# The LearningOnline Network with CAPA
# User Roles Screen
#
# $Id: lonroles.pm,v 1.231.4.12 2010/01/23 21:13:04 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
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
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 Apache::lonpageflip();
use Apache::lonnavdisplay();
use GDBM_File;
use LONCAPA qw(:DEFAULT :match);
use HTML::Entities;
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') {
$navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
($url =~ m-^/adm/whatsnew-));
} else {
$navwindow.=&Apache::lonnavmaps::close();
}
my $start_page = &Apache::loncommon::start_page('Switching Role',undef,
{'redirect' => [1,$url]});
my $end_page = &Apache::loncommon::end_page();
# Note to style police:
# This must only replace the spaces, nothing else, or it bombs elsewhere.
$url=~s/ /\%20/g;
$r->print(<<ENDREDIR);
$start_page
<script type="text/javascript">
// <![CDATA[
$swinfo
// ]]>
</script>
$navwindow
<p>$msg</p>
$end_page
ENDREDIR
return;
}
sub error_page {
my ($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').
'<script type="text/javascript">'.
'// <![CDATA['.
&Apache::lonmenu::rawconfig().
'// ]]>'.
'</script>'.
'<p class="LC_error">'.&mt('The following problems occurred:').
'<br />'.
$error.
'</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'.
&Apache::loncommon::end_page());
}
sub handler {
my $r = shift;
my $now=time;
my $then=$env{'user.login.time'};
my $refresh=$env{'user.refresh.time'};
if (!$refresh) {
$refresh = $then;
}
my $envkey;
my %dcroles = ();
my $numdc = &check_fordc(\%dcroles,$then);
&Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
# ================================================================== Roles Init
if ($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($refresh,$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" => $env{'user.domain'}});
# Check if user is a DC trying to enter a course or author space and needs privs to be created
if ($numdc > 0) {
foreach my $envkey (keys %env) {
# Is this an ad-hoc Coordinator role?
if (my ($ccrole,$domain,$coursenum) =
($envkey =~ m-^form\.(cc|co)\./($match_domain)/($match_courseid)$-)) {
if ($dcroles{$domain}) {
&Apache::lonnet::check_adhoc_privs($domain,$coursenum,
$then,$refresh,$now,$ccrole);
}
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') || ($server_status eq 'switchserver')) {
&Apache::lonnet::check_adhoc_privs($domain,$user,$then,
$refresh,$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;
}
}
}
foreach $envkey (keys %env) {
next if ($envkey!~/^user\.role\./);
my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
&Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
\$trolecode,\$tstatus,\$tstart,\$tend);
if ($env{'form.'.$trolecode}) {
if ($tstatus eq 'is') {
$where=~s/^\///;
my ($cdom,$cnum,$csec)=split(/\//,$where);
# check for course groups
my %coursegroups = &Apache::lonnet::get_active_groups(
$env{'user.domain'},$env{'user.name'},$cdom, $cnum);
my $cgrps = join(':',keys(%coursegroups));
# store role if recent_role list being kept
if ($env{'environment.recentroles'}) {
my %frozen_roles =
&Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
&Apache::lonhtmlcommon::store_recent('roles',
$trolecode,' ',$frozen_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,$authdom)=
split(/:/,$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 $start_page=&Apache::loncommon::start_page
('Verifying Access Key to Unlock this Course');
my $end_page=&Apache::loncommon::end_page();
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'},
$env{'user.name'},
&mt('Assigned from [_1] at [_2] for [_3]'
,$ENV{'REMOTE_ADDR'}
,&Apache::lonlocal::locallocaltime()
,$trolecode)
);
unless ($assignresult eq 'ok') {
$assignresult=~s/^error\:\s*//;
$message=&mt($assignresult).
'<br /><a href="/adm/logout">'.
&mt('Logout').'</a>';
$buttontext=&mt('Re-Enter Key');
}
$r->print(<<ENDENTEREDKEY);
$start_page
<script type="text/javascript">
// <![CDATA[
$swinfo
// ]]>
</script>
<form action="" method="post">
<input type="hidden" name="selectrole" value="1" />
<input type="hidden" name="$trolecode" value="1" />
<span class="LC_fontsize_large">$message</span><br />
<input type="submit" value="$buttontext" />
</form>
$end_page
ENDENTEREDKEY
return OK;
} else {
# print form to enter a new key
&Apache::loncommon::content_type($r,'text/html');
&Apache::loncommon::no_cache($r);
$r->send_http_header;
my $swinfo=&Apache::lonmenu::rawconfig();
my $start_page=&Apache::loncommon::start_page
('Enter Access Key to Unlock this Course');
my $end_page=&Apache::loncommon::end_page();
$r->print(<<ENDENTERKEY);
$start_page
<script type="text/javascript">
// <![CDATA[
$swinfo
// ]]>
</script>
<form action="" method="post">
<input type="hidden" name="selectrole" value="1" />
<input type="hidden" name="$trolecode" value="1" />
<input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
<input type="submit" value="Enter key" />
</form>
$end_page
ENDENTERKEY
return OK;
}
}
}
&Apache::lonnet::log($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,
'request.course.groups' => $cgrps});
my $tadv=0;
if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
my $msg;
my ($furl,$ferr)=
&Apache::lonuserstate::readmap($cdom.'/'.$cnum);
if (($env{'form.orgurl'}) &&
($env{'form.orgurl'}!~/^\/adm\/flip/)) {
my $dest=$env{'form.orgurl'};
if ($env{'form.symb'}) {
if ($dest =~ /\?/) {
$dest .= '&';
} else {
$dest .= '?'
}
$dest .= 'symb='.$env{'form.symb'};
}
if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
&Apache::lonnet::appenv({'request.role.adv'=>$tadv});
if (($ferr) && ($tadv)) {
&error_page($r,$ferr,$dest);
} else {
$r->internal_redirect($dest);
}
return OK;
} else {
if (!$env{'request.course.id'}) {
&Apache::lonnet::appenv(
{"request.course.id" => $cdom.'_'.$cnum});
$furl='/adm/roles?tryagain=1';
$msg='<p><span class="LC_error">'
.&mt('Could not initialize [_1] at this time.',
$env{'course.'.$cdom.'_'.$cnum.'.description'})
.'</span></p>'
.'<p>'.&mt('Please try again.').'</p>'
.'<p>'.$ferr.'</p>';
}
if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
&Apache::lonnet::appenv({'request.role.adv'=>$tadv});
if (($ferr) && ($tadv)) {
&error_page($r,$ferr,$furl);
} else {
# 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') || ($role eq 'co'))
&& ($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.id'}) {
if ($env{'form.destinationurl'}) {
my $dest = $env{'form.destinationurl'};
if ($env{'form.destsymb'} ne '') {
my $esc_symb = &HTML::Entities::encode($env{'form.destsymb'},'"<>&');
$dest .= '?symb='.$esc_symb;
}
&redirect_user($r,&mt('Entering [_1]',
$env{'course.'.$courseid.'.description'}),
$dest,$msg,
$env{'environment.remotenavmap'});
return OK;
}
if (&Apache::lonnet::allowed('whn',
$env{'request.course.id'})
|| &Apache::lonnet::allowed('whn',
$env{'request.course.id'}.'/'
.$env{'request.course.sec'})
) {
my $startpage = &courseloadpage($courseid);
unless ($startpage eq 'firstres') {
$msg = &mt('Entering [_1] ...',
$env{'course.'.$courseid.'.description'});
&redirect_user($r,&mt('New in course'),
'/adm/whatsnew?refpage=start',$msg,
$env{'environment.remotenavmap'});
return OK;
}
}
}
# Are we allowed to look at the first resource?
if ($furl !~ m|^/adm/|) {
# Guess not ...
$furl=&Apache::lonpageflip::first_accessible_resource();
}
$msg = &mt('Entering [_1] ...',
$env{'course.'.$courseid.'.description'});
&redirect_user($r,&mt('Entering [_1]',
$env{'course.'.$courseid.'.description'}),
$furl,$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'),
$redirect_url);
return OK;
}
if ($role eq 'sc') {
my $redirect_url = '/adm/grades?command=scantronupload';
&redirect_user($r,&mt('Loading Data Upload Page'),
$redirect_url);
return OK;
}
}
}
}
}
# =============================================================== No Roles Init
&Apache::loncommon::content_type($r,'text/html');
&Apache::loncommon::no_cache($r);
$r->send_http_header;
return OK if $r->header_only;
my $crumbtext = 'User Roles';
my $pagetitle = 'My Roles';
my $recent = &mt('Recent Roles');
my $show_course=&Apache::loncommon::show_course();
if ($show_course) {
$crumbtext = 'Courses';
$pagetitle = 'My Courses';
$recent = &mt('Recent Courses');
}
my $brcrum =[{href=>"/adm/roles",text=>$crumbtext}];
my $swinfo=&Apache::lonmenu::rawconfig();
my $start_page=&Apache::loncommon::start_page($pagetitle,undef,{bread_crumbs=>$brcrum});
my $standby=&mt('Role selected. Please stand by.');
$standby=~s/\n/\\n/g;
my $noscript='<span class="LC_error">'.&mt('Use of LON-CAPA requires Javascript to be enabled in your web browser.').'<br />'.&mt('As this is not the case, most functionality in the system will be unavailable.').'</span><br />';
$r->print(<<ENDHEADER);
$start_page
<br />
<noscript>
$noscript
</noscript>
<script type="text/javascript">
// <![CDATA[
$swinfo
window.focus();
active=true;
function enterrole (thisform,rolecode,buttonname) {
if (active) {
active=false;
document.title='$standby';
window.status='$standby';
thisform.newrole.value=rolecode;
thisform.submit();
} else {
alert('$standby');
}
}
// ]]>
</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'};
my $reinit=$env{'user.reinit'};
delete $env{'user.reinit'};
# -------------------------------------------------------- Generate Page Output
# --------------------------------------------------------------- Error Header?
if ($error) {
$r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
$r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
if ($priv ne '') {
$r->print(&mt('Access : ').&Apache::lonnet::plaintext($priv)."\n");
}
if ($fn ne '') {
$r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
}
if ($msg ne '') {
$r->print(&mt('Action : ').$msg."\n");
}
$r->print("</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) { $fn.='?symb='.&escape($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 ($env{'user.error.msg'}) {
if ($reinit) {
$r->print(
'<h3><span class="LC_error">'.
&mt('As your session file for the course or community has expired, you will need to re-select the course.').'</span></h3>');
} else {
$r->print(
'<h3><span class="LC_error">'.
&mt('You need to choose another user role or enter a specific course or community for this function.').
'</span></h3>');
}
}
}
# -------------------------------------------------------- Choice or no choice?
if ($nochoose) {
$r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
&mt('This action is currently not authorized.').'</span>'.
&Apache::loncommon::end_page());
return OK;
} else {
if (($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" />');
$r->print('<input type="hidden" name="newrole" value="" />');
}
my (%roletext,%sortrole,%roleclass,%futureroles,%timezones);
my ($countactive,$countfuture,$inrole,$possiblerole) =
&gather_roles($then,$refresh,$now,$reinit,$nochoose,\%roletext,\%sortrole,\%roleclass,
\%futureroles,\%timezones);
$refresh = $now;
&Apache::lonnet::appenv({'user.refresh.time' => $refresh});
if ($env{'user.adv'}) {
$r->print('<p><label><input type="checkbox" name="showall"');
if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
$r->print(' />'.&mt('Show all roles').'</label>'
.' <input type="submit" value="'.&mt('Update display').'" />'
.'</p>');
} else {
if ($countactive > 0) {
$r->print(&Apache::loncoursequeueadmin::queued_selfenrollment());
my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
$r->print(
'<p>'
.&mt('[_1]Visit the [_2]Course/Community Catalog[_3]'
.' to view all [_4] LON-CAPA courses and communities.'
,'<b>'
,'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
,'</a></b>',$domdesc)
.'<br />'
.&mt('If a course or community is [_1]not[_2] in your list of current courses and communities below,'
.' you may be able to enroll if self-enrollment is permitted.'
,'<b>','</b>')
.'</p>'
);
}
}
# No active roles
if ($countactive==0) {
if ($inrole) {
$r->print('<h2>'.&mt('Currently no additional roles, courses or communities').'</h2>');
} else {
$r->print('<h2>'.&mt('Currently no active roles, courses or communities').'</h2>');
}
&findcourse_advice($r);
&requestcourse_advice($r);
$r->print('</form>');
if ($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";
}
$r->print(&Apache::loncommon::start_data_table_row()
.'<td class="'.$tbg.'"> </td>'
.'<td colspan="3">'
.&mt('No role specified')
.'</td>'
.'<td>'.$tremark.' </td>'
.&Apache::loncommon::end_data_table_row()
);
$r->print(&Apache::loncommon::end_data_table());
}
$r->print(&Apache::loncommon::end_page());
return OK;
}
# ----------------------------------------------------------------------- Table
unless ((!&Apache::loncommon::show_course()) || ($nochoose) || ($countactive==1)) {
$r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
}
if ($env{'form.destinationurl'}) {
$r->print('<input type="hidden" name="destinationurl" value="'.
$env{'form.destinationurl'}.'" />');
if ($env{'form.destsymb'} ne '') {
$r->print('<input type="hidden" name="destsymb" value="'.
$env{'form.destsymb'}.'" />');
}
}
my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
if ($env{'environment.recentroles'}) {
my %recent_roles =
&Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
my $output='';
foreach (sort(keys(%recent_roles))) {
if (ref($roletext{'user.role.'.$_}) eq 'ARRAY') {
$output.= &Apache::loncommon::start_data_table_row().
$roletext{'user.role.'.$_}->[0].
&Apache::loncommon::end_data_table_row().
&Apache::loncommon::continue_data_table_row().
$roletext{'user.role.'.$_}->[1].
&Apache::loncommon::end_data_table_row();
if ($_ =~ m-dc\./($match_domain)/-
&& $dcroles{$1}) {
$output .= &adhoc_roles_row($1,'recent');
}
} elsif ($numdc > 0) {
unless ($_ =~/^error\:/) {
$output.=&display_cc_role('user.role.'.$_);
}
}
}
if ($output) {
$r->print(&Apache::loncommon::start_data_table_empty_row()
.'<td align="center" colspan="5">'
.$recent
.'</td>'
.&Apache::loncommon::end_data_table_empty_row()
);
$r->print($output);
$doheaders ++;
}
}
if ($numdc > 0) {
$r->print(&coursepick_jscript());
$r->print(&Apache::loncommon::coursebrowser_javascript().
&Apache::loncommon::authorbrowser_javascript());
}
&print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
if ($countactive > 1) {
my $tremark='';
my $tbg;
if ($env{'request.role'} eq 'cm') {
$tbg="LC_roles_selected";
$tremark=&mt('Currently selected.').' ';
} else {
$tbg="LC_roles_is";
}
$r->print(&Apache::loncommon::start_data_table_row());
unless ($nochoose) {
if ($env{'request.role'} ne 'cm') {
$r->print('<td class="'.$tbg.'"><input type="submit" value="'.
&mt('Select').'" name="cm" /></td>');
} else {
$r->print('<td class="'.$tbg.'"> </td>');
}
}
$r->print('<td colspan="3">'
.&mt('No role specified')
.'</td>'
.'<td>'.$tremark.' </td>'
.&Apache::loncommon::end_data_table_row()
);
}
$r->print(&Apache::loncommon::end_data_table());
unless ($nochoose) {
$r->print("</form>\n");
}
# ------------------------------------------------------------ Privileges Info
if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
$r->print('<hr /><h2>'.&mt('Current Privileges').'</h2>');
$r->print(&privileges_info());
}
$r->print(&Apache::lonnet::getannounce());
if ($advanced) {
my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
$r->print('<p><small><i>'
.&mt('This LON-CAPA server is version [_1]',$r->dir_config('lonVersion'))
.'</i><br />'
.'<a href="/adm/logout">'.&mt('Logout').'</a> '
.'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
.&mt('Course/Community Catalog')
.'</a></small></p>');
}
$r->print(&Apache::loncommon::end_page());
return OK;
}
sub gather_roles {
my ($then,$refresh,$now,$reinit,$nochoose,$roletext,$sortrole,$roleclass,$futureroles,$timezones) = @_;
my ($countactive,$countfuture,$inrole,$possiblerole) = (0,0,0,'');
my $advanced = $env{'user.adv'};
my $tryagain = $env{'form.tryagain'};
foreach my $envkey (sort(keys(%env))) {
my $button = 1;
my $switchserver='';
my ($role_text,$role_text_end,$sortkey);
if ($envkey=~/^user\.role\./) {
my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
&Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
\$trolecode,\$tstatus,\$tstart,\$tend);
next if (!defined($role) || $role eq '' || $role =~ /^gr/);
my $timezone = &role_timezone($where,$timezones);
$tremark='';
$tpstart=' ';
$tpend=' ';
if ($tstart) {
$tpstart=&Apache::lonlocal::locallocaltime($tstart,$timezone);
}
if ($tend) {
$tpend=&Apache::lonlocal::locallocaltime($tend,$timezone);
}
if ($env{'request.role'} eq $trolecode) {
$tstatus='selected';
}
my $tbg;
if (($tstatus eq 'is')
|| ($tstatus eq 'selected')
|| ($tstatus eq 'future')
|| ($env{'form.showall'})) {
if ($tstatus eq 'is') {
$tbg='LC_roles_is';
$possiblerole=$trolecode;
$countactive++;
} elsif ($tstatus eq 'future') {
$tbg='LC_roles_future';
$button=0;
$futureroles->{$trolecode} = $tstart.':'.$tend;
$countfuture ++;
} elsif ($tstatus eq 'expired') {
$tbg='LC_roles_expired';
$button=0;
} elsif ($tstatus eq 'will_not') {
$tbg='LC_roles_will_not';
$tremark.=&mt('Expired after logout.').' ';
} elsif ($tstatus eq 'selected') {
$tbg='LC_roles_selected';
$inrole=1;
$countactive++;
$tremark.=&mt('Currently selected.').' ';
}
my $trole;
if ($role =~ /^cr\//) {
my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
if ($tremark) { $tremark.='<br />'; }
$tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
}
$trole=Apache::lonnet::plaintext($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;
$switchserver='otherserver='.$home.'&role='.$trolecode;
}
#next if ($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) {
my $tcourseid=$tdom.'_'.$trest;
$ttype = &Apache::loncommon::course_type($tcourseid);
$trole = &Apache::lonnet::plaintext($role,$ttype,$tcourseid);
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')) {
$twhere.=' <span class="LC_fontsize_small">'.
&Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
'</span>';
}
} else {
my %newhash=&Apache::lonnet::coursedescription($tcourseid);
if (%newhash) {
$sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
"\0".$envkey;
$twhere=$newhash{'description'}.
' <span class="LC_fontsize_small">'.
&Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
'</span>';
$ttype = $newhash{'type'};
$trole = &Apache::lonnet::plaintext($role,$ttype,$tcourseid);
} else {
$twhere=&mt('Currently not available');
$env{'course.'.$tcourseid.'.description'}=$twhere;
$sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
$ttype = 'Unavailable';
}
}
if ($tsection) {
$twhere.='<br />'.&mt('Section').': '.$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.$twhere;
}
($role_text,$role_text_end) =
&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,
$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,
$tpend,$nochoose,$button,$switchserver,$reinit);
$roletext->{$envkey}=[$role_text,$role_text_end];
if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
$sortrole->{$sortkey}=$envkey;
$roleclass->{$envkey}=$ttype;
}
}
}
return ($countactive,$countfuture,$inrole,$possiblerole);
}
sub role_timezone {
my ($where,$timezones) = @_;
my $timezone;
if (ref($timezones) eq 'HASH') {
if ($where =~ m{^/($match_domain)/($match_courseid)}) {
my $cdom = $1;
my $cnum = $2;
if ($cdom && $cnum) {
if (!exists($timezones->{$cdom.'_'.$cnum})) {
my %timehash =
&Apache::lonnet::get('environment',['timezone'],$cdom,$cnum);
if ($timehash{'timezone'} eq '') {
if (!exists($timezones->{$cdom})) {
my %domdefaults =
&Apache::lonnet::get_domain_defaults($cdom);
if ($domdefaults{'timezone_def'} eq '') {
$timezones->{$cdom} = 'local';
} else {
$timezones->{$cdom} = $domdefaults{'timezone_def'};
}
}
$timezones->{$cdom.'_'.$cnum} = $timezones->{$cdom};
} else {
$timezones->{$cdom.'_'.$cnum} =
&Apache::lonlocal::gettimezone($timehash{'timezone'});
}
}
$timezone = $timezones->{$cdom.'_'.$cnum};
}
} else {
my ($tdom) = ($where =~ m{^/($match_domain)});
if ($tdom) {
if (!exists($timezones->{$tdom})) {
my %domdefaults = &Apache::lonnet::get_domain_defaults($tdom);
if ($domdefaults{'timezone_def'} eq '') {
$timezones->{$tdom} = 'local';
} else {
$timezones->{$tdom} = $domdefaults{'timezone_def'};
}
}
$timezone = $timezones->{$tdom};
}
}
if ($timezone eq 'local') {
$timezone = undef;
}
}
return $timezone;
}
sub roletable_headers {
my ($r,$roleclass,$sortrole,$nochoose) = @_;
my $doheaders;
if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
$r->print('<br />'
.&Apache::loncommon::start_data_table()
.&Apache::loncommon::start_data_table_header_row()
);
if (!$nochoose) { $r->print('<th> </th>'); }
$r->print('<th>'.&mt('User Role').'</th>'
.'<th>'.&mt('Extent').'</th>'
.'<th>'.&mt('Start').'</th>'
.'<th>'.&mt('End').'</th>'
.&Apache::loncommon::end_data_table_header_row()
);
$doheaders=-1;
my @roletypes = &roletypes();
foreach my $type (@roletypes) {
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++; }
}
}
return $doheaders;
}
sub roletypes {
my @types = ('Domain','Construction Space','Course','Community','Unavailable','System');
return @types;
}
sub print_rolerows {
my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
my @types = &roletypes();
foreach my $type (@types) {
my $output;
foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
if (ref($roletext) eq 'HASH') {
if (ref($roletext->{$sortrole->{$which}}) eq 'ARRAY') {
$output.= &Apache::loncommon::start_data_table_row().
$roletext->{$sortrole->{$which}}->[0].
&Apache::loncommon::end_data_table_row().
&Apache::loncommon::continue_data_table_row().
$roletext->{$sortrole->{$which}}->[1].
&Apache::loncommon::end_data_table_row();
}
if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
if (ref($dcroles) eq 'HASH') {
if ($dcroles->{$1}) {
$output .= &adhoc_roles_row($1,'');
}
}
}
}
}
}
if ($output) {
if ($doheaders > 0) {
$r->print(&Apache::loncommon::start_data_table_empty_row()
.'<td align="center" colspan="5">'
.&mt($type)
.'</td>'
.&Apache::loncommon::end_data_table_empty_row()
);
}
$r->print($output);
}
}
}
}
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).'
<ul>
<li>'.&mt('The course has yet to be created.').'</li>
<li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
<li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
<li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
<li>'.&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.').'</li>
</ul>');
} else {
$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.').'<br />');
}
$r->print('<h3>'.&mt('Self-Enrollment').'</h3>'.
'<p>'.&mt('The [_1]Course/Community Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created, as well as any communities in the domain.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
$r->print(&mt('You can search for courses and communities which permit self-enrollment, if you would like to enroll in one.').'</p>'.
&Apache::loncoursequeueadmin::queued_selfenrollment());
return;
}
sub requestcourse_advice {
my ($r) = @_;
my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
my (%can_request,%request_doms);
&Apache::lonnet::check_can_request($env{'user.domain'},\%can_request,\%request_doms);
if (keys(%request_doms) > 0) {
my ($types,$typename) = &Apache::loncommon::course_types();
if ((ref($types) eq 'ARRAY') && (ref($typename) eq 'HASH')) {
$r->print('<h3>'.&mt('Request creation of a course or community').'</h3>'.
'<p>'.&mt('You have rights to request the creation of courses and/or communities in the following domain(s):').'<ul>');
my (@reqdoms,@reqtypes);
foreach my $type (sort(keys(%request_doms))) {
push(@reqtypes,$type);
if (ref($request_doms{$type}) eq 'ARRAY') {
my $domstr = join(', ',map { &Apache::lonnet::domain($_) } sort(@{$request_doms{$type}}));
$r->print(
'<li>'
.&mt('[_1]'.$typename->{$type}.'[_2] in domain: [_3]',
'<i>',
'</i>',
'<b>'.$domstr.'</b>')
.'</li>'
);
foreach my $dom (@{$request_doms{$type}}) {
unless (grep(/^\Q$dom\E/,@reqdoms)) {
push(@reqdoms,$dom);
}
}
}
}
my @showtypes;
foreach my $type (@{$types}) {
if (grep(/^\Q$type\E$/,@reqtypes)) {
push(@showtypes,$type);
}
}
my $requrl = '/adm/requestcourse';
if (@reqdoms == 1) {
$requrl .= '?showdom='.$reqdoms[0];
}
if (@showtypes > 0) {
$requrl.=(($requrl=~/\?/)?'&':'?').'crstype='.$showtypes[0];
}
if (@reqdoms == 1 || @showtypes > 0) {
$requrl .= '&state=crstype&action=new';
}
$r->print('</ul>'.&mt('Use the [_1]request form[_2] to submit a request for creation of a new course or community.','<a href="'.$requrl.'">','</a>').'</p>');
}
}
return;
}
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.': '.$tsec.')';
}
}
} elsif ($tdom) {
$ttype='Domain';
$twhere=$tdom;
} else {
$ttype='System';
$twhere='/';
}
$output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
foreach my $priv (sort(split(/:/,$env{$envkey}))) {
next if (!$priv);
my ($prv,$restr)=split(/\&/,$priv);
my $trestr='';
if ($restr ne 'F') {
$trestr.=' ('.
join(', ',
map { &Apache::lonnet::plaintext($_) }
(split('',$restr))).') ';
}
$output .= "\n\t".
'<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
}
$output .= "\n".'</ul>';
}
return $output;
}
sub build_roletext {
my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
my ($roletext,$roletext_end);
my $is_dc=($trolecode =~ m/^dc\./);
my $rowspan=($is_dc) ? ''
: ' rowspan="2" ';
unless ($nochoose) {
my $buttonname=$trolecode;
$buttonname=~s/\W//g;
if (!$button) {
if ($switchserver) {
$roletext.='<td'.$rowspan.' class="'.$tbg.'">'
.'<a href="/adm/switchserver?'.$switchserver.'">'
.&mt('Switch Server')
.'</a></td>';
} else {
$roletext.=('<td'.$rowspan.' class="'.$tbg.'"> </td>');
}
} elsif ($tstatus eq 'is') {
$roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
'<input name="'.$buttonname.'" type="button" value="'.
&mt('Select').'" onclick="javascript:enterrole(this.form,\''.
$trolecode."','".$buttonname.'\');" /></td>';
} elsif ($tryagain) {
$roletext.=
'<td'.$rowspan.' class="'.$tbg.'">'.
'<input name="'.$buttonname.'" type="button" value="'.
&mt('Try Selecting Again').'" onclick="javascript:enterrole(this.form,\''.
$trolecode."','".$buttonname.'\');" /></td>';
} elsif ($advanced) {
$roletext.=
'<td'.$rowspan.' class="'.$tbg.'">'.
'<input name="'.$buttonname.'" type="button" value="'.
&mt('Re-Initialize').'" onclick="javascript:enterrole(this.form,\''.
$trolecode."','".$buttonname.'\');" /></td>';
} elsif ($reinit) {
$roletext.=
'<td'.$rowspan.' class="'.$tbg.'">'.
'<input name="'.$buttonname.'" type="button" value="'.
&mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
$trolecode."','".$buttonname.'\');" /></td>';
} else {
$roletext.=
'<td'.$rowspan.' class="'.$tbg.'">'.
'<input name="'.$buttonname.'" type="button" value="'.
&mt('Re-Select').'" onclick="javascript:enterrole(this.form,\''.
$trolecode."','".$buttonname.'\');" /></td>';
}
}
if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
$tremark.=&Apache::lonannounce::showday(time,1,
&Apache::lonannounce::readcalendar($tdom.'_'.$trest));
}
$roletext.='<td>'.$trole.'</td>'
.'<td>'.$twhere.'</td>'
.'<td>'.$tpstart.'</td>'
.'<td>'.$tpend.'</td>';
if (!$is_dc) {
$roletext_end = '<td colspan="4">'.
$tremark.' '.
'</td>';
}
return ($roletext,$roletext_end);
}
sub check_needs_switchserver {
my ($possiblerole) = @_;
my $needs_switchserver;
my ($role,$where) = split(/\./,$possiblerole,2);
my (undef,$tdom,$twho) = split(/\//,$where);
my ($server_status,$home);
if (($role eq 'ca') || ($role eq 'aa')) {
($server_status,$home) = &check_author_homeserver($twho,$tdom);
} else {
($server_status,$home) = &check_author_homeserver($env{'user.name'},
$env{'user.domain'});
}
if ($server_status eq 'switchserver') {
$needs_switchserver = 1;
}
return $needs_switchserver;
}
sub check_author_homeserver {
my ($uname,$udom)=@_;
if (($uname eq '') || ($udom eq '')) {
return ('fail','');
}
my $home = &Apache::lonnet::homeserver($uname,$udom);
if (&Apache::lonnet::host_domain($home) ne $udom) {
return ('fail',$home);
}
my @ids=&Apache::lonnet::current_machine_ids();
if (grep(/^\Q$home\E$/,@ids)) {
return ('ok',$home);
} else {
return ('switchserver',$home);
}
}
sub check_fordc {
my ($dcroles,$then) = @_;
my $numdc = 0;
if ($env{'user.adv'}) {
foreach my $envkey (sort keys %env) {
if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
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 $numdc;
}
sub adhoc_course_role {
my ($refresh,$then) = @_;
my ($cdom,$cnum,$crstype);
$cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
$cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
$crstype = &Apache::loncommon::course_type();
if (&check_forcc($cdom,$cnum,$refresh,$then,$crstype)) {
my $setprivs;
if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
$setprivs = 1;
} else {
my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
if (($start && ($start>$refresh || $start == -1)) ||
($end && $end<$then)) {
$setprivs = 1;
}
}
if ($setprivs) {
if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
my $role = $1;
my $custom_role = $2;
my $usec = $3;
if ($role eq 'cr') {
if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
$role .= $custom_role;
} else {
return;
}
}
my (%userroles,%newrole,%newgroups,%group_privs);
my %cgroups =
&Apache::lonnet::get_active_groups($env{'user.domain'},
$env{'user.name'},$cdom,$cnum);
foreach my $group (keys(%cgroups)) {
$group_privs{$group} =
$env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
}
$newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
my $area = '/'.$cdom.'/'.$cnum;
my $spec = $role.'.'.$area;
if ($usec ne '') {
$spec .= '/'.$usec;
$area .= '/'.$usec;
}
&Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
&Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
my $adhocstart = $refresh-1;
$userroles{'user.role.'.$spec} = $adhocstart.'.';
&Apache::lonnet::appenv(\%userroles,[$role,'cm']);
}
}
}
return;
}
sub check_forcc {
my ($cdom,$cnum,$refresh,$then,$crstype) = @_;
my ($is_cc,$ccrole);
if ($crstype eq 'Community') {
$ccrole = 'co';
} else {
$ccrole = 'cc';
}
if ($cdom ne '' && $cnum ne '') {
if (&Apache::lonnet::is_course($cdom,$cnum)) {
my $envkey = 'user.role.'.$ccrole.'./'.$cdom.'/'.$cnum;
if (defined($env{$envkey})) {
$is_cc = 1;
my ($tstart,$tend)=split(/\./,$env{$envkey});
if ($tstart && $tstart>$refresh) { $is_cc = 0; }
if ($tend && $tend <$then) { $is_cc = 0; }
}
}
}
return $is_cc;
}
sub courselink {
my ($dcdom,$rowtype) = @_;
my $courseform=&Apache::loncommon::selectcourse_link
('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
$dcdom,$dcdom,undef,'Course/Community');
my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
'<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
'<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
'<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
return $courseform.$hiddenitems;
}
sub coursepick_jscript {
my %lt = &Apache::lonlocal::texthash(
plsu => "Please use the 'Select Course/Community' link to open a separate pick course window where you may select the course or community you wish to enter.",
youc => 'You can only use this screen to select courses and communities in the current domain.',
);
my $verify_script = <<"END";
<script type="text/javascript">
// <![CDATA[
function verifyCoursePick(caller) {
var numbutton = getIndex(caller)
var pickedCourse = document.rolechoice.elements[numbutton+4].value
var pickedDomain = document.rolechoice.elements[numbutton+2].value
if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
if (pickedCourse != '') {
if (numbutton != -1) {
var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
document.rolechoice.elements[numbutton+1].name = courseTarget
document.rolechoice.submit()
}
}
else {
alert("$lt{'plsu'}");
}
}
else {
alert("$lt{'youc'}")
}
}
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 $verify_script;
}
sub coauthorlink {
my ($dcdom,$rowtype) = @_;
my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
return $coauthorform.$hiddenitems;
}
sub display_cc_role {
my $rolekey = shift;
my ($roletext,$roletext_end);
my $advanced = $env{'user.adv'};
my $tryagain = $env{'form.tryagain'};
unless ($rolekey =~/^error\:/) {
if ($rolekey =~ m-^user\.role.(cc|co)\./($match_domain)/($match_courseid)$-) {
my $ccrole = $1;
my $tcourseid = $2.'_'.$3;
my $trolecode = $1.'./'.$2.'/'.$3;
my $twhere;
my $ttype;
my $tbg='LC_roles_is';
my %newhash=&Apache::lonnet::coursedescription($tcourseid);
if (%newhash) {
$twhere=$newhash{'description'}.
' <span style="LC_fontsize_small">'.
&Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
'</span>';
$ttype = $newhash{'type'};
} else {
$twhere=&mt('Currently not available');
$env{'course.'.$tcourseid.'.description'}=$twhere;
}
my $trole = &Apache::lonnet::plaintext($ccrole,$ttype,$tcourseid);
$twhere.="<br />".&mt('Domain').":".$1;
($roletext,$roletext_end) = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
}
}
return ($roletext,$roletext_end);
}
sub adhoc_roles_row {
my ($dcdom,$rowtype) = @_;
my $output = &Apache::loncommon::continue_data_table_row()
.' <td colspan="5">'
.&mt('[_1]Ad hoc[_2] roles in domain [_3] --'
,'<span class="LC_cusr_emph">','</span>',$dcdom)
.' ';
my $selectcclink = &courselink($dcdom,$rowtype);
my $ccrole = &Apache::lonnet::plaintext('co',undef,undef,1);
my $carole = &Apache::lonnet::plaintext('ca');
my $selectcalink = &coauthorlink($dcdom,$rowtype);
$output.=$ccrole.': '.$selectcclink
.' | '.$carole.': '.$selectcalink
.&Apache::loncommon::end_data_table_row();
return $output;
}
sub recent_filename {
my $area=shift;
return 'nohist_recent_'.&escape($area);
}
sub courseloadpage {
my ($courseid) = @_;
my $startpage;
my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
[$courseid.':courseinit']);
my ($tmp) = %entry_settings;
unless ($tmp =~ /^error: 2 /) {
$startpage = $entry_settings{$courseid.':courseinit'};
}
if ($startpage eq '') {
if (exists($env{'environment.course_init_display'})) {
$startpage = $env{'environment.course_init_display'};
}
}
return $startpage;
}
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
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/icons/back.gif){kind=icon}
Return to lonroles.pm CVS log ![[TXT]](/icons/text.gif){kind=icon}
![[DIR]](/icons/dir.gif){kind=icon}
Up to [LON-CAPA] / loncom / auth