--- loncom/auth/lonroles.pm 2006/05/30 12:45:24 1.149
+++ loncom/auth/lonroles.pm 2009/02/09 04:14:03 1.216
@@ -1,7 +1,7 @@
# The LearningOnline Network with CAPA
# User Roles Screen
#
-# $Id: lonroles.pm,v 1.149 2006/05/30 12:45:24 www Exp $
+# $Id: lonroles.pm,v 1.216 2009/02/09 04:14:03 raeburn Exp $
#
# Copyright Michigan State University Board of Trustees
#
@@ -27,6 +27,103 @@
#
###
+=pod
+
+=head1 NAME
+
+Apache::lonroles - User Roles Screen
+
+=head1 SYNOPSIS
+
+Invoked by /etc/httpd/conf/srm.conf:
+
+
+ PerlAccessHandler Apache::lonacc
+ SetHandler perl-script
+ PerlHandler Apache::lonroles
+ ErrorDocument 403 /adm/login
+ ErrorDocument 500 /adm/errorhandler
+
+
+=head1 OVERVIEW
+
+=head2 Choosing Roles
+
+C is a handler that allows a user to switch roles in
+mid-session. LON-CAPA attempts to work with "No Role Specified", the
+default role that a user has before selecting a role, as widely as
+possible, but certain handlers for example need specification which
+course they should act on, etc. Both in this scenario, and when the
+handler determines via C's C<&allowed> function that a certain
+action is not allowed, C is used as error handler. This
+allows the user to select another role which may have permission to do
+what they were trying to do. C can also be accessed via the
+B button in the Remote Control.
+
+=begin latex
+
+\begin{figure}
+\begin{center}
+\includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
+ \caption{\label{Sample_Roles_Screen}Sample Roles Screen}
+\end{center}
+\end{figure}
+
+=end latex
+
+=head2 Role Initialization
+
+The privileges for a user are established at login time and stored in the session environment. As a consequence, a new role does not become active till the next login. Handlers are able to query for privileges using C's C<&allowed> function. When a user first logs in, their role is the "common" role, which means that they have the sum of all of their privileges. During a session it might become necessary to choose a particular role, which as a consequence also limits the user to only the privileges in that particular role.
+
+=head1 INTRODUCTION
+
+This module enables a user to select what role he wishes to
+operate under (instructor, student, teaching assistant, course
+coordinator, etc). These roles are pre-established by the actions
+of upper-level users.
+
+This is part of the LearningOnline Network with CAPA project
+described at http://www.lon-capa.org.
+
+=head1 HANDLER SUBROUTINE
+
+This routine is called by Apache and mod_perl.
+
+=over 4
+
+=item *
+
+Roles Initialization (yes/no)
+
+=item *
+
+Get Error Message from Environment
+
+=item *
+
+Who is this?
+
+=item *
+
+Generate Page Output
+
+=item *
+
+Choice or no choice
+
+=item *
+
+Table
+
+=item *
+
+Privileges
+
+=back
+
+=cut
+
+
package Apache::lonroles;
use strict;
@@ -39,9 +136,11 @@ use Apache::loncommon;
use Apache::lonhtmlcommon;
use Apache::lonannounce;
use Apache::lonlocal;
+use Apache::lonpageflip();
+use Apache::lonnavdisplay();
use GDBM_File;
-use lib '/home/httpd/lib/perl/';
-use LONCAPA;
+use LONCAPA qw(:DEFAULT :match);
+use HTML::Entities;
sub redirect_user {
@@ -53,8 +152,8 @@ sub redirect_user {
my $swinfo=&Apache::lonmenu::rawconfig();
my $navwindow;
if ($launch_nav eq 'on') {
- $navwindow.=&Apache::lonnavmaps::launch_win('now',undef,undef,
- ($url =~ m-^/adm/whatsnew-));
+ $navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
+ ($url =~ m-^/adm/whatsnew-));
} else {
$navwindow.=&Apache::lonnavmaps::close();
}
@@ -77,6 +176,21 @@ ENDREDIR
return;
}
+sub error_page {
+ my ($r,$error,$dest)=@_;
+ &Apache::loncommon::content_type($r,'text/html');
+ &Apache::loncommon::no_cache($r);
+ $r->send_http_header;
+ return OK if $r->header_only;
+ $r->print(&Apache::loncommon::start_page('Problems during Course Initialization').
+ ''.
+ '
'.&mt('The following problems occurred:').
+ $error.
+ '
'.&mt('Continue').''.
+ &Apache::loncommon::end_page());
+}
+
sub handler {
my $r = shift;
@@ -90,29 +204,90 @@ sub handler {
# ================================================================== Roles Init
if ($env{'form.selectrole'}) {
+
+ my $locknum=&Apache::lonnet::get_locks();
+ if ($locknum) { return 409; }
+
if ($env{'form.newrole'}) {
$env{'form.'.$env{'form.newrole'}}=1;
}
if ($env{'request.course.id'}) {
+ # Check if user is CC trying to select a course role
+ if ($env{'form.switchrole'}) {
+ if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
+ &adhoc_course_role($then);
+ }
+ }
my %temp=('logout_'.$env{'request.course.id'} => time);
&Apache::lonnet::put('email_status',\%temp);
&Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
}
- &Apache::lonnet::appenv("request.course.id" => '',
- "request.course.fn" => '',
- "request.course.uri" => '',
- "request.course.sec" => '',
- "request.role" => 'cm',
- "request.role.adv" => $env{'user.adv'},
- "request.role.domain" => $env{'user.domain'});
-
-# Check if user is a DC trying to enter a course and needs privs to be created
+ &Apache::lonnet::appenv({"request.course.id" => '',
+ "request.course.fn" => '',
+ "request.course.uri" => '',
+ "request.course.sec" => '',
+ "request.role" => 'cm',
+ "request.role.adv" => $env{'user.adv'},
+ "request.role.domain" => $env{'user.domain'}});
+# Check if user is a DC trying to enter a course or author space and needs privs to be created
if ($numdc > 0) {
foreach my $envkey (keys %env) {
+# Is this an ad-hoc CC-role?
if (my ($domain,$coursenum) =
- ($envkey =~ m-^form\.cc\./(\w+)/(\w+)$-)) {
+ ($envkey =~ m-^form\.cc\./($match_domain)/($match_courseid)$-)) {
if ($dcroles{$domain}) {
- &check_privs($domain,$coursenum,$then,$now);
+ &check_privs($domain,$coursenum,$then,$now,'cc');
+ }
+ last;
+ }
+# Is this an ad-hoc CA-role?
+ if (my ($domain,$user) =
+ ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
+ if (($domain eq $env{'user.domain'}) && ($user eq $env{'user.name'})) {
+ delete($env{$envkey});
+ $env{'form.au./'.$domain.'/'} = 1;
+ my ($server_status,$home) = &check_author_homeserver($user,$domain);
+ if ($server_status eq 'switchserver') {
+ my $trolecode = 'au./'.$domain.'/';
+ my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
+ $r->internal_redirect($switchserver);
+ }
+ last;
+ }
+ if (my ($castart,$caend) = ($env{'user.role.ca./'.$domain.'/'.$user} =~ /^(\d*)\.(\d*)$/)) {
+ if (((($castart) && ($castart < $now)) || !$castart) &&
+ ((!$caend) || (($caend) && ($caend > $now)))) {
+ my ($server_status,$home) = &check_author_homeserver($user,$domain);
+ if ($server_status eq 'switchserver') {
+ my $trolecode = 'ca./'.$domain.'/'.$user;
+ my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
+ $r->internal_redirect($switchserver);
+ }
+ last;
+ }
+ }
+ # Check if author blocked ca-access
+ my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
+ if ($blocked{'domcoord.author'} eq 'blocked') {
+ delete($env{$envkey});
+ $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
+ last;
+ }
+ if ($dcroles{$domain}) {
+ my ($server_status,$home) = &check_author_homeserver($user,$domain);
+ if (($server_status eq 'ok') || ($server_status eq 'switchserver')) {
+ &check_privs($domain,$user,$then,$now,'ca');
+ if ($server_status eq 'switchserver') {
+ my $trolecode = 'ca./'.$domain.'/'.$user;
+ my $switchserver = '/adm/switchserver?'
+ .'otherserver='.$home.'&role='.$trolecode;
+ $r->internal_redirect($switchserver);
+ }
+ } else {
+ delete($env{$envkey});
+ }
+ } else {
+ delete($env{$envkey});
}
last;
}
@@ -134,8 +309,10 @@ sub handler {
# store role if recent_role list being kept
if ($env{'environment.recentroles'}) {
+ my %frozen_roles =
+ &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
&Apache::lonhtmlcommon::store_recent('roles',
- $trolecode,' ');
+ $trolecode,' ',$frozen_roles{$trolecode});
}
@@ -147,7 +324,7 @@ sub handler {
my $authnum=$cnum;
if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
($authnum,$authdom)=
- split(/\W/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
+ split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
}
# check with key authority
unless (&Apache::lonnet::validate_access_key(
@@ -172,8 +349,11 @@ sub handler {
$cdom,$cnum,
$env{'user.domain'},
$env{'user.name'},
- 'Assigned from '.$ENV{'REMOTE_ADDR'}.' at '.localtime().' for '.
- $trolecode);
+ &mt('Assigned from [_1] at [_2] for [_3]'
+ ,$ENV{'REMOTE_ADDR'}
+ ,&Apache::lonlocal::locallocaltime()
+ ,$trolecode)
+ );
unless ($assignresult eq 'ok') {
$assignresult=~s/^error\:\s*//;
$message=&mt($assignresult).
@@ -183,13 +363,13 @@ sub handler {
}
$r->print(<
+
$end_page
@@ -206,7 +386,7 @@ ENDENTEREDKEY
my $end_page=&Apache::loncommon::end_page();
$r->print(<
+
');
+ if ($countfuture) {
+ $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
+ my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
+ $nochoose);
+ &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
+ \%roletext);
+ my $tremark='';
+ my $tbg;
+ if ($env{'request.role'} eq 'cm') {
+ $tbg="LC_roles_selected";
+ $tremark=&mt('Currently selected.').' ';
+ } else {
+ $tbg="LC_roles_is";
+ }
+ $r->print(&Apache::loncommon::start_data_table_row()
+ .'
'
+ .'
'
+ .&mt('No role specified')
+ .'
'
+ .'
'.$tremark.'
'
+ .&Apache::loncommon::end_data_table_row()
+ );
+
+ $r->print(&Apache::loncommon::end_data_table());
+ }
+ $r->print(&Apache::loncommon::end_page());
return OK;
}
-# More than one possible role
# ----------------------------------------------------------------------- Table
- unless (($advanced) || ($nochoose)) {
+ unless ((!&Apache::lonmenu::show_course()) || ($nochoose) || ($countactive==1)) {
$r->print("
".&mt('Select a Course to Enter')."
\n");
}
- $r->print('
');
- unless ($nochoose) { $r->print('
'); }
- $r->print('
'.&mt('User Role').'
'.&mt('Extent').
- '
'.&mt('Start').'
'.&mt('End').'
'."\n");
- my $doheaders=-1;
- foreach my $type ('Domain','Construction Space','Course','System') {
- my $haverole=0;
- foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
- if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
- $haverole=1;
- }
- }
- if ($haverole) { $doheaders++; }
- }
-
+ my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
if ($env{'environment.recentroles'}) {
my %recent_roles =
&Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
@@ -634,8 +864,9 @@ ENDHEADER
foreach (sort(keys(%recent_roles))) {
if (defined($roletext{'user.role.'.$_})) {
$output.=$roletext{'user.role.'.$_};
- if ($_ =~ m-dc\./(\w+)/- && $dcroles{$1}) {
- $output .= &allcourses_row($1,'recent');
+ if ($_ =~ m-dc\./($match_domain)/-
+ && $dcroles{$1}) {
+ $output .= &adhoc_roles_row($1,'recent');
}
} elsif ($numdc > 0) {
unless ($_ =~/^error\:/) {
@@ -644,125 +875,310 @@ ENDHEADER
}
}
if ($output) {
- $r->print("
'
+ .&Apache::loncommon::end_data_table_empty_row()
+ );
+ }
+ $r->print($output);
+ }
+ }
}
- my $tremark='';
- my $tfont='#003300';
- if ($env{'request.role'} eq 'cm') {
- $r->print('
');
- $tremark=&mt('Currently selected. ');
- $tfont='#002200';
+}
+
+sub findcourse_advice {
+ my ($r) = @_;
+ my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
+ my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
+ if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
+ $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
+
+
'.&mt('The course has yet to be created.').'
+
'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'
+
'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'
+
'.&mt('The start date for automated enrollment has yet to be reached.').'
+
'.&mt('You registered for the course recently and there is a time lag between the time you register, and the time this information becomes available for the update of LON-CAPA course rosters.').'
+
');
} else {
- $r->print('
');
+ $r->print(&mt('If you were expecting to see an active role listed for a particular course, that course may not have been created yet.').' ');
}
- unless ($nochoose) {
- if ($env{'request.role'} ne 'cm') {
- $r->print('
');
- } else {
- $r->print('
');
- }
- }
- $r->print('
'.&mt('No role specified').
- '
'.$tremark.
- '
'."\n");
+ $r->print('
'.&mt('The [_1]Course Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created.','','',$domdesc).' ');
+ $r->print(&mt('You can search the course catalog for courses which permit self-enrollment, if you would like to enroll in a course.').'
');
- foreach (sort split(/:/,$env{$envkey})) {
- if ($_) {
- my ($prv,$restr)=split(/\&/,$_);
- my $trestr='';
- if ($restr ne 'F') {
- my $i;
- $trestr.=' (';
- for ($i=0;$iprint('
'.
- Apache::lonnet::plaintext($prv).$trestr.
- '
');
+sub privileges_info {
+ my ($which) = @_;
+ my $output;
+
+ $which ||= $env{'request.role'};
+
+ foreach my $envkey (sort(keys(%env))) {
+ next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
+
+ my $where=$1;
+ my $ttype;
+ my $twhere;
+ my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
+ if ($trest) {
+ if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
+ $ttype='Construction Space';
+ $twhere='User: '.$trest.', Domain: '.$tdom;
+ } else {
+ $ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
+ $twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
+ if ($tsec) {
+ my $sec_type = 'Section';
+ if (exists($env{"user.role.gr.$where"})) {
+ $sec_type = 'Group';
}
+ $twhere.=' ('.$sec_type.': '.$tsec.')';
}
- $r->print('