# The LearningOnline Network with CAPA
# User Roles Screen
#
# $Id: lonroles.pm,v 1.132 2005/11/08 21:54:03 albertel 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/
#
###
package Apache::lonroles;
use strict;
use Apache::lonnet;
use Apache::lonuserstate();
use Apache::Constants qw(:common);
use Apache::File();
use Apache::lonmenu;
use Apache::loncommon;
use Apache::lonhtmlcommon;
use Apache::lonannounce;
use Apache::lonlocal;
use GDBM_File;
sub redirect_user {
my ($r,$title,$url,$msg,$launch_nav) = @_;
$msg = $title if (! defined($msg));
&Apache::loncommon::content_type($r,'text/html');
&Apache::loncommon::no_cache($r);
$r->send_http_header;
my $swinfo=&Apache::lonmenu::rawconfig();
my $navwindow;
if ($launch_nav eq 'on') {
$navwindow.=&Apache::lonnavmaps::launch_win('now',undef,undef,
($url eq '/adm/whatsnew'));
} else {
$navwindow.=&Apache::lonnavmaps::close();
}
my $bodytag=&Apache::loncommon::bodytag('Switching Role');
# Note to style police:
# This must only replace the spaces, nothing else, or it bombs elsewhere.
$url=~s/ /\%20/g;
$r->print(<<ENDREDIR);
<head><title>$title</title>
<meta HTTP-EQUIV="Refresh" CONTENT="1; url=$url">
</head>
<html>
$bodytag
<script type="text/javascript">
$swinfo
</script>
$navwindow
<h1>$msg</h1>
<a href="$url">Continue</a>
</body>
</html>
ENDREDIR
return;
}
sub handler {
my $r = shift;
my $now=time;
my $then=$env{'user.login.time'};
my $envkey;
my %dcroles = ();
my $numdc = &check_fordc(\%dcroles,$then);
# ================================================================== Roles Init
if ($env{'form.selectrole'}) {
if ($env{'request.course.id'}) {
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" => $env{'user.domain'});
# Check if user is a DC trying to enter a course and needs privs to be created
if ($numdc > 0) {
foreach my $envkey (keys %env) {
if ($envkey =~ m-^form\.cc\./(\w+)/(\w+)$-) {
if ($dcroles{$1}) {
my $cckey = 'user.role.cc./'.$1.'/'.$2;
&check_privs($cckey,$then,$now);
}
last;
}
}
}
foreach $envkey (keys %env) {
next if ($envkey!~/^user\.role\./);
my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
&role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
if ($env{'form.'.$trolecode}) {
if ($tstatus eq 'is') {
$where=~s/^\///;
my ($cdom,$cnum,$csec)=split(/\//,$where);
# store role if recent_role list being kept
if ($env{'environment.recentroles'}) {
&Apache::lonhtmlcommon::store_recent('roles',
$trolecode,' ');
}
# check for keyed access
if (($role eq 'st') &&
($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
# who is key authority?
my $authdom=$cdom;
my $authnum=$cnum;
if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
($authnum,$authdom)=
split(/\W/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
}
# check with key authority
unless (&Apache::lonnet::validate_access_key(
$env{'environment.key.'.$cdom.'_'.$cnum},
$authdom,$authnum)) {
# there is no valid key
if ($env{'form.newkey'}) {
# student attempts to register a new key
&Apache::loncommon::content_type($r,'text/html');
&Apache::loncommon::no_cache($r);
$r->send_http_header;
my $swinfo=&Apache::lonmenu::rawconfig();
my $bodytag=&Apache::loncommon::bodytag
('Verifying Access Key to Unlock this Course');
my $buttontext=&mt('Enter Course');
my $message=&mt('Successfully registered key');
my $assignresult=
&Apache::lonnet::assign_access_key(
$env{'form.newkey'},
$authdom,$authnum,
$cdom,$cnum,
$env{'user.domain'},
$env{'user.name'},
'Assigned from '.$ENV{'REMOTE_ADDR'}.' at '.localtime().' for '.
$trolecode);
unless ($assignresult eq 'ok') {
$assignresult=~s/^error\:\s*//;
$message=&mt($assignresult).
'<br /><a href="/adm/logout">'.
&mt('Logout').'</a>';
$buttontext=&mt('Re-Enter Key');
}
$r->print(<<ENDENTEREDKEY);
<head><title>Verifying Course Access Key</title>
</head>
<html>
$bodytag
<script>
$swinfo
</script>
<form method="post">
<input type="hidden" name="selectrole" value="1" />
<input type="hidden" name="$trolecode" value="1" />
<font size="+2">$message</font><br />
<input type="submit" value="$buttontext" />
</form>
</body></html>
ENDENTEREDKEY
return OK;
} else {
# print form to enter a new key
&Apache::loncommon::content_type($r,'text/html');
&Apache::loncommon::no_cache($r);
$r->send_http_header;
my $swinfo=&Apache::lonmenu::rawconfig();
my $bodytag=&Apache::loncommon::bodytag
('Enter Access Key to Unlock this Course');
$r->print(<<ENDENTERKEY);
<head><title>Entering Course Access Key</title>
</head>
<html>
$bodytag
<script>
$swinfo
</script>
<form method="post">
<input type="hidden" name="selectrole" value="1" />
<input type="hidden" name="$trolecode" value="1" />
<input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
<input type="submit" value="Enter key" />
</form>
</body></html>
ENDENTERKEY
return OK;
}
}
}
&Apache::lonnet::log($env{'user.domain'},
$env{'user.name'},
$env{'user.home'},
"Role ".$trolecode);
&Apache::lonnet::appenv(
'request.role' => $trolecode,
'request.role.domain' => $cdom,
'request.course.sec' => $csec);
my $tadv=0;
my $msg=&mt('Entering course ...');
if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
my ($furl,$ferr)=
&Apache::lonuserstate::readmap($cdom.'/'.$cnum);
if (($env{'form.orgurl'}) &&
($env{'form.orgurl'}!~/^\/adm\/flip/)) {
my $dest=$env{'form.orgurl'};
if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
&Apache::lonnet::appenv('request.role.adv'=>$tadv);
$r->internal_redirect($dest);
return OK;
} else {
unless ($env{'request.course.id'}) {
&Apache::lonnet::appenv(
"request.course.id" => $cdom.'_'.$cnum);
$furl='/adm/roles?tryagain=1';
$msg=
'<h1><font color="red">'.
&mt('Could not initialize course at this time.').
'</font></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
}
if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
&Apache::lonnet::appenv('request.role.adv'=>$tadv);
# Check to see if the user is a CC entering a course
# for the first time
my (undef, undef, $role, $courseid) = split(/\./, $envkey);
if (substr($courseid, 0, 1) eq '/') {
$courseid = substr($courseid, 1);
}
$courseid =~ s/\//_/;
if ($role eq 'cc' && $env{'course.' . $courseid .
'.course.helper.not.run'}) {
$furl = "/adm/helper/course.initialization.helper";
# Send the user to the course they selected
} elsif (($env{'request.course.fn'})
&& ($role eq 'cc' && ($env{'environment.course_init_display'} ne 'firstres'))) {
$msg = &mt('Entering course ....');
&redirect_user($r,&mt('New in course'),
'/adm/whatsnew',$msg,
$env{'environment.remotenavmap'});
return OK;
}
&redirect_user($r,&mt('Entering Course'),
$furl,$msg,
$env{'environment.remotenavmap'});
return OK;
}
}
#
# Send the user to the construction space they selected
if ($role =~ /^(au|ca|aa)$/) {
my $redirect_url = '/priv/';
if ($role eq 'au') {
$redirect_url.=$env{'user.name'};
} else {
$where =~ /\/(.*)$/;
$redirect_url .= $1;
}
$redirect_url .= '/';
&redirect_user($r,&mt('Entering Construction Space'),
$redirect_url);
return OK;
}
if ($role eq 'dc') {
my $redirect_url = '/adm/menu/';
&redirect_user($r,&mt('Loading Domain Coordinator Menu'),
$redirect_url);
return OK;
}
}
}
}
}
# =============================================================== No Roles Init
&Apache::loncommon::content_type($r,'text/html');
&Apache::loncommon::no_cache($r);
$r->send_http_header;
return OK if $r->header_only;
my $swinfo=&Apache::lonmenu::rawconfig();
my $bodytag=&Apache::loncommon::bodytag('User Roles');
my $helptag='<table><tr><td>'.&Apache::loncommon::help_open_menu('','General Intro','General_Intro','User Roles',1,undef,undef,undef,undef,,&mt("Click here for help")).'</td></td></tr></table>';
$r->print(<<ENDHEADER);
<html>
<head>
<title>LON-CAPA User Roles</title>
</head>
$bodytag
$helptag<br />
<script>
$swinfo
window.focus();
</script>
ENDHEADER
# ------------------------------------------ Get Error Message from Environment
my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
if ($env{'user.error.msg'}) {
$r->log_reason(
"$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
}
# ------------------------------------------------- Can this user re-init, etc?
my $advanced=$env{'user.adv'};
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
my $tryagain=$env{'form.tryagain'};
# -------------------------------------------------------- Generate Page Output
# --------------------------------------------------------------- Error Header?
if ($error) {
$r->print("<h1>LON-CAPA Access Control</h1>");
$r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>Access : ".
Apache::lonnet::plaintext($priv)."\n");
$r->print("Resource: ".&Apache::lonenc::check_encrypt($fn)."\n");
$r->print("Action : $msg\n</pre><hr />");
my $url=$fn;
my $last;
if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
&GDBM_READER(),0640)) {
$last=$hash{'last_known'};
untie(%hash);
}
if ($last) { $fn.='?symb='.&Apache::lonnet::escape($last); }
&Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
&Apache::lonenc::check_encrypt($fn));
} else {
if ($env{'user.error.msg'}) {
$r->print(
'<h3><font color="red">'.
&mt('You need to choose another user role or enter a specific course for this function').'</font></h3>');
}
}
# -------------------------------------------------------- Choice or no choice?
if ($nochoose) {
if ($advanced) {
$r->print("<h2>".&mt('Assigned User Roles')."</h2>\n");
} else {
$r->print("<h2>".&mt('Sorry ...')."</h2>\n".
&mt('This resource might be part of'));
if ($env{'request.course.id'}) {
$r->print(&mt(' another'));
} else {
$r->print(&mt(' a certain'));
}
$r->print(&mt(' course.').'</body></html>');
return OK;
}
} else {
if ($advanced) {
$r->print(&mt("Your home server is ").
$Apache::lonnet::hostname{&Apache::lonnet::homeserver
($env{'user.name'},$env{'user.domain'})}.
"<br />\n");
$r->print(&mt(
"Author and Co-Author roles are not available on servers other than their respective home servers."));
}
if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
$fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
}
$r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
$r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
$r->print('<input type="hidden" name="selectrole" value="1" />');
}
if ($env{'user.adv'}) {
$r->print(
'<br /><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
$r->print(' /></label><input type="submit" value="'.&mt('Display').'" />');
}
my (%roletext,%sortrole,%roleclass);
my $countactive=0;
my $inrole=0;
my $possiblerole='';
foreach $envkey (sort keys %env) {
my $button = 1;
my $switchserver='';
my $roletext;
my $sortkey;
if ($envkey=~/^user\.role\./) {
my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
&role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
next if (!defined($role) || $role eq '');
$tremark='';
$tpstart=' ';
$tpend=' ';
$tfont='#000000';
if ($tstart) {
$tpstart=&Apache::lonlocal::locallocaltime($tstart);
}
if ($tend) {
$tpend=&Apache::lonlocal::locallocaltime($tend);
}
if ($env{'request.role'} eq $trolecode) {
$tstatus='selected';
}
my $tbg;
if (($tstatus eq 'is') || ($tstatus eq 'selected') ||
($env{'form.showall'})) {
if ($tstatus eq 'is') {
$tbg='#77FF77';
$tfont='#003300';
$possiblerole=$trolecode;
$countactive++;
} elsif ($tstatus eq 'future') {
$tbg='#FFFF77';
$button=0;
} elsif ($tstatus eq 'will') {
$tbg='#FFAA77';
$tremark.=&mt('Active at next login. ');
} elsif ($tstatus eq 'expired') {
$tbg='#FF7777';
$tfont='#330000';
$button=0;
} elsif ($tstatus eq 'will_not') {
$tbg='#AAFF77';
$tremark.=&mt('Expired after logout. ');
} elsif ($tstatus eq 'selected') {
$tbg='#11CC55';
$tfont='#002200';
$inrole=1;
$countactive++;
$tremark.=&mt('Currently selected. ');
}
my $trole;
if ($role =~ /^cr\//) {
my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
if ($tremark) { $tremark.='<br />'; }
$tremark.=&mt('Defined by ').$rauthor.
&mt(' at ').$rdomain.'.';
$trole=$rrole;
} else {
$trole=Apache::lonnet::plaintext($role);
}
my $ttype;
my $twhere;
my ($tdom,$trest,$tsection)=
split(/\//,Apache::lonnet::declutter($where));
# First, Co-Authorship roles
if (($role eq 'ca') || ($role eq 'aa')) {
my $home = &Apache::lonnet::homeserver($trest,$tdom);
my $allowed=0;
my @ids=&Apache::lonnet::current_machine_ids();
foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
if (!$allowed) {
$button=0;
$switchserver='otherserver='.$home.'&role='.$trolecode;
}
#next if ($home eq 'no_host');
$home = $Apache::lonnet::hostname{$home};
$ttype='Construction Space';
$twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
': '.$tdom.'<br />'.
' '.&mt('Server').': '.$home;
$env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
$tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
$sortkey=$role."$trest:$tdom";
} elsif ($role eq 'au') {
# Authors
my $home = &Apache::lonnet::homeserver
($env{'user.name'},$env{'user.domain'});
my $allowed=0;
my @ids=&Apache::lonnet::current_machine_ids();
foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
if (!$allowed) {
$button=0;
$switchserver=&Apache::lonnet::escape('http://'.
$Apache::lonnet::hostname{$home}.
'/adm/login?domain='.$env{'user.domain'}.
'&username='.$env{'user.name'}.
'&firsturl=/priv/'.$env{'user.name'}.'/');
}
#next if ($home eq 'no_host');
$home = $Apache::lonnet::hostname{$home};
$ttype='Construction Space';
$twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
': '.$home;
$env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
$tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
$sortkey=$role;
} elsif ($trest) {
$ttype='Course';
my $tcourseid=$tdom.'_'.$trest;
if ($env{'course.'.$tcourseid.'.description'}) {
$twhere=$env{'course.'.$tcourseid.'.description'};
$sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
unless ($twhere eq &mt('Currently not available')) {
$twhere.=' <font size="-2">'.
&Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
'</font>';
}
} else {
my %newhash=&Apache::lonnet::coursedescription($tcourseid);
if (%newhash) {
$sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
"\0".$envkey;
$twhere=$newhash{'description'}.
' <font size="-2">'.
&Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom,$tfont).
'</font>';
} else {
$twhere=&mt('Currently not available');
$env{'course.'.$tcourseid.'.description'}=$twhere;
$sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
}
}
if ($tsection) {
$twhere.='<br />'.&mt('Section/Group').': '.$tsection;
}
if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
} elsif ($tdom) {
$ttype='Domain';
$twhere=$tdom;
$sortkey=$role.$twhere;
} else {
$ttype='System';
$twhere=&mt('system wide');
$sortkey=$role.$twhere;
}
$roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$ttype,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver);
$roletext{$envkey}=$roletext;
if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
$sortrole{$sortkey}=$envkey;
$roleclass{$envkey}=$ttype;
}
}
}
# No active roles
if ($countactive==0) {
if ($inrole) {
$r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
} else {
$r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
}
$r->print('</form></body></html>');
return OK;
# Is there only one choice?
} elsif (($countactive==1) && ($env{'request.role'} eq 'cm')) {
$r->print('<h3>'.&mt('Please stand by.').'</h3>'.
'<input type="hidden" name="'.$possiblerole.'" value="1" />');
$r->print("</form>\n");
$r->rflush();
$r->print('<script>document.forms.rolechoice.submit();</script>');
$r->print('</body></html>');
return OK;
}
# More than one possible role
# ----------------------------------------------------------------------- Table
unless (($advanced) || ($nochoose)) {
$r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
}
$r->print('<br /><table><tr>');
unless ($nochoose) { $r->print('<th> </th>'); }
$r->print('<th>'.&mt('User Role').'</th><th>'.&mt('Extent').
'</th><th>'.&mt('Start').'</th><th>'.&mt('End').'</th></tr>'."\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) { $doheaders++; }
}
if ($env{'environment.recentroles'}) {
my %recent_roles =
&Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
my $output='';
foreach (sort(keys(%recent_roles))) {
if (defined($roletext{'user.role.'.$_})) {
$output.=$roletext{'user.role.'.$_};
} elsif ($numdc > 0) {
unless ($_ =~/^error\:/) {
$output.=&display_cc_role('user.role.'.$_);
}
}
}
if ($output) {
$r->print("<tr><td align='center' colspan='5'><font face='arial'>".
&mt('Recent Roles')."</font></td>");
$r->print($output);
$r->print("</tr>");
$doheaders ++;
}
}
if ($numdc > 0) {
$r->print(&coursepick_jscript());
$r->print(&Apache::loncommon::coursebrowser_javascript());
}
foreach my $type ('Construction Space','Domain','Course','System') {
my $output;
foreach my $which (sort {uc($a) cmp uc($b)} (keys(%sortrole))) {
if ($roleclass{$sortrole{$which}} =~ /^\Q$type\E/) {
$output.=$roletext{$sortrole{$which}};
if ($sortrole{$which} =~ m-dc\./(\w+)/-) {
if ($dcroles{$1}) {
$output .= &allcourses_row($1);
}
}
}
}
if ($output) {
if ($doheaders > 0) {
$r->print("<tr>".
"<td align='center' colspan='5'><font face='arial'>".&mt($type)."</font></td></tr>");
}
$r->print($output);
}
}
my $tremark='';
my $tfont='#003300';
if ($env{'request.role'} eq 'cm') {
$r->print('<tr bgcolor="#11CC55">');
$tremark=&mt('Currently selected. ');
$tfont='#002200';
} else {
$r->print('<tr bgcolor="#77FF77">');
}
unless ($nochoose) {
if ($env{'request.role'} ne 'cm') {
$r->print('<td><input type=submit value="'.
&mt('Select').'" name="cm"></td>');
} else {
$r->print('<td> </td>');
}
}
$r->print('<td colspan="3"><font color="'.$tfont.'">'.&mt('No role specified').
'</font></td><td><font color="'.$tfont.'">'.$tremark.
' </font></td></tr>'."\n");
$r->print('</table>');
unless ($nochoose) {
$r->print("</form>\n");
}
# ------------------------------------------------------------ Privileges Info
if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
$r->print('<hr /><h2>Current Privileges</h2>');
foreach $envkey (sort keys %env) {
if ($envkey=~/^user\.priv\.$env{'request.role'}\./) {
my $where=$envkey;
$where=~s/^user\.priv\.$env{'request.role'}\.//;
my $ttype;
my $twhere;
my ($tdom,$trest,$tsec)=
split(/\//,Apache::lonnet::declutter($where));
if ($trest) {
if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
$ttype='Construction Space';
$twhere='User: '.$trest.', Domain: '.$tdom;
} else {
$ttype='Course';
$twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
if ($tsec) {
$twhere.=' (Section/Group: '.$tsec.')';
}
}
} elsif ($tdom) {
$ttype='Domain';
$twhere=$tdom;
} else {
$ttype='System';
$twhere='/';
}
$r->print("\n<h3>".$ttype.': '.$twhere.'</h3><ul>');
foreach (sort split(/:/,$env{$envkey})) {
if ($_) {
my ($prv,$restr)=split(/\&/,$_);
my $trestr='';
if ($restr ne 'F') {
my $i;
$trestr.=' (';
for ($i=0;$i<length($restr);$i++) {
$trestr.=
Apache::lonnet::plaintext(substr($restr,$i,1));
if ($i<length($restr)-1) { $trestr.=', '; }
}
$trestr.=')';
}
$r->print('<li>'.
Apache::lonnet::plaintext($prv).$trestr.
'</li>');
}
}
$r->print('</ul>');
}
}
}
$r->print(&Apache::lonnet::getannounce());
if ($advanced) {
$r->print('<p><small><i>This is LON-CAPA '.
$r->dir_config('lonVersion').'</i><br />'.
'<a href="/adm/logout">'.&mt('Logout').'</a></small></p>');
}
$r->print("</body></html>\n");
return OK;
}
sub role_status {
my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
my @pwhere = ();
if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
(undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
unless (!defined($$role) || $$role eq '') {
$$where=join('.',@pwhere);
$$trolecode=$$role.'.'.$$where;
($$tstart,$$tend)=split(/\./,$env{$rolekey});
$$tstatus='is';
if ($$tstart && $$tstart>$then) {
$$tstatus='future';
if ($$tstart<$now) { $$tstatus='will'; }
}
if ($$tend) {
if ($$tend<$then) {
$$tstatus='expired';
} elsif ($$tend<$now) {
$$tstatus='will_not';
}
}
}
}
}
sub build_roletext {
my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$tfont,$trole,$ttype,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver) = @_;
my $roletext='<tr bgcolor="'.$tbg.'">';
my $is_dc=($trolecode =~ m/^dc\./);
my $rowspan=($is_dc) ? ''
: ' rowspan="2" ';
unless ($nochoose) {
if (!$button) {
if ($switchserver) {
$roletext.='<td'.$rowspan.'><a href="/adm/switchserver?'.
$switchserver.'">'.&mt('Switch Server').'</a></td>';
} else {
$roletext.=('<td> </td>');
}
} elsif ($tstatus eq 'is') {
$roletext.=('<td'.$rowspan.'><input type=submit value="'.
&mt('Select').'" name="'.
$trolecode.'"></td>');
} elsif ($tryagain) {
$roletext.=
'<td'.$rowspan.'><input type=submit value="'.
&mt('Try Selecting Again').'" name="'.$trolecode.'"></td>';
} elsif ($advanced) {
$roletext.=
'<td'.$rowspan.'><input type=submit value="'.
&mt('Re-Initialize').'" name="'.$trolecode.'"></td>';
} else {
$roletext.='<td'.$rowspan.'> </td>';
}
}
$tremark.=&Apache::lonannounce::showday(time,1,
&Apache::lonannounce::readcalendar($tdom.'_'.$trest));
$roletext.='<td><font color="'.$tfont.'">'.$trole.
'</font></td><td><font color="'.$tfont.'">'.$twhere.
'</font></td><td><font color="'.$tfont.'">'.$tpstart.
'</font></td><td><font color="'.$tfont.'">'.$tpend.
'</font></td></tr>';
if (!$is_dc) {
$roletext.='<tr bgcolor="'.$tbg.'"><td colspan="4"><font color="'.$tfont.'">'.$tremark.
' </font></td></tr><tr><td colspan="5" height="3"></td></tr>'."\n";
}
return $roletext;
}
sub check_privs {
my ($cckey,$then,$now) = @_;
if ($env{$cckey}) {
my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend,$tfont);
&role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
&set_privileges($1,$2);
}
} else {
&set_privileges($1,$2);
}
}
sub check_fordc {
my ($dcroles,$then) = @_;
my $numdc = 0;
if ($env{'user.adv'}) {
foreach my $envkey (sort keys %env) {
if ($envkey=~/^user\.role\.dc\.\/(\w+)\/$/) {
my $dcdom = $1;
my $livedc = 1;
my ($tstart,$tend)=split(/\./,$env{$envkey});
if ($tstart && $tstart>$then) { $livedc = 0; }
if ($tend && $tend <$then) { $livedc = 0; }
if ($livedc) {
$$dcroles{$dcdom} = $envkey;
$numdc++;
}
}
}
}
return $numdc;
}
sub courselink {
my ($dcdom) = @_;
my $courseform=&Apache::loncommon::selectcourse_link
('rolechoice','dccourse_'.$dcdom,'dcdomain_'.$dcdom,'coursedesc_'.$dcdom,$dcdom);
my $hiddenitems = '<input type="hidden" name="dcdomain_'.$dcdom.'" value="'.$dcdom.'" />'.
'<input type="hidden" name="origdom_'.$dcdom.'" value="'.$dcdom.'" />'.
'<input type="hidden" name="dccourse_'.$dcdom.'" value="" />'.
'<input type="hidden" name="coursedesc_'.$dcdom.'" value="" />';
return $courseform.$hiddenitems;
}
sub coursepick_jscript {
my $verify_script = <<"END";
<script>
function verifyCoursePick(caller) {
var numbutton = getIndex(caller)
var pickedCourse = document.rolechoice.elements[numbutton+4].value
var pickedDomain = document.rolechoice.elements[numbutton+2].value
if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
if (pickedCourse != '') {
if (numbutton != -1) {
var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
document.rolechoice.elements[numbutton+1].name = courseTarget
document.rolechoice.submit()
}
}
else {
alert("Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.");
}
}
else {
alert("You can only use this screen to select courses in the current domain")
}
}
function getIndex(caller) {
for (var i=0;i<document.rolechoice.elements.length;i++) {
if (document.rolechoice.elements[i] == caller) {
return i;
}
}
return -1;
}
</script>
END
return $verify_script;
}
sub processpick {
my $dcdom = shift;
my $process_pick = <<"END";
<script>
function process_pick(dom) {
var numbutton = getIndex(dom)
var pickedCourse = opener.document.rolechoice.dccourse_$dcdom.value
var pickedDomain = opener.document.rolechoice.dcdomain_$dcdom.value
if (opener.document.rolechoice.dcdomain_$dcdom.value == opener.document.rolechoice.origdom_$dcdom.value) {
if (pickedCourse != '') {
if (numbutton != -1) {
var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
opener.document.rolechoice.elements[numbutton].name = courseTarget
opener.document.rolechoice.submit()
}
}
}
}
function getIndex(dom) {
var callername = 'ccpick_'+dom
for (var i=0;i<opener.document.rolechoice.elements.length;i++) {
var elemname = opener.document.rolechoice.elements[i].name
if (elemname == callername) {
return i;
}
}
return -1;
}
</script>
END
return $process_pick;
}
sub display_cc_role {
my $rolekey = shift;
my $roletext;
my $advanced = $env{'user.adv'};
my $tryagain = $env{'form.tryagain'};
unless ($rolekey =~/^error\:/) {
if ($rolekey =~ m-^user\.role.cc\./(\w+)/(\w+)$-) {
my $tcourseid = $1.'_'.$2;
my $trolecode = 'cc./'.$1.'/'.$2;
my $trole = Apache::lonnet::plaintext('cc');
my $twhere;
my $tbg='#77FF77';
my $tfont='#003300';
my %newhash=&Apache::lonnet::coursedescription($tcourseid);
if (%newhash) {
$twhere=$newhash{'description'}.
' <font size="-2">'.
&Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1,$tfont).
'</font>';
} else {
$twhere=&mt('Currently not available');
$env{'course.'.$tcourseid.'.description'}=$twhere;
}
$twhere.="<br />".&mt('Domain').":".$1;
$roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$tfont,$trole,&mt('Course'),$twhere,'','','',1,'');
}
}
return $roletext;
}
sub allcourses_row {
my $dcdom = shift;
my $ccrole = Apache::lonnet::plaintext('cc');
my $selectlink = &courselink($dcdom);
my $output = '<tr bgcolor="#77FF77">'.
'<input type="hidden" name="ccpick_'.$dcdom.'" />'.
'<input type="hidden" name="pick_'.$dcdom.'" value="1" />'.
'<td colspan="5">'.
'<font color="#002200">'.$ccrole.'</font>'.
' <b>'.$selectlink.'</b>'.
' from '.&mt('Domain').' '.$dcdom.
'<tr><td colspan="5" height="3"></td></tr>'."\n";
return $output;
}
sub recent_filename {
my $area=shift;
return 'nohist_recent_'.&Apache::lonnet::escape($area);
}
sub set_privileges {
my ($dcdom,$pickedcourse) = @_;
my $area = '/'.$dcdom.'/'.$pickedcourse;
my $role = 'cc';
my $spec = $role.'.'.$area;
my $userroles = &Apache::lonnet::set_arearole($role,$area,'','',$dcdom,$env{'user.name'});
my %ccrole = ();
&Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
my ($author,$adv)= &Apache::lonnet::set_userprivs(\$userroles,\%ccrole);
my @newprivs = split/\n/,$userroles;
my %newccroles = ();
foreach (@newprivs) {
my ($key,$val) = split/=/,$_;
$newccroles{$key} = $val;
}
&Apache::lonnet::appenv(%newccroles);
&Apache::lonnet::log($env{'user.domain'},
$env{'user.name'},
$env{'user.home'},
"Role ".$role);
&Apache::lonnet::appenv(
'request.role' => $role,
'request.role.domain' => $dcdom,
'request.course.sec' => '');
my $tadv=0;
if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
&Apache::lonnet::appenv('request.role.adv' => $tadv);
}
1;
__END__
=head1 NAME
Apache::lonroles - User Roles Screen
=head1 SYNOPSIS
Invoked by /etc/httpd/conf/srm.conf:
<Location /adm/roles>
PerlAccessHandler Apache::lonacc
SetHandler perl-script
PerlHandler Apache::lonroles
ErrorDocument 403 /adm/login
ErrorDocument 500 /adm/errorhandler
</Location>
=head1 OVERVIEW
=head2 Choosing Roles
C<lonroles> 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<lonnet>'s C<&allowed> function that a certain
action is not allowed, C<lonroles> 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<lonroles> can also be accessed via the
B<CRS> 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<lonnet>'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
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