--- loncom/auth/lonroles.pm	2010/06/02 14:49:38	1.247
+++ loncom/auth/lonroles.pm	2012/02/08 00:22:15	1.256.2.6.2.1
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # User Roles Screen
 #
-# $Id: lonroles.pm,v 1.247 2010/06/02 14:49:38 raeburn Exp $
+# $Id: lonroles.pm,v 1.256.2.6.2.1 2012/02/08 00:22:15 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -141,14 +141,22 @@ use Apache::loncoursequeueadmin;
 use GDBM_File;
 use LONCAPA qw(:DEFAULT :match);
 use HTML::Entities;
- 
+
 
 sub redirect_user {
-    my ($r,$title,$url,$msg) = @_;
+    my ($r,$title,$url,$msg,$launch_nav) = @_;
     $msg = $title if (! defined($msg));
     &Apache::loncommon::content_type($r,'text/html');
     &Apache::loncommon::no_cache($r);
     $r->send_http_header;
+    my $swinfo=&Apache::lonmenu::rawconfig();
+    my $navwindow;
+    if ($launch_nav eq 'on') {
+        $navwindow.=&Apache::lonnavdisplay::launch_win('now',undef,undef,
+                                                       ($url =~ m-^/adm/whatsnew-));
+    } else {
+        $navwindow.=&Apache::lonnavmaps::close();
+    }
 
     # Breadcrumbs
     my $brcrum = [{'href' => $url,
@@ -163,6 +171,12 @@ sub redirect_user {
     $url=~s/ /\%20/g;
     $r->print(<<ENDREDIR);
 $start_page
+<script type="text/javascript">
+// <![CDATA[
+$swinfo
+// ]]>
+</script>
+$navwindow
 <p>$msg</p>
 $end_page
 ENDREDIR
@@ -203,13 +217,35 @@ sub handler {
     my $now=time;
     my $then=$env{'user.login.time'};
     my $refresh=$env{'user.refresh.time'};
+    my $update=$env{'user.update.time'};
     if (!$refresh) {
         $refresh = $then;
     }
+    if (!$update) {
+        $update = $then;
+    }
+
+# -------------------------------------------------------- Check for new roles
+    my $updateresult;
+    if ($env{'form.doupdate'}) {
+        my $show_course=&Apache::loncommon::show_course();
+        my $checkingtxt;
+        if ($show_course) {
+            $checkingtxt = &mt('Checking for new courses ...');
+        } else {
+            $checkingtxt = &mt('Checking for new roles ...');
+        }
+        $updateresult = '<span class="LC_info">'.$checkingtxt.'</span>';
+        $updateresult .= &update_session_roles();
+        &Apache::lonnet::appenv({'user.update.time'  => $now});
+        $update = $now;
+    }
+
     my $envkey;
     my %dcroles = ();
-    my $numdc = &check_fordc(\%dcroles,$then);
+    my $numdc = &check_fordc(\%dcroles,$update,$then);
     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'});
+    my $loncaparev = $Apache::lonnet::perlvar{'lonVersion'};
 
 # ================================================================== Roles Init
     if ($env{'form.selectrole'}) {
@@ -223,8 +259,17 @@ sub handler {
 	if ($env{'request.course.id'}) {
             # Check if user is CC trying to select a course role
             if ($env{'form.switchrole'}) {
-                if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
-                    &adhoc_course_role($refresh,$then);
+                my $switch_is_active;
+                if (defined($env{'user.role.'.$env{'form.switchrole'}})) {
+                    my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
+                    if (!$end || $end > $now) {
+                        if (!$start || $start < $update) {
+                            $switch_is_active = 1;
+                        }
+                    }
+                }
+                unless ($switch_is_active) {
+                    &adhoc_course_role($refresh,$update,$then);
                 }
             }
 	    my %temp=('logout_'.$env{'request.course.id'} => time);
@@ -246,7 +291,7 @@ sub handler {
 		    ($envkey =~ m-^form\.(cc|co)\./($match_domain)/($match_courseid)$-)) {
                     if ($dcroles{$domain}) {
                         &Apache::lonnet::check_adhoc_privs($domain,$coursenum,
-                                                           $then,$refresh,$now,$ccrole);
+                                                           $update,$refresh,$now,$ccrole);
                     }
                     last;
                 }
@@ -259,7 +304,7 @@ sub handler {
                         my ($server_status,$home) = &check_author_homeserver($user,$domain);
                         if ($server_status eq 'switchserver') {
                             my $trolecode = 'au./'.$domain.'/';
-                            my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
+                            my $switchserver = '/adm/switchserver?otherserver='.$home.'&amp;role='.$trolecode;
                             $r->internal_redirect($switchserver);
                         }
                         last;
@@ -270,7 +315,7 @@ sub handler {
                             my ($server_status,$home) = &check_author_homeserver($user,$domain);
                             if ($server_status eq 'switchserver') {
                                 my $trolecode = 'ca./'.$domain.'/'.$user;
-                                my $switchserver = '/adm/switchserver?otherserver='.$home.'&role='.$trolecode;
+                                my $switchserver = '/adm/switchserver?otherserver='.$home.'&amp;role='.$trolecode;
                                 $r->internal_redirect($switchserver);
                             }
                             last;
@@ -286,12 +331,12 @@ sub handler {
                     if ($dcroles{$domain}) {
                         my ($server_status,$home) = &check_author_homeserver($user,$domain);
                         if (($server_status eq 'ok') || ($server_status eq 'switchserver')) {
-                            &Apache::lonnet::check_adhoc_privs($domain,$user,$then,
+                            &Apache::lonnet::check_adhoc_privs($domain,$user,$update,
                                                                $refresh,$now,'ca');
                             if ($server_status eq 'switchserver') {
                                 my $trolecode = 'ca./'.$domain.'/'.$user; 
                                 my $switchserver = '/adm/switchserver?'
-                                                  .'otherserver='.$home.'&role='.$trolecode;
+                                                  .'otherserver='.$home.'&amp;role='.$trolecode;
                                 $r->internal_redirect($switchserver);
                             }
                         } else {
@@ -308,12 +353,48 @@ sub handler {
         foreach $envkey (keys %env) {
             next if ($envkey!~/^user\.role\./);
             my ($where,$trolecode,$role,$tstatus,$tend,$tstart);
-            &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
+            &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
                                          \$trolecode,\$tstatus,\$tstart,\$tend);
             if ($env{'form.'.$trolecode}) {
 		if ($tstatus eq 'is') {
 		    $where=~s/^\///;
 		    my ($cdom,$cnum,$csec)=split(/\//,$where);
+                    if (($cnum) && ($role ne 'ca') && ($role ne 'aa')) {
+                        my $home = $env{'course.'.$cdom.'_'.$cnum.'.home'};
+                        my @ids = &Apache::lonnet::current_machine_ids();
+                        unless ($loncaparev eq '' && $home && grep(/^\Q$home\E$/,@ids)) {
+                            my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
+                            if ($curr_reqd_hash{'internal.releaserequired'} ne '') {
+                                my ($switchserver,$switchwarning) =
+                                    &check_release_required($loncaparev,$cdom.'_'.$cnum,$trolecode,$curr_reqd_hash{'internal.releaserequired'});
+                                if ($switchwarning ne '' || $switchserver ne '') {
+                                    &Apache::loncommon::content_type($r,'text/html');
+                                    &Apache::loncommon::no_cache($r);
+                                    $r->send_http_header;
+                                    my $end_page=&Apache::loncommon::end_page();
+                                    $r->print(&Apache::loncommon::start_page('Selected course unavailable on this server').
+                                              '<p class="LC_warning">');
+                                    if ($switchwarning) {
+                                        $r->print($switchwarning.'<br /><a href="/adm/roles">');
+                                        if (&Apache::loncommon::show_course()) {
+                                            $r->print(&mt('Display courses'));
+                                        } else {
+                                            $r->print(&mt('Display roles'));
+                                        }
+                                        $r->print('</a>');
+                                    } elsif ($switchserver) {
+				        $r->print(&mt('This course requires a newer version of LON-CAPA than is installed on this server.').
+                                                  '<br />'.
+                                                  '<a href="/adm/switchserver?'.$switchserver.'">'.
+                                                  &mt('Switch Server').
+                                                  '</a>');
+                                    }
+                                    $r->print('</p>'.&Apache::loncommon::end_page());
+                                    return OK;
+                                }
+                            }
+                        }
+                    }
 # check for course groups
                     my %coursegroups = &Apache::lonnet::get_active_groups(
                           $env{'user.domain'},$env{'user.name'},$cdom, $cnum);
@@ -449,6 +530,12 @@ ENDENTERKEY
                             if (($ferr) && ($tadv)) {
 				&error_page($r,$ferr,$dest);
 			    } else {
+                                if ($dest =~ m{^/adm/coursedocs\?folderpath}) {
+                                    if ($env{'request.course.id'} eq $cdom.'_'.$cnum) { 
+                                        my $chome = &Apache::lonnet::homeserver($cnum,$cdom);
+                                        &update_content_constraints($cdom,$cnum,$chome,$cdom.'_'.$cnum);
+                                    }
+                                }
 				$r->internal_redirect($dest);
 			    }
 			    return OK;
@@ -490,7 +577,8 @@ ENDENTERKEY
                                         }
                                         &redirect_user($r, &mt('Entering [_1]',
                                                        $env{'course.'.$courseid.'.description'}),
-                                                       $dest, $msg);
+                                                       $dest, $msg,
+                                                       $env{'environment.remotenavmap'});
                                         return OK;
                                     }
 				    if (&Apache::lonnet::allowed('whn',
@@ -503,22 +591,26 @@ ENDENTERKEY
 					unless ($startpage eq 'firstres') {         
 					    $msg = &mt('Entering [_1] ...',
 						       $env{'course.'.$courseid.'.description'});
-					    &redirect_user($r, &mt('New in course'),
-                                       '/adm/whatsnew?refpage=start', $msg);
+                                            &redirect_user($r,&mt('New in course'),
+                                                           '/adm/whatsnew?refpage=start',$msg,
+                                                           $env{'environment.remotenavmap'});
 					    return OK;
 					}
 				    }
 				}
 # Are we allowed to look at the first resource?
-				if ($furl !~ m|^/adm/|) {
+				if (($furl !~ m|^/adm/|) || 
+                                    (($env{'environment.remotenavmap'} eq 'on') && 
+                                     ($furl =~ m{^/adm/navmaps}))) {
 # Guess not ...
 				    $furl=&Apache::lonpageflip::first_accessible_resource();
 				}
                                 $msg = &mt('Entering [_1] ...',
 					   $env{'course.'.$courseid.'.description'});
-				&redirect_user($r, &mt('Entering [_1]',
-                               $env{'course.'.$courseid.'.description'}),
-                               $furl, $msg);
+                                &redirect_user($r,&mt('Entering [_1]',
+                                                      $env{'course.'.$courseid.'.description'}),
+                                               $furl,$msg,
+                                               $env{'environment.remotenavmap'});
 			    }
 			    return OK;
 			}
@@ -603,6 +695,13 @@ function enterrole (thisform,rolecode,bu
        alert('$standby');
     }   
 }
+
+function setToUpdate(thisform) {
+    thisform.doupdate.value='1';
+    thisform.selectrole.value='';
+    thisform.submit();
+}
+
 // ]]>
 </script>
 ENDHEADER
@@ -665,38 +764,62 @@ ENDHEADER
     }
 # -------------------------------------------------------- Choice or no choice?
     if ($nochoose) {
-	$r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
-		  &mt('This action is currently not authorized.').'</span>'.
-		  &Apache::loncommon::end_page());
-	return OK;
+        $r->print("<h2>".&mt('Sorry ...')."</h2>\n<span class='LC_error'>".
+                  &mt('This action is currently not authorized.').'</span>'.
+                  &Apache::loncommon::end_page());
+        return OK;
     } else {
+        $r->print($updateresult);
         if (($ENV{'REDIRECT_QUERY_STRING'}) && ($fn)) {
-    	    $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
+            $fn.='?'.$ENV{'REDIRECT_QUERY_STRING'};
         }
         $r->print('<form method="post" name="rolechoice" action="'.(($fn)?$fn:$r->uri).'">');
         $r->print('<input type="hidden" name="orgurl" value="'.$fn.'" />');
         $r->print('<input type="hidden" name="selectrole" value="1" />');
         $r->print('<input type="hidden" name="newrole" value="" />');
     }
+    $r->rflush();
 
     my (%roletext,%sortrole,%roleclass,%futureroles,%timezones);
-    my ($countactive,$countfuture,$inrole,$possiblerole) = 
-        &gather_roles($then,$refresh,$now,$reinit,$nochoose,\%roletext,\%sortrole,\%roleclass,
-                      \%futureroles,\%timezones);
-
+    my ($countactive,$countfuture,$inrole,$possiblerole) =
+        &gather_roles($update,$refresh,$now,$reinit,$nochoose,\%roletext,\%sortrole,\%roleclass,
+                      \%futureroles,\%timezones,$loncaparev);
     $refresh = $now;
     &Apache::lonnet::appenv({'user.refresh.time'  => $refresh});
+    my $updatebutton = &mt('Check for role changes');
+    my $show_course=&Apache::loncommon::show_course();
+    if ($show_course) {
+        $updatebutton = &mt('Check for new courses');
+    }
+    my $do_update;
+    unless (($env{'form.source'} eq 'login') || ($env{'form.doupdate'})) {
+        $do_update = '<input type="hidden" name="doupdate" value="" />'.
+                     '<input type="button" name="update" value="'.
+                     $updatebutton.'" onclick="javascript:setToUpdate(this.form)" />';
+    }
     if ($env{'user.adv'}) {
-        $r->print('<p><label><input type="checkbox" name="showall"');
-        if ($env{'form.showall'}) { $r->print(' checked="checked" '); }
-        $r->print(' />'.&mt('Show all roles').'</label>'
-                 .' <input type="submit" value="'.&mt('Update display').'" />'
-                 .'</p>');
+        my $showall = '<label><input type="checkbox" name="showall"';
+        if ($env{'form.showall'}) {
+            $showall .= ' checked="checked" ';
+        }
+        $showall .= ' />'.&mt('Show all roles').'</label>&nbsp;'.
+                    '<input type="submit" value="'.&mt('Update display').'" />';
+        if ($do_update) {
+            $r->print('<div class="LC_left_float"><fieldset>'.
+                      '<legend>'. &mt('Display').'</legend>'.
+                      $showall.'</fieldset></div>'.
+                      '<div class="LC_left_float"><fieldset><legend>'.
+                      &mt('Changes?').'</legend>'.
+                      $do_update.'</fieldset></div><br clear="all" />');
+        } else {
+            $r->print($showall);
+        }
     } else {
+        $r->print('<p>'.$do_update.'</p>');
         if ($countactive > 0) {
             $r->print(&Apache::loncoursequeueadmin::queued_selfenrollment());
             my $domdesc = &Apache::lonnet::domain($env{'user.domain'},'description');
-            my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&'); 
+            my $esc_dom = &HTML::Entities::encode($env{'user.domain'},'"<>&');
             $r->print(
                 '<p>'
                .&mt('[_1]Visit the [_2]Course/Community Catalog[_3]'
@@ -780,17 +903,29 @@ ENDHEADER
 	    if (ref($roletext{'user.role.'.$role}) eq 'ARRAY') {
 		$output.= &Apache::loncommon::start_data_table_row().
                           $roletext{'user.role.'.$role}->[0].
-                          &Apache::loncommon::end_data_table_row().
-                          &Apache::loncommon::continue_data_table_row().
-                          $roletext{'user.role.'.$role}->[1].
                           &Apache::loncommon::end_data_table_row();
+                if ($roletext{'user.role.'.$role}->[1] ne '') {
+                    $output .= &Apache::loncommon::continue_data_table_row().
+                               $roletext{'user.role.'.$role}->[1].
+                               &Apache::loncommon::end_data_table_row();
+                }
                 if ($role =~ m{dc\./($match_domain)/} 
 		    && $dcroles{$1}) {
 		    $output .= &adhoc_roles_row($1,'recent');
                 }
 	    } elsif ($numdc > 0) {
                 unless ($role =~/^error\:/) {
-                    $output.=&display_cc_role('user.role.'.$_);
+                    my ($roletext,$role_text_end) = &display_cc_role('user.role.'.$role);
+                    if ($roletext) {
+                        $output.= &Apache::loncommon::start_data_table_row().
+                                  $roletext.
+                                  &Apache::loncommon::end_data_table_row();
+                        if ($role_text_end) {
+                            $output .= &Apache::loncommon::continue_data_table_row().
+                                       $role_text_end.
+                                       &Apache::loncommon::end_data_table_row();
+                        }
+                    }
                 }
             }
 	}
@@ -856,29 +991,24 @@ ENDHEADER
 }
 
 sub gather_roles {
-    my ($then,$refresh,$now,$reinit,$nochoose,$roletext,$sortrole,$roleclass,$futureroles,$timezones) = @_;
+    my ($update,$refresh,$now,$reinit,$nochoose,$roletext,$sortrole,$roleclass,$futureroles,$timezones,$loncaparev) = @_;
     my ($countactive,$countfuture,$inrole,$possiblerole) = (0,0,0,'');
     my $advanced = $env{'user.adv'};
     my $tryagain = $env{'form.tryagain'};
+    my @ids = &Apache::lonnet::current_machine_ids();
     foreach my $envkey (sort(keys(%env))) {
         my $button = 1;
         my $switchserver='';
+        my $switchwarning;
         my ($role_text,$role_text_end,$sortkey);
         if ($envkey=~/^user\.role\./) {
             my ($role,$where,$trolecode,$tstart,$tend,$tremark,$tstatus,$tpstart,$tpend);
-            &Apache::lonnet::role_status($envkey,$then,$refresh,$now,\$role,\$where,
+            &Apache::lonnet::role_status($envkey,$update,$refresh,$now,\$role,\$where,
                                          \$trolecode,\$tstatus,\$tstart,\$tend);
             next if (!defined($role) || $role eq '' || $role =~ /^gr/);
-            my $timezone = &role_timezone($where,$timezones);
             $tremark='';
             $tpstart='&nbsp;';
             $tpend='&nbsp;';
-            if ($tstart) {
-                $tpstart=&Apache::lonlocal::locallocaltime($tstart,$timezone);
-            }
-            if ($tend) {
-                $tpend=&Apache::lonlocal::locallocaltime($tend,$timezone);
-            }
             if ($env{'request.role'} eq $trolecode) {
                 $tstatus='selected';
             }
@@ -887,6 +1017,13 @@ sub gather_roles {
                 || ($tstatus eq 'selected')
                 || ($tstatus eq 'future')
                 || ($env{'form.showall'})) {
+                my $timezone = &role_timezone($where,$timezones);
+                if ($tstart) {
+                    $tpstart=&Apache::lonlocal::locallocaltime($tstart,$timezone);
+                }
+                if ($tend) {
+                    $tpend=&Apache::lonlocal::locallocaltime($tend,$timezone);
+                }
                 if ($tstatus eq 'is') {
                     $tbg='LC_roles_is';
                     $possiblerole=$trolecode;
@@ -912,7 +1049,7 @@ sub gather_roles {
                 if ($role =~ /^cr\//) {
                     my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
                     if ($tremark) { $tremark.='<br />'; }
-                    $tremark.=&mt('Defined by [_1] at [_2].',$rauthor,$rdomain);
+                    $tremark.=&mt('Customrole defined by [_1].',$rauthor.':'.$rdomain);
                 }
                 $trole=Apache::lonnet::plaintext($role);
                 my $ttype;
@@ -923,11 +1060,10 @@ sub gather_roles {
                 if (($role eq 'ca') || ($role eq 'aa')) {
                     my $home = &Apache::lonnet::homeserver($trest,$tdom);
                     my $allowed=0;
-                    my @ids=&Apache::lonnet::current_machine_ids();
                     foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
                     if (!$allowed) {
                         $button=0;
-                        $switchserver='otherserver='.$home.'&role='.$trolecode;
+                        $switchserver='otherserver='.$home.'&amp;role='.$trolecode;
                     }
                     #next if ($home eq 'no_host');
                     $home = &Apache::lonnet::hostname($home);
@@ -943,11 +1079,10 @@ sub gather_roles {
                     my $home = &Apache::lonnet::homeserver
                         ($env{'user.name'},$env{'user.domain'});
                     my $allowed=0;
-                    my @ids=&Apache::lonnet::current_machine_ids();
                     foreach my $id (@ids) { if ($id eq $home) { $allowed=1; } }
                     if (!$allowed) {
                         $button=0;
-                        $switchserver='otherserver='.$home.'&role='.$trolecode;
+                        $switchserver='otherserver='.$home.'&amp;role='.$trolecode;
                     }
                     #next if ($home eq 'no_host');
                     $home = &Apache::lonnet::hostname($home);
@@ -962,24 +1097,47 @@ sub gather_roles {
                     $ttype = &Apache::loncommon::course_type($tcourseid);
                     $trole = &Apache::lonnet::plaintext($role,$ttype,$tcourseid);
                     if ($env{'course.'.$tcourseid.'.description'}) {
+                        my $home=$env{'course.'.$tcourseid.'.home'};
                         $twhere=$env{'course.'.$tcourseid.'.description'};
                         $sortkey=$role."\0".$tdom."\0".$twhere."\0".$envkey;
+                        $twhere = &HTML::Entities::encode($twhere,'"<>&');
                         unless ($twhere eq &mt('Currently not available')) {
                             $twhere.=' <span class="LC_fontsize_small">'.
         &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
                                     '</span>';
+                            unless ($home && grep(/^\Q$home\E$/,@ids) && $loncaparev eq '') {
+                                my $required = $env{'course.'.$tcourseid.'.internal.releaserequired'};
+                                if ($required ne '') {
+                                    ($switchserver,$switchwarning) = 
+                                        &check_release_required($loncaparev,$tcourseid,$trolecode,$required);
+                                    if ($switchserver || $switchwarning) {
+                                        $button = 0;
+                                    }
+                                }
+                            }
                         }
                     } else {
                         my %newhash=&Apache::lonnet::coursedescription($tcourseid);
                         if (%newhash) {
                             $sortkey=$role."\0".$tdom."\0".$newhash{'description'}.
                                 "\0".$envkey;
-                            $twhere=$newhash{'description'}.
-                              ' <span class="LC_fontsize_small">'.
-        &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
-                              '</span>';
+                            $twhere=&HTML::Entities::encode($newhash{'description'},'"<>&').
+                                    ' <span class="LC_fontsize_small">'.
+                                     &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
+                                    '</span>';
                             $ttype = $newhash{'type'};
                             $trole = &Apache::lonnet::plaintext($role,$ttype,$tcourseid);
+                            my $home = $newhash{'home'};
+                            unless ($home && grep(/^\Q$home\E$/,@ids) && $loncaparev eq '') {
+                                my $required = $newhash{'internal.releaserequired'};
+                                if ($required ne '') {
+                                    ($switchserver,$switchwarning) =
+                                        &check_release_required($loncaparev,$tcourseid,$trolecode,$required);
+                                    if ($switchserver || $switchwarning) {
+                                        $button = 0;
+                                    }
+                                }
+                            }
                         } else {
                             $twhere=&mt('Currently not available');
                             $env{'course.'.$tcourseid.'.description'}=$twhere;
@@ -1003,7 +1161,7 @@ sub gather_roles {
                 ($role_text,$role_text_end) =
                     &build_roletext($trolecode,$tdom,$trest,$tstatus,$tryagain,
                                     $advanced,$tremark,$tbg,$trole,$twhere,$tpstart,
-                                    $tpend,$nochoose,$button,$switchserver,$reinit);
+                                    $tpend,$nochoose,$button,$switchserver,$reinit,$switchwarning);
                 $roletext->{$envkey}=[$role_text,$role_text_end];
                 if (!$sortkey) {$sortkey=$twhere."\0".$envkey;}
                 $sortrole->{$sortkey}=$envkey;
@@ -1023,9 +1181,15 @@ sub role_timezone {
             my $cnum = $2;
             if ($cdom && $cnum) {
                 if (!exists($timezones->{$cdom.'_'.$cnum})) {
-                    my %timehash =
-                        &Apache::lonnet::get('environment',['timezone'],$cdom,$cnum);
-                    if ($timehash{'timezone'} eq '') {
+                    my $tz;
+                    if ($env{'course.'.$cdom.'_'.$cnum.'.description'}) {
+                        $tz = $env{'course.'.$cdom.'_'.$cnum.'.timezone'};
+                    } else {
+                        my %timehash =
+                            &Apache::lonnet::get('environment',['timezone'],$cdom,$cnum);
+                        $tz = $timehash{'timezone'};
+                    }
+                    if ($tz eq '') {
                         if (!exists($timezones->{$cdom})) {
                             my %domdefaults = 
                                 &Apache::lonnet::get_domain_defaults($cdom);
@@ -1038,7 +1202,7 @@ sub role_timezone {
                         $timezones->{$cdom.'_'.$cnum} = $timezones->{$cdom};
                     } else {
                         $timezones->{$cdom.'_'.$cnum} = 
-                            &Apache::lonlocal::gettimezone($timehash{'timezone'});
+                            &Apache::lonlocal::gettimezone($tz);
                     }
                 }
                 $timezone = $timezones->{$cdom.'_'.$cnum};
@@ -1111,10 +1275,12 @@ sub print_rolerows {
                         if (ref($roletext->{$sortrole->{$which}}) eq 'ARRAY') {
                             $output.= &Apache::loncommon::start_data_table_row().
                                       $roletext->{$sortrole->{$which}}->[0].
-                                      &Apache::loncommon::end_data_table_row().
-                                      &Apache::loncommon::continue_data_table_row().
-                                      $roletext->{$sortrole->{$which}}->[1].
                                       &Apache::loncommon::end_data_table_row();
+                            if ($roletext->{$sortrole->{$which}}->[1] ne '') {
+                                $output .= &Apache::loncommon::continue_data_table_row().
+                                           $roletext->{$sortrole->{$which}}->[1].
+                                           &Apache::loncommon::end_data_table_row();
+                            }
                         }
                         if ($sortrole->{$which} =~ m-dc\./($match_domain)/-) {
                             if (ref($dcroles) eq 'HASH') {
@@ -1273,7 +1439,7 @@ sub privileges_info {
 }
 
 sub build_roletext {
-    my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit) = @_;
+    my ($trolecode,$tdom,$trest,$tstatus,$tryagain,$advanced,$tremark,$tbg,$trole,$twhere,$tpstart,$tpend,$nochoose,$button,$switchserver,$reinit,$switchwarning) = @_;
     my ($roletext,$roletext_end);
     my $is_dc=($trolecode =~ m/^dc\./);
     my $rowspan=($is_dc) ? ''
@@ -1291,6 +1457,13 @@ sub build_roletext {
             } else {
                 $roletext.=('<td'.$rowspan.' class="'.$tbg.'">&nbsp;</td>');
             }
+            if ($switchwarning) {
+                if ($tremark eq '') {
+                    $tremark = $switchwarning;
+                } else {
+                    $tremark .= '<br />'.$switchwarning;
+                }
+            }
         } elsif ($tstatus eq 'is') {
             $roletext.='<td'.$rowspan.' class="'.$tbg.'">'.
                         '<input name="'.$buttonname.'" type="button" value="'.
@@ -1374,7 +1547,7 @@ sub check_author_homeserver {
 }
 
 sub check_fordc {
-    my ($dcroles,$then) = @_;
+    my ($dcroles,$update,$then) = @_;
     my $numdc = 0;
     if ($env{'user.adv'}) {
         foreach my $envkey (sort keys %env) {
@@ -1382,8 +1555,12 @@ sub check_fordc {
                 my $dcdom = $1;
                 my $livedc = 1;
                 my ($tstart,$tend)=split(/\./,$env{$envkey});
-                if ($tstart && $tstart>$then) { $livedc = 0; }
-                if ($tend   && $tend  <$then) { $livedc = 0; }
+                my $limit = $update;
+                if ($env{'request.role'} eq 'dc./'.$dcdom.'/') {
+                    $limit = $then;
+                }
+                if ($tstart && $tstart>$limit) { $livedc = 0; }
+                if ($tend   && $tend  <$limit) { $livedc = 0; }
                 if ($livedc) {
                     $$dcroles{$dcdom} = $envkey;
                     $numdc++;
@@ -1395,19 +1572,19 @@ sub check_fordc {
 }
 
 sub adhoc_course_role {
-    my ($refresh,$then) = @_;
+    my ($refresh,$update,$then) = @_;
     my ($cdom,$cnum,$crstype);
     $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
     $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
     $crstype = &Apache::loncommon::course_type();
-    if (&check_forcc($cdom,$cnum,$refresh,$then,$crstype)) {
+    if (&check_forcc($cdom,$cnum,$refresh,$update,$then,$crstype)) {
         my $setprivs;
         if (!defined($env{'user.role.'.$env{'form.switchrole'}})) {
             $setprivs = 1;
         } else {
             my ($start,$end) = split(/\./,$env{'user.role.'.$env{'form.switchrole'}});
             if (($start && ($start>$refresh || $start == -1)) ||
-                ($end && $end<$then)) {
+                ($end && $end<$update)) {
                 $setprivs = 1;
             }
         }
@@ -1450,7 +1627,7 @@ sub adhoc_course_role {
 }
 
 sub check_forcc {
-    my ($cdom,$cnum,$refresh,$then,$crstype) = @_;
+    my ($cdom,$cnum,$refresh,$update,$then,$crstype) = @_;
     my ($is_cc,$ccrole);
     if ($crstype eq 'Community') {
         $ccrole = 'co';
@@ -1463,14 +1640,107 @@ sub check_forcc {
             if (defined($env{$envkey})) {
                 $is_cc = 1;
                 my ($tstart,$tend)=split(/\./,$env{$envkey});
+                my $limit = $update;
+                if ($env{'request.role'} eq $ccrole.'./'.$cdom.'/'.$cnum) {
+                    $limit = $then;
+                }
                 if ($tstart && $tstart>$refresh) { $is_cc = 0; }
-                if ($tend   && $tend  <$then) { $is_cc = 0; }
+                if ($tend   && $tend  <$limit) { $is_cc = 0; }
             }
         }
     }
     return $is_cc;
 }
 
+sub check_release_required {
+    my ($loncaparev,$tcourseid,$trolecode,$required) = @_;
+    my ($switchserver,$warning);
+    if ($required ne '') {
+        my ($reqdmajor,$reqdminor) = ($required =~ /^(\d+)\.(\d+)$/);
+        my ($major,$minor) = ($loncaparev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?$/);
+        if ($reqdmajor ne '' && $reqdminor ne '') {
+            my $otherserver;
+            if (($major eq '' && $minor eq '') || 
+                (($reqdmajor > $major) || (($reqdmajor == $major) && ($reqdminor > $minor)))) {
+                my ($userdomserver) = &Apache::lonnet::choose_server($env{'user.domain'});
+                my $switchlcrev = 
+                    &Apache::lonnet::get_server_loncaparev($env{'user.domain'},
+                                                           $userdomserver);
+                my ($swmajor,$swminor) = ($switchlcrev =~ /^\'?(\d+)\.(\d+)\.[\w.\-]+\'?$/);
+                if (($swmajor eq '' && $swminor eq '') || ($reqdmajor > $swmajor) || 
+                    (($reqdmajor == $swmajor) && ($reqdminor > $swminor))) {
+                    my $cdom = $env{'course.'.$tcourseid.'.domain'};
+                    if ($cdom ne $env{'user.domain'}) {
+                        my ($coursedomserver,$coursehostname) = &Apache::lonnet::choose_server($cdom); 
+                        my $serverhomeID = &Apache::lonnet::get_server_homeID($coursehostname);
+                        my $serverhomedom = &Apache::lonnet::host_domain($serverhomeID);
+                        my %defdomdefaults = &Apache::lonnet::get_domain_defaults($serverhomedom);
+                        my %udomdefaults = &Apache::lonnet::get_domain_defaults($env{'user.domain'});
+                        my $remoterev = &Apache::lonnet::get_server_loncaparev($serverhomedom,$coursedomserver);
+                        my $canhost =
+                            &Apache::lonnet::can_host_session($env{'user.domain'},
+                                                              $coursedomserver,
+                                                              $remoterev,
+                                                              $udomdefaults{'remotesessions'},
+                                                              $defdomdefaults{'hostedsessions'});
+
+                        if ($canhost) {
+                            $otherserver = $coursedomserver;
+                        } else {
+                            $warning = &mt('Requires LON-CAPA version [_1].',$env{'course.'.$tcourseid.'.internal.releaserequired'}).'<br />'. &mt("No suitable server could be found amongst servers in either your own domain or in the course's domain.");
+                        }
+                    } else {
+                        $warning = &mt('Requires LON-CAPA version [_1].',$env{'course.'.$tcourseid.'.internal.releaserequired'}).'<br />'.&mt("No suitable server could be found amongst servers in your own domain (which is also the course's domain).");
+                    }
+                } else {
+                    $otherserver = $userdomserver;
+                }
+            }
+            if ($otherserver ne '') {
+                $switchserver = 'otherserver='.$otherserver.'&amp;role='.$trolecode;
+            }
+        }
+    }
+    return ($switchserver,$warning);
+}
+
+sub update_content_constraints {
+    my ($cdom,$cnum,$chome,$cid) = @_;
+    my %curr_reqd_hash = &Apache::lonnet::userenvironment($cdom,$cnum,'internal.releaserequired');
+    my ($reqdmajor,$reqdminor) = split(/\./,$curr_reqd_hash{'internal.releaserequired'}); 
+    my %checkresponsetypes;
+    foreach my $key (keys(%Apache::lonnet::needsrelease)) {
+        my ($item,$name,$value) = split(/:/,$key);
+        if ($item eq 'resourcetag') {
+            if ($name eq 'responsetype') {
+                $checkresponsetypes{$value} = $Apache::lonnet::needsrelease{$key}
+            }
+        }
+    }
+    my $navmap = Apache::lonnavmaps::navmap->new();
+    if (defined($navmap)) {
+        my %allresponses;
+        foreach my $res ($navmap->retrieveResources(undef,sub { $_[0]->is_problem() },1,0)) {
+            my %responses = $res->responseTypes();
+            foreach my $key (keys(%responses)) {
+                next unless(exists($checkresponsetypes{$key}));
+                $allresponses{$key} += $responses{$key};
+            }
+        }
+        foreach my $key (keys(%allresponses)) {
+            my ($major,$minor) = split(/\./,$checkresponsetypes{$key});
+            if (($major > $reqdmajor) || ($major == $reqdmajor && $minor > $reqdminor)) { 
+                ($reqdmajor,$reqdminor) = ($major,$minor);
+            } 
+        }
+        undef($navmap);
+    }
+    unless (($reqdmajor eq '') && ($reqdminor eq '')) {
+        &Apache::lonnet::update_released_required($reqdmajor.'.'.$reqdminor,$cdom,$cnum,$chome,$cid);
+    }
+    return;
+}
+
 sub courselink {
     my ($dcdom,$rowtype) = @_;
     my $courseform=&Apache::loncommon::selectcourse_link
@@ -1541,16 +1811,18 @@ sub display_cc_role {
     unless ($rolekey =~/^error\:/) {
         if ($rolekey =~ m{^user\.role\.(cc|co)\./($match_domain)/($match_courseid)$}) {
             my $ccrole = $1;
-            my $tcourseid = $2.'_'.$3;
-            my $trolecode = $1.'./'.$2.'/'.$3;
+            my $tdom = $2;
+            my $trest = $3;
+            my $tcourseid = $tdom.'_'.$trest;
+            my $trolecode = $ccrole.'./'.$tdom.'/'.$trest;
             my $twhere;
             my $ttype;
             my $tbg='LC_roles_is';
             my %newhash=&Apache::lonnet::coursedescription($tcourseid);
             if (%newhash) {
                 $twhere=$newhash{'description'}.
-                        ' <span style="LC_fontsize_small">'.
-                        &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$2,$1).
+                        ' <span class="LC_fontsize_small">'.
+                        &Apache::loncommon::syllabuswrapper(&mt('Syllabus'),$trest,$tdom).
                         '</span>';
                 $ttype = $newhash{'type'};
             } else {
@@ -1558,8 +1830,8 @@ sub display_cc_role {
                 $env{'course.'.$tcourseid.'.description'}=$twhere;
             }
             my $trole = &Apache::lonnet::plaintext($ccrole,$ttype,$tcourseid);
-            $twhere.="<br />".&mt('Domain').":".$1;
-            ($roletext,$roletext_end) = &build_roletext($trolecode,$1,$2,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
+            $twhere.="<br />".&mt('Domain').":".$tdom;
+            ($roletext,$roletext_end) = &build_roletext($trolecode,$tdom,$trest,'is',$tryagain,$advanced,'',$tbg,$trole,$twhere,'','','',1,'');
         }
     }
     return ($roletext,$roletext_end);
@@ -1577,7 +1849,7 @@ sub adhoc_roles_row {
     my $carole = &Apache::lonnet::plaintext('ca');
     my $selectcalink = &coauthorlink($dcdom,$rowtype);
     $output.=$ccrole.': '.$selectcclink
-            .' | '.$carole.': '.$selectcalink
+            .' | '.$carole.': '.$selectcalink.'</td>'
             .&Apache::loncommon::end_data_table_row();
     return $output;
 }
@@ -1604,6 +1876,644 @@ sub courseloadpage {
     return $startpage;
 }
 
+sub update_session_roles {
+    my $then=$env{'user.login.time'};
+    my $refresh=$env{'user.refresh.time'};
+    if (!$refresh) {
+        $refresh = $then;
+    }
+    my $update = $env{'user.update.time'};
+    if (!$update) {
+        $update = $then;
+    }
+    my $now = time;
+    my %roleshash =
+        &Apache::lonnet::get_my_roles('','','userroles',
+                                      ['active','future','previous'],
+                                      undef,undef,1);
+    my ($msg,@newsec,$oldsec,$currrole_expired,@changed_roles,
+        %changed_groups,%dbroles,%deletedroles,%allroles,%allgroups,
+        %userroles,%checkedgroup,%crprivs,$hasgroups,%rolechange,
+        %groupchange,%newrole,%newgroup,%customprivchg,%groups_roles,
+        @rolecodes);
+    my @possroles = ('cr','st','ta','ad','ep','in','co','cc');
+    my %courseroles;
+    foreach my $item (keys(%roleshash)) {
+        my ($uname,$udom,$role,$remainder) = split(/:/,$item,4);
+        my ($tstart,$tend) = split(/:/,$roleshash{$item});
+        my ($section,$group,@group_privs);
+        if ($role =~ m{^gr/(\w*)$}) {
+            $role = 'gr';
+            my $priv = $1;
+            next if ($tstart eq '-1');
+            if (&curr_role_status($tstart,$tend,$refresh,$now) eq 'active') {
+                if ($priv ne '') {
+                    push(@group_privs,$priv);
+                }
+            }
+            if ($remainder =~ /:/) {
+                (my $additional_privs,$group) =
+                    ($remainder =~ /^([\w:]+):([^:]+)$/);
+                if ($additional_privs ne '') {
+                    if (&curr_role_status($tstart,$tend,$refresh,$now) eq 'active') {
+                        push(@group_privs,split(/:/,$additional_privs));
+                        @group_privs = sort(@group_privs);
+                    }
+                }
+            } else {
+                $group = $remainder;
+            }
+        } else {
+            $section = $remainder;
+        }
+        my $where = "/$udom/$uname";
+        if ($section ne '') {
+            $where .= "/$section";
+        } elsif ($group ne '') {
+            $where .= "/$group";
+        }
+        my $rolekey = "$role.$where";
+        my $envkey = "user.role.$rolekey";
+        $dbroles{$envkey} = 1;
+        if (($env{'request.role'} eq $rolekey) && ($role ne 'st')) {
+            if (&curr_role_status($tstart,$tend,$refresh,$now) ne 'active') {
+                $currrole_expired = 1;
+            }
+        }
+        if ($env{$envkey} eq '') {
+            my $status_in_db =
+                &curr_role_status($tstart,$tend,$refresh,$now);
+                &gather_roleprivs(\%allroles,\%allgroups,\%userroles,$where,$role,$tstart,$tend,$status_in_db);
+            if (($role eq 'st') && ($env{'request.role'} =~ m{^\Q$role\E\.\Q/$udom/$uname\E})) {
+                if ($status_in_db eq 'active') {
+                    if ($section eq '') {
+                        push(@newsec,'none');
+                    } else {
+                        push(@newsec,$section);
+                    }
+                }
+            } else {
+                unless (grep(/^\Q$role\E$/,@changed_roles)) {
+                    push(@changed_roles,$role);
+                }
+                if ($status_in_db ne 'previous') {
+                    if ($role eq 'gr') {
+                        $newgroup{$rolekey} = $status_in_db;
+                        if ($status_in_db eq 'active') {
+                            unless (ref($courseroles{$udom}) eq 'HASH') {
+                                %{$courseroles{$udom}} =
+                                    &Apache::lonnet::get_my_roles('','','userroles',
+                                                                  ['active'],\@possroles,
+                                                                  [$udom],1);
+                            }
+                            &Apache::lonnet::get_groups_roles($udom,$uname,
+                                                              $courseroles{$udom},
+                                                              \@rolecodes,\%groups_roles);
+                        }
+                    } else {
+                        $newrole{$rolekey} = $status_in_db;
+                    }
+                }
+            }
+        } else {
+            my ($currstart,$currend) = split(/\./,$env{$envkey});
+            if ($role eq 'gr') {
+                if (&curr_role_status($currstart,$currend,$refresh,$update) ne 'previous') {
+                    $hasgroups = 1;
+                }
+            }
+            if (($currstart ne $tstart) || ($currend ne $tend)) {
+                my $status_in_env =
+                    &curr_role_status($currstart,$currend,$refresh,$update);
+                my $status_in_db =
+                    &curr_role_status($tstart,$tend,$refresh,$now);
+                if ($status_in_env ne $status_in_db) {
+                    if ($status_in_env eq 'active') {
+                        if ($role eq 'st') {
+                            if ($env{'request.role'} eq $rolekey) {
+                                my $switchsection;
+                                unless (ref($courseroles{$udom}) eq 'HASH') {
+                                    %{$courseroles{$udom}} =
+                                        &Apache::lonnet::get_my_roles('','','userroles',
+                                                                      ['active'],
+                                                                      \@possroles,[$udom],1);
+                                }
+                                foreach my $crsrole (keys(%{$courseroles{$udom}})) {
+                                    if ($crsrole =~ /^\Q$uname\E:\Q$udom\E:st/) {
+                                        $switchsection = 1;
+                                        last;
+                                    }
+                                }
+                                if ($switchsection) {
+                                    if ($section eq '') {
+                                        $oldsec = 'none';
+                                    } else {
+                                        $oldsec = $section;
+                                    }
+                                    &gather_roleprivs(\%allroles,\%allgroups,\%userroles,$where,$role,$tstart,$tend,$status_in_db);
+                                } else {
+                                    $currrole_expired = 1;
+                                    next;
+                                }
+                            }
+                        }
+                        unless ($rolekey eq $env{'request.role'}) {
+                            if ($role eq 'gr') {
+                                &Apache::lonnet::delete_env_groupprivs($where,\%courseroles,\@possroles);
+                            } else {
+                                &Apache::lonnet::delenv("user.priv.$rolekey",undef,[$role]);
+                                &Apache::lonnet::delenv("user.priv.cm.$where",undef,['cm']);
+                            }
+                            &gather_roleprivs(\%allroles,\%allgroups,\%userroles,$where,$role,$tstart,$tend,$status_in_db);
+                        }
+                    } elsif ($status_in_db eq 'active') {
+                        if (($role eq 'st') &&
+                            ($env{'request.role'} =~ m{^\Q$role\E\.\Q/$udom/$uname\E})) {
+                            if ($section eq '') {
+                                push(@newsec,'none');
+                            } else {
+                                push(@newsec,$section);
+                            }
+                        } elsif ($role eq 'gr') {
+                            unless (ref($courseroles{$udom}) eq 'HASH') {
+                                %{$courseroles{$udom}} =
+                                    &Apache::lonnet::get_my_roles('','','userroles',
+                                                                  ['active'],
+                                                                  \@possroles,[$udom],1);
+                            }
+                            &Apache::lonnet::get_groups_roles($udom,$uname,
+                                                              $courseroles{$udom},
+                                                              \@rolecodes,\%groups_roles);
+                        }
+                        &gather_roleprivs(\%allroles,\%allgroups,\%userroles,$where,$role,$tstart,$tend,$status_in_db);
+                    }
+                    unless (grep(/^\Q$role\E$/,@changed_roles)) {
+                        push(@changed_roles,$role);
+                    }
+                    if ($role eq 'gr') {
+                        $groupchange{"/$udom/$uname"}{$group} = $status_in_db;
+                    } else {
+                        $rolechange{$rolekey} = $status_in_db;
+                    }
+                }
+            } else {
+                if ($role eq 'gr') {
+                    unless ($checkedgroup{$where}) {
+                        my $status_in_db =
+                            &curr_role_status($tstart,$tend,$refresh,$now);
+                        if ($tstart eq '-1') {
+                            $status_in_db = 'deleted';
+                        }
+                        unless (ref($courseroles{$udom}) eq 'HASH') {
+                            %{$courseroles{$udom}} =
+                                &Apache::lonnet::get_my_roles('','','userroles',
+                                                              ['active'],
+                                                              \@possroles,[$udom],1);
+                        }
+                        if (ref($courseroles{$udom}) eq 'HASH') {
+                            foreach my $item (keys(%{$courseroles{$udom}})) {
+                                next unless ($item =~ /^\Q$uname\E/);
+                                my ($cnum,$cdom,$crsrole,$crssec) = split(/:/,$item);
+                                my $area = '/'.$cdom.'/'.$cnum;
+                                if ($crssec ne '') {
+                                    $area .= '/'.$crssec;
+                                }
+                                my $crsrolekey = $crsrole.'.'.$area;
+                                my $currprivs = $env{'user.priv.'.$crsrole.'.'.$area.'.'.$where};
+                                $currprivs =~ s/^://;
+                                $currprivs =~ s/\&F$//;
+                                my @curr_grp_privs = split(/\&F:/,$currprivs);
+                                @curr_grp_privs = sort(@curr_grp_privs);
+                                my @diffs;
+                                if (@group_privs > 0 || @curr_grp_privs > 0) {
+                                    @diffs = &Apache::loncommon::compare_arrays(\@group_privs,\@curr_grp_privs);
+                                }
+                                if (@diffs == 0) {
+                                    last;
+                                } else {
+                                    unless(grep(/^\Qgr\E$/,@rolecodes)) {
+                                        push(@rolecodes,'gr');
+                                    }
+                                    &gather_roleprivs(\%allroles,\%allgroups,
+                                                      \%userroles,$where,$role,
+                                                      $tstart,$tend,$status_in_db);
+                                    if ($status_in_db eq 'active') {
+                                        &Apache::lonnet::get_groups_roles($udom,$uname,
+                                                                          $courseroles{$udom},
+                                                                          \@rolecodes,\%groups_roles);
+                                    }
+                                    $changed_groups{$udom.'_'.$uname}{$group} = $status_in_db;
+                                    last;
+                                }
+                            }
+                        }
+                        $checkedgroup{$where} = 1;
+                    }
+                } elsif ($role =~ /^cr/) {
+                    my $status_in_db =
+                        &curr_role_status($tstart,$tend,$refresh,$now);
+                    my ($rdummy,$rest) = split(/\//,$role,2);
+                    my ($rdummy,$rdomain,$rauthor,$rrole)=split(/\//,$role);
+                    my %currpriv;
+                    unless (exists($crprivs{$rest})) {
+                        my ($rdomain,$rauthor,$rrole)=split(/\//,$rest);
+                        my $homsvr=&Apache::lonnet::homeserver($rauthor,$rdomain);
+                        if (&Apache::lonnet::hostname($homsvr) ne '') {
+                            my ($rdummy,$roledef)=
+                            &Apache::lonnet::get('roles',["rolesdef_$rrole"],
+                                                 $rdomain,$rauthor);
+                            if (($rdummy ne 'con_lost') && ($roledef ne '')) {
+                                my $i = 0;
+                                my @scopes = ('sys','dom','crs');
+                                my @privs = split(/\_/,$roledef);
+                                foreach my $priv (@privs) {
+                                    my ($blank,@prv) = split(/:/,$priv);
+                                    @prv = map { $_ .= (/\&\w+$/ ? '':'&F') } @prv;
+                                    if (@prv) {
+                                        $priv = ':'.join(':',sort(@prv));
+                                    }
+                                    $crprivs{$rest}{$scopes[$i]} = $priv;
+                                    $i++;
+                                }
+                            }
+                        }
+                    }
+                    $currpriv{sys} = $env{"user.priv.$rolekey./"};
+                    $currpriv{dom} = $env{"user.priv.$rolekey./$udom/"};
+                    $currpriv{crs} = $env{"user.priv.$rolekey.$where"};
+                    if (keys(%crprivs)) {
+                        if (($crprivs{$rest}{sys} ne $currpriv{sys}) ||
+                            ($crprivs{$rest}{dom} ne $currpriv{dom})
+ ||
+                            ($crprivs{$rest}{crs} ne $currpriv{crs})) {
+                            &gather_roleprivs(\%allroles,\%allgroups,\%userroles,$where,$role,$tstart,$tend,$status_in_db);
+                            unless (grep(/^\Q$role\E$/,@changed_roles)) {
+                                push(@changed_roles,$role);
+                            }
+                            my $status_in_env =
+                                &curr_role_status($currstart,$currend,$refresh,$update);
+                            if ($status_in_env eq 'active') {
+                                $customprivchg{$rolekey} = $status_in_env;
+                            }
+                        }
+                    }
+                }
+            }
+        }
+    }
+    foreach my $envkey (keys(%env)) {
+        next unless ($envkey =~ /^user\.role\./);
+        next if ($dbroles{$envkey});
+        next if ($envkey eq 'user.role.'.$env{'request.role'});
+        my ($currstart,$currend) = split(/\./,$env{$envkey});
+        my $status_in_env =
+            &curr_role_status($currstart,$currend,$refresh,$update);
+        my ($rolekey) = ($envkey =~ /^user\.role\.(.+)$/);
+        my ($role,$rest)=split(/\./,$rolekey,2);
+        if (&Apache::lonnet::delenv($envkey,undef,[$role])) {
+            if ($status_in_env eq 'active') {
+                if ($role eq 'gr') {
+                    &Apache::lonnet::delete_env_groupprivs($rest,\%courseroles,
+                                                           \@possroles);
+                } else {
+                    &Apache::lonnet::delenv("user.priv.$rolekey",undef,[$role]);
+                    &Apache::lonnet::delenv("user.priv.cm.$rest",undef,['cm']);
+                }
+                unless (grep(/^\Q$role\E$/,@changed_roles)) {
+                    push(@changed_roles,$role);
+                }
+                $deletedroles{$rolekey} = 1;
+            }
+        }
+    }
+    if (($oldsec) && (@newsec > 0)) {
+        if (@newsec > 1) {
+            $msg = '<div class="LC_warning">'.&mt('The section has changed for your current role. Log-out and log-in again to select a role for the new section.').'</div>';
+        } else {
+            my $newrole = $env{'request.role'};
+            if ($newsec[0] eq 'none') {
+                $newrole =~ s{(/[^/])$}{};
+            } elsif ($oldsec eq 'none') {
+                $newrole .= '/'.$newsec[0];
+            } else {
+                $newrole =~ s{([^/]+)$}{$newsec[0]};
+            }
+            my $coursedesc = $env{'course.'.$env{'request.course.id'}.'.description'};
+            my ($curr_role) = ($env{'request.role'} =~ m{^(\w+)\./$match_domain/$match_courseid});
+            my %temp=('logout_'.$env{'request.course.id'} => time);
+            &Apache::lonnet::put('email_status',\%temp);
+            &Apache::lonnet::delenv('user.state.'.$env{'request.course.id'});
+            &Apache::lonnet::appenv({"request.course.id"   => '',
+                                     "request.course.fn"   => '',
+                                     "request.course.uri"  => '',
+                                     "request.course.sec"  => '',
+                                     "request.role"        => 'cm',
+                                     "request.role.adv"    => $env{'user.adv'},
+                                     "request.role.domain" => $env{'user.domain'}});
+            my $rolename = &Apache::loncommon::plainname($curr_role);
+            $msg = '<p><form name="reselectrole" action="/adm/roles" method="post" />'.
+                   '<input type="hidden" name="newrole" value="" />'.
+                   '<input type="hidden" name="selectrole" value="1" />'.
+                   '<span class="LC_info">'.
+                   &mt('Your section has changed for your current [_1] role in [_2].',$rolename,$coursedesc).'</span><br />';
+            my $button = '<input type="button" name="sectionchanged" value="'.
+                         &mt('Re-Select').'" onclick="javascript:enterrole(this.form,'."'$newrole','sectionchanged'".')" />';
+            if ($newsec[0] eq 'none') {
+                $msg .= &mt('[_1] to continue with your new section-less role.',$button);
+            } else {
+                $msg .= &mt('[_1] to continue with your new role in section ([_2]).',$button,$newsec[0]);
+            }
+            $msg .= '</form></p>';
+        }
+    } elsif ($currrole_expired) {
+        $msg .= '<div class="LC_warning">';
+        if (&Apache::loncommon::show_course()) {
+            $msg .= &mt('Your role in the current course has expired.');
+        } else {
+            $msg .= &mt('Your current role has expired.');
+        }
+        $msg .= '<br />'.&mt('However you can continue to use this role until you logout, click the "Re-Select" button, or your session has been idle for more than 24 hours.').'</div>';
+    }
+    if (!@changed_roles || !(keys(%changed_groups))) {
+        my ($rolesmsg,$groupsmsg);
+        if (!@changed_roles) {
+            if (&Apache::loncommon::show_course()) {
+                $rolesmsg = &mt('No new courses or communities');
+            } else {
+                $rolesmsg = &mt('No role changes');
+            }
+        }
+        if ($hasgroups && !(keys(%changed_groups)) && !(grep(/gr/,@changed_roles))) {
+            $groupsmsg = &mt('No changes in course/community groups');
+        }
+        if (!@changed_roles && !(keys(%changed_groups))) {
+            if (($msg ne '') || ($groupsmsg ne '')) {
+                $msg .= '<ul>';
+                if ($rolesmsg) {
+                    $msg .= '<li>'.$rolesmsg.'</li>';
+                }
+                if ($groupsmsg) {
+                    $msg .= '<li>'.$groupsmsg.'</li>';
+                }
+                $msg .= '</ul>';
+            } else {
+                $msg = '&nbsp;<span class="LC_cusr_emph">'.$rolesmsg.'</span><br />';
+            }
+            return $msg;
+        }
+    }
+    my $changemsg;
+    if (@changed_roles > 0) {
+        if (keys(%newgroup) > 0) {
+            my $groupmsg;
+            foreach my $item (sort(keys(%newgroup))) {
+                if (&is_active_course($item,$refresh,$update,\%roleshash)) {
+                    $groupmsg .= '<li>'.
+                                 &mt('[_1] with status: [_2].',
+                                 $item,$newgroup{$item}).'</li>';
+                }
+            }
+            if ($groupmsg) {
+                $changemsg .= '<li>'.
+                              &mt('Courses with new groups').'</li>'.
+                              '<ul>'.$groupmsg.'</ul></li>';
+            }
+        }
+        if (keys(%newrole) > 0) {
+            $changemsg .= '<li>'.&mt('New roles').
+                          '<ul>';
+            foreach my $item (sort(keys(%newrole))) {
+                $changemsg .= '<li>'.
+                              &mt('[_1] with status: [_2].',
+                              $item,$newrole{$item}).'</li>';
+            }
+            $changemsg .= '</ul></li>';
+        }
+        if (keys(%customprivchg) > 0) {
+            $changemsg .= '<li>'.
+                          &mt('Custom roles with privilege changes').
+                          '<ul>';
+            foreach my $item (sort(keys(%customprivchg))) {
+                $changemsg .= '<li>'.$item.'</li>';
+            }
+            $changemsg .= '</ul></li>';
+        }
+        if (keys(%rolechange) > 0) {
+            $changemsg .= '<li>'.
+                          &mt('Existing roles with status changes').'</li>'.
+                          '<ul>';
+            foreach my $item (sort(keys(%rolechange))) {
+                $changemsg .= '<li>'.
+                              &mt('[_1] status now: [_2].',$item,
+                              $rolechange{$item}).'</li>';
+            }
+            $changemsg .= '</ul></li>';
+        }
+        if (keys(%deletedroles) > 0) {
+            $changemsg .= '<li>'.
+                          &mt('Existing roles deleted').'</li>'.
+                          '<ul>';
+            foreach my $item (sort(keys(%deletedroles))) {
+                $changemsg .= '<li>'.$item.'</li>';
+            }
+            $changemsg .= '</ul></li>';
+        }
+    }
+    if ((keys(%changed_groups) > 0) || (keys(%groupchange) > 0)) {
+        my $groupchgmsg;
+        foreach my $key (sort(keys(%changed_groups))) {
+            my $crs = 'gr/'.$key;
+            $crs =~ s/_/\//;
+            if (&is_active_course($crs,$refresh,$update,\%roleshash)) {
+                if (ref($changed_groups{$key}) eq 'HASH') {
+                    my @showgroups;
+                    foreach my $group (sort(keys(%{$changed_groups{$key}}))) {
+                        if ($changed_groups{$key}{$group} eq 'active') {
+                            push(@showgroups,$group);
+                        }
+                    }
+                    if (@showgroups > 0) {
+                        $groupchgmsg .= '<li>'.
+                                        &mt('Course: [_1], groups: [_2].',$key,
+                                        join(', ',@showgroups)).
+                                        '</li>';
+                    }
+                }
+            }
+        }
+        if (keys(%groupchange) > 0) {
+            $groupchgmsg .= '<li>'.
+                          &mt('Existing course/community groups with status changes').'</li>'.
+                          '<ul>';
+            foreach my $crs (sort(keys(%groupchange))) {
+                if (ref($groupchange{$crs}) eq 'HASH') {
+                    $groupchgmsg .= '<li>'.&mt('Course/Community: [_1]','<b>'.$crs.'</b><ul>');
+                    foreach my $group (sort(keys(%{$groupchange{$crs}}))) {
+                        $groupchgmsg .= '<li>'.&mt('Group: [_1] status now: [_2].','<b>'.$group.'</b>',$groupchange{$crs}{$group}).'</li>';
+                    }
+                    $groupchgmsg .= '</ul></li>';
+                }
+            }
+            $groupchgmsg .= '</ul></li>';
+        }
+        if ($groupchgmsg) {
+            $changemsg .= '<li>'.
+                          &mt('Courses with changes in groups').'</li>'.
+                          '<ul>'.$groupchgmsg.'</ul></li>';
+        }
+    }
+    if ($changemsg) {
+        $msg .= '<ul>'.$changemsg.'</ul>';
+    }
+    &Apache::lonnet::set_userprivs(\%userroles,\%allroles,\%allgroups,\%groups_roles);
+    my ($curr_is_adv,$curr_role_adv,$curr_author,$curr_role_author);
+    $curr_author = $env{'user.author'};
+    if (($env{'request.role'} =~/^au/) || ($env{'request.role'} =~/^ca/) ||
+        ($env{'request.role'} =~/^aa/)) {
+        $curr_role_author=1;
+    }
+    $curr_is_adv = $env{'user.adv'};
+    $curr_role_adv = $env{'request.role.adv'};
+    if (keys(%userroles) > 0) {
+        foreach my $role (@changed_roles) {
+            unless(grep(/^\Q$role\E$/,@rolecodes)) {
+                push(@rolecodes,$role);
+            }
+        }
+        unless(grep(/^\Qcm\E$/,@rolecodes)) {
+            push(@rolecodes,'cm');
+        }
+        &Apache::lonnet::appenv(\%userroles,\@rolecodes);
+    }
+    my %newenv;
+    if (&Apache::lonnet::is_advanced_user($env{'user.domain'},$env{'user.name'})) {
+        unless ($curr_is_adv) {
+            $newenv{'user.adv'} = 1;
+        }
+    } elsif ($curr_is_adv && !$curr_role_adv) {
+        &Apache::lonnet::delenv('user.adv');
+    }
+    my %authorroleshash =
+        &Apache::lonnet::get_my_roles('','','userroles',['active'],['au','ca','aa']);
+    if (keys(%authorroleshash)) {
+        unless ($curr_author) {
+            $newenv{'user.author'} = 1;
+        }
+    } elsif ($curr_author && !$curr_role_author) {
+        &Apache::lonnet::delenv('user.author');
+    }
+    if ($env{'request.course.id'}) {
+        my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
+        my $cnum = $env{'course.'.$env{'request.course.id'}.'.num'};
+        my (@activecrsgroups,$crsgroupschanged);
+        if ($env{'request.course.groups'}) {
+            @activecrsgroups = split(/:/,$env{'request.course.groups'});
+            foreach my $item (keys(%deletedroles)) {
+                if ($item =~ m{^gr\./\Q$cdom\E/\Q$cnum\E/(\w+)$}) {
+                    if (grep(/^\Q$1\E$/,@activecrsgroups)) {
+                        $crsgroupschanged = 1;
+                        last;
+                    }
+                }
+            }
+        }
+        unless ($crsgroupschanged) {
+            foreach my $item (keys(%newgroup)) {
+                if ($item =~ m{^gr\./\Q$cdom\E/\Q$cnum\E/(\w+)$}) {
+                    if ($newgroup{$item} eq 'active') {
+                        $crsgroupschanged = 1;
+                        last;
+                    }
+                }
+            }
+        }
+        if ((ref($changed_groups{$env{'request.course.id'}}) eq 'HASH') ||
+            (ref($groupchange{"/$cdom/$cnum"}) eq 'HASH') ||
+            ($crsgroupschanged)) {
+            my %grouproles =  &Apache::lonnet::get_my_roles('','','userroles',
+                                                            ['active'],['gr'],[$cdom],1);
+            my @activegroups;
+            foreach my $item (keys(%grouproles)) {
+                next unless($item =~ /^\Q$cnum\E:\Q$cdom\E/);
+                my $group;
+                my ($crsn,$crsd,$role,$remainder) = split(/:/,$item,4);
+                if ($remainder =~ /:/) {
+                    (my $other,$group) = ($remainder =~ /^([\w:]+):([^:]+)$/);
+                } else {
+                    $group = $remainder;
+                }
+                if ($group ne '') {
+                    push(@activegroups,$group);
+                }
+            }
+            $newenv{'request.course.groups'} = join(':',@activegroups);
+        }
+    }
+    if (keys(%newenv)) {
+        &Apache::lonnet::appenv(\%newenv);
+    }
+    return $msg;
+}
+
+sub curr_role_status {
+    my ($start,$end,$refresh,$update) = @_;
+    if (($start) && ($start<0)) { return 'deleted' };
+    my $status = 'active';
+    if (($end) && ($end<=$update)) {
+        $status = 'previous';
+    }
+    if (($start) && ($refresh<$start)) {
+        $status = 'future';
+    }
+    return $status;
+}
+
+sub gather_roleprivs {
+    my ($allroles,$allgroups,$userroles,$area,$role,$tstart,$tend,$status) = @_;
+    return unless ((ref($allroles) eq 'HASH') && (ref($allgroups) eq 'HASH') && (ref($userroles) eq 'HASH'));
+    if (($area ne '') && ($role ne '')) {
+        &Apache::lonnet::userrolelog($role,$env{'user.name'},$env{'user.domain'},
+                                     $area,$tstart,$tend);
+        my $spec=$role.'.'.$area;
+        $userroles->{'user.role.'.$spec} = $tstart.'.'.$tend;
+        my ($tdummy,$tdomain,$trest)=split(/\//,$area);
+        if ($status eq 'active') {
+            if ($role =~ /^cr\//) {
+                &Apache::lonnet::custom_roleprivs($allroles,$role,$tdomain,$trest,$spec,$area);
+            } elsif ($role eq 'gr') {
+                my %rolehash = &Apache::lonnet::get('roles',[$area.'_'.$role],
+                                                    $env{'user.domain'},
+                                                    $env{'user.name'});
+                my ($trole) = split(/_/,$rolehash{$area.'_'.$role},2);
+                (undef,my $group_privs) = split(/\//,$trole);
+                $group_privs = &unescape($group_privs);
+                &Apache::lonnet::group_roleprivs($allgroups,$area,$group_privs,$tend,$tstart);
+            } else {
+                &Apache::lonnet::standard_roleprivs($allroles,$role,$tdomain,$spec,$trest,$area);
+            }
+        }
+    }
+    return;
+}
+
+sub is_active_course {
+    my ($rolekey,$refresh,$update,$roleshashref) = @_;
+    return unless(ref($roleshashref) eq 'HASH');
+    my ($role,$cdom,$cnum) = split(/\//,$rolekey);
+    my $is_active;
+    foreach my $key (keys(%{$roleshashref})) {
+        if ($key =~ /^\Q$cnum\E:\Q$cdom\E:/) {
+            my ($tstart,$tend) = split(/:/,$roleshashref->{$key});
+            my $status = &curr_role_status($tstart,$tend,$refresh,$update);
+            if ($status eq 'active') {
+                $is_active = 1;
+                last;
+            }
+        }
+    }
+    return $is_active;
+}
+
 1;
 __END__