubmission->{$symb}) eq 'HASH') {
                        $rowspan += scalar(keys(%{$bysubmission->{$symb}}));
                    }
                    if (ref($byresponsetype->{$symb}) eq 'HASH') {
                        $rowspan += scalar(keys(%{$byresponsetype->{$symb}}));
                    }
                    if (ref($bycrsrestype->{$symb}) eq 'HASH') {
                        $rowspan += scalar(keys(%{$bycrsrestype->{$symb}}));
                    }
                    next if (!$rowspan);
                    $icon = '<img class="LC_contentImage" src="'.$location.'/problem.gif" alt="'.
                            &mt('Problem').'" />';
                    $r->print(&Apache::loncommon::start_data_table_row().
                              '<td rowspan="'.$rowspan.'">'.$indent.$icon.'&nbsp;'.$title.'</td>');
                    my $newrow;
                    if (ref($byresource->{$symb}) eq 'HASH') {
                        foreach my $rev (sort(keys(%{$byresource->{$symb}}))) {
                            if ($newrow) {
                                $r->print(&Apache::loncommon::continue_data_table_row());
                            }
                            $r->print('<td valign="middle">'.$rev.'</td><td>');
                            if (ref($byresource->{$symb}{$rev}) eq 'HASH') {
                                $r->print('<table border="0">');
                                foreach my $scope (@{$scopeorder}) {
                                    if (ref($byresource->{$symb}{$rev}{$scope}) eq 'HASH') {
                                        $r->print('<tr><td>'.&mt('Setting - scope: [_1]',$lt->{$scope}).'</td>');
                                        foreach my $which (sort(keys(%{$byresource->{$symb}{$rev}{$scope}}))) {
                                            $r->print('<td>'.$which.'</td><td>'.
                                                join('<br />',@{$byresource->{$symb}{$rev}{$scope}{$which}}).
                                                      '</td>');
                                        }
                                        $r->print('</tr>');
                                    } elsif (ref($byresource->{$symb}{$rev}{$scope}) eq 'ARRAY') {
                                        $r->print('<tr><td>'.&mt('Setting - scope: [_1]',$lt->{$scope}).'</td>'.
                                                  '<td>&nbsp;</td><td>'.
                                                  join('<br />',@{$byresource->{$symb}{$rev}{$scope}}).'</td></tr>');
                                    }
                                }
                                $r->print('</table>');
                            }
                            $r->print('</td>');
                            $r->print(&Apache::loncommon::end_data_table_row());
                            $newrow = 1;
                        }
                    }
                    if (ref($bysubmission->{$symb}) eq 'HASH') {
                        foreach my $rev (sort(keys(%{$bysubmission->{$symb}}))) {
                            if ($newrow) {
                                $r->print(&Apache::loncommon::continue_data_table_row());
                            }
                            $r->print('<td>'.$rev.'</td><td>');
                            if (ref($bysubmission->{$symb}{$rev}) eq 'ARRAY') {
                                $r->print(&mt('Submissions to: ').' '.
                                         join(', ',@{$bysubmission->{$symb}{$rev}}));
                            }
                            $r->print('</td>');
                            $r->print(&Apache::loncommon::end_data_table_row());
                            $newrow = 1;
                        }
                    }
                    if (ref($byresponsetype->{$symb}) eq 'HASH') {
                        foreach my $rev (sort(keys(%{$byresponsetype->{$symb}}))) {
                            if ($newrow) {
                                $r->print(&Apache::loncommon::continue_data_table_row());
                            }
                            $r->print('<td>'.$rev.'</td><td>');
                            if (ref($byresponsetype->{$symb}{$rev}) eq 'ARRAY') {
                                $r->print(&mt('Response Type(s): ').' '.
                                         join('<br />',@{$byresponsetype->{$symb}{$rev}}));
                            }
                            $r->print('</td>');
                        }
                        $r->print(&Apache::loncommon::end_data_table_row());
                        $newrow = 1;
                    }
                    if (ref($bycrsrestype->{$symb}) eq 'HASH') {
                        foreach my $rev (sort(keys(%{$bycrsrestype->{$symb}}))) {
                            if ($newrow) {
                                $r->print(&Apache::loncommon::continue_data_table_row());
                            }
                            $r->print('<td>'.$rev.'</td><td>'.$bycrsrestype->{$symb}{$rev}.'</td>');
                        }
                        $r->print(&Apache::loncommon::end_data_table_row());
                    }
                }
            }
        }
    }
    if ($supptools) {
        my $icon = '<img src="'.$location.'/navmap.folder.open.gif" alt="" />';
        $r->print(&Apache::loncommon::start_data_table_header_row().
                  '<th>'.&mt('Location').'</th><th>'.&mt('Release').'</th>'.
                  '<th>'.&mt('Resource Type').'</th>'.
                  &Apache::loncommon::end_data_table_header_row().
                  &Apache::loncommon::start_data_table_row().
                  '<td>&nbsp;'.$icon.'&nbsp;'.&mt('Supplemental Content').'</td>'.
                  '<td valign="middle">'.
                  $Apache::lonrelrequtils::exttool{'major'}.'.'.
                  $Apache::lonrelrequtils::exttool{'minor'}.
                  '</td><td>'.&mt('[quant,_1,External Tool,External Tools]',
                                  $supptools).'</td>'.
                  &Apache::loncommon::end_data_table_row());
    }
    if ($showmaincontent || $supptools) {
        $r->print(&Apache::loncommon::end_data_table());
    }
    return;
}

sub releases_by_map {
    my ($r,$bymap,$url,$scopeorder,$lt) = @_;
    return unless ((ref($bymap) eq 'HASH') && (ref($scopeorder) eq 'ARRAY'));
    my $newrow = 0;
    if (ref($bymap->{$url}) eq 'HASH') {
        foreach my $rev (sort(keys(%{$bymap->{$url}}))) {
            if ($newrow) {
                $r->print(&Apache::loncommon::end_data_table_row().
                          &Apache::loncommon::continue_data_table_row());
            }
            $r->print('<td valign="middle">'.$rev.'</td><td>');
            if (ref($bymap->{$url}{$rev}) eq 'HASH') {
                $r->print('<table border="0">');
                foreach my $scope (@{$scopeorder}) {
                    if (ref($bymap->{$url}{$rev}{$scope}) eq 'HASH') {
                        $r->print('<tr><td>'.&mt('Setting - scope: [_1]',$lt->{$scope}).'</td>');
                        foreach my $which (sort(keys(%{$bymap->{$url}{$rev}{$scope}}))) {
                            $r->print('<td>'.$which.'</td><td>'.
                                      join('<br />',@{$bymap->{$url}{$rev}{$scope}{$which}}).
                                      '</td>');
                        }
                        $r->print('</tr>');
                    } elsif (ref($bymap->{$url}{$rev}{$scope}) eq 'ARRAY') {
                        $r->print('<tr><td>'.&mt('Setting - scope: [_1]',$lt->{$scope}).
                                  '</td><td>&nbsp;</td><td>'.
                                  join('<br />',@{$bymap->{$url}{$rev}{$scope}}).'</td></tr>');
                    }
                }
                $r->print('</table>');
            }
            $r->print('</td>');
            $newrow = 1;
        }
    } else {
        $r->print('<td colspan="2">&nbsp;</td>');
    }
    return;
}

sub get_param_description {
    my ($stdtype,$value,$regexp) = @_;
    my ($name,$parammatches,$paramstrings,@possibles);
    if ($stdtype =~ /^string/) {
        $paramstrings = &Apache::lonparmset::standard_string_options($stdtype);
    } elsif ($stdtype eq 'date_interval') {
        $paramstrings = &Apache::lonparmset::standard_interval_options($stdtype);
    }
    if ($regexp) {
        if ($stdtype =~ /^string/) {
            $parammatches = &Apache::lonparmset::standard_string_matches($stdtype);
        } elsif ($stdtype eq 'date_interval') {
            $parammatches = &Apache::lonparmset::standard_interval_matches($stdtype);
        }
        if (ref($parammatches) eq 'ARRAY') {
            @possibles = @{$parammatches};
        } else {
            undef($regexp);
            $name = $value;
        }
    }
    unless ($regexp) {
        $name = $value;
        if (ref($paramstrings) eq 'ARRAY') {
            @possibles = @{$paramstrings};
        } else {
            if (($stdtype eq 'date_start') || ($stdtype eq 'date_end')) {
                if ($name == 0) {
                    $name = &mt('Never');
                } elsif (($name ne '') && ($name !~ /\D/)) {
                    $name = &Apache::lonlocal::locallocaltime($name);
                }
            }
            return $name;
        }
    }
    foreach my $possibilities (@possibles) {
        next unless (ref($possibilities) eq 'ARRAY');
        my $gotregexmatch = '';
        if ($regexp) {
            last if ($gotregexmatch);
            my ($item,$pattern) = @{ $possibilities };
            if ($value =~ /$pattern/) {
                if (ref($paramstrings) eq 'ARRAY') {
                    foreach my $possibles (@{$paramstrings}) {
                        next unless (ref($possibles) eq 'ARRAY');
                        my ($thing,$description) = @{$possibles};
                        if ($thing eq $item) {
                            $name = $description;
                            $gotregexmatch = 1;
                            last;
                        }
                    }
                    last if ($gotregexmatch);
                }
            }
        } else {
            my ($thing,$description) = @{ $possibilities };
            if ($thing eq $value) {
                $name = $description;
                last;
            }
        }
    }
    return $name;
}

sub update_releasereq {
    my $readmap = 1;
    my $getrelreq = 1;
    if (ref($modified_courses) eq 'ARRAY') {
        foreach my $item (@{$modified_courses}) {
            if (ref($item) eq 'ARRAY') {
                my ($cdom,$cnum,$chome,$crstype) = @{$item};
                &Apache::lonrelrequtils::modify_course_relreq(undef,undef,$cnum,$cdom,
                                                              $chome,$crstype,$cdom.'_'.$cnum,
                                                              $readmap,$getrelreq);
            }
        }
        $modified_courses = [];
    }
    return OK;
}

sub show_autocoowners {
    my (@currcoown) = @_;
    my $output = '<i><span class="LC_nobreak">'.&mt('Co-ownership is set automatically when a Course Coordinator role[_1] is assigned to official course personnel (from institutional data).','</span><br /><span class="LC_nobreak">').'</span></i>';
    if (@currcoown > 0) { 
        $output .= '<br />'.&mt('Current co-owners are:').'&nbsp;'.
                   join(', ',map { &Apache::loncommon::plainname(split(':',$_)); } (@currcoown));
    } else {
        $output .= '<br />'.&mt('Currently no co-owners.');
    } 
    return $output;
}

sub coowner_invitations {
    my ($cnum,$cdom,$currcoownref,$noedit) = @_;
    my ($output,@pendingcoown,@othercoords,@currcoown);
    my $pendingcoowners =
        $env{'course.'.$env{'request.course.id'}.'.internal.pendingco-owners'};
    if ($pendingcoowners) {
        @pendingcoown = split(',',$pendingcoowners);
    }
    if (ref($currcoownref) eq 'ARRAY') {
        @currcoown = @{$currcoownref};
    }
    my $disabled;
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    my $ccrole = 'cc';
    my %ccroles = &Apache::lonnet::get_my_roles($cnum,$cdom,undef,undef,[$ccrole]);
    foreach my $key (sort(keys(%ccroles))) {
        my ($ccname,$ccdom,$role) = split(':',$key);
        next if ($key eq $env{'user.name'}.':'.$env{'user.domain'}.':'.$ccrole);
        unless (grep(/^\Q$ccname\E:\Q$ccdom\E$/,@currcoown,@pendingcoown)) {
            push(@othercoords,$ccname.':'.$ccdom);
        }
    }
    my $coowner_rows = @currcoown + @pendingcoown + @othercoords;
    if ($coowner_rows) {
        $output .= &Apache::loncommon::start_data_table();
        if (@currcoown) {
            $output .= &Apache::loncommon::start_data_table_row().
                          '<td><i>'.&mt('Current co-owners').'</i></td><td>';
            foreach my $person (@currcoown) {
                my ($co_uname,$co_dom) = split(':',$person);
                $output .= '<span class="LC_nobreak"><label><input type="checkbox" name="coowners" checked="checked" value="'.$person.'"'.$disabled.' />'.&Apache::loncommon::plainname($co_uname,$co_dom).'</label></span>'.('&nbsp;'x2).' ';
            }
            $output .= '</td>'.
                          &Apache::loncommon::end_data_table_row();
        }
        if ($pendingcoowners) {
            $output .= &Apache::loncommon::start_data_table_row().
                          '<td><i>'.&mt('Invited as co-owners [_1](agreement pending)','<br />').'</i></td><td>';
            foreach my $person (@pendingcoown) {
                my ($co_uname,$co_dom) = split(':',$person);
                $output .= '<span class="LC_nobreak"><label><input type="checkbox" name="pendingcoowners" checked="checked" value="'.$person.'"'.$disabled.' />'.&Apache::loncommon::plainname($co_uname,$co_dom).'</label></span>'.('&nbsp;'x2).' ';
            }
            $output .= '</td>'.
                       &Apache::loncommon::end_data_table_row();
        }
        if (@othercoords) {
            $output .= &Apache::loncommon::start_data_table_row().
                          '<td><i>'.&mt('Invite other Coordinators [_1]to become co-owners','<br />').'</i></td><td>';
            foreach my $person (@othercoords) {
                my ($co_uname,$co_dom) = split(':',$person);
                $output .= '<span class="LC_nobreak"><label><input type="checkbox" name="invitecoowners" value="'.$person.'"'.$disabled.' />'.&Apache::loncommon::plainname($co_uname,$co_dom).'</label></span>'.('&nbsp;'x2).' ';
            }
            $output .= '</td>'.
                          &Apache::loncommon::end_data_table_row();
        }
        $output .= &Apache::loncommon::end_data_table();
    } else {
        $output = &mt('There are no coordinators to select as co-owners');
    }
    return $output;
}

sub manage_coownership  {
    my ($cnum,$cdom,$currcoownref,$noedit) = @_;
    my (@pendingcoown,@currcoown);
    my $pendingcoowners =
        $env{'course.'.$env{'request.course.id'}.'.internal.pendingco-owners'};
    if ($pendingcoowners) {
        @pendingcoown = split(',',$pendingcoowners);
    }
    if (ref($currcoownref) eq 'ARRAY') {
        @currcoown = @{$currcoownref};
    }
    my $disabled;
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    my ($is_coowner,$is_pending,$output);
    my $uname = $env{'user.name'};
    my $udom = $env{'user.domain'};
    if (grep(/^\Q$uname\E:\Q$udom\E$/,@currcoown)) {
        $is_coowner = 1;
    }
    if (grep(/^\Q$uname\E:\Q$udom\E$/,@pendingcoown)) {
        $is_pending = 1;
    }
    if (@currcoown && ($is_coowner || $is_pending)) {
        $output = &Apache::loncommon::start_data_table();
    }
    if (@currcoown) {
        if ($is_coowner || $is_pending) { 
            $output .= &Apache::loncommon::start_data_table().
                       &Apache::loncommon::start_data_table_row().'<td>';
        }
        $output .= &mt('Current co-owners are:').'&nbsp;'.
                   join(', ', map { &Apache::loncommon::plainname(split(':',$_)); } (@currcoown));  
        if ($is_coowner || $is_pending) {
            $output .= '</td>'.&Apache::loncommon::end_data_table_row(); 
        }
    }
    if ($is_coowner || $is_pending) {
        if (@currcoown) { 
            $output .= &Apache::loncommon::start_data_table_row().'<td>';
        }
        $output .= '<span class="LC_nobreak">';
        if ($is_coowner) {
            $output .= &mt('You are currently a co-owner:').'&nbsp;<label><input type="checkbox" name="remove_coowner" value="'.$uname.':'.$udom.'" />'.&mt('Discontinue?').'</label>';
        } else {
            $output .= &mt('The course owner has invited you to become a co-owner:').'&nbsp;<label><input type="radio" name="pending_coowner" value="accept"'.$disabled.' />'.&mt('Accept?').'</label>'.('&nbsp;'x2).
                       '<label><input type="radio" name=pending_coowner" value="decline"'.$disabled.' />'.&mt('Decline?').'</label>';
        }
        $output .= '</span>';
        if (@currcoown) {
            $output .= '</td>'.&Apache::loncommon::end_data_table_row();
        }
    }
    if (@currcoown && ($is_coowner || $is_pending)) {
        $output .= &Apache::loncommon::end_data_table();
    }
    return $output;
}

sub print_localization {
    my ($cdom,$settings,$ordered,$itemtext,$rowtotal,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($ordered) eq 'ARRAY') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    my %items = (
        languages => {
                        text => '<b>'.&mt($itemtext->{'languages'}).'</b><br />'.
                                &mt("(overrides individual user preference)"),
                        input => 'selectbox',
                     }, 
        timezone => {
                        text  => '<b>'.&mt($itemtext->{'timezone'}).'</b>',
                        input => 'selectbox',
                    },
        datelocale  => { 
                         text => '<b>'.&mt($itemtext->{'datelocale'}).'</b>',
                         input => 'selectbox',
                       },
    );
    my ($datatable,$disabled);
    my $count = 0;
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    foreach my $item (@{$ordered}) {
        $count ++;
        my $colspan;
        unless ($item eq 'languages') {
            $colspan = 2;
        }
        $datatable .= &item_table_row_start($items{$item}{text},$count,undef,$colspan);
        if ($item eq 'timezone') {
            my $includeempty = 1;
            my $timezone = &Apache::lonlocal::gettimezone();
            my $onchange;
            unless ($noedit) {
               $onchange = ' onchange="javascript:toggleTimeZone();"';
            }
            my $id = ' id="LC_set_timezone"';
            $datatable .= 
                &Apache::loncommon::select_timezone($item,$timezone,$onchange,
                                                    $includeempty,$id,$disabled);
            my $tzsty = 'none';
            if ($timezone ne '') {
                $tzsty = 'block';
            }
            $datatable .= '<div id="LC_tzoverdiv" style="display:'.$tzsty.';">'.
                          '<span class="LC_nobreak">'.
                          &mt('Override individual user preference?').
                          &yesno_radio('tzover',$settings,undef,1,'',$noedit).
                          '</span></div>';
        } elsif ($item eq 'datelocale') {
            my $includeempty = 1;
            my $locale_obj = &Apache::lonlocal::getdatelocale();
            my $currdatelocale;
            if (ref($locale_obj)) {
                $currdatelocale = $locale_obj->id();
            }
            $datatable .= 
                &Apache::loncommon::select_datelocale($item,$currdatelocale,
                                                      undef,$includeempty,$disabled);
        } else {
            if ($settings->{$item} eq '') {
                unless ($noedit) {
                    $datatable .= '</td><td align="right">'.
                        &Apache::loncommon::select_language('languages_0','',1);
                }
            } else {
                my $num = 0;
                my @languages = split(/\s*[,;:]\s*/,$settings->{$item});
                $datatable .= '</td><td align="right"><br />'.
                              &Apache::loncommon::start_data_table();
                if (@languages > 0) {
                    my %langchoices = &get_lang_choices();
                    foreach my $lang (@languages) {
                        my $showlang = $lang;
                        if (exists($langchoices{$lang})) {
                            $showlang = $langchoices{$lang};
                        }
                        $datatable .=
                            &Apache::loncommon::start_data_table_row().
                            '<td align="left"><span class="LC_nobreak">'.
                            &mt('Language:').'<b>&nbsp;'.$showlang.
                            '</b><input type="hidden" name="languages_'.$num.
                            '" value="'.$lang.'" /></span><br />'.
                            '<span class="LC_nobreak"><label><input type="checkbox" '.
                            'name="languages_delete" value="'.$num.'"'.$disabled.' />'.
                            &mt('Delete').'</label></span></td>'.
                            &Apache::loncommon::end_data_table_row();
                            $num ++;
                    }
                }
                unless ($noedit) {
                    $datatable .=
                              &Apache::loncommon::start_data_table_row().
                              '<td align="left"><span class="LC_nobreak">'.
                              &mt('Additional language:'). '</span><br />'.
                              &Apache::loncommon::select_language('languages_'.$num,'',1).
                              '<input type="hidden" name="languages_total" value="'.$num.'" />'.
                              '</td>'.&Apache::loncommon::end_data_table_row();
                }
                $datatable .= &Apache::loncommon::end_data_table().'<br />';
            }
        }
        $datatable .= &item_table_row_end();
    }
    $$rowtotal += scalar(@{$ordered});
    return $datatable;
}

sub get_lang_choices {
    my %langchoices;
    foreach my $id (&Apache::loncommon::languageids()) {
        my $code = &Apache::loncommon::supportedlanguagecode($id);
        if ($code) {
            $langchoices{$code} = &Apache::loncommon::plainlanguagedescription($id);
        }
    }
    return %langchoices;
}

sub print_feedback {
    my ($position,$cdom,$settings,$ordered,$itemtext,$rowtotal,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($ordered) eq 'ARRAY') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    my %items = (
        'question.email' => {
                   text => '<b>'.&mt($itemtext->{'question.email'}).'</b>',
                   input => 'textbox',
                   size  => '50',
                 },

        'comment.email'  => {
                   text => '<b>'.&mt($itemtext->{'comment.email'}).'</b>',
                   input => 'textbox',
                   size  => '50',
                 },

        'policy.email'   => {
                   text => '<b>'.&mt($itemtext->{'policy.email'}).'</b>',
                   input => 'textbox',
                   size  => '50',
                 },
    );
    my $datatable;
    my $count = 0;
    my ($cnum) = &get_course();
    my %sections = &Apache::loncommon::get_sections($cdom,$cnum);
    my @sections = sort( { $a <=> $b } keys(%sections));
    my %lt = &Apache::lonlocal::texthash (
                                           currone  => 'Current recipient:',
                                           currmult => 'Current recipients:',
                                           add      => 'Additional recipient:',
                                           del      => 'Delete?',
                                           sec      => 'Sections:',
                                         );
    my $disabled;
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    foreach my $item (@{$ordered}) {
        $count ++;
        if ($position eq 'top') {
        	$datatable .= &item_table_row_start($items{$item}{text},$count);
        } else {
        	$datatable .= &item_table_row_start($items{$item}{text}."<br/>(Custom text)",$count, "advanced",2);
        }
        if ($position eq 'top') {
            my $includeempty = 0;
            $datatable .= '</td><td align="right">'.
                          &user_table($cdom,$item,\@sections,
                                      $settings->{$item},\%lt,$noedit);
        } else {
            $datatable .= &Apache::lonhtmlcommon::textbox($item.'.text',
                              $settings->{$item.'.text'},$items{$item}{size},$disabled);  
        }
        $datatable .= &item_table_row_end();
    }
    $$rowtotal += scalar(@{$ordered});
    return $datatable;
}

sub user_table {
    my ($cdom,$item,$sections,$currvalue,$lt,$noedit) = @_;
    my $output;
    if ($currvalue eq '') {
        unless ($noedit) {
            $output .= &select_recipient($item,'0',$cdom,$sections);
        }
    } else {
        my $num = 0;
        my @curr = split(/,/,$currvalue);
        $output .= '<table class="LC_data_table">';
        my ($currusers);
        my $disabled;
        if ($noedit) {
            $disabled = ' disabled="disabled"';
        }
        foreach my $val (@curr) {
            next if ($val eq '');
            my ($uname,$udom,$seclist) = ($val =~ /^($match_username):($match_domain)(\(?[^\)]*\)?)$/);
            my @selsec;
            if ($seclist) {
                $seclist =~ s/(^\(|\)$)//g;
                @selsec = split(/\s*;\s*/,$seclist);
            }
            $currusers .= '<tr>'.
                        '<td valign="top"><span class="LC_nobreak">'.
                        '<label><input type="checkbox" '.
                        'name="'.$item.'_delete" value="'.$num.'"'.$disabled.' />'.
                        $lt->{'del'}.'</label>'.
                        '<input type="hidden" name="'.$item.'_user_'.
                        $num.'" value="'.$uname.':'.$udom.'" />'.('&nbsp;'x2).
                        &Apache::loncommon::aboutmewrapper(
                            &Apache::loncommon::plainname($uname,$udom,'firstname'),
                            $uname,$udom,'aboutuser');
            if (ref($sections) eq 'ARRAY') {
                if (@{$sections}) {
                    $currusers.= ('&nbsp;'x3).$lt->{'sec'}.'&nbsp;'.
                                  &select_sections($item,$num,$sections,
                                  \@selsec,$noedit);
                }
            }
            $currusers .= '</span></td></tr>';
            $num ++;
        }
        if ($num) {
            $output .= '<tr>'.
                       '<td align="left"><i>';
            if ($num == 1) {
                $output .= $lt->{'currone'};
            } else {
                $output .= $lt->{'currmult'};
            }
            $output .= '</i><br />'.
                          '<table>'.$currusers.'</table></td>'.
                          '</tr>';
        }
        unless ($noedit) {
            $output .= 
                  '<tr>'.
                  '<td align="left"><span class="LC_nobreak"><i>'.
                  $lt->{'add'}.'</i></span><br />'.
                  &select_recipient($item,$num,$cdom,$sections).
                  '<input type="hidden" name="'.$item.'_total" value="'.$num.'" />'.
                  '</td></tr>';
        }
        $output .= '</table>';
    }
    return $output;
}

sub select_recipient {
    my ($item,$num,$cdom,$sections,$selected,$includeempty) = @_;
    my $domform = &Apache::loncommon::select_dom_form($cdom,$item.'_udom_'.$num,$includeempty);
    my $selectlink =
        &Apache::loncommon::selectstudent_link('display',$item.'_uname_'.$num,
                                               $item.'_udom_'.$num,'only');
    my $output = 
        '<table><tr><td align="center">'.&mt('Username').'<br />'.
        '<input type="text" name="'.$item.'_uname_'.$num.'" value="" /></td>'.
        '<td align="center">'.&mt('Domain').'<br />'.$domform.'</td>';
    if (ref($sections) eq 'ARRAY') {
        if (@{$sections}) {
            $output .= '<td align="center">'.&mt('Sections').'<br />'.
                       &select_sections($item,$num,$sections,$selected).'</td>'; 
        }
    }
    $output .= '<td valign="top">'.
               $selectlink.'</td></tr></table>';
    return $output;
}

sub select_sections {
    my ($item,$num,$sections,$selected,$noedit,$allval) = @_;
    my ($output,@currsecs,$allsec,$disabled);
    if (ref($selected) eq 'ARRAY') {
        @currsecs = @{$selected};
    }
    if (!@currsecs) {
        $allsec = ' selected="selected"';
    }
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    if (ref($sections) eq 'ARRAY') {
        if (@{$sections}) {
            my $mult;
            if (@{$sections} > 1) {
                $mult = ' multiple="multiple"';
                my $size;
                if (@{$sections} > 3) {
                    $size = 4;
                } else {
                    $size = 1 + scalar(@{$sections});
                }
                $mult .= ' size="'.$size.'"';
            }
            my $name = $item.'_sections';
            unless ($item eq 'hidetotals') {
                $name .= '_'.$num;
            }
            $output = '<select name="'.$name.'"'.$mult.$disabled.'>'.
                      ' <option value="'.$allval.'"'.$allsec.'>'.&mt('All').'</option>';
            foreach my $sec (@{$sections}) {
                my $is_sel;
                if ((@currsecs) && (grep(/^\Q$sec\E$/,@currsecs))) {
                    $is_sel = ' selected="selected"';
                }
                $output .= '<option value="'.$sec.'"'.$is_sel.'>'.$sec.'</option>';
            }
            $output .= '</select>';
        }
    }
    return $output;
}

sub print_discussion {
    my ($cdom,$settings,$ordered,$itemtext,$rowtotal,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($ordered) eq 'ARRAY') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    my %items = (
        'plc.roles.denied' => {
                   text => '<span class="LC_nobreak"><b>'.&mt($itemtext->{'plc.roles.denied'}).'</b>'.
                           &Apache::loncommon::help_open_topic("Course_Disable_Discussion").'</span><br />'.
                           &mt('(role-based)'),
                   input => 'checkbox',
                 },

        'plc.users.denied'  => {
                   text => '<b>'.&mt($itemtext->{'plc.users.denied'}).'</b><br />'.
                           &mt('(specific user(s))'),
                   input => 'checkbox',
                 },

        'pch.roles.denied'   => {
                   text => '<span class="LC_nobreak"><b>'.&mt($itemtext->{'pch.roles.denied'}).'</b>'.
                           &Apache::loncommon::help_open_topic("Course_Disable_Discussion").'</span><br />'.
                           &mt('(role-based)'),
                   input => 'checkbox',
                 },

        'pch.users.denied'   => {
                   text => '<b>'.&mt($itemtext->{'pch.users.denied'}).'</b><br />'.
                           &mt('(specific user(s))'),
                   input => 'checkbox',
                 },

        'pac.roles.denied' => {
                   text => '<span class="LC_nobreak"><b>'.&mt($itemtext->{'pac.roles.denied'}).'</b>'.
                           &Apache::loncommon::help_open_topic("Course_Disable_Anonymous_Discussion").'</span><br />'.
                           &mt('(role-based)'),
                   input => 'checkbox',
                 },

        'pac.users.denied'   => {
                   text => '<span class="LC_nobreak"><b>'.&mt($itemtext->{'pac.users.denied'}).'</b><br />'.
                           &mt('(specific user(s))'),
                   input => 'checkbox',
                 },

        'allow_limited_html_in_feedback' => {
                   text => '<b>'.&mt($itemtext->{'allow_limited_html_in_feedback'}).'</b>',
                   input => 'radio',
                 },

        'allow_discussion_post_editing' => {
                   text => '<b>'.&mt($itemtext->{'allow_discussion_post_editing'}).'</b>',
                   input => 'checkbox',
                 },
        'discussion_post_fonts' => {
                   text => '<b>'.&mt($itemtext->{'discussion_post_fonts'}).'</b>',
                   input => 'textbox',
                   size  => '20',
                 },
    );
    my $datatable;
    my $count;
    my ($cnum) = &get_course();
    my %sections = &Apache::loncommon::get_sections($cdom,$cnum);
    my @sections = sort( { $a <=> $b } keys(%sections));
    my %lt = &Apache::lonlocal::texthash (
                                          currone  => 'Disallowed:',
                                          currmult => 'Disallowed:',
                                          add      => 'Disallow more:',
                                          del      => 'Delete?',
                                          sec      => 'Sections:',
                                         );
    foreach my $item (@{$ordered}) {
        $count ++;
        my $colspan;
        if ($item eq 'allow_limited_html_in_feedback') {
            $colspan = 2;
        }
        $datatable .= &item_table_row_start($items{$item}{text},$count,undef,$colspan);
        if ($item eq 'plc.roles.denied') {
            $datatable .= '</td><td align="right">'.
                          '<table>'.&role_checkboxes($cdom,$cnum,$item,$settings,undef,undef,$noedit).
                          '</table>';
        } elsif ($item eq 'plc.users.denied') {
            $datatable .= '</td><td align="right">'.
                          &user_table($cdom,$item,undef,
                                      $settings->{$item},\%lt,$noedit);
        } elsif ($item eq 'pch.roles.denied') {
            $datatable .= '</td><td align="right">'.
                          '<table>'.&role_checkboxes($cdom,$cnum,$item,$settings,undef,undef,$noedit).
                          '</table>';
        } elsif ($item eq 'pch.users.denied') {
            $datatable .= '</td><td align="right">'.
                          &user_table($cdom,$item,undef,
                                      $settings->{$item},\%lt,$noedit);
        } elsif ($item eq 'pac.roles.denied') {
            $datatable .= '</td><td align="right">'.
                          '<table>'.&role_checkboxes($cdom,$cnum,$item,$settings,undef,undef,$noedit).
                          '</table>';
        } elsif ($item eq 'pac.users.denied') {
            $datatable .=  '</td><td align="right">'.
                           &user_table($cdom,$item,undef,
                                      $settings->{$item},\%lt,$noedit);
        } elsif ($item eq 'allow_limited_html_in_feedback') {
            $datatable .= &yesno_radio($item,$settings,undef,undef,undef,$noedit);
        } elsif ($item eq 'allow_discussion_post_editing') {
            $datatable .= '</td><td align="right"><br />'.
                          &Apache::loncommon::start_data_table().
                          &Apache::loncommon::start_data_table_row().
                          '<th align="left">'.&mt('Role').'</th><th>'.
                          &mt('Sections').'</th>'.
                          &Apache::loncommon::end_data_table_row().
                          &role_checkboxes($cdom,$cnum,$item,$settings,1,undef,$noedit).
                          &Apache::loncommon::end_data_table().'<br />';
        } elsif ($item eq 'discussion_post_fonts') {
            $datatable .= '</td><td align="right"><br />'.
                          &Apache::loncommon::start_data_table().
                          &Apache::loncommon::start_data_table_row().
                          '<th align="center">'.&mt('Sum of likes/dislikes').'</th>'.
                          '<th align="center">'.&mt('font-size').'</th>'.
                          '<th align="center">'.&mt('font-weight').'</th>'.
                          '<th align="center">'.&mt('font-style').'</th>'.
                          '<th align="center">'.&mt('Other css').'</th>'.
                          &Apache::loncommon::end_data_table_row().
                          &set_discussion_fonts($cdom,$cnum,$item,$settings,$noedit).
                          &Apache::loncommon::end_data_table().'<br />';
        }
        $datatable .= &item_table_row_end();
    }
    $$rowtotal += scalar(@{$ordered});
    return $datatable;
}

sub role_checkboxes {
    my ($cdom,$cnum,$item,$settings,$showsections,$crstype,$noedit) = @_;
    my @roles = ('st','ad','ta','ep','in');
    if ($crstype eq 'Community') {
        push(@roles,'co');
    } else {
        push(@roles,'cc');
    }
    my $output;
    my (@current,@curr_roles,%currsec,@sections);
    if ($showsections) {
        my %sections = &Apache::loncommon::get_sections($cdom,$cnum);
        @sections = sort( { $a <=> $b } keys(%sections));
    }
    if (ref($settings) eq 'HASH') {
        if ($settings->{$item}) {
            @current = split(',',$settings->{$item});
            if ($showsections) {
                foreach my $role (@current) {
                    if ($role =~ /:/) {
                        my ($trole,$sec) = split(':',$role);
                        push(@curr_roles,$trole);
                        if (ref($currsec{$trole}) eq 'ARRAY') {
                            if (!grep(/^\Q$sec\E/,@{$currsec{$trole}})) {
                                push(@{$currsec{$trole}},$sec);
                            }
                        } else {
                            $currsec{$trole} = [$sec];
                        }
                    } else {
                        push(@curr_roles,$role);
                    }
                }
                @current = @curr_roles;
            }
        }
    }
    my $numinrow = 3;
    my $count = 0;
    my $disabled;
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    foreach my $role (@roles) {
        my $checked = '';
        if (grep(/^\Q$role\E$/,@current)) {
            $checked = ' checked="checked" ';
        }
        my $plrole=&Apache::lonnet::plaintext($role,$crstype);
        if ($showsections) {
            $output .= &Apache::loncommon::start_data_table_row();
        } else {
            my $rem = $count%($numinrow);
            if ($rem == 0) {
                if ($count > 0) {
                    $output .= '</tr>';
                }
                $output .= '<tr>';
            }
        }
        $output .= '<td align="left"><span class="LC_nobreak"><label><input type="checkbox" name="'.
                   $item.'" value="'.$role.'"'.$checked.$disabled.'/>&nbsp;'.
                   $plrole.'</label></span></td>';
        if ($showsections) {
            $output .= '<td align="left">'.
                       &select_sections($item,$role,\@sections,$currsec{$role},$noedit).
                       '</td></tr>';
        }
        $count ++;
    }
    my %adv_roles =
        &Apache::lonnet::get_course_adv_roles($env{'request.course.id'},1);
    my $total = @roles;
    foreach my $role (sort(keys(%adv_roles))) {
        if ($role =~ m{^cr/($match_domain)/($match_name)/\w$}) {
            my $rolename = $3;
            my $value = 'cr_'.$1.'_'.$2.'_'.$rolename;
            my $checked = '';
            if (grep(/^\Q$value\E$/,@current)) {
                $checked = ' checked="checked" ';
            }
            if ($showsections) {
                $output .= &Apache::loncommon::start_data_table_row();
            } else {
                my $rem = $count%($numinrow);
                if ($rem == 0) {
                    if ($count > 0) {
                        $output .= '</tr>';
                    }
                    $output .= '<tr>';
                }
            }
            $output .= '<td><span class="LC_nobreak"><label><input type="checkbox" name="'.
                       $item.'" value="'.$value.'"'.$checked.$disabled.' />&nbsp;'.$rolename.
                       '</label></span></td>';
            if ($showsections) {
                $output .= '<td>'.
                           &select_sections($item,$role,\@sections,$currsec{$role},$noedit).
                           '</td>'.&Apache::loncommon::end_data_table_row();
            }
            $total ++;
            $count ++;
        }
    }
    if (!$showsections) {
        my $rem = $total%($numinrow);
        my $colsleft = $numinrow - $rem;
        if ($colsleft > 1 ) {
            $output .= '<td colspan="'.$colsleft.'" class="LC_left_item">'.
                       '&nbsp;</td>';
        } elsif ($colsleft == 1) {
            $output .= '<td class="LC_left_item">&nbsp;</td>';
        }
        $output .= '</tr>';
    }
    return $output;
}

sub set_discussion_fonts {
    my ($cdom,$cnum,$item,$settings,$noedit) = @_;
    my ($classorder,$classtitles) = &discussion_vote_classes();
    my ($styleorder,$styleitems) = &discussion_vote_styles();
    my $output;
    if (ref($classorder) eq 'ARRAY') {
        my $disabled;
        if ($noedit) {
            $disabled = ' disabled="disabled"';
        }
        foreach my $cat (@{$classorder}) {
            my %curr = ();
            ($curr{'size'},$curr{'weight'},$curr{'style'},$curr{'other'}) =
                split(/,/,$settings->{'discussion_post_fonts_'.$cat});
            $output .= &Apache::loncommon::start_data_table_row().
                       '<td>'.$classtitles->{$cat}.'</td>';
            if (ref($styleorder) eq 'ARRAY') {
                foreach my $item (@{$styleorder}) {
                    $output .= '<td><span class="LC_nobreak">';
                    my $selitem = $item;
                    if ($item eq 'size') {
                        my ($currsize,$currunit);
                        if ($curr{'size'} =~ /^(\d+)(px|%)$/) {
                            ($currsize,$currunit) = ($1,$2);
                            $curr{'size'} = $currunit;
                        }
                        $output .= '<input type="textbox" name="discussion_post_fonts_'.$cat.'_'.$item.'" value="'.$currsize.'" size="5"'.$disabled.' />'.
                                   '&nbsp;';
                        $selitem = 'unit';
                    }
                    if ((ref($styleitems) eq 'HASH') && (ref($styleitems->{$item}) eq 'ARRAY')) {
                        $output .= '<select name="discussion_post_fonts_'.$cat.'_'.$selitem.'"'.$disabled.'>';
                        foreach my $val (@{$styleitems->{$item}}) {
                            my $sel;
                            if ($val eq $curr{$item}) {
                                $sel = ' selected="selected"';
                            }
                            $output .= '<option value="'.$val.'"'.$sel.'>'.$val.'</option>';
                        }
                    }
                }
            }
            $output .= '</span></td><td><input type="textbox" size="10" name="discussion_post_fonts_'.$cat.'_other" value="'.$curr{'other'}.'"'.$disabled.' /></td>';
       }
       $output .= &Apache::loncommon::end_data_table_row();
    }
    return $output;
}

sub discussion_vote_classes {
    my $classorder = ['twoplus','oneplus','zero','oneminus','twominus'];
    my %classtitles = &Apache::lonlocal::texthash(
                        'twoplus'  => 'Two sigma above mean',
                        'oneplus'  => 'One sigma above mean',
                        'zero'     => 'Within one sigma of mean',
                        'oneminus' => 'One sigma below mean',
                        'twominus' => 'Two sigma below mean',
                      );
    return ($classorder,\%classtitles);
}

sub discussion_vote_styles {
    my $styleorder = ['size','weight','style'];
    my $styleitems = {
                         size => ['','px','%','xx-small','x-small','small','medium','large',
                                  'x-large','xx-large','smaller','larger'],
                         weight => ['','normal','bold','bolder','lighter','100','200','300','400',
                                    '500','600','700','800','900'],
                         style => ['','normal','italic','oblique'],
                     };
    return ($styleorder,$styleitems);
}

sub print_classlists {
    my ($position,$cdom,$settings,$itemtext,$rowtotal,$crstype,$noedit) = @_;
    my @ordered;
    if ($position eq 'top') {
        @ordered = ('default_enrollment_start_date',
                    'default_enrollment_end_date');
        if ($crstype eq 'Course') {
            push(@ordered,'defaultcredits');
        }
    } elsif ($position eq 'middle') {
        @ordered = ('nothideprivileged','checkforpriv');
    } else {
        @ordered = ('student_classlist_view',
                    'student_classlist_opt_in',
                     'student_classlist_portfiles');
    }
    my %lt;

    if ($crstype eq 'Community') {
        %lt = &Apache::lonlocal::texthash (
                 disabled => 'No viewable membership list',
                 section  => "Membership of viewer's section",
                 all      => 'List of all members',
              );
    } else {
        %lt = &Apache::lonlocal::texthash (
                 disabled => 'No viewable classlist',
                 section  => "Classlist of viewer's section",
                 all      => 'Classlist of all students',
              );
    }

    my %items = (
        'default_enrollment_start_date' => {
                   text => '<b>'.&mt($itemtext->{'default_enrollment_start_date'}).'</b>',
                   input => 'dates',
                 },
        'default_enrollment_end_date'  => {
                   text => '<b>'.&mt($itemtext->{'default_enrollment_end_date'}).'</b>',
                   input => 'dates',
                 },
        'defaultcredits' => {
                   text => '<b>'.&mt($itemtext->{'defaultcredits'}).'</b>',
                 },

        'nothideprivileged'   => {
                   text => '<b>'.&mt($itemtext->{'nothideprivileged'}).'</b>',
                   input => 'checkbox',
                 },

        'checkforpriv' => {
                   text => '<b>'.&mt($itemtext->{'checkforpriv'}).'</b>',
                   input => 'selectbox',
                 },

        'student_classlist_view'   => {
                   text => '<b>'.&mt($itemtext->{'student_classlist_view'}).'</b>',
                   input => 'selectbox',
                   options => \%lt,
                   order => ['disabled','all','section'],
                 },
        'student_classlist_opt_in' => {
                   text => '<b>'.&mt($itemtext->{'student_classlist_opt_in'}).'</b>',
                   input => 'radio',
                 },

        'student_classlist_portfiles' => {
                   text => '<b>'.&mt($itemtext->{'student_classlist_portfiles'}).'</b>',
                   input => 'radio',
                 },
    );
    unless (($settings->{'student_classlist_view'} eq 'all') || 
            ($settings->{'student_classlist_view'} eq 'section')) { 
        $settings->{'student_classlist_view'} = 'disabled';
    }
    return &make_item_rows($cdom,\%items,\@ordered,$settings,$rowtotal,$crstype,'classlists',$noedit);
}

sub print_appearance {
    my ($cdom,$settings,$ordered,$itemtext,$rowtotal,$crstype,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($ordered) eq 'ARRAY') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    my $mathdef;
    if ($crstype eq 'Community') {
        $mathdef = &mt("None specified - use member's choice");
    } else {
        $mathdef = &mt("None specified - use student's choice");
    }
    my %items = (
        'default_xml_style' => {
                   text => '<b>'.&mt($itemtext->{'default_xml_style'}).'</b> '.
                           '<a href="javascript:openbrowser'.
                           "('display','default_xml_style'".
                           ",'sty')".'">'.&mt('Select Style File').'</a>',
                   input => 'textbox',
                   size => 35,
                 },

        'pageseparators'  => {
                   text => '<b>'.&mt($itemtext->{'pageseparators'}).'</b>',
                   input => 'radio',
                 },
        'disable_receipt_display' => {
                   text => '<b>'.&mt($itemtext->{'disable_receipt_display'}).'</b>',
                   input => 'radio',
                 },
        'texengine'  => {
                   text => '<b>'.&mt($itemtext->{'texengine'}).'</b>',
                   input => 'selectbox',
                   options => {
                                MathJax  => 'MathJax',
                                mimetex => &mt('Convert to Images'),
                                tth      => &mt('TeX to HTML'),
                              },
                   order  => ['MathJax','mimetex','tth'],
                   nullval => $mathdef,
                 },
        'tthoptions' => {
                   text => '<b>'.&mt($itemtext->{'tthoptions'}).'</b>',
                   input => 'textbox',
                   size => 40,
                 },
         'uselcmath' => {
                   text => '<b>'.&mt($itemtext->{'uselcmath'}).'</b>',
                   input => 'radio',
                 },
         'usejsme'  => {
                   text => '<b>'.&mt($itemtext->{'usejsme'}).'</b>',
                   input => 'radio',
                 },
         'inline_chem' => {
                   text => '<b>'.&mt($itemtext->{'inline_chem'}).'</b>',
                   input => 'radio',
                 },
         'extresource' => {
                   text => '<b>'.&mt($itemtext->{'extresource'}).'</b>',
                   input => 'selectbox',
                   options => {
                                iframe => 'In iframe',
                                tab    => 'In new tab',
                                window => 'In pop-up window',
                              },
                   order  => ['iframe','tab','window'],
                 },
    );
    return &make_item_rows($cdom,\%items,$ordered,$settings,$rowtotal,$crstype,'appearance',$noedit);
}

sub print_grading {
    my ($cdom,$cnum,$settings,$ordered,$itemtext,$rowtotal,$crstype,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($ordered) eq 'ARRAY') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    my %items = (
        'grading'  => {
                   text => '<b>'.&mt($itemtext->{'grading'}).'</b>'.
                           &Apache::loncommon::help_open_topic('GradingOptions'),
                   input => 'selectbox',
                   options => {
                                standard => &mt('Standard: shows points'),
                                categories => &mt('Categories: shows points according to categories'),
                                external => &mt('External: shows number of completed parts and totals'),
                                externalnototals => &mt('External: shows only number of completed parts'),
                                spreadsheet => &mt('Spreadsheet: (with link to detailed scores)'), 
                              },
                   order => ['standard','categories','external','externalnototals','spreadsheet'],
                 },
        'rndseed' => {
                   text => '<b>'.&mt($itemtext->{'rndseed'}).'</b>'.
                           '<br /><span class="LC_warning LC_nobreak">'.
                           &mt('Modifying this will make problems have different numbers and answers!').
                           '</span>',
                   input => 'selectbox',
                   options => {
                                '32bit'  => '32bit',
                                '64bit'  => '64bit',
                                '64bit2' => '64bit2',
                                '64bit3' => '64bit3',
                                '64bit4' => '64bit4',
                                '64bit5' => '64bit5',
                              },
                   order => ['32bit','64bit','64bit2','64bit3','64bit4','64bit5'],
                   advanced => 1
                 },
        'receiptalg'  => {
                   text => '<b>'.&mt($itemtext->{'receiptalg'}).'</b><br />'.
                           &mt('This controls how receipt numbers are generated'),
                   input => 'selectbox',
                   options => {
                                receipt  => 'receipt',
                                receipt2 => 'receipt2',
                                receipt3 => 'receipt3',
                              },
                   order => ['receipt','receipt2','receipt3'],
                   advanced => 1
                 },
        'disablesigfigs' => {
                   text => '<b>'.&mt($itemtext->{'disablesigfigs'}).'</b>',
                   input => 'radio',
                 },
    );
    return &make_item_rows($cdom,\%items,$ordered,$settings,$rowtotal,$crstype,'grading',$noedit,$cnum);
}

sub print_printouts {
    my ($cdom,$settings,$ordered,$itemtext,$rowtotal,$crstype,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($ordered) eq 'ARRAY') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    my %items = (
        problem_stream_switch => {
            text => '<b>'.&mt($itemtext->{'problem_stream_switch'}).'</b>',
            input => 'radio',
                                 },
        suppress_tries => {
            text => '<b>'.&mt($itemtext->{'suppress_tries'}).'</b>',
            input => 'radio',
                          },
        default_paper_size => {
            text => '<b>'.&mt($itemtext->{'default_paper_size'}).'</b>',
            input => 'selectbox',
            options => {
                         Letter    => &mt('Letter').' [8 1/2x11 in]',
                         Legal     => &mt('Legal').' [8 1/2x14 in]',
                         Tabloid   => &mt('Tabloid').' [11x17 in]',
                         Executive => &mt('Executive').' [7 1/2x10 in]',
                         A2        => &mt('A2').' [420x594 mm]',
                         A3        => &mt('A3').' [297x420 mm]',
                         A4        => &mt('A4').' [210x297 mm]',
                         A5        => &mt('A5').' [148x210 mm]',
                         A6        => &mt('A6').' [105x148 mm]',
                       },
            order => ['Letter','Legal','Tabloid','Executive','A2','A3','A4','A5','A6'],
            nullval => &mt('None specified'),
                              },
        print_header_format => {
            text => '<b>'.&mt($itemtext->{'print_header_format'}).'</b>',
            input => 'checkbox',
                               },
        disableexampointprint => {
            text => '<b>'.&mt($itemtext->{'disableexampointprint'}).'</b>',
            input => 'radio',
                                 },
        canuse_pdfforms => {
            text  => '<b>'.&mt($itemtext->{'canuse_pdfforms'}).'</b>',
            input => 'selectbox',
            options => {
                         1    => &mt('Yes'),
                         0    => &mt('No'),
                       },
            order => ['1','0'],
            nullval => &mt('None specified - use domain default'),
                    }
    );
    return &make_item_rows($cdom,\%items,$ordered,$settings,$rowtotal,$crstype,'printouts',$noedit);
}

sub print_spreadsheet {
    my ($cdom,$settings,$ordered,$itemtext,$rowtotal,$crstype,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($ordered) eq 'ARRAY') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    my $SelectSpreadsheetFile=&mt('Select Spreadsheet File');
    my %items = (
        spreadsheet_default_classcalc => {
            text => '<b>'.&mt($itemtext->{'spreadsheet_default_classcalc'}).'</b> '.
                    '<span class="LC_nobreak"><a href="javascript:openbrowser'.
                    "('display','spreadsheet_default_classcalc'".
                    ",'spreadsheet')".'">'.$SelectSpreadsheetFile.'</a></span>',
            input => 'textbox',
                                         },
        spreadsheet_default_studentcalc => {
            text => '<b>'.&mt($itemtext->{'spreadsheet_default_studentcalc'}).'</b> '.
                    '<span class="LC_nobreak"><a href="javascript:openbrowser'.
                    "('display','spreadsheet_default_calc'".
                    ",'spreadsheet')".'">'.$SelectSpreadsheetFile.'</a></span>',
            input => 'textbox',
                                           },
        spreadsheet_default_assesscalc => {
            text => '<b>'.&mt($itemtext->{'spreadsheet_default_assesscalc'}).'</b> '.
                    '<span class="LC_nobreak"><a href="javascript:openbrowser'.
                    "('display','spreadsheet_default_assesscalc'".
                    ",'spreadsheet')".'">'.$SelectSpreadsheetFile.'</a></span>',
            input => 'textbox',
                                          },
        hideemptyrows => {
            text => '<b>'.&mt($itemtext->{'hideemptyrows'}).'</b>',
            input => 'radio',
                         },
                );
    return &make_item_rows($cdom,\%items,$ordered,$settings,$rowtotal,$crstype,'spreadsheet',$noedit);
}

sub print_bridgetasks {
    my ($cdom,$settings,$ordered,$itemtext,$rowtotal,$crstype,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($ordered) eq 'ARRAY') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    my ($stumsg,$msgnote);
    if ($crstype eq 'Community') {
        $stumsg = &mt('Send message to member');
        $msgnote = &mt('Message to member and add to user notes');
    } else {
        $stumsg = &mt('Send message to student');
        $msgnote = &mt('Message to student and add to user notes');
    }
    my %items = (
         task_messages => {
              text => '<b>'.&mt($itemtext->{'task_messages'}).'</b>',
              input => 'selectbox',
              options => {
                           only_student => $stumsg,
                           student_and_user_notes_screen => $msgnote,
                         },
              order   => ['only_student','student_and_user_notes_screen'],
              nullval => &mt('No message or record in user notes'),
                          },
         task_grading => {
              text => '<b>'.&mt($itemtext->{'task_grading'}).'</b>',
              input => 'selectbox',
              options => {
                           any => &mt('Grade BTs in any section'),
                           section => &mt('Grade BTs only in own section')
                         },
              order => ['any','section'],
                         },
         suppress_embed_prompt => {
             text => '<b>'.&mt($itemtext->{'suppress_embed_prompt'}).'</b><span class="LC_nobreak">'.
                     '&nbsp;'.&mt('(applies when current role is student)').'</span>',
             input => 'radio',
                                  },
                );
    return &make_item_rows($cdom,\%items,$ordered,$settings,$rowtotal,$crstype,'bridgetasks',$noedit);
}

sub print_ltitools {
    my ($cdom,$cnum,$settings,$rowtotal,$crstype,$noedit,$context) = @_;
    my ($datatable,$disabled,$css_class,$dest);
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    my $itemcount = 1;
    unless ($context eq 'domain') {
        my %tooltypes = &Apache::loncommon::usable_exttools();
        unless ($tooltypes{'crs'}) {
            my $showtype = 'course';
            if ($crstype eq 'Community') {
                $showtype = lc($crstype);
            }
            $css_class = $itemcount%2?' class="LC_odd_row"':'';
            $datatable = '<tr '.$css_class.'><td colspan="2">'.
                         &mt("Definition of external tools is not enabled for this $showtype.").'<br />';
            if ($tooltypes{'dom'}) {
                         $datatable .= &mt("Contact an administrator for the $showtype domain ([_1]) to request this feature be enabled.",
                                           '<i>'.$cdom.'</i>').
                         '<br /><br />'.
                         &mt("Use of external tools defined at a domain level is enabled, so the $showtype editor can be used to add tool(s), if any have been defined.");
            } else {
                $datatable .= &mt("Use of external tools defined at a domain level is not enabled, either, for this $showtype.").
                              '<br /><br />'.
                              &mt("Contact an administrator for the $showtype domain ([_1]) to request changes.",
                                  '<i>'.$cdom.'</i>');

            }
            $datatable .= '</tr>';
            $itemcount ++;
            return $datatable;
        }
    }
    my %lt = &ltitools_names();
    my $maxnum = 0;
    my %ordered;
    if (ref($settings) eq 'HASH') {
        foreach my $item (keys(%{$settings})) {
            if (ref($settings->{$item}) eq 'HASH') {
                my $num = $settings->{$item}{'order'};
                $ordered{$num} = $item;
            }
        }
    }

    if ($context eq 'domain') {
        $dest = '/adm/domainprefs';
    } else {
        $dest = '/adm/courseprefs';
    }
    my ($switchserver,$switchmessage);
    $switchserver = &check_switchserver($cdom,$cnum,$context,$dest);
    if ($switchserver) {
        if ($context eq 'domain') {
            $switchmessage = &mt("submit from domain's primary library server: [_1].",$switchserver);
        } elsif ($crstype eq 'Community') {
            $switchmessage = &mt("submit from community's home server: [_1].",$switchserver);
        } else {
            $switchmessage = &mt("submit from course's home server: [_1].",$switchserver);
        }
    }
    my $maxnum = scalar(keys(%ordered));
    my @courseroles = ('cc','in','ta','ep','st');
    my @ltiroles = qw(Instructor ContentDeveloper TeachingAssistant Learner);
    my @fields = ('fullname','firstname','lastname','email','roles','user');
    if (keys(%ordered)) {
        my @items = sort { $a <=> $b } keys(%ordered);
        for (my $i=0; $i<@items; $i++) {
            $css_class = $itemcount%2?' class="LC_odd_row"':'';
            my $item = $ordered{$items[$i]};
            my ($title,$key,$url,$usable,$lifetime,$imgsrc,%sigsel);
            if (ref($settings->{$item}) eq 'HASH') {
                $title = $settings->{$item}->{'title'};
                $url = $settings->{$item}->{'url'};
                $key = $settings->{$item}->{'key'};
                $usable = $settings->{$item}->{'usable'};
                $lifetime = $settings->{$item}->{'lifetime'};
                my $image = $settings->{$item}->{'image'};
                if ($image ne '') {
                    $imgsrc = '<img src="'.$image.'" alt="'.&mt('Tool Provider icon').'" />';
                }
                if ($settings->{$item}->{'sigmethod'} eq 'HMAC-256') {
                    $sigsel{'HMAC-256'} = ' selected="selected"';
                } else {
                    $sigsel{'HMAC-SHA1'} = ' selected="selected"';
                }
            }
            my $chgstr = ' onchange="javascript:reorderLTITools(this.form,'."'ltitools_".$item."'".');"';
            $datatable .= '<tr '.$css_class.'><td><span class="LC_nobreak">'
                         .'<select name="ltitools_'.$item.'"'.$chgstr.'>';
            for (my $k=0; $k<=$maxnum; $k++) {
                my $vpos = $k+1;
                my $selstr;
                if ($k == $i) {
                    $selstr = ' selected="selected" ';
                }
                $datatable .= '<option value="'.$k.'"'.$selstr.'>'.$vpos.'</option>';
            }
            $datatable .= '</select>'.('&nbsp;'x2).
                '<label><input type="checkbox" name="ltitools_del" value="'.$item.'" />'.
                &mt('Delete?').'</label></span></td>'.
                '<td colspan="2">'.
                '<fieldset><legend>'.&mt('Required settings').'</legend>'.
                '<span class="LC_nobreak">'.$lt{'title'}.':<input type="text" size="20" name="ltitools_title_'.$i.'" value="'.$title.'" /></span> '.
                ('&nbsp;'x2).
                '<span class="LC_nobreak">'.$lt{'version'}.':<select name="ltitools_version_'.$i.'">'.
                '<option value="LTI-1p0" selected="selected">1.1</option></select></span> '.
                ('&nbsp;'x2).
                '<span class="LC_nobreak">'.$lt{'msgtype'}.':<select name="ltitools_msgtype_'.$i.'">'.
                '<option value="basic-lti-launch-request" selected="selected">Launch</option></select></span> '.
                ('&nbsp;'x2).
                '<span class="LC_nobreak">'.$lt{'sigmethod'}.':<select name="ltitools_sigmethod_'.$i.'">'.
                '<option value="HMAC-SHA1"'.$sigsel{'HMAC-SHA1'}.'>HMAC-SHA1</option>'.
                '<option value="HMAC-SHA256"'.$sigsel{'HMAC-SHA256'}.'>HMAC-SHA256</option></select></span>'.
                '<br /><br />'.
                '<span class="LC_nobreak">'.$lt{'url'}.':<input type="text" size="60" name="ltitools_url_'.$i.'"'.
                ' value="'.$url.'" /></span>'.
                ('&nbsp;'x2).
                '<span class="LC_nobreak">'.$lt{'lifetime'}.':'.
                '<input type="text" size="5" name="ltitools_lifetime_'.$i.'" value="'.$lifetime.'" /></span><br /><br />';
            if ($key ne '') {
                $datatable .= '<span class="LC_nobreak">'.$lt{'key'};
                if ($noedit) {
                    $datatable .= ': ['.&mt('not shown').']';
                } elsif ($switchserver) {
                    $datatable .= ': ['.&mt('[_1] to view/edit',$switchserver).']';
                } else {
                    $datatable .= ':<input type="text" size="25" name="ltitools_key_'.$i.'" value="'.$key.'" autocomplete="off"'.$disabled.' />';
                }
                $datatable .= '</span> '.('&nbsp;'x2);
            } elsif (!$switchserver) {
                $datatable .= '<span class="LC_nobreak">'.$lt{'key'}.':'.
                              '<input type="text" size="25" name="ltitools_key_'.$i.'" value="'.$key.'" autocomplete="off"'.$disabled.' />'.
                              '</span> '.('&nbsp;'x2);
            }
            if ($switchserver) {
                if ($usable ne '') {
                    $datatable .= '<div id="ltitools_divcurrsecret_'.$i.'" style="display:inline-block" /><span class="LC_nobreak">'.
                                  $lt{'secret'}.': ['.&mt('not shown').'] '.('&nbsp;'x2).'</span></div>'.
                                  '<span class="LC_nobreak">'.&mt('Change secret?').
                                  '<label><input type="radio" value="0" name="ltitools_changesecret_'.$i.'" onclick="javascript:toggleChgSecret(this.form,'."'$i','secret','ltitools'".');" checked="checked"'.$disabled.' />'.&mt('No').'</label>'.
                                  ('&nbsp;'x2).
                                  '<label><input type="radio" value="1" name="ltitools_changesecret_'.$i.'" onclick="javascript:toggleChgSecret(this.form,'."'$i','secret','ltitools'".');" '.$disabled.' />'.&mt('Yes').'</label>'.('&nbsp;'x2).
                                  '</span><div id="ltitools_divchgsecret_'.$i.'" style="display:none" />'.
                                  '<span class="LC_nobreak"> - '.$switchmessage.'</span>'.
                                  '</div>';
                } elsif ($key eq '') {
                    $datatable .= '<span class="LC_nobreak">'.&mt('Key and Secret are required').' - '.$switchmessage.'</span>'."\n";
                } else {
                    $datatable .= '<span class="LC_nobreak">'.&mt('Secret required').' - '.$switchmessage.'</span>'."\n";
                }
                $datatable .= '<input type="hidden" name="ltitools_id_'.$i.'" value="'.$item.'" />';
            } else {
                if ($usable ne '') {
                    $datatable .= '<div id="ltitools_divcurrsecret_'.$i.'" style="display:inline-block" /><span class="LC_nobreak">'.
                                  $lt{'secret'}.': ['.&mt('not shown').'] '.('&nbsp;'x2).'</span></div>'.
                                  '<span class="LC_nobreak">'.&mt('Change?').
                                  '<label><input type="radio" value="0" name="ltitools_changesecret_'.$i.'" onclick="javascript:toggleChgSecret(this.form,'."'$i','secret','ltitools'".');" checked="checked"'.$disabled.' />'.&mt('No').'</label>'.
                                  ('&nbsp;'x2).
                                  '<label><input type="radio" value="1" name="ltitools_changesecret_'.$i.'" onclick="javascript:toggleChgSecret(this.form,'."'$i','secret','ltitools'".');"'.$disabled.' />'.&mt('Yes').
                                  '</label>&nbsp;&nbsp;</span><div id="ltitools_divchgsecret_'.$i.'" style="display:none" />'.
                                  '<span class="LC_nobreak">'.&mt('New Secret').':'.
                                  '<input type="password" size="20" name="ltitools_secret_'.$i.'" value="" autocomplete="new-password"'.$disabled.' />'.
                                  '<label><input type="checkbox" name="ltitools_visible_'.$i.'" id="ltitools_visible_'.$i.'" onclick="if (this.checked) { this.form.ltitools_secret_'.$i.'.type='."'text'".' } else { this.form.ltitools_secret_'.$i.'.type='."'password'".' }"'.$disabled.' />'.&mt('Visible input').'</label>'.
                                  '<input type="hidden" name="ltitools_id_'.$i.'" value="'.$item.'" /></span></div>';
                } else {
                    $datatable .=
                        '<span class="LC_nobreak">'.$lt{'secret'}.':'.
                        '<input type="password" size="20" name="ltitools_secret_'.$i.'" value="" autocomplete="new-password"'.$disabled.' />'.
                        '<label><input type="checkbox" name="ltitools_visible_'.$i.'" id="ltitools_visible_'.$i.'" onclick="if (this.checked) { this.form.ltitools_secret_'.$i.'.type='."'text'".' } else { this.form.ltitools_secret_'.$i.'.type='."'password'".' }"'.$disabled.' />'.&mt('Visible input').'</label>'.
                        '<input type="hidden" name="ltitools_id_'.$i.'" value="'.$item.'" /></span>';
                }
            }
            $datatable .= '</fieldset>'.
                          '<fieldset><legend>'.&mt('Optional settings').'</legend>'.
                          '<span class="LC_nobreak">'.&mt('Display target:');
            my %currdisp;
            if (ref($settings->{$item}->{'display'}) eq 'HASH') {
                if ($settings->{$item}->{'display'}->{'target'} eq 'window') {
                    $currdisp{'window'} = ' checked="checked"';
                } elsif ($settings->{$item}->{'display'}->{'target'} eq 'tab') {
                    $currdisp{'tab'} = ' checked="checked"';
                } else {
                    $currdisp{'iframe'} = ' checked="checked"';
                }
                if ($settings->{$item}->{'display'}->{'width'} =~ /^(\d+)$/) {
                    $currdisp{'width'} = $1;
                }
                if ($settings->{$item}->{'display'}->{'height'} =~ /^(\d+)$/) {
                    $currdisp{'height'} = $1;
                }
                $currdisp{'linktext'} = $settings->{$item}->{'display'}->{'linktext'};
                $currdisp{'explanation'} = $settings->{$item}->{'display'}->{'explanation'};
            } else {
                $currdisp{'iframe'} = ' checked="checked"';
            }
            foreach my $disp ('iframe','tab','window') {
                $datatable .= '<label><input type="radio" name="ltitools_target_'.$i.'" value="'.$disp.'"'.$currdisp{$disp}.' />'.
                              $lt{$disp}.'</label>'.('&nbsp;'x2);
            }
            $datatable .= ('&nbsp;'x4);
            foreach my $dimen ('width','height') {
                $datatable .= '<label>'.$lt{$dimen}.'&nbsp;'.
                              '<input type="text" name="ltitools_'.$dimen.'_'.$i.'" size="5" value="'.$currdisp{$dimen}.'" /></label>'.
                              ('&nbsp;'x2);
            }
            $datatable .= '</span><br />'.
                          '<div class="LC_left_float">'.$lt{'linktext'}.'<br />'.
                          '<input type="text" name="ltitools_linktext_'.$i.'" size="25" value="'.$currdisp{'linktext'}.'" /></div>'.
                          '<div class="LC_left_float">'.$lt{'explanation'}.'<br />'.
                          '<textarea name="ltitools_explanation_'.$i.'" rows="5" cols="40">'.$currdisp{'explanation'}.
                          '</textarea></div><div style=""></div><br />';
            my %units = (
                          'passback' => 'days',
                          'roster'   => 'seconds',
                        );
            foreach my $extra ('passback','roster') {
                my $validsty = 'none';
                my $currvalid;
                my $checkedon = '';
                my $checkedoff = ' checked="checked"';
                if ($settings->{$item}->{$extra}) {
                    $checkedon = $checkedoff;
                    $checkedoff = '';
                    $validsty = 'inline-block';
                    if ($settings->{$item}->{$extra.'valid'} =~ /^\d+\.?\d*$/) {
                        $currvalid = $settings->{$item}->{$extra.'valid'};
                    }
                }
                my $onclick = ' onclick="toggleLTITools(this.form,'."'$extra','$i'".');"';
                $datatable .= '<div class="LC_floatleft"><span class="LC_nobreak">'.$lt{$extra}.'&nbsp;'.
                              '<label><input type="radio" name="ltitools_'.$extra.'_'.$i.'" value="0"'.$checkedoff.$onclick.' />'.
                              &mt('No').'</label>'.('&nbsp;'x2).
                              '<label><input type="radio" name="ltitools_'.$extra.'_'.$i.'" value="1"'.$checkedon.$onclick.' />'.
                              &mt('Yes').'</label></span></div>'.
                              '<div class="LC_floatleft" style="display:'.$validsty.';" id="ltitools_'.$extra.'time_'.$i.'">'.
                              '<span class="LC_nobreak">'.
                              &mt("until at least [_1] $units{$extra} after launch",
                                  '<input type="text" name="ltitools_'.$extra.'valid_'.$i.'" value="'.$currvalid.'" />').
                              '</span></div><div style="padding:0;clear:both;margin:0;border:0"></div>';
            }
            $datatable .= '<span class="LC_nobreak">'.$lt{'icon'}.':&nbsp;';
            if ($imgsrc) {
                $datatable .= $imgsrc.
                              '<label><input type="checkbox" name="ltitools_image_del"'.
                              ' value="'.$item.'" />'.&mt('Delete?').'</label></span> '.
                              '<span class="LC_nobreak">&nbsp;'.&mt('Replace:').'&nbsp;';
            } else {
                $datatable .= '('.&mt('if larger than 21x21 pixels, image will be scaled').')&nbsp;';
            }
            if ($switchserver) {
                $datatable .= &mt('Upload to library server: [_1]',$switchserver);
            } else {
                $datatable .= '<input type="file" name="ltitools_image_'.$i.'" value="" />';
            }
            $datatable .= '</span></fieldset>';
            my (%checkedfields,%rolemaps,$userincdom);
            if (ref($settings->{$item}) eq 'HASH') {
                if (ref($settings->{$item}->{'fields'}) eq 'HASH') {
                    %checkedfields = %{$settings->{$item}->{'fields'}};
                }
                $userincdom = $settings->{$item}->{'incdom'};
                if (ref($settings->{$item}->{'roles'}) eq 'HASH') {
                    %rolemaps = %{$settings->{$item}->{'roles'}};
                    $checkedfields{'roles'} = 1;
                }
            }
            $datatable .= '<fieldset><legend>'.&mt('User data sent on launch').'</legend>'.
                          '<span class="LC_nobreak">';
            my $userfieldstyle = 'display:none;';
            my $seluserdom = '';
            my $unseluserdom = ' selected="selected"';
            foreach my $field (@fields) {
                my ($checked,$onclick,$id,$spacer);
                if ($checkedfields{$field}) {
                    $checked = ' checked="checked"';
                }
                if ($field eq 'user') {
                    $id = ' id="ltitools_user_field_'.$i.'"';
                    $onclick = ' onclick="toggleLTITools(this.form,'."'$field','$i'".')"';
                    if ($checked) {
                        $userfieldstyle = 'display:inline-block';
                        if ($userincdom) {
                            $seluserdom = $unseluserdom;
                            $unseluserdom = '';
                        }
                    }
                } else {
                    $spacer = ('&nbsp;' x2);
                }
                $datatable .= '<label>'.
                              '<input type="checkbox" name="ltitools_fields_'.$i.'" value="'.$field.'"'.$id.$checked.$onclick.' />'.
                              $lt{$field}.'</label>'.$spacer;
            }
            $datatable .= '</span>';
            $datatable .= '<div style="'.$userfieldstyle.'" id="ltitools_user_div_'.$i.'">'.
                          '<span class="LC_nobreak"> : '.
                          '<select name="ltitools_userincdom_'.$i.'">'.
                          '<option value="">'.&mt('Select').'</option>'.
                          '<option value="0"'.$unseluserdom.'>'.&mt('username').'</option>'.
                          '<option value="1"'.$seluserdom.'>'.&mt('username:domain').'</option>'.
                          '</select></span></div>';
            $datatable .= '</fieldset>'.
                          '<fieldset><legend>'.&mt('Role mapping').'</legend><table><tr>';
            foreach my $role (@courseroles) {
                my ($selected,$selectnone);
                if (!$rolemaps{$role}) {
                    $selectnone = ' selected="selected"';
                }
                $datatable .= '<td style="text-align: center">'.
                              &Apache::lonnet::plaintext($role,'Course').'<br />'.
                              '<select name="ltitools_roles_'.$role.'_'.$i.'">'.
                              '<option value=""'.$selectnone.'>'.&mt('Select').'</option>';
                foreach my $ltirole (@ltiroles) {
                    unless ($selectnone) {
                        if ($rolemaps{$role} eq $ltirole) {
                            $selected = ' selected="selected"';
                        } else {
                            $selected = '';
                        }
                    }
                    $datatable .= '<option value="'.$ltirole.'"'.$selected.'>'.$ltirole.'</option>';
                }
                $datatable .= '</select></td>';
            }
            $datatable .= '</tr></table></fieldset>';
            my %courseconfig;
            if (ref($settings->{$item}) eq 'HASH') {
                if (ref($settings->{$item}->{'crsconf'}) eq 'HASH') {
                    %courseconfig = %{$settings->{$item}->{'crsconf'}};
                }
            }
            $datatable .= '<fieldset><legend>';
            if ($context eq 'domain') {
                $datatable .= &mt('Configurable in course');
            } else {
                $datatable .= &mt('Configurable for each instance of tool in course');
            }
            $datatable .= '</legend><span class="LC_nobreak">';
            foreach my $item ('label','title','target','linktext','explanation','append') {
                my $checked;
                if ($courseconfig{$item}) {
                    $checked = ' checked="checked"';
                }
                $datatable .= '<label>'.
                       '<input type="checkbox" name="ltitools_courseconfig_'.$i.'" value="'.$item.'"'.$checked.' />'.
                       $lt{'crs'.$item}.'</label>&nbsp; '."\n";
            }
            $datatable .= '</span></fieldset>'.
                          '<fieldset><legend>'.&mt('Custom items sent on launch').'</legend>'.
                          '<table><tr><th>'.&mt('Action').'</th><th>'.&mt('Name').'</th><th>'.&mt('Value').'</th></tr>';
            if (ref($settings->{$item}->{'custom'}) eq 'HASH') {
                my %custom = %{$settings->{$item}->{'custom'}};
                if (keys(%custom) > 0) {
                    foreach my $key (sort(keys(%custom))) {
                        $datatable .= '<tr><td><span class="LC_nobreak">'.
                                      '<label><input type="checkbox" name="ltitools_customdel_'.$i.'" value="'.
                                      $key.'" />'.&mt('Delete').'</label></span></td><td>'.$key.'</td>'.
                                      '<td><input type="text" name="ltitools_customval_'.$key.'_'.$i.'"'.
                                      ' value="'.$custom{$key}.'" /></td></tr>';
                    }
                }
            }
            $datatable .= '<tr><td><span class="LC_nobreak">'.
                          '<label><input type="checkbox" name="ltitools_customadd" value="'.$i.'" />'.
                          &mt('Add').'</label></span></td><td><input type="text" name="ltitools_custom_name_'.$i.'" />'.
                          '</td><td><input type="text" name="ltitools_custom_value_'.$i.'" /></td></tr>';
            $datatable .= '</table></fieldset></td></tr>'."\n";
            $itemcount ++;
        }
    }
    $css_class = $itemcount%2?' class="LC_odd_row"':'';
    my $chgstr = ' onchange="javascript:reorderLTITools(this.form,'."'ltitools_add_pos'".');"';
    $datatable .= '<tr '.$css_class.'><td><span class="LC_nobreak">'."\n".
                  '<input type="hidden" name="ltitools_maxnum" value="'.$maxnum.'" />'."\n".
                  '<select name="ltitools_add_pos"'.$chgstr.'>';
    for (my $k=0; $k<$maxnum+1; $k++) {
        my $vpos = $k+1;
        my $selstr;
        if ($k == $maxnum) {
            $selstr = ' selected="selected" ';
        }
        $datatable .= '<option value="'.$k.'"'.$selstr.'>'.$vpos.'</option>';
    }
    $datatable .= '</select>&nbsp;'."\n".
                  '<input type="checkbox" name="ltitools_add" value="1" />'.&mt('Add').'</span></td>'."\n".
                  '<td colspan="2">'.
                  '<fieldset><legend>'.&mt('Required settings').'</legend>'.
                  '<span class="LC_nobreak">'.$lt{'title'}.':<input type="text" size="20" name="ltitools_add_title" value="" /></span> '."\n".
                  ('&nbsp;'x2).
                  '<span class="LC_nobreak">'.$lt{'version'}.':<select name="ltitools_add_version">'.
                  '<option value="LTI-1p0" selected="selected">1.1</option></select></span> '."\n".
                  ('&nbsp;'x2).
                  '<span class="LC_nobreak">'.$lt{'msgtype'}.':<select name="ltitools_add_msgtype">'.
                  '<option value="basic-lti-launch-request" selected="selected">Launch</option></select></span> '.
                  '<span class="LC_nobreak">'.$lt{'sigmethod'}.':<select name="ltitools_add_sigmethod">'.
                  '<option value="HMAC-SHA1" selected="selected">HMAC-SHA1</option>'.
                  '<option value="HMAC-SHA256">HMAC-SHA256</option></select></span>'.
                  '<br />'.
                  '<span class="LC_nobreak">'.$lt{'url'}.':<input type="text" size="60" name="ltitools_add_url" value="" /></span> '."\n".
                  ('&nbsp;'x2).
                  '<span class="LC_nobreak">'.$lt{'lifetime'}.':<input type="text" size="5" name="ltitools_add_lifetime" value="300" /></span><br />';
    if ($switchserver) {
        $datatable .= '<span class="LC_nobreak">'.&mt('Key and Secret are required').' - '.$switchmessage.'</span>'."\n";
    } else {
        $datatable .= '<span class="LC_nobreak">'.$lt{'key'}.':<input type="text" size="25" name="ltitools_add_key" value="" autocomplete="off"'.$disabled.' /></span> '."\n".
                      ('&nbsp;'x2).
                      '<span class="LC_nobreak">'.$lt{'secret'}.':<input type="password" size="20" name="ltitools_secret_add" value="" autocomplete="new-password"'.$disabled.' />'.
                      '<label><input type="checkbox" name="ltitools_add_visible" id="ltitools_add_visible" onclick="if (this.checked) { this.form.ltitools_secret_add.type='."'text'".' } else { this.form.ltitools_secret_add.type='."'password'".' }"'.$disabled.' />'.&mt('Visible input').'</label></span> '."\n";
    }
    $datatable .= '<br /><br />'.
                  '</fieldset>'.
                  '<fieldset><legend>'.&mt('Optional settings').'</legend>'.
                  '<span class="LC_nobreak">'.&mt('Display target:');
    my %defaultdisp;
    $defaultdisp{'iframe'} = ' checked="checked"';
    foreach my $disp ('iframe','tab','window') {
        $datatable .= '<label><input type="radio" name="ltitools_add_target" value="'.$disp.'"'.$defaultdisp{$disp}.' />'.
                      $lt{$disp}.'</label>'.('&nbsp;'x2);
    }
    $datatable .= ('&nbsp;'x4);
    foreach my $dimen ('width','height') {
        $datatable .= '<label>'.$lt{$dimen}.'&nbsp;'.
                      '<input type="text" name="ltitools_add_'.$dimen.'" size="5" /></label>'.
                      ('&nbsp;'x2);
    }
    $datatable .= '</span><br />'.
                  '<div class="LC_left_float">'.$lt{'linktext'}.'<br />'.
                  '<input type="text" name="ltitools_add_linktext" size="5" /></div>'.
                  '<div class="LC_left_float">'.$lt{'explanation'}.'<br />'.
                  '<textarea name="ltitools_add_explanation" rows="5" cols="40"></textarea>'.
                  '</div><div style=""></div><br />';
    my %units = (
                  'passback' => 'days',
                  'roster'   => 'seconds',
                );
    my %defaulttimes = (
                     'passback' => '7',
                     'roster'   => '300',
                   );
    foreach my $extra ('passback','roster') {
        my $onclick = ' onclick="toggleLTITools(this.form,'."'$extra','add'".');"';
        $datatable .= '<div class="LC_floatleft"><span class="LC_nobreak">'.$lt{$extra}.'&nbsp;'.
                      '<label><input type="radio" name="ltitools_'.$extra.'_add" value="0" checked="checked"'.$onclick.' />'.
                      &mt('No').'</label></span>'.('&nbsp;'x2).'<span class="LC_nobreak">'.
                      '<label><input type="radio" name="ltitools_'.$extra.'_add" value="1"'.$onclick.' />'.
                      &mt('Yes').'</label></span></div>'.
                      '<div class="LC_floatleft" style="display:none;" id="ltitools_'.$extra.'time_add">'.
                      '<span class="LC_nobreak">'.
                      &mt("until at least [_1] $units{$extra} after launch",
                          '<input type="text" name="ltitools_'.$extra.'valid_add" value="'.$defaulttimes{$extra}.'" />').
                      '</span></div><div style="padding:0;clear:both;margin:0;border:0"></div>';
    }
    $datatable .= '<span class="LC_nobreak">'.$lt{'icon'}.':&nbsp;'.
                  '('.&mt('if larger than 21x21 pixels, image will be scaled').')&nbsp;';
    if ($switchserver) {
        $datatable .= &mt('Upload to library server: [_1]',$switchserver);
    } else {
        $datatable .= '<input type="file" name="ltitools_add_image" value="" />';
    }
    $datatable .= '</span></fieldset>'.
                  '<fieldset><legend>'.&mt('User data sent on launch').'</legend>'.
                  '<span class="LC_nobreak">';
    foreach my $field (@fields) {
        my ($id,$onclick,$spacer);
        if ($field eq 'user') {
            $id = ' id="ltitools_user_field_add"';
            $onclick = ' onclick="toggleLTITools(this.form,'."'$field','add'".')"';
        } else {
            $spacer = ('&nbsp;' x2);
        }
        $datatable .= '<label>'.
                      '<input type="checkbox" name="ltitools_add_fields" value="'.$field.'"'.$id.$onclick.' />'.
                      $lt{$field}.'</label>'.$spacer;
    }
    $datatable .= '</span>'.
                  '<div style="display:none;" id="ltitools_user_div_add">'.
                  '<span class="LC_nobreak"> : '.
                  '<select name="ltitools_add_userincdom">'.
                  '<option value="" selected="selected">'.&mt('Select').'</option>'.
                  '<option value="0">'.&mt('username').'</option>'.
                  '<option value="1">'.&mt('username:domain').'</option>'.
                  '</select></span></div></fieldset>';
    $datatable .= '<fieldset><legend>'.&mt('Role mapping').'</legend><table><tr>';
    foreach my $role (@courseroles) {
        my ($checked,$checkednone);
        $datatable .= '<td style="text-align: center">'.
                      &Apache::lonnet::plaintext($role,'Course').'<br />'.
                      '<select name="ltitools_add_roles_'.$role.'">'.
                      '<option value="" selected="selected">'.&mt('Select').'</option>';
        foreach my $ltirole (@ltiroles) {
            $datatable .= '<option value="'.$ltirole.'">'.$ltirole.'</option>';
        }
        $datatable .= '</select></td>';
    }
    $datatable .= '</tr></table></fieldset>'.
                  '<fieldset><legend>';
    if ($context eq 'domain') {
        $datatable .= &mt('Configurable in course');
    } else {
        $datatable .= &mt('Configurable for each instance of tool in course');
    }
    $datatable .= '</legend><span class="LC_nobreak">';
    foreach my $item ('label','title','target','linktext','explanation','append') {
        $datatable .= '<label>'.
                      '<input type="checkbox" name="ltitools_add_courseconfig" value="'.$item.'" checked="checked" />'.
                      $lt{'crs'.$item}.'</label>'.('&nbsp;' x2)."\n";
    }
    $datatable .= '</span></fieldset>'.
                  '<fieldset><legend>'.&mt('Custom items sent on launch').'</legend>'.
                  '<table><tr><th>'.&mt('Action').'</th><th>'.&mt('Name').'</th><th>'.&mt('Value').'</th></tr>'.
                  '<tr><td><span class="LC_nobreak">'.
                  '<label><input type="checkbox" name="ltitools_add_custom" value="1" />'.
                  &mt('Add').'</label></span></td><td><input type="text" name="ltitools_add_custom_name" />'.
                  '</td><td><input type="text" name="ltitools_add_custom_value" /></td></tr>'.
                  '</table></fieldset>'."\n".
                  '</td>'."\n".
                  '</tr>'."\n";
    $itemcount ++;
    return $datatable;
}

sub ltitools_names {
    my %lt = &Apache::lonlocal::texthash(
                                          'title'          => 'Title',
                                          'version'        => 'Version',
                                          'msgtype'        => 'Message Type',
                                          'sigmethod'      => 'Signature Method',
                                          'url'            => 'URL',
                                          'key'            => 'Key',
                                          'lifetime'       => 'Nonce lifetime (s)',
                                          'secret'         => 'Secret',
                                          'icon'           => 'Icon',
                                          'user'           => 'User',
                                          'fullname'       => 'Full Name',
                                          'firstname'      => 'First Name',
                                          'lastname'       => 'Last Name',
                                          'email'          => 'E-mail',
                                          'roles'          => 'Role',
                                          'window'         => 'Window',
                                          'tab'            => 'Tab',
                                          'iframe'         => 'iFrame',
                                          'height'         => 'Height',
                                          'width'          => 'Width',
                                          'linktext'       => 'Default Link Text',
                                          'explanation'    => 'Default Explanation',
                                          'passback'       => 'Tool can return grades:',
                                          'roster'         => 'Tool can retrieve roster:',
                                          'crstarget'      => 'Display target',
                                          'crslabel'       => 'Course label',
                                          'crstitle'       => 'Course title',
                                          'crslinktext'    => 'Link Text',
                                          'crsexplanation' => 'Explanation',
                                          'crsappend'      => 'Provider URL',
                                        );
    return %lt;
}

sub print_lti {
    my ($cdom,$settings,$ordered,$itemtext,$rowtotal,$crstype,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($ordered) eq 'ARRAY') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    my @menuitems = ('fullname','coursetitle','role','logout','grades');
    my %menutitles = &ltimenu_titles();
    my ($domdefs,$displaydefs);
    if ($env{'request.lti.login'}) {
        my %lti = &Apache::lonnet::get_domain_lti($cdom,'provider');
        my @domdefsmenu;
        if (ref($lti{$env{'request.lti.login'}}) eq 'HASH') {
            if ($lti{$env{'request.lti.login'}}{'topmenu'}) {
                $domdefs = &mt('Header shown').', ';
            }
            if ($lti{$env{'request.lti.login'}}{'inlinemenu'}) {
                $domdefs .= &mt('Inline menu shown');
            }
            $domdefs =~ s/,\s$//;
            if (!$domdefs) {
                $domdefs = &mt('No header or inline menu shown');
            }
            $domdefs = ' ('.&mt('Domain default').': '.$domdefs.')';
            if (ref($lti{$env{'request.lti.login'}}{'lcmenu'}) eq 'ARRAY') {
                @domdefsmenu = @{$lti{$env{'request.lti.login'}}{'lcmenu'}};
            }
        }
        $displaydefs = &mt('Domain defaults');
        if (@domdefsmenu) {
            my @diffs = &Apache::loncommon::compare_arrays(\@menuitems,\@domdefsmenu);
            if (@diffs) {
                my $missing;
                foreach my $item (@menuitems) {
                    unless (grep(/^\Q$item\E$/,@domdefsmenu)) {
                        $missing .= ' '.$menutitles{$item}.',';
                    }
                }
                $missing =~ s/,$//;
                $displaydefs .= ': '.&mt('Not shown').' --'.$missing;
            } else {
                $displaydefs .= ': '.&mt('All shown');
            }
        } else {
            $displaydefs .= ': '.&mt('Not shown').' -- '.join(', ', map { $menutitles{$_}; } @menuitems);
        }
    } else {
        $displaydefs = &mt('Domain defaults only available in LTI context');
    }
    my %items = (
        'lti.override' => {
            text => '<b>'.&mt($itemtext->{'lti.override'}).'</b>'.$domdefs,
            input => 'radio',
                   },
        'lti.topmenu' => {
            text => '<b>'.&mt($itemtext->{'lti.topmenu'}).'</b>',
            input => 'radio',
                   },
        'lti.inlinemenu' => {
            text => '<b>'.&mt($itemtext->{'lti.inlinemenu'}).'</b>',
            input => 'radio',
                      },
        'lti.lcmenu' => {
            text => '<b>'.&mt($itemtext->{'lti.lcmenu'}).'</b><br />'.$displaydefs,
            input => 'custom',
                  },
                );
    return &make_item_rows($cdom,\%items,$ordered,$settings,$rowtotal,$crstype,'lti',$noedit);
}

sub lcmenu_checkboxes {
    my ($cdom,$caller,$settings,$crstype,$noedit) = @_;
    my @menuitems = ('fullname','coursetitle','role','logout','grades');
    my %menutitles = &ltimenu_titles();
    my (@current,@domdefs);
    if ($env{'request.lti.login'}) {
        my %lti = &Apache::lonnet::get_domain_lti($cdom,'provider');
        if (ref($lti{$env{'request.lti.login'}}) eq 'HASH') {
            if (ref($lti{$env{'request.lti.login'}}{'lcmenu'}) eq 'ARRAY') {
                @domdefs = @{$lti{$env{'request.lti.login'}}{'lcmenu'}};
            }
        }
    }
    if (ref($settings) eq 'HASH') {
        if ($settings->{'lti.lcmenu'}) {
            unless ($settings->{'lti.lcmenu'} eq 'none') {
                @current = split(',',$settings->{'lti.lcmenu'});
            }
        } else {
            @current = @domdefs;
        }
    } else {
        @current = @domdefs;
    }
    my $numinrow = 3;
    my $count = 0;
    my $disabled;
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    my $output = '<table>';
    foreach my $item (@menuitems) {
        my $checked = '';
        if (grep(/^\Q$item\E$/,@current)) {
            $checked = ' checked="checked" ';
        }
        my $rem = $count%($numinrow);
        if ($rem == 0) {
            if ($count > 0) {
                $output .= '</tr>';
            }
            $output .= '<tr>';
        }
        $output .= '<td align="left"><span class="LC_nobreak"><label><input type="checkbox" '.
                   'name="lti.lcmenu" value="'.$item.'"'.$checked.$disabled.'/>&nbsp;'.
                   $menutitles{$item}.'</label></span></td>';
        $count ++;
    }
    my $rem = $count%($numinrow);
    my $colsleft = $numinrow - $rem;
    if ($colsleft > 1 ) {
        $output .= '<td colspan="'.$colsleft.'" class="LC_left_item">'.
                   '&nbsp;</td>';
    } elsif ($colsleft == 1) {
        $output .= '<td class="LC_left_item">&nbsp;</td>';
    }
    $output .= '</tr></table>';
}

sub ltimenu_titles {
    return &Apache::lonlocal::texthash(
                                        fullname    => 'Full name',
                                        coursetitle => 'Course title',
                                        role        => 'Role',
                                        logout      => 'Logout',
                                        grades      => 'Grades',
    );
}

sub print_menuitems {
    my ($position,$cdom,$settings,$itemtext,$rowtotal,$crstype,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($itemtext) eq 'HASH')) {
        return;
    }
    if ($position eq 'top') {
        my (%defaultmenu_options,@defaultmenu_order,$addcollection);
        if ($settings->{'menucollections'} ne '') {
            foreach my $item (split(/;/,$settings->{'menucollections'})) {
                my ($num,$value) = split(/\%/,$item);
                if ($num =~ /^\d+$/) {
                    $defaultmenu_options{$num} = $num;
                }
            }
            @defaultmenu_order = sort { $a <=> $b } keys(%defaultmenu_options);
            $addcollection = $defaultmenu_order[-1] + 1;
        } else {
            $addcollection = 1;
        }
        $defaultmenu_options{$addcollection} = $addcollection;
        my %items = (
            'menudefault' => {
                   text => '<b>'.&mt($itemtext->{'menudefault'}).'</b><br />'.
                           &mt("(can be overriden in deep-link context)"),
                   input => 'selectbox',
                   options => \%defaultmenu_options,
                   order  => \@defaultmenu_order,
                   nullval => &mt('Standard (all menus shown)'),
                            },
        );
        return &make_item_rows($cdom,\%items,['menudefault'],$settings,$rowtotal,$crstype,'menuitems',$noedit);
    } else {
        my %menu;
        my $count = 0;
        my $next = 1;
        my ($datatable,$disabled);
        if ($noedit) {
            $disabled = ' disabled="disabled"';
        }

        my ($ordered,$cats) = &menuitems_categories();
        my @order = @{$ordered};
        my %categories = %{$cats};
        my %menutitles = &menuitems_titles();
        my %menufields = &menuitems_fields();

        if ($settings->{'menucollections'} ne '') {
            foreach my $item (split(/;/,$settings->{'menucollections'})) {
                my ($num,$value) = split(/\%/,$item);
                if ($num =~ /^\d+$/) {
                    my @entries = split(/\&/,$value);
                    foreach my $entry (@entries) {
                        my ($name,$fields) = split(/=/,$entry);
                        $menu{$num}{$name} = $fields;
                    }
                }
            }
            if (keys(%menu)) {
                my @current = sort { $a <=> $b } keys(%menu);
                $next += $current[-1];
                foreach my $num (@current) {
                    my %checked;
                    my $on = ' checked="checked"';
                    foreach my $key (keys(%{$menu{$num}})) {
                        if (($key eq 'top') || ($key eq 'inline') || ($key eq 'foot') || ($key eq 'main')) {
                            if ($menu{$num}{$key} eq 'y') {
                                $checked{$key} = $on;
                            }
                        } else {
                            foreach my $field (split(/,/,$menu{$num}{$key})) {
                                if (exists($menufields{$field})) {
                                    $checked{$field} = $on;
                                }
                            }
                        }
                    }
                    if (ref($menu{$num}) eq 'HASH') {
                        $datatable .= &item_table_row_start('<em class="LC_nav_bar">'.$num.'</em>',$count,'','','','LC_left_item');
                        foreach my $category (@order) {
                            if ((ref($categories{$category}) eq 'ARRAY') && (@{$categories{$category}} > 0)) {
                                $datatable .= '<fieldset style="vertical-align:top; display:inline-block"><legend>'.$menutitles{$category}.'</legend>'."\n";
                                if ($category eq 'text') {
                                    $datatable .= '<i>'.&mt('Header').'</i><br />';
                                }
                                foreach my $field (@{$categories{$category}}) {
                                    if ($field eq 'disc') {
                                        $datatable .= '<br /><i>'.&mt('Footer').'</i><br />';
                                    }
                                    $datatable .= '<label><input type="checkbox" name="menucollections_'.$num.'" value="'.$field.'"'.$checked{$field}.$disabled.' />'.
                                                  $menufields{$field}.'</label><br />';
                                }
                                $datatable .= '</fieldset>';
                            }
                        }
                        $datatable .= &item_table_row_end();
                        $count ++;
                    }
                }
            }
        } elsif ($noedit) {
            my $text = &mt('No menu collections defined for this course.');
            $datatable .= &item_table_row_start($text,$count);
        }
        unless ($noedit) {
            my $add = '<label><input type="checkbox" name="menucollections_add" id="menucollections_add" value="'.$next.'" '.
                      'onclick="javascript:toggleAddmenucoll();" />'.&mt('Add').'</label>';
            $datatable .= &item_table_row_start($add,$count,'','','','LC_left_item');
            foreach my $category (@order) {
                if ((ref($categories{$category}) eq 'ARRAY') && (@{$categories{$category}} > 0)) {
                    $datatable .= '<fieldset id="addmenucoll_'.$category.'" style="display:none; vertical-align:top;"><legend>'.$menutitles{$category}.'</legend>'."\n";
                    foreach my $field (@{$categories{$category}}) {
                        $datatable .= '<label><input type="checkbox" class="LC_menucoll_add" name="menucollections_'.$next.'" value="'.$field.'"'.$disabled.' />'.
                                      $menufields{$field}.'</label><br />';
                    }
                    $datatable .= '</fieldset>';
                }
            }
            $datatable .= &item_table_row_end();
            $count ++;
        }
        return $datatable;
    }
}

sub menuitems_abbreviations {
    my %briefcats = (
                     text => 'pt',
                     links => 'p',
                     list => 'ps',
                     inline => 's',
                    );
    return %briefcats;
}

sub menuitems_categories {
    my @order = ('shown','text','links','list','inline');
    my %categories = (
                       shown => ['top','inline','foot','main'],
                       text  => ['name','role','crs','disc','fdbk'],
                       links => ['pers','logo','menu','comm','roles','help','logout'],
                       list => ['about','prefs','port','wish','anno','rss','srch','brse'],
                       inline => ['cont','grades','chat','people','groups','resv','syll','feeds'],
                     );
    return (\@order,\%categories);
}

sub menuitems_titles {
    return &Apache::lonlocal::texthash (
        shown => 'Hierarchy',
        text  => 'Text',
        links => 'Header links',
        list => 'Drop-down list',
        inline => 'Inline links',
    );
}

sub menuitems_fields {
    return &Apache::lonlocal::texthash (
               top => 'Display header',
               inline => 'Display inline menu',
               foot => 'Display footer',
               main => 'Access to main menu',
               pers => 'Personal',
               logo => 'LON-CAPA',
               menu => 'Home',
               comm => 'Messages',
               roles => 'Roles/Courses',
               help => 'Help',
               logout => 'Logout',
               name => 'Fullname',
               crs => 'Course Title',
               role => 'Current Role',
               disc => 'Discussion',
               fdbk => 'Feedback',
               about => 'Information',
               prefs => 'Preferences',
               port => 'Portfolio',
               wish => 'Stored Links',
               anno => 'Calendar',
               rss => 'RSS Feeds',
               srch => 'Search Library',
               brse => 'Browse Library',
               cont => 'Contents',
               grades => 'Grades',
               chat => 'Chat',
               people => 'People',
               groups => 'Groups',
               resv => 'Reservations',
               syll => 'Syllabus',
               feeds => 'Feeds',
    );
}

sub menucollections_display {
    my ($collections) = @_;
    my %menu;
    my ($ordered,$cats) = &menuitems_categories();
    my @order = @{$ordered};
    my %categories = %{$cats};
    my %menutitles = &menuitems_titles();
    my %menufields = &menuitems_fields();
    foreach my $item (split(/;/,$collections)) {
        my ($num,$value) = split(/\%/,$item);
        if ($num =~ /^\d+$/) {
            my @entries = split(/\&/,$value);
            foreach my $entry (@entries) {
                my ($name,$fields) = split(/=/,$entry);
                $menu{$num}{$name} = $fields;
            }
        }
    }
    my $output = '';
    if (keys(%menu)) {
        my @current = sort { $a <=> $b } keys(%menu);
        foreach my $num (@current) {
            my %checked;
            foreach my $key (keys(%{$menu{$num}})) {
                if (($key eq 'top') || ($key eq 'inline') || ($key eq 'foot') || ($key eq 'main')) {
                    if ($menu{$num}{$key} eq 'y') {
                        $checked{$key} = 1;
                    }
                } else {
                    foreach my $field (split(/,/,$menu{$num}{$key})) {
                        if (exists($menufields{$field})) {
                            $checked{$field} = 1;
                        }
                    }
                }
            }
            if (ref($menu{$num}) eq 'HASH') {
                $output .= '<fieldset><legend>'.&mt('Collection [_1]',$num).'</legend>';
                foreach my $category (@order) {
                    if ((ref($categories{$category}) eq 'ARRAY') && (@{$categories{$category}} > 0)) {
                        $output .= '<fieldset style="vertical-align:top; display:inline-block">'.
                                   '<legend>'.$menutitles{$category}.'</legend>'."\n";
                        if ($category eq 'text') {
                            $output .= '<b>'.&mt('Header Text').'</b><br /><br />';
                        }
                        foreach my $field (@{$categories{$category}}) {
                            if ($field eq 'disc') {
                                $output .= '<br /><b>'.&mt('Footer Text').'</b><br /><br />';
                            }
                            if ($checked{$field}) {
                                $output .= &Apache::lonhtmlcommon::confirm_success($menufields{$field});
                            } else {
                                $output .= &Apache::lonhtmlcommon::confirm_success($menufields{$field},1);
                            }
                            $output .= '<br />';
                        }
                        $output .= '</fieldset>';
                    }
                }
                $output .= '</fieldset>';
            }
        }
    }
    return $output;
}

sub print_linkprotection {
    my ($cdom,$cnum,$settings,$rowtotal,$crstype,$noedit,$context) = @_;

    my %linkprotection;
    my $count = 0;
    my $next = 1;
    my ($datatable,$disabled,$css_class,$dest);
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    my %desc = &linkprot_names();
    my %lt = &Apache::lonlocal::texthash (
       'requ'      => 'Required settings',
       'opti'      => 'Optional settings',
    );
    my $itemcount = 0;

    my $ltiauth;
    if ($context eq 'domain') {
        $ltiauth = 1;
    } else {
        if (exists($env{'course.'.$env{'request.course.id'}.'.internal.ltiauth'})) {
            $ltiauth = $env{'course.'.$env{'request.course.id'}.'.internal.ltiauth'};
        } else {
            my %domdefs = &Apache::lonnet::get_domain_defaults($cdom);
            $ltiauth = $domdefs{'crsltiauth'};
        }
    }
    if ($context eq 'domain') {
        $dest = '/adm/domainprefs';
    } else {
        $dest = '/adm/courseprefs';
    }

    my ($switchserver,$switchmessage);
    $switchserver = &check_switchserver($cdom,$cnum,$context,$dest);
    if ($switchserver) {
        if ($context eq 'domain') {
            $switchmessage = &mt("submit from domain's primary library server: [_1].",$switchserver);
        } elsif ($crstype eq 'Community') {
           $switchmessage = &mt("submit from community's home server: [_1].",$switchserver);
        } else {
            $switchmessage = &mt("submit from course's home server: [_1].",$switchserver);
        }
    }

    if ((ref($settings) eq 'HASH') && (ref($settings->{'linkprot'}) eq 'HASH')) {
        if (keys(%{$settings->{'linkprot'}})) {
            my @current = sort { $a <=> $b } keys(%{$settings->{'linkprot'}});
            $next += $current[-1];
            for (my $i=0; $i<@current; $i++) {
                my $num = $current[$i];
                my %values;
                if (ref($settings->{'linkprot'}->{$num}) eq 'HASH') {
                    %values = %{$settings->{'linkprot'}->{$num}};
                } else {
                    next;
                }
                my $selected;
                if (($values{'version'} eq 'LTI-1p0') || ($values{'version'} eq '')) {
                    $selected = ' selected="selected"';
                }
                $css_class = $itemcount%2?' class="LC_odd_row"':'';
                $datatable .=
                    '<tr '.$css_class.'><td><span class="LC_nobreak">'.
                    '<label><input type="checkbox" name="linkprot_del" value="'.$i.'"'.$disabled.' />'.
                    &mt('Delete?').'</label></span></td><td>';
                my ($usersty,$onclickrequser,%checkedrequser,$onclickreturnurl,%checkedreturnurl,
                    $onclickpassback,%checkedpassback,$passbacksty,%checkedpassbackfmt);
                $passbacksty = 'none';
                $onclickpassback = ' onclick="toggleLinkProtExtra(this.form,'."'passback','passbackparam','1','inline-block','$i'".');"';
                %checkedpassback = (
                    'no' => ' checked="checked"',
                    'yes' => '',
                );
                %checkedpassbackfmt = (
                    '1p1' => ' checked="checked"',
                    '1p0' => '',
                );
                if ($values{'passback'} ne '') {
                    $passbacksty = 'inline-block';
                    $checkedpassback{'yes'} = ' checked="checked"';
                    $checkedpassback{'no'} = '';
                    if ($values{'passbackformat'} eq '1.0') {
                        $checkedpassbackfmt{'1p0'} = ' checked="checked"';
                        $checkedpassbackfmt{'1p1'} = '';
                    }
                }
                if ($ltiauth) {
                    $usersty = 'display:none';
                    $onclickrequser = ' onclick="toggleLinkProtExtra(this.form,'."'requser','optional','1','block','$i'".');"';
                    %checkedrequser = (
                        no => ' checked="checked"',
                        yes  => '',
                    );
                    if ($values{'requser'}) {
                        $checkedrequser{'yes'} = $checkedrequser{'no'};
                        $checkedrequser{'no'} = '';
                    }
                    $datatable .= '<fieldset><legend>'.$lt{'requ'}.'</legend>';
                    if ($values{'requser'}) {
                        $usersty = 'display:inline-block';
                    }
                }
                $onclickreturnurl = ' onclick="toggleLinkProtExtra(this.form,'."'returnurl','divurlparam','1','inline-block','$i'".');"';
                %checkedreturnurl = (
                    no => ' checked="checked"',
                    yes  => '',
                );
                if ($values{'returnurl'} ne '') {
                    $checkedreturnurl{'yes'} = $checkedreturnurl{'no'};
                    $checkedreturnurl{'no'} = '';
                }
                $datatable .=
                    '<span class="LC_nobreak">'.$desc{'name'}.
                    ':<input type="text" size="15" name="linkprot_name_'.$i.'" value="'.$values{'name'}.'" autocomplete="off"'.$disabled.' /></span> '.
                    ('&nbsp;'x2).
                    '<span class="LC_nobreak">'.$desc{'version'}.':<select name="linkprot_version_'.$i.'"'.$disabled.'>'.
                    '<option value="LTI-1p0" '.$selected.'>1.1</option></select></span> '."\n".
                    ('&nbsp;'x2).
                    '<span class="LC_nobreak">'.$desc{'lifetime'}.':<input type="text" name="linkprot_lifetime_'.$i.'"'.
                    ' value="'.$values{'lifetime'}.'" size="3"'.$disabled.' /></span><br /><br />';
                if ($values{'key'} ne '') {
                    $datatable .= '<span class="LC_nobreak">'.$desc{'key'};
                    if ($noedit) {
                        $datatable .= ': ['.&mt('not shown').']';
                    } elsif ($switchserver) {
                        $datatable .= ': ['.&mt('[_1] to view/edit',$switchserver).']';
                    } else {
                        $datatable .= ':<input type="text" size="25" name="linkprot_key_'.$i.'" value="'.$values{'key'}.'" autocomplete="off"'.$disabled.' />';
                    }
                    $datatable .= '</span> '.('&nbsp;'x2);
                } elsif (!$switchserver) {
                    $datatable .= '<span class="LC_nobreak">'.$desc{'key'}.':'.
                                  '<input type="text" size="25" name="linkprot_key_'.$i.'" value="'.$values{'key'}.'" autocomplete="off"'.$disabled.' />'.
                                  '</span> '.('&nbsp;'x2);
                }
                if ($switchserver) {
                    if ($values{'usable'} ne '') {
                        $datatable .= '<div id="linkprot_divcurrsecret_'.$i.'" style="display:inline-block" /><span class="LC_nobreak">'.
                                      $desc{'secret'}.': ['.&mt('not shown').'] '.('&nbsp;'x2).'</span></div>'.
                                      '<span class="LC_nobreak">'.&mt('Change secret?').
                                      '<label><input type="radio" value="0" name="linkprot_changesecret_'.$i.'" onclick="javascript:toggleChgSecret(this.form,'."'$i','secret','linkprot'".');" checked="checked"'.$disabled.' />'.&mt('No').'</label>'.
                                      ('&nbsp;'x2).
                                      '<label><input type="radio" value="1" name="linkprot_changesecret_'.$i.'" onclick="javascript:toggleChgSecret(this.form,'."'$i','secret','linkprot'".');" '.$disabled.' />'.&mt('Yes').'</label>'.('&nbsp;'x2).
                                      '</span><div id="linkprot_divchgsecret_'.$i.'" style="display:none" />'.
                                      '<span class="LC_nobreak"> - '.$switchmessage.'</span>'.
                                      '</div>';
                    } elsif ($values{'key'} eq '') {
                        $datatable .= '<span class="LC_nobreak">'.&mt('Key and Secret are required').' - '.$switchmessage.'</span>'."\n";
                    } else {
                        $datatable .= '<span class="LC_nobreak">'.&mt('Secret required').' - '.$switchmessage.'</span>'."\n";
                    }
                    $datatable .= '<input type="hidden" name="linkprot_id_'.$i.'" value="'.$num.'" />';
                } else {
                    if ($values{'usable'} ne '') {
                        $datatable .= '<div id="linkprot_divcurrsecret_'.$i.'" style="display:inline-block" /><span class="LC_nobreak">'.
                                      $desc{'secret'}.': ['.&mt('not shown').'] '.('&nbsp;'x2).'</span></div>'.
                                      '<span class="LC_nobreak">'.&mt('Change?').
                                      '<label><input type="radio" value="0" name="linkprot_changesecret_'.$i.'" onclick="javascript:toggleChgSecret(this.form,'."'$i','secret','linkprot'".');" checked="checked"'.$disabled.' />'.&mt('No').'</label>'.
                                      ('&nbsp;'x2).
                                      '<label><input type="radio" value="1" name="linkprot_changesecret_'.$i.'" onclick="javascript:toggleChgSecret(this.form,'."'$i','secret','linkprot'".');"'.$disabled.' />'.&mt('Yes').
                                      '</label>&nbsp;&nbsp;</span><div id="linkprot_divchgsecret_'.$i.'" style="display:none" />'.
                                      '<span class="LC_nobreak">'.&mt('New Secret').':'.
                                      '<input type="password" size="20" name="linkprot_secret_'.$i.'" value="" autocomplete="new-password"'.$disabled.' />'.
                                      '<label><input type="checkbox" name="linkprot_visible_'.$i.'" id="linkprot_visible_'.$i.'" onclick="if (this.checked) { this.form.linkprot_secret_'.$i.'.type='."'text'".' } else { this.form.linkprot_secret_'.$i.'.type='."'password'".' }"'.$disabled.' />'.&mt('Visible input').'</label>'.
                                      '<input type="hidden" name="linkprot_id_'.$i.'" value="'.$num.'" /></span></div>';
                    } else {
                        $datatable .=
                            '<span class="LC_nobreak">'.$desc{'secret'}.':'.
                            '<input type="password" size="20" name="linkprot_secret_'.$i.'" value="" autocomplete="new-password"'.$disabled.' />'.
                            '<label><input type="checkbox" name="linkprot_visible_'.$i.'" id="linkprot_visible_'.$i.'" onclick="if (this.checked) { this.form.linkprot_secret_'.$i.'.type='."'text'".' } else { this.form.linkprot_secret_'.$i.'.type='."'password'".' }"'.$disabled.' />'.&mt('Visible input').'</label>'.
                            '<input type="hidden" name="linkprot_id_'.$i.'" value="'.$num.'" /></span>';
                    }
                }
                $datatable .= '<br /><br />'.
                              '<span class="LC_nobreak">'.$desc{'passback'}.'?'.
                              '<label><input type="radio" name="linkprot_passback_'.$i.'" value="0"'.
                              $onclickpassback.$checkedpassback{'no'}.$disabled.' />'.&mt('No').'</label>&nbsp;'.
                              '<label><input type="radio" name="linkprot_passback_'.$i.'" value="1"'.
                              $onclickpassback.$checkedpassback{'yes'}.$disabled.' />'.&mt('Yes').'</label></span><br />'.
                              '<div id="linkprot_passbackparam_'.$i.'" class="LC_floatleft" style="display:'.$passbacksty.'" />'.
                              '<span class="LC_nobreak">'.&mt('Grade format').
                              '<label><input type="radio" name="linkprot_passbackformat_'.$i.'" value="1.1"'.$checkedpassbackfmt{'1p1'}.' />'.
                              &mt('Outcomes Service (1.1)').'</label>'.('&nbsp;'x2).
                              '<label><input type="radio" name="linkprot_passbackformat_'.$i.'" value="1.0"'.$checkedpassbackfmt{'1p0'}.'/>'.
                              &mt('Outcomes Extension (1.0)').'</label></span></div>'.
                              '<div style="padding:0;clear:both;margin:0;border:0"></div>'.
                              '<br />'.
                              '<span class="LC_nobreak">'.$desc{'returnurl'}.'?'.
                              '<label><input type="radio" name="linkprot_returnurl_'.$i.'" value="0"'.
                              $onclickreturnurl.$checkedreturnurl{'no'}.$disabled.' />'.&mt('No').'</label>&nbsp;'.
                              '<label><input type="radio" name="linkprot_returnurl_'.$i.'" value="1"'.
                              $onclickreturnurl.$checkedreturnurl{'yes'}.$disabled.' />'.&mt('Yes').'</label></span>'.
                              '&nbsp;&nbsp;<div id="linkprot_divurlparam_'.$i.'" style="display:none">'.
                              '<span class="LC_nobreak">'.&mt('Parameter name').':'.
                              '<input type="text" size="15" name="linkprot_urlparam_'.$i.'" value="'.$values{'returnurl'}.'" autocomplete="off"'.$disabled.' />'.
                              '</span></div> ';
                if ($ltiauth) {
                    $datatable .= ('&nbsp;'x2).'<span class="LC_nobreak">'.$desc{'requser'}.'?'.
                                  '<label><input type="radio" name="linkprot_requser_'.$i.'" value="0"'.
                                  $onclickrequser.$checkedrequser{'no'}.$disabled.' />'.&mt('No').'</label>&nbsp;'.
                                  '<label><input type="radio" name="linkprot_requser_'.$i.'" value="1"'.
                                  $onclickrequser.$checkedrequser{'yes'}.$disabled.' />'.&mt('Yes').'</label></span>'.
                        '</fieldset>'.
                        '<fieldset id="linkprot_optional_'.$i.'" style="'.$usersty.'"><legend>'.$lt{'opti'}.'</legend>'.
                        &linkprot_options($i,$itemcount,$disabled,\%values,\%desc).
                        '</fieldset>';
                }
                $datatable .= '</td></tr>';
                $itemcount ++;
            }
        }
    }
    $css_class = $itemcount%2?' class="LC_odd_row"':'';
    $datatable .= '<tr '.$css_class.'><td><span class="LC_nobreak">'."\n".
                  '<input type="hidden" name="linkprot_maxnum" value="'.$next.'" />'."\n".
                  '<input type="checkbox" name="linkprot_add" value="1"'.$disabled.' />'.&mt('Add').'</span></td>'."\n".
                  '<td width="100%">';
    my ($usersty,$onclickrequser,%checkedrequser,$onclickreturnurl,%checkedreturnurl,
       $onclickpassback,%checkedpassback,%checkedpassbackfmt);
    if ($ltiauth) {
        $usersty = 'display:none';
        $onclickrequser = ' onclick="toggleLinkProtExtra(this.form,'."'requser','optional','1','block','add'".');"';
        %checkedrequser = (
            no => ' checked="checked"',
            yes  => '',
        );
        $datatable .= '<fieldset><legend>'.$lt{'requ'}.'</legend>';
    }
    $onclickpassback = ' onclick="toggleLinkProtExtra(this.form,'."'passback','passbackparam','1','inline-block','add'".');"';
    %checkedpassback = (
        'no' => ' checked="checked"',
        'yes' => '',
    );
    %checkedpassbackfmt = (
        '1p1' => ' checked="checked"',
        '1p0' => '',
    );
    $onclickreturnurl = ' onclick="toggleLinkProtExtra(this.form,'."'returnurl','divurlparam','1','inline-block','add'".');"';
    %checkedreturnurl = (
        no => ' checked="checked"',
        yes => '',
    );
    $datatable .= '<span class="LC_nobreak">'.$desc{'name'}.
                  ':<input type="text" size="15" name="linkprot_name_add" value="" autocomplete="off"'.$disabled.' /></span> '."\n".
                  ('&nbsp;'x2).
                  '<span class="LC_nobreak">'.$desc{'version'}.':<select name="linkprot_version_add"'.$disabled.'>'.
                  '<option value="LTI-1p0" selected="selected">1.1</option></select></span> '."\n".
                  ('&nbsp;'x2).
                  '<span class="LC_nobreak">'.$desc{'lifetime'}.':<input type="text" size="3" name="linkprot_lifetime_add" value="300"'.$disabled.' /></span> '."\n".
                  '<br /><br />';
    if ($switchserver) {
        $datatable .= '<span class="LC_nobreak">'.&mt('Key and Secret are required').' - '.$switchmessage.'</span>'."\n";
    } else {
        $datatable .= '<span class="LC_nobreak">'.$desc{'key'}.':<input type="text" size="25" name="linkprot_key_add" value="" autocomplete="off"'.$disabled.' /></span> '."\n".
                      ('&nbsp;'x2).
                      '<span class="LC_nobreak">'.$desc{'secret'}.':<input type="password" size="20" name="linkprot_secret_add" value="" autocomplete="new-password"'.$disabled.' />'.
                      '<label><input type="checkbox" name="linkprot_visible_add" id="linkprot_visible_add" onclick="if (this.checked) { this.form.linkprot_secret_add.type='."'text'".' } else { this.form.linkprot_secret_add.type='."'password'".' }"'.$disabled.' />'.&mt('Visible input').'</label></span> '."\n";
    }
    $datatable .= '<br /><br />'.
                  '<span class="LC_nobreak">'.$desc{'passback'}.'?'.
                  '<label><input type="radio" name="linkprot_passback_add" value="0"'.
                  $onclickpassback.$checkedpassback{'no'}.$disabled.' />'.&mt('No').'</label>&nbsp;'.
                  '<label><input type="radio" name="linkprot_passback_add" value="1"'.
                  $onclickpassback.$checkedpassback{'yes'}.$disabled.' />'.&mt('Yes').'</label></span>'.
                  '<br /><div id="linkprot_passbackparam_add" class="LC_floatleft" style="display:none">'.
                  '<span class="LC_nobreak">'.&mt('Grade format').
                  '<label><input type="radio" name="linkprot_passbackformat_add" value="1.1"'.$checkedpassbackfmt{'1p1'}.$disabled.' />'.
                  &mt('Outcomes Service (1.1)').'</label>'.('&nbsp;'x2).
                  '<label><input type="radio" name="linkprot_passbackformat_add" value="1.0"'.$checkedpassbackfmt{'1p0'}.$disabled.' />'.
                  &mt('Outcomes Extension (1.0)').'</label></span></div>'.
                  '<div style="padding:0;clear:both;margin:0;border:0"></div>'.
                  '<br />'.
                  '<span class="LC_nobreak">'.$desc{'returnurl'}.'?'.
                  '<label><input type="radio" name="linkprot_returnurl_add" value="0"'.
                  $onclickreturnurl.$checkedreturnurl{'no'}.$disabled.' />'.&mt('No').'</label>&nbsp;'.
                  '<label><input type="radio" name="linkprot_returnurl_add" value="1"'.
                  $onclickreturnurl.$checkedreturnurl{'yes'}.$disabled.' />'.&mt('Yes').'</label></span>'.
                  '&nbsp;&nbsp;<div id="linkprot_divurlparam_add" style="display:none">'.
                  '<span class="LC_nobreak">'.&mt('Parameter name').':'.
                  '<input type="text" size="15" name="linkprot_urlparam_add" value="" autocomplete="off"'.$disabled.' />'.
                  '</span></div> ';
    if ($ltiauth) {
        $datatable .= ('&nbsp;'x2).'<span class="LC_nobreak">'.$desc{'requser'}.'?'.
                      '<label><input type="radio" name="linkprot_requser_add" value="0"'.
                      $onclickrequser.$checkedrequser{'no'}.$disabled.' />'.&mt('No').'</label>&nbsp;'.
                      '<label><input type="radio" name="linkprot_requser_add" value="1"'.
                      $onclickrequser.$checkedrequser{'yes'}.$disabled.' />'.&mt('Yes').'</label></span>'.
                      '</fieldset>'.
                      '<fieldset id="linkprot_optional_add" style="'.$usersty.'"><legend>'.$lt{'opti'}.'</legend>'.
                      &linkprot_options('add',$itemcount,$disabled,{},\%desc).
                     '</fieldset>';
    }
    $datatable .= '</td></tr>';
    $$rowtotal ++;
    return $datatable;
}

sub linkprot_names {
    return &Apache::lonlocal::texthash(
                                          'version'   => 'LTI Version',
                                          'key'       => 'Key',
                                          'lifetime'  => 'Nonce lifetime (s)',
                                          'name'      => 'Launcher Application',
                                          'secret'    => 'Secret',
                                          'passback'  => 'Can return grades to Launcher',
                                          'returnurl' => 'Launcher return URL',
                                          'requser'   => 'Use identity',
                                          'email'     => 'Email address',
                                          'sourcedid' => 'User ID',
                                          'other'     => 'Other',
                                          'auth'      => 'Display LON-CAPA login page',
                                          'reject'    => 'Discontinue launch process',
                                        );
}

sub check_switchserver {
    my ($cdom,$cnum,$context,$dest) = @_;
    my ($allowed,$switchserver,$home);
    if ($context eq 'domain') {
        $home = &Apache::lonnet::domain($cdom,'primary');
    } else {
        $home = &Apache::lonnet::homeserver($cnum,$cdom);
    }
    unless (($home eq 'no_host') || ($home eq '')) {
        my @ids=&Apache::lonnet::current_machine_ids();
        foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
        if (!$allowed) {
            $switchserver='<a href="/adm/switchserver?otherserver='.$home.'&amp;role='.
                          &HTML::Entities::encode($env{'request.role'},'\'<>"&').
                          '&amp;destinationurl='.$dest.'">'.&mt('Switch Server').'</a>';
        }
    }
    return $switchserver;
}

sub linkprot_options {
    my ($num,$itemcount,$disabled,$current,$desc) = @_;
    my %lt;
    if (ref($desc) eq 'HASH') {
        %lt = %{$desc};
    }
    my $userfieldsty = 'none';
    my (%checked,$userfield);
    $checked{'sourcedid'} = ' checked="checked"';
    $checked{'reject'} = ' checked="checked"';
    if (ref($current) eq 'HASH') {
        if (($current->{'mapuser'} ne '') && ($current->{'mapuser'} ne 'lis_person_sourcedid')) {
            $checked{'sourcedid'} = '';
            if ($current->{'mapuser'} eq 'lis_person_contact_email_primary') {
                $checked{'email'} = ' checked="checked"';
            } else {
                $checked{'other'} = ' checked="checked"';
                $userfield = $current->{'mapuser'};
                $userfieldsty = 'inline-block';
            }
        }
        if (($current->{'notstudent'} ne '') && ($current->{'notstudent'} ne 'reject')) {
            $checked{'reject'} = '';
            $checked{'auth'} = ' checked="checked"';
        }
    }
    my $onclickuser = ' onclick="toggleLinkProtExtra(this.form,'."'mapuser','userfield','other','inline-block','$num'".');"';
    my $output = '<div class="LC_floatleft"><span class="LC_nobreak">'.
                 &mt('Source of LON-CAPA username in LTI request').':&nbsp;';
    foreach my $option ('sourcedid','email','other') {
        $output .= '<label><input type="radio" name="linkprot_mapuser_'.$num.'" value="'.$option.'"'.
                   $checked{$option}.$onclickuser.$disabled.' />'.$lt{$option}.'</label>'.
                   ($option eq 'other' ? '' : ('&nbsp;'x2) );
    }
    $output .= '</span></div>'.
               '<div class="LC_floatleft" style="display:'.$userfieldsty.';" id="linkprot_userfield_'.$num.'">'.
               '<input type="text" name="linkprot_customuser_'.$num.'" '.
               'value="'.$userfield.'"'.$disabled.' /></div>';
    $output .= '<br />'.
               '<div class="LC_floatleft"><span class="LC_nobreak">'.
               &mt('Action when username is not for an enrolled student').':&nbsp;';
    foreach my $option ('reject','auth') {
        $output .= '<label><input type="radio" name="linkprot_notstudent_'.$num.'" value="'.$option.'"'.
                   $checked{$option}.$disabled.' />'.$lt{$option}.'</label>'.
                   ($option eq 'auth' ? '' : ('&nbsp;'x2) );
    }
    $output .= '</span></div>';
    return $output;
}

sub print_extresource_row {
    my ($item,$config,$curr,$noedit) = @_;
    my $onchange;
    unless ($noedit) {
        $onchange = ' onchange="javascript:toggleExtRes();"';
    }
    my $id = 'LC_'.$item;
    my ($selected,$reuse,$width,$height) = split(/:/,$curr);
    my $output = &select_from_options($item,$config->{'order'},
                                      $config->{'options'},$selected,
                                      $config->{'nullval'},
                                      undef,undef,$onchange,$noedit,$id);
    my ($checked,$reusesty,$sizesty);
    if ($reuse) {
        $checked = ' checked="checked"';
    }
    $reusesty = 'none';
    $sizesty = 'none';
    if (($selected eq 'window') || ($selected eq 'tab')) {
        $reusesty = 'inline-block';
        if ($selected eq 'window') {
            $sizesty = 'inline-block';
        }
    }
    $output .= '<div id="LC_extresreusediv" style="display:'.$reusesty.';">'.
               '<span class="LC_nobreak">'.
               '<label><input type="checkbox" name="extwintabreuse" value="1"'.$checked.'>'.
               &mt('Re-use tab/window').'</label>'.
               '</span></div>'.
               '<fieldset id="LC_extressize" style="display:'.$sizesty.';">'.
               '<legend>'.&mt('Window size (optional)').'</legend>'.
               '<span class="LC_nobreak">'.
               &mt('width').':<input type="text" name="extreswinwidth" value="'.$width.'" size="3" />px'.
               ('&nbsp;' x 3).
               &mt('height').':<input type="text" name="extreswinheight" value="'.$height.'" size="3" />px'.
               '</span></fieldset>';
    return $output;
}

sub print_other {
    my ($cdom,$settings,$allitems,$rowtotal,$crstype,$noedit) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($allitems) eq 'ARRAY')) {
        return;
    }
    my @ordered = &get_other_items($cdom,$settings,$allitems);
    my %items;
    foreach my $parameter (@ordered) {
        $items{$parameter} = {
                               text  => '<b>'.$parameter.'</b>',
                               input => 'textbox',
                               size  => '15',
                             },
    }
    push (@ordered,'newp_value');
    $items{'newp_value'} = {
                            text  => '<b>'.&mt('Create New Environment Variable').'</b><br />'.
                                     '<input type="textbox" name="newp_name"'.
                                     ' value="" size="30" />',
                            input => 'textbox',
                            size  => '30',
                           };
    return &make_item_rows($cdom,\%items,\@ordered,$settings,$rowtotal,$crstype,'other',$noedit);
}

sub get_other_items {
    my ($cdom,$settings,$allitems) = @_;
    unless ((ref($settings) eq 'HASH') && (ref($allitems) eq 'ARRAY')) {
        return;
    }
    my @ordered;
    if (ref($settings) eq 'HASH') {
        foreach my $parameter (sort(keys(%{$settings}))) {
            next if (grep/^\Q$parameter\E$/,@{$allitems});
            next if (($parameter eq 'course.helper.not.run') &&
                     (!exists($env{'user.role.dc./'.$env{'request.role.domain'}.'/'})));
            unless (($parameter =~ m/^internal\./)||($parameter =~ m/^metadata\./) ||
                    ($parameter =~ m/^selfenroll_/) || ($parameter =~ /_selfenroll$/)
                    || ($parameter eq 'type') ||
                    ($parameter =~ m/^(cc|co|in|ta|ep|ad|st)\.plaintext$/)
                    || ($parameter =~ m/^discussion_post_fonts/) ||
                    ($parameter =~ m{^(minimal|updated|uploaded|external)syllabus$}) ||
                    ($parameter eq 'clonedfrom')) {
                push(@ordered,$parameter);
            }
        }
    }
    return @ordered;
}

sub item_table_row_start {
    my ($text,$count,$add_class,$colspan,$leftclass,$rightclass) = @_;
    my $output;
    my $css_class = ($count % 2) ? 'LC_odd_row' : 'LC_even_row';
    $css_class = (join(' ',$css_class,$add_class)) unless ($add_class eq '');
    if ($leftclass eq '') {
        $leftclass = 'LC_left_item';
    }
    if ($rightclass eq '') {
        $rightclass = 'LC_right_item';
    }
    $output .= '<tr class="'.$css_class.'">'."\n".
               '<td class="'.$leftclass.'">'.$text.
               '</td>';
    if ($colspan > 1) {
        $output .= '<td class="'.$rightclass.'" colspan="'.$colspan.'">';
    } else {
        $output .= '<td class="'.$rightclass.'">';
    }
    return $output;
}

sub item_table_row_end {
    return '</td></tr>';
}

sub yesno_radio {
    my ($item,$settings,$unsetdefault,$valueyes,$valueno,$noedit,$onclick,$reverse) = @_;
    my $itemon = ' ';
    my $itemoff = ' checked="checked" ';
    if (($valueyes eq '') && ($valueno eq '')) {
        $valueyes = 'yes';
        $valueno = '';
    }
    if (ref($settings) eq 'HASH') {
        if ($settings->{$item} eq $valueyes) {
            $itemon = $itemoff;
            $itemoff = ' ';
        }
        unless (exists($settings->{$item})) {
            if ($unsetdefault eq $valueyes) {
                $itemon = $itemoff;
                $itemoff = ' ';
            }
        }
    }
    my $disabled;
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    } elsif ($onclick) {
        $onclick = ' onclick="'.$onclick.'"';
    }
    if ($reverse) {
        return '<span class="LC_nobreak"><label>'.
               '<input type="radio" name="'.$item.'"'.
               $itemoff.' value="'.$valueno.'"'.$disabled.$onclick.' />'.&mt('No').'</label>&nbsp;'.
               '<label><input type="radio" name="'.$item.'"'.
               $itemon.' value="'.$valueyes.'"'.$disabled.$onclick.' />'.&mt('Yes').'</label></span>';
    } else {
        return '<span class="LC_nobreak"><label>'.
               '<input type="radio" name="'.$item.'"'.
               $itemon.' value="'.$valueyes.'"'.$disabled.$onclick.' />'.&mt('Yes').'</label>&nbsp;'.
               '<label><input type="radio" name="'.$item.'"'.
               $itemoff.' value="'.$valueno.'"'.$disabled.$onclick.' />'.&mt('No').'</label></span>';
    }
}

sub select_from_options {
    my ($item,$order,$options,$curr,$nullval,$multiple,$maxsize,$onchange,$noedit,$id) = @_;
    my $output;
    my $disabled;
    if ($noedit) {
        $disabled = ' disabled=disabled"';
    }
    if ((ref($order) eq 'ARRAY') && (ref($options) eq 'HASH')) {
        $output='<select name="'.$item.'" '.$onchange;
        if ($multiple) {
            $output .= ' multiple="multiple"';
            my $num = @{$order};
            $num ++ if ($nullval ne '');
            if (($maxsize) && ($maxsize < $num)) {
                $output .= ' size="'.$maxsize.'"';
            }
        }
        if ($id ne '') {
            $output .= ' id="'.$id.'"';
        }
        $output .= $disabled.'>'."\n";
        if ($nullval ne '') {
            $output .= '<option value=""';
            if (ref($curr) eq 'ARRAY') {
                if ((@{$curr} == 0) || (grep(/^$/,@{$curr}))) {
                    $output .= ' selected="selected" ';
                }
            } else {
                if ($curr eq '') {
                    $output .= ' selected="selected" ';
                }
            }
            $output .= '>'.$nullval.'</option>';
        }
        foreach my $option (@{$order}) {
            $output.= '<option value="'.$option.'"';
            if (ref($curr) eq 'ARRAY') {
                if (grep(/^\Q$option\E$/,@{$curr})) {
                    $output .= ' selected="selected" ';
                }
            } else {
                if ($option eq $curr) {
                    $output.=' selected="selected"';
                }
            }
            $output.=">$options->{$option}</option>\n";
        }
        $output.="</select>";
    }
    return $output;
}

sub make_item_rows {
    my ($cdom,$items,$ordered,$settings,$rowtotal,$crstype,$caller,$noedit,$cnum) = @_;
    my $datatable;
    if ((ref($items) eq 'HASH') && (ref($ordered) eq 'ARRAY')) {
        my $count = 0;
        foreach my $item (@{$ordered}) {
            $count ++;
            my $colspan;
            if ((($caller eq 'classlists') && ($item eq 'nothideprivileged')) ||
                (($caller eq 'printouts') && ($item ne 'print_header_format'))) {
                $colspan = 2;
            }
            my $rowdesc;
            if ($caller eq 'appearance') {
                $rowdesc = '<span class="LC_nobreak">'.$items->{$item}{text}.'</span>';
            } else {
                $rowdesc = $items->{$item}{text};
            }
            if (exists $items->{$item}{advanced} && $items->{$item}{advanced} == 1) {
                $datatable .= &item_table_row_start($rowdesc,$count,"advanced",$colspan);
            } else {
                $datatable .= &item_table_row_start($rowdesc,$count,undef,$colspan);
            }
            if ($item eq 'defaultcredits') {
                my $defaultcredits = $env{'course.'.$env{'request.course.id'}.'.internal.defaultcredits'};
                my $showcredits;
                if ($defaultcredits ne '') {
                    $showcredits = &mt('Default is [quant,_1,credit]',$defaultcredits);
                } else {
                    $showcredits = &mt('No default set');
                }
                $datatable .= $showcredits;
            } elsif ($item eq 'nothideprivileged') {
                $datatable .= &nothidepriv_row($cdom,$item,$settings,$crstype,$noedit);
            } elsif ($item eq 'checkforpriv') {
                $datatable .= &checkforpriv_row($cdom,$item,$settings,$crstype,$noedit);
            } elsif ($item eq 'print_header_format') {
                $datatable .= &print_hdrfmt_row($item,$settings,$noedit);
            } elsif ($item eq 'lti.lcmenu') {
                $datatable .= &lcmenu_checkboxes($cdom,$item,$settings,$crstype,$noedit);
            } elsif ($item eq 'extresource') {
                $datatable .= &print_extresource_row($item,$items->{$item},$settings->{$item},$noedit);
            } elsif ($items->{$item}{input} eq 'dates') {
               my $disabled;
               if ($noedit) {
                  $disabled = ' disabled="disabled"';
               }
               $datatable .=
                   &Apache::lonhtmlcommon::date_setter('display',$item,
                                                       $settings->{$item},$disabled);
            } elsif ($items->{$item}{input} eq 'radio') {
                my ($unsetdefault,$valueyes,$valueno);
                if (($item eq 'usejsme') || ($item eq 'uselcmath') || ($item eq 'inline_chem')) {
                     my %domdefs = &Apache::lonnet::get_domain_defaults($cdom);
                     unless ($domdefs{$item} eq '0') {
                         $unsetdefault = 1;
                     }
                     $valueyes = "1";
                     $valueno = "0";
                } elsif (($item eq 'lti.topmenu') || ($item eq 'lti.inlinemenu')) {
                    $valueyes = '1';
                }
                $datatable .= &yesno_radio($item,$settings,$unsetdefault,$valueyes,$valueno,$noedit);
            } elsif ($items->{$item}{input} eq 'selectbox') {
                my ($id,$onchange);
                if ($caller eq 'menuitems') {
                    $id = $item;
                } elsif ($caller eq 'grading') {
                    if ($item eq 'grading') {
                        $onchange = ' onchange="javascript:toggleGrading(this.form);"';
                        $id = $item;
                    }
                }
                my $curr = $settings->{$item};
                $datatable .=
                    &select_from_options($item,$items->{$item}{'order'},
                                         $items->{$item}{'options'},$curr,
                                         $items->{$item}{'nullval'},
                                         undef,undef,$onchange,$noedit,$id);
                if ($item eq 'grading') {
                    my ($unsetdefault,$valueyes,$valueno,$sectionbox);
                    my $gradingsty = 'none';
                    my $gradingsecsty = 'none';
                    $unsetdefault = 0;
                    my (@selsec,@sections,%current);
                    if ($curr eq 'standard') {
                        $gradingsty = 'inline-block';
                        if (ref($settings) eq 'HASH') {
                            $current{'hidetotals'} = $settings->{'hidetotals'};
                            if ($settings->{'hidetotals'} =~ /^([\w,]+)$/) {
                                my $secstr = $1;
                                unless ($secstr eq 'all') {
                                    @selsec = split(/,/,$secstr);
                                }
                                $current{'hidetotals'} = 1;
                            }
                        }
                    }
                    $valueyes = "1";
                    $valueno = "0";
                    my %sections = &Apache::loncommon::get_sections($cdom,$cnum);
                    if (keys(%sections)) {
                        @sections = sort( { $a <=> $b } keys(%sections));
                    }
                    my $onclick = 'javascript:toggleHiddenTotalsSec(this.form);';
                    my $sectionbox = '<div id="sectotalsdiv" style="display:'.$gradingsecsty.'; float:right">';
                    my $reverse = 1;
                    if (@sections) {
                        $sectionbox .= '&nbsp;...&nbsp;'.&mt('hidden in sections').':&nbsp;'.
                                       '<div style="position: relative; top: 0%;">'.
                                       &select_sections('hidetotals','',\@sections,\@selsec,$noedit,'all').
                                       '</div>';
                    }
                    $sectionbox .= '</div>';
                    $datatable .= '<fieldset id="hidetotalsdiv" style="display:'.$gradingsty.';">'.
                                  '<legend style="font-weight: normal;">'.
                                  &mt('Hide Course Points Totals').'</legend>'.
                                  '<div style="position: relative; top: 0%; float:left">'.
                                  &yesno_radio('hidetotals',\%current,$unsetdefault,$valueyes,$valueno,$noedit,
                                               $onclick,$reverse).'</div>'.
                                  $sectionbox.
                                  '</fieldset><div style="padding:0;clear:both;margin:0;border:0"></div>';
                }
            } elsif ($items->{$item}{input} eq 'textbox') {
                my $disabled;
                if ($noedit) {
                    $disabled = ' disabled=disabled"';
                }
                $datatable .= 
                    &Apache::lonhtmlcommon::textbox($item,$settings->{$item},
                                                    $items->{$item}{size},
                                                    $disabled);
            }
            $datatable .= &item_table_row_end();
        }
        if (ref($rowtotal)) {
            $$rowtotal += scalar(@{$ordered});
        }
    }
    return $datatable;
}

sub nothidepriv_row {
    my ($cdom,$item,$settings,$crstype,$noedit) = @_;
    my ($cnum) = &get_course();
    my ($datatable,%nothide,@checkdoms);
    if (ref($settings) eq 'HASH') {
        if ($settings->{$item} ne '') {
            foreach my $user (split(/\s*\,\s*/,$settings->{$item})) {
                if ($user !~ /:/) {
                    $nothide{join(':',split(/[\@]/,$user))}=1;
                } else {
                    $nothide{$user} = 1;
                }
            }
        }
        if ($settings->{'checkforpriv'}) {
            @checkdoms = split(/,/,$settings->{'checkforpriv'});
        }
    }
    push(@checkdoms,$cdom);
    my %coursepersonnel =
        &Apache::lonnet::get_my_roles($cnum,$cdom,'',['previous','future','active']);
    my @privusers;
    foreach my $person (keys(%coursepersonnel)) {
        my ($uname,$udom,$role) = split(/:/,$person);
        my $user = $uname.':'.$udom;
        my ($start,$end) = split(/:/,$coursepersonnel{$person});
        if ($end == -1 || $start == -1) {
            next;
        }
        foreach my $dom (@checkdoms) {
            if (&Apache::lonnet::privileged($uname,$udom,\@checkdoms,['dc','su'])) {
                unless (grep(/^\Q$user\E$/,@privusers)) {
                    push(@privusers,$user);
                }
            }
        }
    }
    if (@privusers > 0) {
        my $disabled;
        if ($noedit) {
           $disabled = ' disabled="disabled"';
        }
        $datatable .= '<table align="right">';
        foreach my $user (sort(@privusers)) {
            my $hideon = ' checked="checked" ';
            my $hideoff = '';
            if ($nothide{$user}) {
                $hideoff = $hideon;
                $hideon = '';
            }
            my ($uname,$udom) = split(':',$user);
            $datatable .=  '<tr><td align="left">'.
                           &Apache::loncommon::aboutmewrapper(
                           &Apache::loncommon::plainname($uname,$udom,'firstname'),
                           $uname,$udom,'aboutuser').
                          '</td><td align="left">'.
                          '<span class="LC_nobreak"><label>'.
                          '<input type="radio" name="'.$item.'_'.$user.'"'.
                          $hideon.' value=""'.$disabled.' />'.&mt('Hidden').'</label>&nbsp;'.
                          '<label><input type="radio" name="'.$item.'_'.$user.'"'.
                          $hideoff.' value="yes"'.$disabled.' />'.&mt('Shown').'</label></span></td>'.
                          '</tr>';
        }
        $datatable .= '</table>';
    } else {
        if ($crstype eq 'Community') {
            $datatable .= &mt('No Domain Coordinators have community roles');
        } else {
            $datatable .= &mt('No Domain Coordinators have course roles');
        }
    }
    return $datatable;
}

sub checkforpriv_row {
    my ($cdom,$item,$settings,$crstype,$noedit) = @_;
    my $datatable;
    my %domains=map { $_ => 1; } &Apache::lonnet::all_domains();
    if (keys(%domains) == 1) {
        $datatable = '</td><td align="right">'.
                     &mt("Course's domain is only domain");
        return $datatable;
    }
    my @excdoms = ($cdom);
    my $num = 0;
    if ($settings->{$item} eq '') {
        $datatable = '</td><td align="right">'.
                     &Apache::loncommon::select_dom_form('','checkforpriv_'.$num,
                                                         1,1,undef,undef,\@excdoms,
                                                         $noedit);
    } else {
        my @privdoms = split(/,/,$settings->{$item});
        my %domains=map { $_ => 1; } &Apache::lonnet::all_domains();
        $datatable = '</td><td align="right"><br />'.
                     &Apache::loncommon::start_data_table();
        my $disabled;
        if ($noedit) {
            $disabled = ' disabled="disabled"';
        }
        if (@privdoms > 0) {
            foreach my $currdom (@privdoms) {
                next unless ($domains{$currdom});
                my $domdesc = &Apache::lonnet::domain($currdom,'description');
                if ($domdesc eq '') {
                    $domdesc = $currdom;
                }
                $datatable .=
                    &Apache::loncommon::start_data_table_row().
                    '<td align="left"><span class="LC_nobreak">'.
                    &mt('Domain:').'<b>&nbsp;'.$domdesc.
                    '</b><input type="hidden" name="checkforpriv_'.$num.
                    '" value="'.$currdom.'" /></span><br />'.
                    '<span class="LC_nobreak"><label><input type="checkbox" '.
                    'name="checkforpriv_delete" value="'.$num.'"'.$disabled.' />'.
                    &mt('Delete').'</label></span></td>'.
                    &Apache::loncommon::end_data_table_row();
                $num ++;
                unless (grep(/^\Q$currdom\E$/,@excdoms)) {
                    push(@excdoms,$currdom);
                }
            }
        }
        if ((scalar(keys(%domains)) - scalar(@excdoms)) > 0) {
            $datatable .=
                &Apache::loncommon::start_data_table_row().
                '<td align="left"><span class="LC_nobreak">'.
                &mt('Additional domain:'). '</span><br />'.
                &Apache::loncommon::select_dom_form('','checkforpriv_'.$num,1,
                                                    1,undef,undef,\@excdoms,$noedit).
                '</td>'.&Apache::loncommon::end_data_table_row();
        }
        $datatable .= &Apache::loncommon::end_data_table().
                      '<input type="hidden" name="checkforpriv_total" value="'.$num.'" />'.
                      '<br />';
    }
    return $datatable;
}

sub print_hdrfmt_row {
    my ($item,$settings,$noedit) = @_;
    my @curr;
    my $currnum = 0;
    my $maxnum = 2;
    my $currstr;
    if ($settings->{$item} ne '') {
        $currstr .= '<b>'.&mt('Current print header:').' <span class="LC_warning"><tt>'.
                   $settings->{$item}.'</tt></span></b><br />';
        my @current = split(/(%\d*[nca])/,$settings->{$item});
        foreach my $val (@current) {
            unless ($val eq '') {
                push(@curr,$val);
            }
        }
        $currnum = @curr;
        $maxnum += $currnum;
    }

    my $output = <<ENDJS;

<script type="text/javascript" language="Javascript">

function reOrder(chgnum) {
    var maxnum = $maxnum;
    var oldidx = 'printfmthdr_oldpos_'+chgnum;
    var newidx = 'printfmthdr_pos_'+chgnum;
    oldidx = getIndexByName(oldidx);
    newidx = getIndexByName(newidx);
    var oldpos = document.display.elements[oldidx].value;
    var newpos = document.display.elements[newidx].options[document.display.elements[newidx].selectedIndex].value;
    document.display.elements[oldidx].value = newpos;
    var chgtype = 'up';
    if (newpos < oldpos) {
        chgtype = 'down';
    }
    for (var j=0; j<maxnum; j++) {
        if (j != chgnum) {
            oldidx = 'printfmthdr_oldpos_'+j;
            newidx = 'printfmthdr_pos_'+j;
            oldidx = getIndexByName(oldidx);
            newidx = getIndexByName(newidx);
            var currpos = document.display.elements[newidx].options[document.display.elements[newidx].selectedIndex].value;
            var currsel = document.display.elements[newidx].selectedIndex;
            if (chgtype == 'up') {
                if ((currpos > oldpos) && (currpos <= newpos)) {
                    document.display.elements[newidx].selectedIndex = currsel-1;
                    document.display.elements[oldidx].value = document.display.elements[newidx].options[document.display.elements[newidx].selectedIndex].value;
                }
            } else {
                if ((currpos >= newpos) && (currpos < oldpos)) {
                    document.display.elements[newidx].selectedIndex = currsel+1;
                    document.display.elements[oldidx].value = document.display.elements[newidx].options[document.display.elements[newidx].selectedIndex].value;
                }
            }
        }
    }
    return;
}

function getIndexByName(item) {
    for (var i=0;i<document.display.elements.length;i++) {
        if (document.display.elements[i].name == item) {
            return i;
        }
    }
    return -1;
}

</script>

ENDJS
    $output .= '</td><td align="right"><br />'.
               $currstr.'<table class="LC_data_table">';
    my $disabled;
    if ($noedit) {
        $disabled = ' disabled="disabled"';
    }
    if (@curr > 0) {
        for (my $i=0; $i<@curr; $i++) {
            my $pos = $i+1;
            $output .= '<tr>'.
                       '<td align="left"><span class="LC_nobreak">'.
                       &position_selector($pos,$i,$maxnum,$disabled).&mt('Delete:').
                       '<input type="checkbox" name="printfmthdr_del_'.$i.
                       '"'.$disabled.' /></span></td>';
            if ($curr[$i] =~ /^%\d*[nca]$/) {
                my ($limit,$subst) = ($curr[$i] =~ /^%(\d*)([nca])$/);
                $output .= '<td align="left">'.
                           &substitution_selector($i,$subst,$limit,$disabled).'</td>';
            } else {
                $output .= '<td colspan="2" align="left">'.&mt('Text').'<br />'.
                           '<input type="textbox" name="printfmthdr_text_'.$i.'"'.
                           ' value="'.$curr[$i].'" size="25"'.$disabled.' /></td>';
            }
            $output .= '</tr>';
        }
    }
    my $pos = $currnum+1;
    unless ($noedit) {
        $output .= 
               '<tr>'.
               '<td align="left"><span class="LC_nobreak">'.
               &position_selector($pos,$currnum,$maxnum).
               '<b>'.&mt('New').'</b></span></td><td align="left">'.
               &substitution_selector($currnum).'</td>'.
               '</tr>'; 
        $pos ++;
        $currnum ++;
        $output .= 
               '<tr>'.
               '<td align="left"><span class="LC_nobreak">'.
               &position_selector($pos,$currnum,$maxnum).
               '<b>'.&mt('New').'</b></span></td>'.
               '<td colspan="2" align="left">'.&mt('Text').'<br />'.
               '<input type="textbox" name="printfmthdr_text_'.$currnum.
               '" value="" size ="25" />'.
               '<input type="hidden" name="printfmthdr_maxnum" value="'.
                $maxnum.'" /></td>'.
               '</tr>';
    }
    $output .= '</table><br />';
    return $output;
}

sub position_selector {
    my ($pos,$num,$maxnum,$disabled) = @_;
    my $output = '<select name="printfmthdr_pos_'.$num.'" onchange="reOrder('."'$num'".');"'.$disabled.'>';
    for (my $j=1; $j<=$maxnum; $j++) {
        my $sel = '';
        if ($pos == $j) {
            $sel = ' selected="selected"';
        }
        $output .= '<option value="'.$j.'"'.$sel.'">'.$j.'</option>';
    }
    $output .= '</select><input type="hidden" name="printfmthdr_oldpos_'.$num.
               '" value="'.$pos.'" />';
    return $output;
}

sub substitution_selector {
    my ($num,$subst,$limit,$crstype,$disabled) = @_;
    my ($stunametxt,$crsidtxt);
    if ($crstype eq 'Community') {
        $stunametxt = 'member name';
        $crsidtxt = 'community ID',
    } else {
        $stunametxt = 'student name';
        $crsidtxt = 'course ID',
    }
    my %lt = &Apache::lonlocal::texthash(
                    n => $stunametxt,
                    c => $crsidtxt,
                    a => 'assignment note',
             );
    my $output .= &mt('Substitution').'<br />'.
                  '<select name="printfmthdr_sub_'.$num.'"'.$disabled.'>';
    if ($subst eq '') {
        $output .= '<option value="" selected="selected"> </option>';
    }
    foreach my $field ('n','c','a') {
        my $sel ='';
        if ($subst eq $field) {
            $sel = ' selected="selected"';
        }
        $output .= '<option value="'.$field.'"'.$sel.'>'.
                   $lt{$field}.'</option>';
    }
    $output .= '</select></td><td align="left">'.&mt('Size limit').'<br />'.
               '<input type="textbox" name="printfmthdr_limit_'.$num.
               '" value="'.$limit.'" size="5"'.$disabled.' /></span>';
    return $output;
}

sub change_clone {
    my ($cdom,$cnum,$clonelist,$oldcloner) = @_;
    my $clone_crs = $cnum.':'.$cdom;
    if ($cnum && $cdom) {
        my $clone_crs = $cnum.':'.$cdom;
        my @allowclone;
        if ($clonelist =~ /,/) {
            @allowclone = split(',',$clonelist);
        } else {
            $allowclone[0] = $clonelist;
        }
        foreach my $currclone (@allowclone) {
            if (!grep(/^$currclone$/,@$oldcloner)) {
                if ($currclone ne '*') {
                    if ($currclone =~ /:/) {
                        my ($uname,$udom) = split(/:/,$currclone);
                        if ($uname && $udom && $uname ne '*') {
                            if (&Apache::lonnet::homeserver($uname,$udom) ne 'no_host') {
                                my %currclonecrs = &Apache::lonnet::dump('environment',$udom,$uname,'cloneable');
                                if ($currclonecrs{'cloneable'} !~ /\Q$clone_crs\E/) {
                                    if ($currclonecrs{'cloneable'} eq '') {
                                        $currclonecrs{'cloneable'} = $clone_crs;
                                    } else {
                                        $currclonecrs{'cloneable'} .= ','.$clone_crs;
                                    }
                                    &Apache::lonnet::put('environment',\%currclonecrs,$udom,$uname);
                                }
                            }
                        }
                    }
                }
            }
        }
        foreach my $oldclone (@$oldcloner) {
            if (!grep(/^\Q$oldclone\E$/,@allowclone)) {
                if ($oldclone ne '*') {
                    if ($oldclone =~ /:/) {
                        my ($uname,$udom) = split(/:/,$oldclone);
                        if ($uname && $udom && $uname ne '*' ) {
                            if (&Apache::lonnet::homeserver($uname,$udom) ne 'no_host') {
                                my %currclonecrs = &Apache::lonnet::dump('environment',$udom,$uname,'cloneable');
                                my %newclonecrs = ();
                                if ($currclonecrs{'cloneable'} =~ /\Q$clone_crs\E/) {
                                    if ($currclonecrs{'cloneable'} =~ /,/) {
                                        my @currclonecrs = split/,/,$currclonecrs{'cloneable'};
                                        foreach my $crs (@currclonecrs) {
                                            if ($crs ne $clone_crs) {
                                                $newclonecrs{'cloneable'} .= $crs.',';
                                            }
                                        }
                                        $newclonecrs{'cloneable'} =~ s/,$//;
                                    } else {
                                        $newclonecrs{'cloneable'} = '';
                                    }
                                    &Apache::lonnet::put('environment',\%newclonecrs,$udom,$uname);
                                }
                            }
                        }
                    }
                }
            }
        }
    }
    return;
}

sub devalidate_remote_courseprefs {
    my ($cdom,$cnum,$cachekeys) = @_;
    return unless (ref($cachekeys) eq 'HASH');
    my %servers = &Apache::lonnet::internet_dom_servers($cdom);
    my %thismachine;
    map { $thismachine{$_} = 1; } &Apache::lonnet::current_machine_ids();
    my @posscached = ('courselti','courseltitools');
    if (keys(%servers)) {
        foreach my $server (keys(%servers)) {
            next if ($thismachine{$server});
            my @cached;
            foreach my $name (@posscached) {
                if ($cachekeys->{$name}) {
                    push(@cached,&escape($name).':'.&escape($cdom.'_'.$cnum));
                }
            }
            if (@cached) {
                &Apache::lonnet::remote_devalidate_cache($server,\@cached);
            }
        }
    }
    return;
}

1;

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