Annotation of loncom/auth/lonroles.pm, revision 1.212

1.1       harris41    1: # The LearningOnline Network with CAPA
                      2: # User Roles Screen
1.31      www         3: #
1.212   ! bisitz      4: # $Id: lonroles.pm,v 1.211 2008/12/04 08:53:04 tempelho Exp $
1.31      www         5: #
                      6: # Copyright Michigan State University Board of Trustees
                      7: #
                      8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
                      9: #
                     10: # LON-CAPA is free software; you can redistribute it and/or modify
                     11: # it under the terms of the GNU General Public License as published by
                     12: # the Free Software Foundation; either version 2 of the License, or
                     13: # (at your option) any later version.
                     14: #
                     15: # LON-CAPA is distributed in the hope that it will be useful,
                     16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
                     17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     18: # GNU General Public License for more details.
                     19: #
                     20: # You should have received a copy of the GNU General Public License
                     21: # along with LON-CAPA; if not, write to the Free Software
                     22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
                     23: #
                     24: # /home/httpd/html/adm/gpl.txt
                     25: #
                     26: # http://www.lon-capa.org/
                     27: #
1.32      harris41   28: ###
1.22      harris41   29: 
1.210     jms        30: =pod
                     31: 
                     32: =head1 NAME
                     33: 
                     34: Apache::lonroles - User Roles Screen
                     35: 
                     36: =head1 SYNOPSIS
                     37: 
                     38: Invoked by /etc/httpd/conf/srm.conf:
                     39: 
                     40:  <Location /adm/roles>
                     41:  PerlAccessHandler       Apache::lonacc
                     42:  SetHandler perl-script
                     43:  PerlHandler Apache::lonroles
                     44:  ErrorDocument     403 /adm/login
                     45:  ErrorDocument	  500 /adm/errorhandler
                     46:  </Location>
                     47: 
                     48: =head1 OVERVIEW
                     49: 
                     50: =head2 Choosing Roles
                     51: 
                     52: C<lonroles> is a handler that allows a user to switch roles in
                     53: mid-session. LON-CAPA attempts to work with "No Role Specified", the
                     54: default role that a user has before selecting a role, as widely as
                     55: possible, but certain handlers for example need specification which
                     56: course they should act on, etc. Both in this scenario, and when the
                     57: handler determines via C<lonnet>'s C<&allowed> function that a certain
                     58: action is not allowed, C<lonroles> is used as error handler. This
                     59: allows the user to select another role which may have permission to do
                     60: what they were trying to do. C<lonroles> can also be accessed via the
                     61: B<CRS> button in the Remote Control. 
                     62: 
                     63: =begin latex
                     64: 
                     65: \begin{figure}
                     66: \begin{center}
                     67: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
                     68:   \caption{\label{Sample_Roles_Screen}Sample Roles Screen} 
                     69: \end{center}
                     70: \end{figure}
                     71: 
                     72: =end latex
                     73: 
                     74: =head2 Role Initialization
                     75: 
                     76: 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.
                     77: 
                     78: =head1 INTRODUCTION
                     79: 
                     80: This module enables a user to select what role he wishes to
                     81: operate under (instructor, student, teaching assistant, course
                     82: coordinator, etc).  These roles are pre-established by the actions
                     83: of upper-level users.
                     84: 
                     85: This is part of the LearningOnline Network with CAPA project
                     86: described at http://www.lon-capa.org.
                     87: 
                     88: =head1 HANDLER SUBROUTINE
                     89: 
                     90: This routine is called by Apache and mod_perl.
                     91: 
                     92: =over 4
                     93: 
                     94: =item *
                     95: 
                     96: Roles Initialization (yes/no)
                     97: 
                     98: =item *
                     99: 
                    100: Get Error Message from Environment
                    101: 
                    102: =item *
                    103: 
                    104: Who is this?
                    105: 
                    106: =item *
                    107: 
                    108: Generate Page Output
                    109: 
                    110: =item *
                    111: 
                    112: Choice or no choice
                    113: 
                    114: =item *
                    115: 
                    116: Table
                    117: 
                    118: =item *
                    119: 
                    120: Privileges
                    121: 
                    122: =back
                    123: 
                    124: =cut
                    125: 
                    126: 
1.1       harris41  127: package Apache::lonroles;
                    128: 
                    129: use strict;
1.118     albertel  130: use Apache::lonnet;
1.7       www       131: use Apache::lonuserstate();
1.1       harris41  132: use Apache::Constants qw(:common);
1.2       www       133: use Apache::File();
1.26      www       134: use Apache::lonmenu;
1.29      albertel  135: use Apache::loncommon;
1.104     raeburn   136: use Apache::lonhtmlcommon;
1.57      www       137: use Apache::lonannounce;
1.72      www       138: use Apache::lonlocal;
1.151     www       139: use Apache::lonpageflip();
1.167     albertel  140: use Apache::lonnavdisplay();
1.120     albertel  141: use GDBM_File;
1.170     albertel  142: use LONCAPA qw(:DEFAULT :match);
1.201     raeburn   143: use HTML::Entities;
1.149     www       144:  
1.1       harris41  145: 
1.62      matthew   146: sub redirect_user {
1.95      albertel  147:     my ($r,$title,$url,$msg,$launch_nav) = @_;
1.62      matthew   148:     $msg = $title if (! defined($msg));
1.73      www       149:     &Apache::loncommon::content_type($r,'text/html');
1.62      matthew   150:     &Apache::loncommon::no_cache($r);
                    151:     $r->send_http_header;
                    152:     my $swinfo=&Apache::lonmenu::rawconfig();
1.96      albertel  153:     my $navwindow;
1.95      albertel  154:     if ($launch_nav eq 'on') {
1.166     albertel  155: 	$navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
                    156: 						       ($url =~ m-^/adm/whatsnew-));
1.96      albertel  157:     } else {
                    158: 	$navwindow.=&Apache::lonnavmaps::close();
1.95      albertel  159:     }
1.147     albertel  160:     my $start_page = &Apache::loncommon::start_page('Switching Role',undef,
                    161: 						    {'redirect' => [1,$url],});
                    162:     my $end_page   = &Apache::loncommon::end_page();
                    163: 
1.92      www       164: # Note to style police: 
                    165: # This must only replace the spaces, nothing else, or it bombs elsewhere.
                    166:     $url=~s/ /\%20/g;
1.93      albertel  167:     $r->print(<<ENDREDIR);
1.147     albertel  168: $start_page
1.96      albertel  169: <script type="text/javascript">
1.62      matthew   170: $swinfo
                    171: </script>
1.96      albertel  172: $navwindow
1.62      matthew   173: <h1>$msg</h1>
1.147     albertel  174: $end_page
1.62      matthew   175: ENDREDIR
                    176:     return;
                    177: }
                    178: 
1.150     www       179: sub error_page {
                    180:     my ($r,$error,$dest)=@_;
                    181:     &Apache::loncommon::content_type($r,'text/html');
                    182:     &Apache::loncommon::no_cache($r);
                    183:     $r->send_http_header;
                    184:     return OK if $r->header_only;
                    185:     $r->print(&Apache::loncommon::start_page('Problems during Course Initialization').
                    186: 	      '<script type="text/javascript">'.
                    187: 	      &Apache::lonmenu::rawconfig().'</script>'.
                    188: 	      '<p>'.&mt('The following problems occurred:').
                    189: 	      $error.
1.156     albertel  190: 	      '</p><br /><a href="'.$dest.'">'.&mt('Continue').'</a>'.
1.150     www       191: 	      &Apache::loncommon::end_page());
                    192: }
                    193: 
1.1       harris41  194: sub handler {
1.10      www       195: 
1.1       harris41  196:     my $r = shift;
                    197: 
1.6       www       198:     my $now=time;
1.118     albertel  199:     my $then=$env{'user.login.time'};
1.6       www       200:     my $envkey;
1.107     raeburn   201:     my %dcroles = ();
                    202:     my $numdc = &check_fordc(\%dcroles,$then);
1.148     albertel  203:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
1.10      www       204: 
1.6       www       205: # ================================================================== Roles Init
1.118     albertel  206:     if ($env{'form.selectrole'}) {
1.188     www       207: 
                    208:         my $locknum=&Apache::lonnet::get_locks();
                    209:         if ($locknum) { return 409; }
                    210: 
1.134     www       211:         if ($env{'form.newrole'}) {
                    212:             $env{'form.'.$env{'form.newrole'}}=1;
                    213: 	}
1.118     albertel  214: 	if ($env{'request.course.id'}) {
1.185     raeburn   215:             # Check if user is CC trying to select a course role
                    216:             if ($env{'form.switchrole'}) {
                    217:                 if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
                    218:                     &adhoc_course_role($then);
                    219:                 }
                    220:             }
1.118     albertel  221: 	    my %temp=('logout_'.$env{'request.course.id'} => time);
1.33      www       222: 	    &Apache::lonnet::put('email_status',\%temp);
1.118     albertel  223: 	    &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
1.100     albertel  224: 	}
1.186     raeburn   225: 	&Apache::lonnet::appenv({"request.course.id"   => '',
                    226: 			 	 "request.course.fn"   => '',
                    227: 				 "request.course.uri"  => '',
                    228: 				 "request.course.sec"  => '',
                    229: 				 "request.role"        => 'cm',
                    230:                                  "request.role.adv"    => $env{'user.adv'},
                    231: 				 "request.role.domain" => $env{'user.domain'}});
1.182     www       232: # Check if user is a DC trying to enter a course or author space and needs privs to be created
1.107     raeburn   233:         if ($numdc > 0) {
1.118     albertel  234:             foreach my $envkey (keys %env) {
1.182     www       235: # Is this an ad-hoc CC-role?
1.146     raeburn   236:                 if (my ($domain,$coursenum) =
1.171     albertel  237: 		    ($envkey =~ m-^form\.cc\./($match_domain)/($match_courseid)$-)) {
1.146     raeburn   238:                     if ($dcroles{$domain}) {
1.182     www       239:                         &check_privs($domain,$coursenum,$then,$now,'cc');
                    240:                     }
                    241:                     last;
                    242:                 }
1.193     raeburn   243: # Is this an ad-hoc CA-role?
1.183     www       244:                 if (my ($domain,$user) =
                    245: 		    ($envkey =~ m-^form\.ca\./($match_domain)/($match_username)$-)) {
1.206     raeburn   246:                     if (($domain eq $env{'user.domain'}) && ($user eq $env{'user.name'})) {
                    247:                         delete($env{$envkey});
                    248:                         $env{'form.au./'.$domain.'/'} = 1;
                    249:                         my ($server_status,$home) = &check_author_homeserver($user,$domain);
                    250:                         if ($server_status eq 'switchserver') {
                    251:                             my $trolecode = 'au./'.$domain.'/';
                    252:                             my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
                    253:                             $r->internal_redirect($switchserver);
                    254:                         }
                    255:                         last;
                    256:                     }
                    257:                     if (my ($castart,$caend) = ($env{'user.role.ca./'.$domain.'/'.$user} =~ /^(\d*)\.(\d*)$/)) {
                    258:                         if (((($castart) && ($castart < $now)) || !$castart) && 
                    259:                             ((!$caend) || (($caend) && ($caend > $now)))) {
                    260:                             my ($server_status,$home) = &check_author_homeserver($user,$domain);
                    261:                             if ($server_status eq 'switchserver') {
                    262:                                 my $trolecode = 'ca./'.$domain.'/'.$user;
                    263:                                 my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
                    264:                                 $r->internal_redirect($switchserver);
                    265:                             }
                    266:                             last;
                    267:                         }
                    268:                     }
                    269:                     # Check if author blocked ca-access
1.190     www       270:                     my %blocked=&Apache::lonnet::get('environment',['domcoord.author'],$domain,$user);
                    271:                     if ($blocked{'domcoord.author'} eq 'blocked') {
1.206     raeburn   272:                         delete($env{$envkey});
                    273:                         $env{'user.error.msg'}=':::1:User '.$user.' in domain '.$domain.' blocked domain coordinator access';
                    274:                         last;
1.190     www       275:                     }
1.193     raeburn   276:                     if ($dcroles{$domain}) {
                    277:                         my ($server_status,$home) = &check_author_homeserver($user,$domain);
                    278:                         if (($server_status eq 'ok') || ($server_status eq 'switchserver')) {
                    279:                             &check_privs($domain,$user,$then,$now,'ca');
                    280:                             if ($server_status eq 'switchserver') {
                    281:                                 my $trolecode = 'ca./'.$domain.'/'.$user; 
                    282:                                 my $switchserver = '/adm/switchserver?'
                    283:                                                   .'otherserver='.$home.'&role='.$trolecode;
                    284:                                 $r->internal_redirect($switchserver);
                    285:                             }
                    286:                         } else {
                    287:                             delete($env{$envkey});
                    288:                         }
1.183     www       289:                     } else {
                    290:                         delete($env{$envkey});
1.182     www       291:                     }
                    292:                     last;
                    293:                 }
1.107     raeburn   294:             }
                    295:         }
                    296: 
1.118     albertel  297:         foreach $envkey (keys %env) {
1.40      matthew   298:             next if ($envkey!~/^user\.role\./);
1.102     raeburn   299:             my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
                    300:             &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
1.118     albertel  301:             if ($env{'form.'.$trolecode}) {
1.55      albertel  302: 		if ($tstatus eq 'is') {
                    303: 		    $where=~s/^\///;
                    304: 		    my ($cdom,$cnum,$csec)=split(/\//,$where);
1.137     raeburn   305: # check for course groups
                    306:                     my %coursegroups = &Apache::lonnet::get_active_groups(
                    307:                           $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
                    308:                     my $cgrps = join(':',keys(%coursegroups));
                    309: 
1.111     albertel  310: # store role if recent_role list being kept
1.118     albertel  311:                     if ($env{'environment.recentroles'}) {
1.158     albertel  312:                         my %frozen_roles =
                    313:                            &Apache::lonhtmlcommon::get_recent_frozen('roles',$env{'environment.recentrolesn'});
1.111     albertel  314: 			&Apache::lonhtmlcommon::store_recent('roles',
1.158     albertel  315: 							     $trolecode,' ',$frozen_roles{$trolecode});
1.111     albertel  316:                     }
                    317: 
                    318: 
1.53      www       319: # check for keyed access
1.55      albertel  320: 		    if (($role eq 'st') && 
1.118     albertel  321:                        ($env{'course.'.$cdom.'_'.$cnum.'.keyaccess'} eq 'yes')) {
1.89      www       322: # who is key authority?
                    323: 			my $authdom=$cdom;
                    324: 			my $authnum=$cnum;
1.118     albertel  325: 			if ($env{'course.'.$cdom.'_'.$cnum.'.keyauth'}) {
1.89      www       326: 			    ($authnum,$authdom)=
1.172     albertel  327: 				split(/:/,$env{'course.'.$cdom.'_'.$cnum.'.keyauth'});
1.89      www       328: 			}
                    329: # check with key authority
                    330: 			unless (&Apache::lonnet::validate_access_key(
1.118     albertel  331: 				     $env{'environment.key.'.$cdom.'_'.$cnum},
1.89      www       332: 					     $authdom,$authnum)) {
1.53      www       333: # there is no valid key
1.118     albertel  334: 			     if ($env{'form.newkey'}) {
1.53      www       335: # student attempts to register a new key
1.89      www       336: 				 &Apache::loncommon::content_type($r,'text/html');
                    337: 				 &Apache::loncommon::no_cache($r);
                    338: 				 $r->send_http_header;
                    339: 				 my $swinfo=&Apache::lonmenu::rawconfig();
1.147     albertel  340: 				 my $start_page=&Apache::loncommon::start_page
1.89      www       341: 				    ('Verifying Access Key to Unlock this Course');
1.147     albertel  342: 				 my $end_page=&Apache::loncommon::end_page();
1.90      www       343: 				 my $buttontext=&mt('Enter Course');
                    344: 				 my $message=&mt('Successfully registered key');
                    345: 				 my $assignresult=
                    346: 				     &Apache::lonnet::assign_access_key(
1.118     albertel  347: 						     $env{'form.newkey'},
1.90      www       348: 						     $authdom,$authnum,
1.91      www       349: 						     $cdom,$cnum,
1.118     albertel  350:                                                      $env{'user.domain'},
                    351: 						     $env{'user.name'},
1.204     bisitz    352:                                                      &mt('Assigned from [_1] at [_2] for [_3]'
                    353:                                                         ,$ENV{'REMOTE_ADDR'}
                    354:                                                         ,&Apache::lonlocal::locallocaltime()
                    355:                                                         ,$trolecode)
                    356:                                                      );
1.90      www       357: 				 unless ($assignresult eq 'ok') {
                    358: 				     $assignresult=~s/^error\:\s*//;
                    359: 				     $message=&mt($assignresult).
                    360: 				     '<br /><a href="/adm/logout">'.
1.89      www       361: 				     &mt('Logout').'</a>';
1.90      www       362: 				     $buttontext=&mt('Re-Enter Key');
                    363: 				 }
1.89      www       364: 				 $r->print(<<ENDENTEREDKEY);
1.147     albertel  365: $start_page
1.179     raeburn   366: <script type="text/javascript">
1.89      www       367: $swinfo
                    368: </script>
                    369: <form method="post">
                    370: <input type="hidden" name="selectrole" value="1" />
                    371: <input type="hidden" name="$trolecode" value="1" />
1.211     tempelho  372: <span class="LC_fontsize_large">$message</span><br />
1.89      www       373: <input type="submit" value="$buttontext" />
                    374: </form>
1.147     albertel  375: $end_page
1.89      www       376: ENDENTEREDKEY
                    377:                                  return OK;
1.55      albertel  378: 			     } else {
1.53      www       379: # print form to enter a new key
1.73      www       380: 				 &Apache::loncommon::content_type($r,'text/html');
1.55      albertel  381: 				 &Apache::loncommon::no_cache($r);
                    382: 				 $r->send_http_header;
                    383: 				 my $swinfo=&Apache::lonmenu::rawconfig();
1.147     albertel  384: 				 my $start_page=&Apache::loncommon::start_page
1.55      albertel  385: 				    ('Enter Access Key to Unlock this Course');
1.147     albertel  386: 				 my $end_page=&Apache::loncommon::end_page();
1.55      albertel  387: 				 $r->print(<<ENDENTERKEY);
1.147     albertel  388: $start_page
1.179     raeburn   389: <script type="text/javascript">
1.53      www       390: $swinfo
                    391: </script>
                    392: <form method="post">
1.89      www       393: <input type="hidden" name="selectrole" value="1" />
                    394: <input type="hidden" name="$trolecode" value="1" />
1.118     albertel  395: <input type="text" size="20" name="newkey" value="$env{'form.newkey'}" />
1.53      www       396: <input type="submit" value="Enter key" />
                    397: </form>
1.147     albertel  398: $end_page
1.53      www       399: ENDENTERKEY
1.55      albertel  400: 				 return OK;
                    401: 			     }
                    402: 			 }
                    403: 		     }
1.118     albertel  404: 		    &Apache::lonnet::log($env{'user.domain'},
                    405: 					 $env{'user.name'},
                    406: 					 $env{'user.home'},
1.87      www       407: 					 "Role ".$trolecode);
1.101     albertel  408: 		    
1.56      www       409: 		    &Apache::lonnet::appenv(
1.186     raeburn   410: 					   {'request.role'        => $trolecode,
                    411: 					    'request.role.domain' => $cdom,
                    412: 					    'request.course.sec'  => $csec,
                    413:                                             'request.course.groups' => $cgrps});
1.101     albertel  414:                     my $tadv=0;
1.62      matthew   415: 
1.125     www       416: 		    if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
1.152     raeburn   417:                         my $msg;
1.55      albertel  418: 			my ($furl,$ferr)=
                    419: 			    &Apache::lonuserstate::readmap($cdom.'/'.$cnum);
1.118     albertel  420: 			if (($env{'form.orgurl'}) && 
                    421: 			    ($env{'form.orgurl'}!~/^\/adm\/flip/)) {
                    422: 			    my $dest=$env{'form.orgurl'};
1.117     albertel  423: 			    if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1.186     raeburn   424: 			    &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
1.150     www       425:                             if (($ferr) && ($tadv)) {
                    426: 				&error_page($r,$ferr,$dest);
                    427: 			    } else {
                    428: 				$r->internal_redirect($dest);
                    429: 			    }
1.55      albertel  430: 			    return OK;
                    431: 			} else {
1.155     albertel  432: 			    if (!$env{'request.course.id'}) {
1.55      albertel  433: 				&Apache::lonnet::appenv(
1.186     raeburn   434: 				      {"request.course.id"  => $cdom.'_'.$cnum});
1.61      www       435: 				$furl='/adm/roles?tryagain=1';
1.55      albertel  436: 				$msg=
1.157     albertel  437: 				    '<h1><span class="LC_error">'.
1.162     albertel  438: 				    &mt('Could not initialize [_1] at this time.',
                    439: 					$env{'course.'.$cdom.'_'.$cnum.'.description'}).
1.157     albertel  440: 				    '</span></h1><h3>'.&mt('Please try again.').'</h3>'.$ferr;
1.55      albertel  441: 			    }
1.117     albertel  442: 			    if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1.186     raeburn   443: 			    &Apache::lonnet::appenv({'request.role.adv'=>$tadv});
1.152     raeburn   444: 
1.150     www       445: 			    if (($ferr) && ($tadv)) {
                    446: 				&error_page($r,$ferr,$furl);
                    447: 			    } else {
                    448: 				# Check to see if the user is a CC entering a course 
                    449: 				# for the first time
                    450: 				my (undef, undef, $role, $courseid) = split(/\./, $envkey);
                    451: 				if (substr($courseid, 0, 1) eq '/') {
                    452: 				    $courseid = substr($courseid, 1);
                    453: 				}
                    454: 				$courseid =~ s/\//_/;
                    455: 				if ($role eq 'cc' && $env{'course.' . $courseid . 
                    456: 							      '.course.helper.not.run'}) {
                    457: 				    $furl = "/adm/helper/course.initialization.helper";
                    458: 				    # Send the user to the course they selected
                    459: 				} elsif ($env{'request.course.id'}) {
1.185     raeburn   460:                                     if ($env{'form.destinationurl'}) {
                    461:                                         my $dest = $env{'form.destinationurl'};
1.203     raeburn   462:                                         if ($env{'form.destsymb'} ne '') {
                    463:                                             my $esc_symb = &HTML::Entities::encode($env{'form.destsymb'},'"<>&');
                    464:                                             $dest .= '?symb='.$esc_symb;
                    465:                                         }
1.185     raeburn   466:                                         &redirect_user($r,&mt('Entering [_1]',
                    467:                                                       $env{'course.'.$courseid.'.description'}),
                    468:                                                $dest,$msg,
                    469:                                                $env{'environment.remotenavmap'});
                    470:                                         return OK;
                    471:                                     }
1.150     www       472: 				    if (&Apache::lonnet::allowed('whn',
                    473: 								 $env{'request.course.id'})
                    474: 					|| &Apache::lonnet::allowed('whn',
                    475: 								    $env{'request.course.id'}.'/'
                    476: 								    .$env{'request.course.sec'})
                    477: 					) {
                    478: 					my $startpage = &courseloadpage($courseid);
                    479: 					unless ($startpage eq 'firstres') {         
1.204     bisitz    480: 					    $msg = &mt('Entering [_1] ...',
1.162     albertel  481: 						       $env{'course.'.$courseid.'.description'});
1.150     www       482: 					    &redirect_user($r,&mt('New in course'),
                    483: 							   '/adm/whatsnew?refpage=start',$msg,
                    484: 							   $env{'environment.remotenavmap'});
                    485: 					    return OK;
                    486: 					}
                    487: 				    }
                    488: 				}
1.151     www       489: # Are we allowed to look at the first resource?
1.169     albertel  490: 				if ($furl !~ m|^/adm/|) {
1.151     www       491: # Guess not ...
                    492: 				    $furl=&Apache::lonpageflip::first_accessible_resource();
                    493: 				}
1.162     albertel  494:                                 $msg = &mt('Entering [_1] ...',
                    495: 					   $env{'course.'.$courseid.'.description'});
                    496: 				&redirect_user($r,&mt('Entering [_1]',
                    497: 						      $env{'course.'.$courseid.'.description'}),
1.150     www       498: 					       $furl,$msg,
                    499: 					       $env{'environment.remotenavmap'});
1.58      bowersj2  500: 			    }
1.124     albertel  501: 			    return OK;
1.55      albertel  502: 			}
                    503: 		    }
1.62      matthew   504:                     #
                    505:                     # Send the user to the construction space they selected
1.125     www       506:                     if ($role =~ /^(au|ca|aa)$/) {
1.62      matthew   507:                         my $redirect_url = '/priv/';
                    508:                         if ($role eq 'au') {
1.118     albertel  509:                             $redirect_url.=$env{'user.name'};
1.62      matthew   510:                         } else {
                    511:                             $where =~ /\/(.*)$/;
                    512:                             $redirect_url .= $1;
                    513:                         }
                    514:                         $redirect_url .= '/';
1.78      sakharuk  515:                         &redirect_user($r,&mt('Entering Construction Space'),
1.62      matthew   516:                                        $redirect_url);
                    517:                         return OK;
                    518:                     }
1.104     raeburn   519:                     if ($role eq 'dc') {
1.108     raeburn   520:                         my $redirect_url = '/adm/menu/';
                    521:                         &redirect_user($r,&mt('Loading Domain Coordinator Menu'),
1.104     raeburn   522:                                        $redirect_url);
1.108     raeburn   523:                         return OK;
1.104     raeburn   524:                     }
1.55      albertel  525: 		}
                    526:             }
1.6       www       527:         }
1.40      matthew   528:     }
1.44      www       529: 
1.10      www       530: 
1.6       www       531: # =============================================================== No Roles Init
1.10      www       532: 
1.73      www       533:     &Apache::loncommon::content_type($r,'text/html');
1.30      albertel  534:     &Apache::loncommon::no_cache($r);
1.10      www       535:     $r->send_http_header;
                    536:     return OK if $r->header_only;
                    537: 
1.52      www       538:     my $swinfo=&Apache::lonmenu::rawconfig();
1.147     albertel  539:     my $start_page=&Apache::loncommon::start_page('User Roles');
1.134     www       540:     my $standby=&mt('Role selected. Please stand by.');
1.135     albertel  541:     $standby=~s/\n/\\n/g;
1.184     raeburn   542:     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 />';
1.163     www       543: 
1.10      www       544:     $r->print(<<ENDHEADER);
1.147     albertel  545: $start_page
1.163     www       546: <br />
1.179     raeburn   547: <noscript>
                    548: $noscript
                    549: </noscript>
                    550: <script type="text/javascript">
1.26      www       551: $swinfo
                    552: window.focus();
1.134     www       553: 
                    554: active=true;
                    555: 
                    556: function enterrole (thisform,rolecode,buttonname) {
                    557:     if (active) {
                    558: 	active=false;
                    559:         document.title='$standby';
                    560:         window.status='$standby';
                    561: 	thisform.newrole.value=rolecode;
                    562: 	thisform.submit();
                    563:     } else {
                    564:        alert('$standby');
                    565:     }   
                    566: }
1.26      www       567: </script>
1.10      www       568: ENDHEADER
1.6       www       569: 
1.2       www       570: # ------------------------------------------ Get Error Message from Environment
                    571: 
1.118     albertel  572:     my ($fn,$priv,$nochoose,$error,$msg)=split(/:/,$env{'user.error.msg'});
                    573:     if ($env{'user.error.msg'}) {
1.55      albertel  574: 	$r->log_reason(
1.118     albertel  575:    "$msg for $env{'user.name'} domain $env{'user.domain'} access $priv",$fn);
1.12      www       576:     }
1.1       harris41  577: 
1.61      www       578: # ------------------------------------------------- Can this user re-init, etc?
1.6       www       579: 
1.118     albertel  580:     my $advanced=$env{'user.adv'};
1.61      www       581:     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['tryagain']);
1.118     albertel  582:     my $tryagain=$env{'form.tryagain'};
1.209     raeburn   583:     my $reinit=$env{'user.reinit'};
                    584:     delete $env{'user.reinit'};
1.6       www       585: 
1.2       www       586: # -------------------------------------------------------- Generate Page Output
1.6       www       587: # --------------------------------------------------------------- Error Header?
1.2       www       588:     if ($error) {
1.187     bisitz    589:         $r->print("<h1>".&mt('LON-CAPA Access Control')."</h1>");
1.174     albertel  590: 	$r->print("<!-- LONCAPAACCESSCONTROLERRORSCREEN --><hr /><pre>");
                    591: 	if ($priv ne '') {
1.187     bisitz    592:             $r->print(&mt('Access  : ').&Apache::lonnet::plaintext($priv)."\n");
1.174     albertel  593: 	}
                    594: 	if ($fn ne '') {
1.187     bisitz    595:             $r->print(&mt('Resource: ').&Apache::lonenc::check_encrypt($fn)."\n");
1.174     albertel  596: 	}
                    597: 	if ($msg ne '') {
1.187     bisitz    598:             $r->print(&mt('Action  : ').$msg."\n");
1.174     albertel  599: 	}
                    600: 	$r->print("</pre><hr />");
1.120     albertel  601: 	my $url=$fn;
                    602: 	my $last;
                    603: 	if (tie(my %hash,'GDBM_File',$env{'request.course.fn'}.'_symb.db',
                    604: 		&GDBM_READER(),0640)) {
                    605: 	    $last=$hash{'last_known'};
                    606: 	    untie(%hash);
                    607: 	}
1.149     www       608: 	if ($last) { $fn.='?symb='.&escape($last); }
1.120     albertel  609: 
                    610: 	&Apache::londocs::changewarning($r,undef,'You have modified your course recently, [_1] may fix this access problem.',
                    611: 					&Apache::lonenc::check_encrypt($fn));
1.2       www       612:     } else {
1.118     albertel  613:         if ($env{'user.error.msg'}) {
1.209     raeburn   614:             if ($reinit) {
                    615:                 $r->print(
                    616:  '<h3><span class="LC_error">'.
                    617:  &mt('As your session file for the course has expired, you will need to re-select the course.').'</span></h3>');
                    618:             } else {
                    619: 	        $r->print(
1.157     albertel  620:  '<h3><span class="LC_error">'.
                    621:  &mt('You need to choose another user role or enter a specific course for this function').'</span></h3>');
1.209     raeburn   622: 	    }
                    623:         }
1.2       www       624:     }
1.6       www       625: # -------------------------------------------------------- Choice or no choice?
1.2       www       626:     if ($nochoose) {
1.177     www       627: 	$r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
                    628: 		  &mt('This action is currently not authorized.').'</span>'.
1.150     www       629: 		  &Apache::loncommon::end_page());
                    630: 	return OK;
1.6       www       631:     } else {
1.18      www       632:         if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
                    633:     	    $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
1.6       www       634:         }
1.84      www       635:         $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
1.116     albertel  636:         $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
                    637:         $r->print('<input type="hidden" name="selectrole" value="1" />');
1.134     www       638:         $r->print('<input type="hidden" name="newrole" value="" />');
1.6       www       639:     }
1.75      albertel  640:     my (%roletext,%sortrole,%roleclass);
1.84      www       641:     my $countactive=0;
1.191     raeburn   642:     my $countfuture=0;
                    643:     my $countwill=0;
1.84      www       644:     my $inrole=0;
                    645:     my $possiblerole='';
1.191     raeburn   646:     my %futureroles;
                    647:     my %roles_nextlogin;
1.118     albertel  648:     foreach $envkey (sort keys %env) {
1.35      matthew   649:         my $button = 1;
1.49      www       650:         my $switchserver='';
1.75      albertel  651: 	my $roletext;
                    652: 	my $sortkey;
1.2       www       653:         if ($envkey=~/^user\.role\./) {
1.212   ! bisitz    654:             my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
1.102     raeburn   655:             &role_status($envkey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
1.136     raeburn   656:             next if (!defined($role) || $role eq '' || $role =~ /^gr/);
1.102     raeburn   657:             $tremark='';
                    658:             $tpstart='&nbsp;';
                    659:             $tpend='&nbsp;';
1.4       www       660:             if ($tstart) {
1.74      www       661:                 $tpstart=&Apache::lonlocal::locallocaltime($tstart);
1.4       www       662:             }
                    663:             if ($tend) {
1.74      www       664:                 $tpend=&Apache::lonlocal::locallocaltime($tend);
1.4       www       665:             }
1.118     albertel  666:             if ($env{'request.role'} eq $trolecode) {
1.6       www       667: 		$tstatus='selected';
                    668:             }
1.4       www       669:             my $tbg;
1.164     albertel  670:             if (($tstatus eq 'is') 
                    671: 		|| ($tstatus eq 'selected') 
                    672: 		|| ($tstatus eq 'will') 
                    673: 		|| ($tstatus eq 'future') 
                    674:                 || ($env{'form.showall'})) {
1.35      matthew   675:                 if ($tstatus eq 'is') {
1.212   ! bisitz    676:                     $tbg='LC_roles_is';
1.84      www       677: 		    $possiblerole=$trolecode;
                    678: 		    $countactive++;
1.35      matthew   679:                 } elsif ($tstatus eq 'future') {
1.212   ! bisitz    680:                     $tbg='LC_roles_future';
1.49      www       681:                     $button=0;
1.191     raeburn   682:                     $futureroles{$trolecode} = $tstart.':'.$tend;
                    683:                     $countfuture ++;
1.35      matthew   684:                 } elsif ($tstatus eq 'will') {
1.212   ! bisitz    685:                     $tbg='LC_roles_will';
1.204     bisitz    686:                     $tremark.=&mt('Active at next login.').' ';
1.191     raeburn   687:                     $roles_nextlogin{$trolecode} = $tstart.':'.$tend;
                    688:                     $countwill ++;
1.35      matthew   689:                 } elsif ($tstatus eq 'expired') {
1.212   ! bisitz    690:                     $tbg='LC_roles_expired';
1.49      www       691:                     $button=0;
1.35      matthew   692:                 } elsif ($tstatus eq 'will_not') {
1.212   ! bisitz    693:                     $tbg='LC_roles_will_not';
1.204     bisitz    694:                     $tremark.=&mt('Expired after logout.').' ';
1.35      matthew   695:                 } elsif ($tstatus eq 'selected') {
1.212   ! bisitz    696:                     $tbg='LC_roles_selected';
1.84      www       697: 		    $inrole=1;
1.86      albertel  698: 		    $countactive++;
1.204     bisitz    699:                     $tremark.=&mt('Currently selected.').' ';
1.35      matthew   700:                 }
                    701:                 my $trole;
                    702:                 if ($role =~ /^cr\//) {
                    703:                     my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
1.132     albertel  704: 		    if ($tremark) { $tremark.='<br />'; }
1.204     bisitz    705:                     $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
1.159     albertel  706: 		}
                    707: 		$trole=Apache::lonnet::plaintext($role);
1.35      matthew   708:                 my $ttype;
                    709:                 my $twhere;
                    710:                 my ($tdom,$trest,$tsection)=
                    711:                     split(/\//,Apache::lonnet::declutter($where));
                    712:                 # First, Co-Authorship roles
1.125     www       713:                 if (($role eq 'ca') || ($role eq 'aa')) {
1.39      stredwic  714:                     my $home = &Apache::lonnet::homeserver($trest,$tdom);
1.83      albertel  715: 		    my $allowed=0;
                    716: 		    my @ids=&Apache::lonnet::current_machine_ids();
                    717: 		    foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
                    718:                     if (!$allowed) {
1.49      www       719: 			$button=0;
1.130     albertel  720:                         $switchserver='otherserver='.$home.'&role='.$trolecode;
1.49      www       721:                     }
1.35      matthew   722:                     #next if ($home eq 'no_host');
1.176     albertel  723:                     $home = &Apache::lonnet::hostname($home);
1.78      sakharuk  724:                     $ttype='Construction Space';
1.72      www       725:                     $twhere=&mt('User').': '.$trest.'<br />'.&mt('Domain').
                    726: 			': '.$tdom.'<br />'.
                    727:                         ' '.&mt('Server').':&nbsp;'.$home;
1.118     albertel  728:                     $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
1.82      www       729: 		    $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$trest.'/');
1.75      albertel  730: 		    $sortkey=$role."$trest:$tdom";
1.35      matthew   731:                 } elsif ($role eq 'au') {
                    732:                     # Authors
                    733:                     my $home = &Apache::lonnet::homeserver
1.118     albertel  734:                         ($env{'user.name'},$env{'user.domain'});
1.83      albertel  735: 		    my $allowed=0;
                    736: 		    my @ids=&Apache::lonnet::current_machine_ids();
                    737: 		    foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
                    738:                     if (!$allowed) {
1.49      www       739: 			$button=0;
1.143     albertel  740:                         $switchserver='otherserver='.$home.'&role='.$trolecode;
1.49      www       741:                     }
1.35      matthew   742:                     #next if ($home eq 'no_host');
1.176     albertel  743:                     $home = &Apache::lonnet::hostname($home);
1.78      sakharuk  744:                     $ttype='Construction Space';
1.72      www       745:                     $twhere=&mt('Domain').': '.$tdom.'<br />'.&mt('Server').
                    746: 			':&nbsp;'.$home;
1.118     albertel  747:                     $env{'course.'.$tdom.'_'.$trest.'.description'}='ca';
                    748: 		    $tremark.=&Apache::lonhtmlcommon::authorbombs('/res/'.$tdom.'/'.$env{'user.name'}.'/');
1.75      albertel  749: 		    $sortkey=$role;
1.35      matthew   750:                 } elsif ($trest) {
                    751:                     my $tcourseid=$tdom.'_'.$trest;
1.153     raeburn   752:                     $ttype = &Apache::loncommon::course_type($tcourseid);
                    753:                     $trole = &Apache::lonnet::plaintext($role,$ttype);
1.118     albertel  754:                     if ($env{'course.'.$tcourseid.'.description'}) {
                    755:                         $twhere=$env{'course.'.$tcourseid.'.description'};
1.80      albertel  756: 			$sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1.72      www       757:                         unless ($twhere eq &mt('Currently not available')) {
1.211     tempelho  758: 			    $twhere.=' <span class="LC_fontsize_small">'.
1.212   ! bisitz    759:         &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1.211     tempelho  760:                                     '</span>';
1.55      albertel  761: 			}
1.8       www       762:                     } else {
1.105     raeburn   763:                         my %newhash=&Apache::lonnet::coursedescription($tcourseid);
1.35      matthew   764:                         if (%newhash) {
1.80      albertel  765: 			    $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
1.77      albertel  766: 				"\0".$envkey;
1.49      www       767:                             $twhere=$newhash{'description'}.
1.211     tempelho  768:                               ' <span class="LC_fontsize_small">'.
1.212   ! bisitz    769:         &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
1.211     tempelho  770:                               '</span>';
1.152     raeburn   771:                             $ttype = $newhash{'type'};
1.153     raeburn   772:                             $trole = &Apache::lonnet::plaintext($role,$ttype);
1.35      matthew   773:                         } else {
1.72      www       774:                             $twhere=&mt('Currently not available');
1.118     albertel  775:                             $env{'course.'.$tcourseid.'.description'}=$twhere;
1.80      albertel  776: 			    $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
1.152     raeburn   777:                             $ttype = 'Unavailable';
1.35      matthew   778:                         }
1.8       www       779:                     }
1.121     albertel  780:                     if ($tsection) {
1.175     albertel  781:                         $twhere.='<br />'.&mt('Section').': '.$tsection;
1.121     albertel  782: 		    }
1.72      www       783: 		    if ($role ne 'st') { $twhere.="<br />".&mt('Domain').":".$tdom; }
1.35      matthew   784:                 } elsif ($tdom) {
1.78      sakharuk  785:                     $ttype='Domain';
1.35      matthew   786:                     $twhere=$tdom;
1.75      albertel  787: 		    $sortkey=$role.$twhere;
1.35      matthew   788:                 } else {
1.78      sakharuk  789:                     $ttype='System';
1.72      www       790:                     $twhere=&mt('system wide');
1.75      albertel  791: 		    $sortkey=$role.$twhere;
1.13      www       792:                 }
1.212   ! bisitz    793:                 $roletext.=&build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit);
1.75      albertel  794: 		$roletext{$envkey}=$roletext;
                    795: 		if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
                    796: 		$sortrole{$sortkey}=$envkey;
                    797: 		$roleclass{$envkey}=$ttype;
1.55      albertel  798: 	    }
1.4       www       799:         }
1.75      albertel  800:     }
1.196     raeburn   801:     if ($env{'user.adv'}) {
                    802:         $r->print(
1.212   ! bisitz    803:               '<p><label>'.&mt('Show all roles').': <input type="checkbox" name="showall"');
1.196     raeburn   804:         if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
1.212   ! bisitz    805:         $r->print(' /></label><input type="submit" value="'.&mt('Display').'" /></p>');
1.196     raeburn   806:     } else {
                    807:         if ($countactive > 0) {
                    808:             my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1.201     raeburn   809:             my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&'); 
                    810:             $r->print('<p>'.&mt('[_1]Visit the [_2]Course Catalog[_3] to view all [_4] LON-CAPA courses.','<b>','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a></b>',$domdesc).'<br />'.&mt('If a course is [_1]not[_2] in your list of current courses below, you may be able to enroll if self-enrollment is permitted.','<b>','</b>').'</p>');
1.196     raeburn   811:         }
                    812:     }
                    813: 
1.84      www       814: # No active roles
                    815:     if ($countactive==0) {
                    816: 	if ($inrole) {
                    817: 	    $r->print('<h2>'.&mt('Currently no additional roles or courses').'</h2>');
                    818: 	} else {
                    819: 	    $r->print('<h2>'.&mt('Currently no active roles or courses').'</h2>');
                    820: 	}
1.191     raeburn   821:         &findcourse_advice($r);
                    822: 	$r->print('</form>');
                    823:         if ($countfuture) {
                    824:             $r->print(&mt('The following [quant,_1,role,roles] will become active in the future:',$countfuture));
                    825:             my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,
                    826:                                                $nochoose);
                    827:             &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,
                    828:                             \%roletext);
                    829:             my $tremark='';
1.212   ! bisitz    830:             my $tbg;
1.191     raeburn   831:             if ($env{'request.role'} eq 'cm') {
1.212   ! bisitz    832:                 $tbg="LC_roles_selected";
1.204     bisitz    833:                 $tremark=&mt('Currently selected.').' ';
1.191     raeburn   834:             } else {
1.212   ! bisitz    835:                 $tbg="LC_roles_is";
1.191     raeburn   836:             }
1.212   ! bisitz    837:             $r->print(&Apache::loncommon::start_data_table_row()
        !           838:                      .'<td class="'.$tbg.'">&nbsp;</td>'
        !           839:                      .'<td colspan="3">'
        !           840:                      .&mt('No role specified')
        !           841:                      .'</td>'
        !           842:                      .'<td>'.$tremark.'&nbsp;</td>'
        !           843:                      .&Apache::loncommon::end_data_table_row()
        !           844:             );
1.191     raeburn   845: 
1.212   ! bisitz    846:             $r->print(&Apache::loncommon::end_data_table());
1.191     raeburn   847:         }
                    848:         $r->print(&Apache::loncommon::end_page());
1.84      www       849: 	return OK;
                    850:     }
                    851: # ----------------------------------------------------------------------- Table
1.202     raeburn   852:     unless ((!&Apache::lonmenu::show_course()) || ($nochoose) || ($countactive==1)) {
1.173     albertel  853: 	$r->print("<h2>".&mt('Select a Course to Enter')."</h2>\n");
1.84      www       854:     }
1.191     raeburn   855:     my $doheaders = &roletable_headers($r,\%roleclass,\%sortrole,$nochoose);
1.118     albertel  856:     if ($env{'environment.recentroles'}) {
1.111     albertel  857:         my %recent_roles =
1.118     albertel  858:                &Apache::lonhtmlcommon::get_recent('roles',$env{'environment.recentrolesn'});
1.111     albertel  859: 	my $output='';
                    860: 	foreach (sort(keys(%recent_roles))) {
                    861: 	    if (defined($roletext{'user.role.'.$_})) {
                    862: 		$output.=$roletext{'user.role.'.$_};
1.170     albertel  863:                 if ($_ =~ m-dc\./($match_domain)/- 
                    864: 		    && $dcroles{$1}) {
1.192     raeburn   865: 		    $output .= &adhoc_roles_row($1,'recent');
1.133     albertel  866:                 }
1.113     raeburn   867: 	    } elsif ($numdc > 0) {
                    868:                 unless ($_ =~/^error\:/) {
                    869:                     $output.=&display_cc_role('user.role.'.$_);
                    870:                 }
                    871:             } 
1.111     albertel  872: 	}
                    873: 	if ($output) {
1.212   ! bisitz    874: 	    $r->print(&Apache::loncommon::start_data_table_empty_row()
        !           875:                      .'<td align="center" colspan="5">'
        !           876:                      .&mt('Recent Roles')
        !           877:                      .'</td>'
        !           878:                      .&Apache::loncommon::end_data_table_empty_row()
        !           879:             );
1.111     albertel  880: 	    $r->print($output);
1.114     raeburn   881:             $doheaders ++;
1.111     albertel  882: 	}
                    883:     }
                    884: 
1.104     raeburn   885:     if ($numdc > 0) {
1.112     raeburn   886:         $r->print(&coursepick_jscript());
1.193     raeburn   887:         $r->print(&Apache::loncommon::coursebrowser_javascript().
                    888:                   &Apache::loncommon::authorbrowser_javascript());
1.108     raeburn   889:     }
1.191     raeburn   890:     &print_rolerows($r,$doheaders,\%roleclass,\%sortrole,\%dcroles,\%roletext);
1.202     raeburn   891:     if ($countactive > 1) {
                    892:         my $tremark='';
1.212   ! bisitz    893:         my $tbg;
1.202     raeburn   894:         if ($env{'request.role'} eq 'cm') {
1.212   ! bisitz    895:             $tbg="LC_roles_selected";
1.204     bisitz    896:             $tremark=&mt('Currently selected.').' ';
1.202     raeburn   897:         } else {
1.212   ! bisitz    898:                 $tbg="LC_roles_is";
1.202     raeburn   899:         }
1.212   ! bisitz    900:         $r->print(&Apache::loncommon::start_data_table_row());
1.202     raeburn   901:         unless ($nochoose) {
                    902: 	    if ($env{'request.role'} ne 'cm') {
1.212   ! bisitz    903: 	        $r->print('<td class="'.$tbg.'"><input type="submit" value="'.
1.202     raeburn   904: 		          &mt('Select').'" name="cm" /></td>');
                    905: 	    } else {
1.212   ! bisitz    906: 	        $r->print('<td class="'.$tbg.'">&nbsp;</td>');
1.202     raeburn   907: 	    }
                    908:         }
1.212   ! bisitz    909:         $r->print('<td colspan="3">'
        !           910:                  .&mt('No role specified')
        !           911:                  .'</td>'
        !           912:                  .'<td>'.$tremark.'&nbsp;</td>'
        !           913:                  .&Apache::loncommon::end_data_table_row()
        !           914:         );
1.202     raeburn   915:     } 
1.212   ! bisitz    916:     $r->print(&Apache::loncommon::end_data_table());
1.4       www       917:     unless ($nochoose) {
                    918: 	$r->print("</form>\n");
                    919:     }
1.22      harris41  920: # ------------------------------------------------------------ Privileges Info
1.118     albertel  921:     if (($advanced) && (($env{'user.error.msg'}) || ($error))) {
1.212   ! bisitz    922: 	$r->print('<hr /><h2>'.&mt('Current Privileges').'</h2>');
1.175     albertel  923: 	$r->print(&privileges_info());
1.4       www       924:     }
1.66      www       925:     $r->print(&Apache::lonnet::getannounce());
1.65      www       926:     if ($advanced) {
1.201     raeburn   927:         my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1.195     bisitz    928: 	$r->print('<p><small><i>'
                    929:                  .&mt('This is LON-CAPA [_1]',$r->dir_config('lonVersion'))
                    930: 		 .'</i><br />'
1.197     raeburn   931: 		 .'<a href="/adm/logout">'.&mt('Logout').'</a>&nbsp;&nbsp;'
1.201     raeburn   932:                  .'<a href="/adm/coursecatalog?showdom='.$esc_dom.'">'
                    933:                  .&mt('Course Catalog')
1.197     raeburn   934:                  .'</small></p>');
1.65      www       935:     }
1.147     albertel  936:     $r->print(&Apache::loncommon::end_page());
1.1       harris41  937:     return OK;
1.102     raeburn   938: }
                    939: 
1.191     raeburn   940: sub roletable_headers {
                    941:     my ($r,$roleclass,$sortrole,$nochoose) = @_;
                    942:     my $doheaders;
                    943:     if ((ref($sortrole) eq 'HASH') && (ref($roleclass) eq 'HASH')) {
1.212   ! bisitz    944:         $r->print('<br />'
        !           945:                  .&Apache::loncommon::start_data_table()
        !           946:                  .&Apache::loncommon::start_data_table_header_row()
        !           947:         );
1.191     raeburn   948:         if (!$nochoose) { $r->print('<th>&nbsp;</th>'); }
1.212   ! bisitz    949:         $r->print('<th>'.&mt('User Role').'</th>'
        !           950:                  .'<th>'.&mt('Extent').'</th>'
        !           951:                  .'<th>'.&mt('Start').'</th>'
        !           952:                  .'<th>'.&mt('End').'</th>'
        !           953:                  .&Apache::loncommon::end_data_table_header_row()
        !           954:         );
1.191     raeburn   955:         $doheaders=-1;
                    956:         my @roletypes = &roletypes();
                    957:         foreach my $type (@roletypes) {
                    958:             my $haverole=0;
                    959:             foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
                    960:                 if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
                    961:                     $haverole=1;
                    962:                 }
                    963:             }
                    964:             if ($haverole) { $doheaders++; }
                    965:         }
                    966:     }
                    967:     return $doheaders;
                    968: }
                    969: 
                    970: sub roletypes {
                    971:     my @types = ('Domain','Construction Space','Course','Unavailable','System');
                    972:     return @types; 
                    973: }
                    974: 
                    975: sub print_rolerows {
                    976:     my ($r,$doheaders,$roleclass,$sortrole,$dcroles,$roletext) = @_;
                    977:     if ((ref($roleclass) eq 'HASH') && (ref($sortrole) eq 'HASH')) {
                    978:         my @types = &roletypes();
                    979:         foreach my $type (@types) {
                    980:             my $output;
                    981:             foreach my $which (sort {uc($a) cmp uc($b)} (keys(%{$sortrole}))) {
                    982:                 if ($roleclass->{$sortrole->{$which}} =~ /^\Q$type\E/) {
                    983:                     if (ref($roletext) eq 'HASH') {
                    984:                         $output.=$roletext->{$sortrole->{$which}};
                    985:                         if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
                    986:                             if (ref($dcroles) eq 'HASH') {
                    987:                                 if ($dcroles->{$1}) {
1.192     raeburn   988:                                     $output .= &adhoc_roles_row($1,'');
1.191     raeburn   989:                                 }
                    990:                             }
                    991:                         }
                    992:                     }
                    993:                 }
                    994:             }
                    995:             if ($output) {
                    996:                 if ($doheaders > 0) {
1.212   ! bisitz    997:                     $r->print(&Apache::loncommon::start_data_table_empty_row()
        !           998:                              .'<td align="center" colspan="5">'
        !           999:                              .&mt($type)
        !          1000:                              .'</td>'
        !          1001:                              .&Apache::loncommon::end_data_table_empty_row()
        !          1002:                     );
1.191     raeburn  1003:                 }
                   1004:                 $r->print($output);
                   1005:             }
                   1006:         }
                   1007:     }
                   1008: }
                   1009: 
                   1010: sub findcourse_advice {
                   1011:     my ($r) = @_;
                   1012:     my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
1.201     raeburn  1013:     my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
1.200     raeburn  1014:     if (&Apache::lonnet::auto_run(undef,$env{'user.domain'})) {
1.191     raeburn  1015:         $r->print(&mt('If you were expecting to see an active role listed for a particular course in the [_1] domain, it may be missing for one of the following reasons:',$domdesc).'
                   1016: <ul>
                   1017:  <li>'.&mt('The course has yet to be created.').'</li>
                   1018:  <li>'.&mt('Automatic enrollment of registered students has not been enabled for the course.').'</li>
                   1019:  <li>'.&mt('You are in a section of course for which automatic enrollment in the corresponding LON-CAPA course is not active.').'</li>
                   1020:  <li>'.&mt('The start date for automated enrollment has yet to be reached.').'</li>
                   1021:  <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>
                   1022:  </ul>');
                   1023:     } else {
                   1024:         $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 />');
                   1025:     }
1.201     raeburn  1026:     $r->print('<p>'.&mt('The [_1]Course Catalog[_2] provides information about all [_3] classes for which LON-CAPA courses have been created.','<a href="/adm/coursecatalog?showdom='.$esc_dom.'">','</a>',$domdesc).'<br />');
1.191     raeburn  1027:     $r->print(&mt('You can search the course catalog for courses which permit self-enrollment, if you would like to enroll in a course.').'</p>');
                   1028:     return;
                   1029: }
                   1030: 
1.175     albertel 1031: sub privileges_info {
                   1032:     my ($which) = @_;
                   1033:     my $output;
                   1034: 
                   1035:     $which ||= $env{'request.role'};
                   1036: 
                   1037:     foreach my $envkey (sort(keys(%env))) {
                   1038: 	next if ($envkey!~/^user\.priv\.\Q$which\E\.(.*)/);
                   1039: 
                   1040: 	my $where=$1;
                   1041: 	my $ttype;
                   1042: 	my $twhere;
                   1043: 	my (undef,$tdom,$trest,$tsec)=split(m{/},$where);
                   1044: 	if ($trest) {
                   1045: 	    if ($env{'course.'.$tdom.'_'.$trest.'.description'} eq 'ca') {
                   1046: 		$ttype='Construction Space';
                   1047: 		$twhere='User: '.$trest.', Domain: '.$tdom;
                   1048: 	    } else {
                   1049: 		$ttype= &Apache::loncommon::course_type($tdom.'_'.$trest);
                   1050: 		$twhere=$env{'course.'.$tdom.'_'.$trest.'.description'};
                   1051: 		if ($tsec) {
                   1052: 		    my $sec_type = 'Section';
                   1053: 		    if (exists($env{"user.role.gr.$where"})) {
                   1054: 			$sec_type = 'Group';
                   1055: 		    }
                   1056: 		    $twhere.=' ('.$sec_type.': '.$tsec.')';
                   1057: 		}
                   1058: 	    }
                   1059: 	} elsif ($tdom) {
                   1060: 	    $ttype='Domain';
                   1061: 	    $twhere=$tdom;
                   1062: 	} else {
                   1063: 	    $ttype='System';
                   1064: 	    $twhere='/';
                   1065: 	}
1.204     bisitz   1066: 	$output .= "\n<h3>".&mt($ttype).': '.$twhere.'</h3>'."\n<ul>";
1.175     albertel 1067: 	foreach my $priv (sort(split(/:/,$env{$envkey}))) {
                   1068: 	    next if (!$priv);
                   1069: 
                   1070: 	    my ($prv,$restr)=split(/\&/,$priv);
                   1071: 	    my $trestr='';
                   1072: 	    if ($restr ne 'F') {
                   1073: 		$trestr.=' ('.
                   1074: 		    join(', ',
                   1075: 			 map { &Apache::lonnet::plaintext($_) } 
                   1076: 			     (split('',$restr))).') ';
                   1077: 	    }
                   1078: 	    $output .= "\n\t".
                   1079: 		'<li>'.&Apache::lonnet::plaintext($prv).$trestr.'</li>';
                   1080: 	}
                   1081: 	$output .= "\n".'</ul>';
                   1082:     }
                   1083:     return $output;
                   1084: }
                   1085: 
1.102     raeburn  1086: sub role_status {
                   1087:     my ($rolekey,$then,$now,$role,$where,$trolecode,$tstatus,$tstart,$tend) = @_;
                   1088:     my @pwhere = ();
1.118     albertel 1089:     if (exists($env{$rolekey}) && $env{$rolekey} ne '') {
1.102     raeburn  1090:         (undef,undef,$$role,@pwhere)=split(/\./,$rolekey);
                   1091:         unless (!defined($$role) || $$role eq '') {
                   1092:             $$where=join('.',@pwhere);
                   1093:             $$trolecode=$$role.'.'.$$where;
1.118     albertel 1094:             ($$tstart,$$tend)=split(/\./,$env{$rolekey});
1.102     raeburn  1095:             $$tstatus='is';
1.105     raeburn  1096:             if ($$tstart && $$tstart>$then) {
                   1097: 		$$tstatus='future';
                   1098: 		if ($$tstart<$now) { $$tstatus='will'; }
1.102     raeburn  1099:             }
                   1100:             if ($$tend) {
                   1101:                 if ($$tend<$then) {
                   1102:                     $$tstatus='expired';
1.103     raeburn  1103:                 } elsif ($$tend<$now) {
1.104     raeburn  1104:                     $$tstatus='will_not';
1.102     raeburn  1105:                 }
                   1106:             }
                   1107:         }
                   1108:     }
                   1109: }
1.1       harris41 1110: 
1.110     raeburn  1111: sub build_roletext {
1.212   ! bisitz   1112:     my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
        !          1113:     my $roletext=&Apache::loncommon::start_data_table_row();
1.132     albertel 1114:     my $is_dc=($trolecode =~ m/^dc\./);
                   1115:     my $rowspan=($is_dc) ? ''
                   1116:                          : ' rowspan="2" ';
                   1117: 
1.110     raeburn  1118:     unless ($nochoose) {
1.134     www      1119:         my $buttonname=$trolecode;
                   1120:         $buttonname=~s/\W//g;
1.110     raeburn  1121:         if (!$button) {
                   1122:             if ($switchserver) {
1.212   ! bisitz   1123:                 $roletext.='<td'.$rowspan.' class="'.$tbg.'">'
        !          1124:                           .'<a href="/adm/switchserver?'.$switchserver.'">'
        !          1125:                           .&mt('Switch Server')
        !          1126:                           .'</a></td>';
1.110     raeburn  1127:             } else {
1.212   ! bisitz   1128:                 $roletext.=('<td'.$rowspan.' class="'.$tbg.'">&nbsp;</td>');
1.110     raeburn  1129:             }
                   1130:         } elsif ($tstatus eq 'is') {
1.212   ! bisitz   1131:             $roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
        !          1132:                         '<input name="'.$buttonname.'" type="button" value="'.
1.134     www      1133:                         &mt('Select').'" onClick="javascript:enterrole(this.form,\''.
1.192     raeburn  1134:                         $trolecode."','".$buttonname.'\');" /></td>';
1.110     raeburn  1135:         } elsif ($tryagain) {
                   1136:             $roletext.=
1.212   ! bisitz   1137:                 '<td'.$rowspan.' class="'.$tbg.'">'.
        !          1138:                 '<input name="'.$buttonname.'" type="button" value="'.
1.134     www      1139:                 &mt('Try Selecting Again').'" onClick="javascript:enterrole(this.form,\''.
1.192     raeburn  1140:                         $trolecode."','".$buttonname.'\');" /></td>';
1.110     raeburn  1141:         } elsif ($advanced) {
                   1142:             $roletext.=
1.212   ! bisitz   1143:                 '<td'.$rowspan.' class="'.$tbg.'">'.
        !          1144:                 '<input name="'.$buttonname.'" type="button" value="'.
1.134     www      1145:                 &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
1.192     raeburn  1146:                         $trolecode."','".$buttonname.'\');" /></td>';
1.209     raeburn  1147:         } elsif ($reinit) {
                   1148:             $roletext.= 
1.212   ! bisitz   1149:                 '<td'.$rowspan.' class="'.$tbg.'">'.
        !          1150:                 '<input name="'.$buttonname.'" type="button" value="'.
1.209     raeburn  1151:                 &mt('Re-Select').'" onClick="javascript:enterrole(this.form,\''.
                   1152:                         $trolecode."','".$buttonname.'\');" /></td>';
1.110     raeburn  1153:         } else {
1.209     raeburn  1154:             $roletext.=
1.212   ! bisitz   1155:                 '<td'.$rowspan.' class="'.$tbg.'">'.
        !          1156:                 '<input name="'.$buttonname.'" type="button" value="'.
1.209     raeburn  1157:                 &mt('Re-Initialize').'" onClick="javascript:enterrole(this.form,\''.
                   1158:                         $trolecode."','".$buttonname.'\');" /></td>';
1.110     raeburn  1159:         }
                   1160:     }
1.165     albertel 1161:     if ($trolecode !~ m/^(dc|ca|au|aa)\./) {
                   1162: 	$tremark.=&Apache::lonannounce::showday(time,1,
                   1163: 			 &Apache::lonannounce::readcalendar($tdom.'_'.$trest));
                   1164:     }
1.212   ! bisitz   1165:     $roletext.='<td>'.$trole.'</td>'
        !          1166:               .'<td>'.$twhere.'</td>'
        !          1167:               .'<td>'.$tpstart.'</td>'
        !          1168:               .'<td>'.$tpend.'</td>'
        !          1169:               .&Apache::loncommon::end_data_table_row();
1.132     albertel 1170:     if (!$is_dc) {
1.212   ! bisitz   1171:         $roletext.=&Apache::loncommon::continue_data_table_row()
        !          1172:                   .'<td colspan="4">'
        !          1173:                   .$tremark.'&nbsp;'
        !          1174:                   .'</td>'
        !          1175:                   .&Apache::loncommon::end_data_table_row();
1.132     albertel 1176:     }
1.110     raeburn  1177:     return $roletext;
                   1178: }
                   1179: 
1.202     raeburn  1180: sub check_needs_switchserver {
                   1181:     my ($possiblerole) = @_;
                   1182:     my $needs_switchserver;
                   1183:     my ($role,$where) = split(/\./,$possiblerole,2);
                   1184:     my (undef,$tdom,$twho) = split(/\//,$where);
                   1185:     my ($server_status,$home);
                   1186:     if (($role eq 'ca') || ($role eq 'aa')) {
                   1187:         ($server_status,$home) = &check_author_homeserver($twho,$tdom);
                   1188:     } else {
                   1189:         ($server_status,$home) = &check_author_homeserver($env{'user.name'},
                   1190:                                                           $env{'user.domain'});
                   1191:     }
                   1192:     if ($server_status eq 'switchserver') {
                   1193:         $needs_switchserver = 1;
                   1194:     }
                   1195:     return $needs_switchserver;
                   1196: }
                   1197: 
1.193     raeburn  1198: sub check_author_homeserver {
1.183     www      1199:     my ($uname,$udom)=@_;
1.193     raeburn  1200:     if (($uname eq '') || ($udom eq '')) {
                   1201:         return ('fail','');
                   1202:     }
1.183     www      1203:     my $home = &Apache::lonnet::homeserver($uname,$udom);
1.193     raeburn  1204:     if (&Apache::lonnet::host_domain($home) ne $udom) {
                   1205:         return ('fail',$home);
                   1206:     }
1.183     www      1207:     my @ids=&Apache::lonnet::current_machine_ids();
1.193     raeburn  1208:     if (grep(/^\Q$home\E$/,@ids)) {
                   1209:         return ('ok',$home);
                   1210:     } else {
                   1211:         return ('switchserver',$home);
1.183     www      1212:     }
                   1213: }
                   1214: 
1.110     raeburn  1215: sub check_privs {
1.182     www      1216:     my ($cdom,$cnum,$then,$now,$checkrole) = @_;
                   1217:     my $cckey = 'user.role.'.$checkrole.'./'.$cdom.'/'.$cnum; 
1.118     albertel 1218:     if ($env{$cckey}) {
1.212   ! bisitz   1219:         my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
1.110     raeburn  1220:         &role_status($cckey,$then,$now,\$role,\$where,\$trolecode,\$tstatus,\$tstart,\$tend);
                   1221:         unless (($tstatus eq 'is') || ($tstatus eq 'will_not')) {
1.182     www      1222:             &set_privileges($cdom,$cnum,$checkrole);
1.110     raeburn  1223:         }
                   1224:     } else {
1.182     www      1225:         &set_privileges($cdom,$cnum,$checkrole);
1.110     raeburn  1226:     }
                   1227: }
                   1228: 
1.104     raeburn  1229: sub check_fordc {
                   1230:     my ($dcroles,$then) = @_;
                   1231:     my $numdc = 0;
1.118     albertel 1232:     if ($env{'user.adv'}) {
                   1233:         foreach my $envkey (sort keys %env) {
1.170     albertel 1234:             if ($envkey=~/^user\.role\.dc\.\/($match_domain)\/$/) {
1.104     raeburn  1235:                 my $dcdom = $1;
                   1236:                 my $livedc = 1;
1.118     albertel 1237:                 my ($tstart,$tend)=split(/\./,$env{$envkey});
1.105     raeburn  1238:                 if ($tstart && $tstart>$then) { $livedc = 0; }
                   1239:                 if ($tend   && $tend  <$then) { $livedc = 0; }
1.104     raeburn  1240:                 if ($livedc) {
                   1241:                     $$dcroles{$dcdom} = $envkey;
1.105     raeburn  1242:                     $numdc++;
1.104     raeburn  1243:                 }
                   1244:             }
                   1245:         }
                   1246:     }
                   1247:     return $numdc;
                   1248: }
                   1249: 
1.185     raeburn  1250: sub adhoc_course_role {
                   1251:     my ($then) = @_; 
                   1252:     my ($cdom,$cnum);
1.201     raeburn  1253:     $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
                   1254:     $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
1.185     raeburn  1255:     if (&check_forcc($cdom,$cnum,$then)) {
                   1256:         my $setprivs;
1.198     raeburn  1257:         if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
1.185     raeburn  1258:             $setprivs = 1;
                   1259:         } else {
1.198     raeburn  1260:             my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
1.185     raeburn  1261:             if (($start && ($start>$then || $start == -1)) ||
                   1262:                 ($end && $end<$then)) {
                   1263:                 $setprivs = 1;
                   1264:             }
                   1265:         } 
                   1266:         if ($setprivs) {
1.198     raeburn  1267:             if ($env{'form.switchrole'} =~ m-^(in|ta|ep|ad|st|cr)([\w/]*)\./\Q$cdom\E/\Q$cnum\E/?(\w*)$-) {
1.185     raeburn  1268:                 my $role = $1;
                   1269:                 my $custom_role = $2;
                   1270:                 my $usec = $3;
                   1271:                 if ($role eq 'cr') {
1.199     raeburn  1272:                     if ($custom_role =~ m-^/$match_domain/$match_username/\w+$-) {
1.185     raeburn  1273:                         $role .= $custom_role;
                   1274:                     } else {
                   1275:                         return;
                   1276:                     }
                   1277:                 }
1.208     raeburn  1278:                 my (%userroles,%newrole,%newgroups,%group_privs);
                   1279:                 my %cgroups =
                   1280:                     &Apache::lonnet::get_active_groups($env{'user.domain'},
                   1281:                                             $env{'user.name'},$cdom,$cnum);
                   1282:                 foreach my $group (keys(%cgroups)) {
                   1283:                     $group_privs{$group} =
                   1284:                         $env{'user.priv.cc./'.$cdom.'/'.$cnum.'./'.$cdom.'/'.$cnum.'/'.$group};
                   1285:                 }
                   1286:                 $newgroups{'/'.$cdom.'/'.$cnum} = \%group_privs;
1.185     raeburn  1287:                 my $area = '/'.$cdom.'/'.$cnum;
                   1288:                 my $spec = $role.'.'.$area;
                   1289:                 if ($usec ne '') {
                   1290:                     $spec .= '/'.$usec;
                   1291:                     $area .= '/'.$usec;
                   1292:                 }
                   1293:                 &Apache::lonnet::standard_roleprivs(\%newrole,$role,$cdom,$spec,$cnum,$area);
1.208     raeburn  1294:                 &Apache::lonnet::set_userprivs(\%userroles,\%newrole,\%newgroups);
1.185     raeburn  1295:                 my $adhocstart = $then-1;
                   1296:                 $userroles{'user.role.'.$spec} = $adhocstart.'.';
1.186     raeburn  1297:                 &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1.185     raeburn  1298:             }
                   1299:         }
                   1300:     }
                   1301:     return;
                   1302: }
                   1303: 
                   1304: sub check_forcc {
                   1305:     my ($cdom,$cnum,$then) = @_;
                   1306:     my $is_cc;
                   1307:     if ($cdom ne '' && $cnum ne '') {
                   1308:         if (&Apache::lonnet::is_course($cdom,$cnum)) {
                   1309:             my $envkey = 'user.role.cc./'.$cdom.'/'.$cnum;
                   1310:             if (defined($env{$envkey})) {
                   1311:                 $is_cc = 1;
                   1312:                 my ($tstart,$tend)=split(/\./,$env{$envkey});
                   1313:                 if ($tstart && $tstart>$then) { $is_cc = 0; }
                   1314:                 if ($tend   && $tend  <$then) { $is_cc = 0; }
                   1315:             }
                   1316:         }
                   1317:     }
                   1318:     return $is_cc;
                   1319: }
                   1320: 
1.108     raeburn  1321: sub courselink {
1.193     raeburn  1322:     my ($dcdom,$rowtype) = @_;
1.109     raeburn  1323:     my $courseform=&Apache::loncommon::selectcourse_link
1.152     raeburn  1324:                    ('rolechoice','dccourse'.$rowtype.'_'.$dcdom,
                   1325:                     'dcdomain'.$rowtype.'_'.$dcdom,'coursedesc'.$rowtype.'_'.
1.173     albertel 1326:                     $dcdom,$dcdom,undef);
1.138     raeburn  1327:     my $hiddenitems = '<input type="hidden" name="dcdomain'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
                   1328:                       '<input type="hidden" name="origdom'.$rowtype.'_'.$dcdom.'" value="'.$dcdom.'" />'.
                   1329:                       '<input type="hidden" name="dccourse'.$rowtype.'_'.$dcdom.'" value="" />'.
                   1330:                       '<input type="hidden" name="coursedesc'.$rowtype.'_'.$dcdom.'" value="" />';
1.112     raeburn  1331:     return $courseform.$hiddenitems;
1.109     raeburn  1332: }
                   1333: 
                   1334: sub coursepick_jscript {
1.184     raeburn  1335:     my %lt = &Apache::lonlocal::texthash(
                   1336:                   plsu => "Please use the 'Select Course' link to open a separate pick course window where you may select the course you wish to enter.",
                   1337:                   youc => 'You can only use this screen to select courses in the current domain.',
                   1338:              );
1.104     raeburn  1339:     my $verify_script = <<"END";
1.179     raeburn  1340: <script type="text/javascript">
1.108     raeburn  1341: function verifyCoursePick(caller) {
                   1342:     var numbutton = getIndex(caller)
1.112     raeburn  1343:     var pickedCourse = document.rolechoice.elements[numbutton+4].value
                   1344:     var pickedDomain = document.rolechoice.elements[numbutton+2].value
                   1345:     if (document.rolechoice.elements[numbutton+2].value == document.rolechoice.elements[numbutton+3].value) {
1.104     raeburn  1346:         if (pickedCourse != '') {
1.108     raeburn  1347:             if (numbutton != -1) {
                   1348:                 var courseTarget = "cc./"+pickedDomain+"/"+pickedCourse
                   1349:                 document.rolechoice.elements[numbutton+1].name = courseTarget
                   1350:                 document.rolechoice.submit()
                   1351:             }
1.104     raeburn  1352:         }
                   1353:         else {
1.184     raeburn  1354:             alert("$lt{'plsu'}");
1.104     raeburn  1355:         }
                   1356:     }
                   1357:     else {
1.184     raeburn  1358:         alert("$lt{'youc'}")
1.104     raeburn  1359:     }
                   1360: }
1.109     raeburn  1361: function getIndex(caller) {
1.108     raeburn  1362:     for (var i=0;i<document.rolechoice.elements.length;i++) {
1.109     raeburn  1363:         if (document.rolechoice.elements[i] == caller) {
1.108     raeburn  1364:             return i;
                   1365:         }
                   1366:     }
                   1367:     return -1;
                   1368: }
1.104     raeburn  1369: </script>
                   1370: END
1.109     raeburn  1371:     return $verify_script;
1.104     raeburn  1372: }
                   1373: 
1.193     raeburn  1374: sub coauthorlink {
                   1375:     my ($dcdom,$rowtype) = @_;
                   1376:     my $coauthorform=&Apache::loncommon::selectauthor_link('rolechoice',$dcdom);
                   1377:     my $hiddenitems = '<input type="hidden" name="adhoccauname'.$rowtype.'_'.$dcdom.'" value="" />';
                   1378:     return $coauthorform.$hiddenitems;
                   1379: }
                   1380: 
1.113     raeburn  1381: sub display_cc_role {
                   1382:     my $rolekey = shift;
                   1383:     my $roletext;
1.118     albertel 1384:     my $advanced = $env{'user.adv'};
                   1385:     my $tryagain = $env{'form.tryagain'};
1.113     raeburn  1386:     unless ($rolekey =~/^error\:/) {
1.171     albertel 1387:         if ($rolekey =~ m-^user\.role.cc\./($match_domain)/($match_courseid)$-) {
1.113     raeburn  1388:             my $tcourseid = $1.'_'.$2;
                   1389:             my $trolecode = 'cc./'.$1.'/'.$2;
                   1390:             my $twhere;
1.152     raeburn  1391:             my $ttype;
1.212   ! bisitz   1392:             my $tbg='LC_roles_is';
1.113     raeburn  1393:             my %newhash=&Apache::lonnet::coursedescription($tcourseid);
                   1394:             if (%newhash) {
                   1395:                 $twhere=$newhash{'description'}.
1.211     tempelho 1396:                         ' <span style="LC_fontsize_small">'.
1.212   ! bisitz   1397:                         &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
1.211     tempelho 1398:                         '</span>';
1.153     raeburn  1399:                 $ttype = $newhash{'type'};
1.113     raeburn  1400:             } else {
                   1401:                 $twhere=&mt('Currently not available');
1.118     albertel 1402:                 $env{'course.'.$tcourseid.'.description'}=$twhere;
1.110     raeburn  1403:             }
1.153     raeburn  1404:             my $trole = &Apache::lonnet::plaintext('cc',$ttype);
1.113     raeburn  1405:             $twhere.="<br />".&mt('Domain').":".$1;
1.212   ! bisitz   1406:             $roletext = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
1.104     raeburn  1407:         }
                   1408:     }
1.152     raeburn  1409:     return ($roletext);
1.104     raeburn  1410: }
                   1411: 
1.192     raeburn  1412: sub adhoc_roles_row {
1.138     raeburn  1413:     my ($dcdom,$rowtype) = @_;
1.212   ! bisitz   1414:     my $output = &Apache::loncommon::continue_data_table_row()
        !          1415:                  .' <td colspan="5">'
        !          1416:                  .'<table><tr><td>'
        !          1417:                  .&mt('[_1]Ad hoc[_2] roles in domain [_3] --'
        !          1418:                      ,'<span class="LC_cusr_emph">','</span>',$dcdom)
        !          1419:                  .'</td>'
        !          1420:                  .'<td>';
1.193     raeburn  1421:     my $selectcclink = &courselink($dcdom,$rowtype);
1.173     albertel 1422:     my $ccrole = &Apache::lonnet::plaintext('cc');
1.182     www      1423:     my $carole = &Apache::lonnet::plaintext('ca');
1.193     raeburn  1424:     my $selectcalink = &coauthorlink($dcdom,$rowtype);
1.212   ! bisitz   1425:     $output.=&mt('[_1]: [_2]',$ccrole,$selectcclink)
        !          1426:             .'<br /></td>'
        !          1427:             .'<td>&nbsp;&nbsp;</td>'
        !          1428:             .'<td>'.&mt('[_1]: [_2]',$carole,$selectcalink).'<br /></td>'
        !          1429:             .'</tr></table>'
        !          1430:             .'</td>'
        !          1431:             .&Apache::loncommon::end_data_table_row();
1.108     raeburn  1432:     return $output;
                   1433: }
                   1434: 
1.104     raeburn  1435: sub recent_filename {
                   1436:     my $area=shift;
1.149     www      1437:     return 'nohist_recent_'.&escape($area);
1.104     raeburn  1438: }
                   1439: 
1.106     raeburn  1440: sub set_privileges {
1.182     www      1441: # role can be cc or ca
                   1442:     my ($dcdom,$pickedcourse,$role) = @_;
1.106     raeburn  1443:     my $area = '/'.$dcdom.'/'.$pickedcourse;
                   1444:     my $spec = $role.'.'.$area;
1.168     albertel 1445:     my %userroles = &Apache::lonnet::set_arearole($role,$area,'','',
                   1446: 						  $env{'user.domain'},
                   1447: 						  $env{'user.name'});
1.106     raeburn  1448:     my %ccrole = ();
                   1449:     &Apache::lonnet::standard_roleprivs(\%ccrole,$role,$dcdom,$spec,$pickedcourse,$area);
1.154     albertel 1450:     my ($author,$adv)= &Apache::lonnet::set_userprivs(\%userroles,\%ccrole);
1.186     raeburn  1451:     &Apache::lonnet::appenv(\%userroles,[$role,'cm']);
1.184     raeburn  1452: 
1.118     albertel 1453:     &Apache::lonnet::log($env{'user.domain'},
                   1454:                          $env{'user.name'},
                   1455:                          $env{'user.home'},
1.106     raeburn  1456:                         "Role ".$role);
                   1457:     &Apache::lonnet::appenv(
1.186     raeburn  1458:                           {'request.role'        => $spec,
1.106     raeburn  1459:                           'request.role.domain' => $dcdom,
1.186     raeburn  1460:                           'request.course.sec'  => ''});
1.106     raeburn  1461:     my $tadv=0;
                   1462:     if (&Apache::lonnet::allowed('adv') eq 'F') { $tadv=1; }
1.186     raeburn  1463:     &Apache::lonnet::appenv({'request.role.adv'    => $tadv});
1.106     raeburn  1464: }
                   1465: 
1.139     raeburn  1466: sub courseloadpage {
                   1467:     my ($courseid) = @_;
                   1468:     my $startpage;
1.144     albertel 1469:     my %entry_settings = &Apache::lonnet::get('nohist_whatsnew',
                   1470: 					      [$courseid.':courseinit']);
1.139     raeburn  1471:     my ($tmp) = %entry_settings;
1.144     albertel 1472:     unless ($tmp =~ /^error: 2 /) {
1.139     raeburn  1473:         $startpage = $entry_settings{$courseid.':courseinit'};
                   1474:     }
                   1475:     if ($startpage eq '') {
                   1476:         if (exists($env{'environment.course_init_display'})) {
                   1477:             $startpage = $env{'environment.course_init_display'};
                   1478:         }
                   1479:     }
                   1480:     return $startpage;
                   1481: }
                   1482: 
1.1       harris41 1483: 1;
                   1484: __END__
1.32      harris41 1485: 
                   1486: =head1 NAME
                   1487: 
                   1488: Apache::lonroles - User Roles Screen
                   1489: 
                   1490: =head1 SYNOPSIS
                   1491: 
                   1492: Invoked by /etc/httpd/conf/srm.conf:
                   1493: 
                   1494:  <Location /adm/roles>
                   1495:  PerlAccessHandler       Apache::lonacc
                   1496:  SetHandler perl-script
                   1497:  PerlHandler Apache::lonroles
                   1498:  ErrorDocument     403 /adm/login
                   1499:  ErrorDocument	  500 /adm/errorhandler
                   1500:  </Location>
1.64      bowersj2 1501: 
                   1502: =head1 OVERVIEW
                   1503: 
                   1504: =head2 Choosing Roles
                   1505: 
                   1506: C<lonroles> is a handler that allows a user to switch roles in
                   1507: mid-session. LON-CAPA attempts to work with "No Role Specified", the
                   1508: default role that a user has before selecting a role, as widely as
                   1509: possible, but certain handlers for example need specification which
                   1510: course they should act on, etc. Both in this scenario, and when the
                   1511: handler determines via C<lonnet>'s C<&allowed> function that a certain
                   1512: action is not allowed, C<lonroles> is used as error handler. This
                   1513: allows the user to select another role which may have permission to do
                   1514: what they were trying to do. C<lonroles> can also be accessed via the
                   1515: B<CRS> button in the Remote Control. 
                   1516: 
                   1517: =begin latex
                   1518: 
                   1519: \begin{figure}
                   1520: \begin{center}
                   1521: \includegraphics[width=0.45\paperwidth,keepaspectratio]{Sample_Roles_Screen}
                   1522:   \caption{\label{Sample_Roles_Screen}Sample Roles Screen} 
                   1523: \end{center}
                   1524: \end{figure}
                   1525: 
                   1526: =end latex
                   1527: 
                   1528: =head2 Role Initialization
                   1529: 
                   1530: 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.
1.32      harris41 1531: 
                   1532: =head1 INTRODUCTION
                   1533: 
                   1534: This module enables a user to select what role he wishes to
                   1535: operate under (instructor, student, teaching assistant, course
                   1536: coordinator, etc).  These roles are pre-established by the actions
                   1537: of upper-level users.
                   1538: 
                   1539: This is part of the LearningOnline Network with CAPA project
                   1540: described at http://www.lon-capa.org.
                   1541: 
                   1542: =head1 HANDLER SUBROUTINE
                   1543: 
                   1544: This routine is called by Apache and mod_perl.
                   1545: 
                   1546: =over 4
                   1547: 
                   1548: =item *
                   1549: 
                   1550: Roles Initialization (yes/no)
                   1551: 
                   1552: =item *
                   1553: 
                   1554: Get Error Message from Environment
                   1555: 
                   1556: =item *
                   1557: 
                   1558: Who is this?
                   1559: 
                   1560: =item *
                   1561: 
                   1562: Generate Page Output
                   1563: 
                   1564: =item *
                   1565: 
                   1566: Choice or no choice
                   1567: 
                   1568: =item *
                   1569: 
                   1570: Table
                   1571: 
                   1572: =item *
                   1573: 
                   1574: Privileges
                   1575: 
                   1576: =back
                   1577: 
                   1578: =cut

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