--- loncom/interface/Attic/londropadd.pm	2006/04/22 01:06:48	1.139
+++ loncom/interface/Attic/londropadd.pm	2006/11/23 03:17:17	1.150
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Handler to drop and add students in courses 
 #
-# $Id: londropadd.pm,v 1.139 2006/04/22 01:06:48 albertel Exp $
+# $Id: londropadd.pm,v 1.150 2006/11/23 03:17:17 albertel Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -39,6 +39,7 @@ use Apache::Constants qw(:common :http R
 use Spreadsheet::WriteExcel;
 use Apache::lonstathelpers();
 use Apache::lonlocal;
+use Apache::longroup;
 
 ###############################################################
 ###############################################################
@@ -59,8 +60,8 @@ sub modifystudent {
     # if $csec is undefined, drop the student from all the courses matching
     # this one.  If $csec is defined, drop them from all other sections of 
     # this course and add them to section $csec
-    $courseid=~s/\_/\//g;
-    $courseid=~s/^(\w)/\/$1/;
+    my $cdom = $env{'request.'.$courseid.'.domain'};
+    my $cnum = $env{'request.'.$courseid.'.num'};
     my %roles = &Apache::lonnet::dump('roles',$udom,$unam);
     my ($tmp) = keys(%roles);
     # Bail out if we were unable to get the students roles
@@ -68,16 +69,16 @@ sub modifystudent {
     # Go through the roles looking for enrollment in this course
     my $result = '';
     foreach my $course (keys(%roles)) {
-        if ($course=~/^$courseid(?:\/)*(?:\s+)*(\w+)*\_st$/) {
+        if ($course=~m{^/\Q$cdom\E/\Q$cnum\E(?:\/)*(?:\s+)*(\w+)*\_st$}) {
             # We are in this course
             my $section=$1;
-            $section='' if ($course eq $courseid.'_st');
+            $section='' if ($course eq "/$cdom/$cnum".'_st');
             if (defined($csec) && $section eq $csec) {
                 $result .= 'ok:';
             } elsif ( ((!$section) && (!$csec)) || ($section ne $csec) ) {
                 my (undef,$end,$start)=split(/\_/,$roles{$course});
                 my $now=time;
-                # if this is an active role 
+                # if this is an active role
                 if (!($start && ($now<$start)) || !($end && ($now>$end))) {
                     my $reply=&Apache::lonnet::modifystudent
                         # dom  name  id mode pass     f     m     l     g
@@ -134,7 +135,9 @@ sub print_main_menu {
     my ($r,$enrl_permission,$view_permission,$grp_manage_permission,
         $grp_view_permission)=@_;
     #
-    my ($cdom,$cnum) = split/_/,$env{'request.course.id'};
+    my $cid =$env{'request.course.id'};
+    my $cdom=$env{'course.'.$cid.'.domain'};
+    my $cnum=$env{'course.'.$cid.'.num'};
     my @menu = 
         ( 
           { text => 'Upload a class list', 
@@ -176,11 +179,11 @@ sub print_main_menu {
             permission => $grp_manage_permission,
             url => '/adm/coursegroups?refpage=enrl&action=modify',
             },
-          { text => 'Delete an existing group',
-            help => 'Course_Delete_Group',
-            permission => $grp_manage_permission,
-            url => '/adm/coursegroups?refpage=enrl&action=delete',
-            },
+#          { text => 'Delete an existing group',
+#            help => 'Course_Delete_Group',
+#            permission => $grp_manage_permission,
+#            url => '/adm/coursegroups?refpage=enrl&action=delete',
+#            },
           { text => 'Enter an existing group',
             help => 'Course_Display_Group',
             permission => $grp_view_permission,
@@ -249,7 +252,7 @@ sub print_upload_manager_header {
     #
     my $javascript_validations=&javascript_validations('auth',$krbdefdom,
                                     $password_choice);
-    my $checked=(($env{'form.noFirstLine'})?' checked="1"':'');
+    my $checked=(($env{'form.noFirstLine'})?' checked="checked" ':'');
     $r->print('<h3>'.&mt('Uploading Class List')."</h3>\n".
               "<hr>\n".
               '<h3>'.&mt('Identify fields')."</h3>\n");
@@ -268,7 +271,7 @@ sub print_upload_manager_header {
     $r->print('<input type="button" value="Reverse Association" '.
               'name="'.&mt('Reverse Association').'" '.
               'onClick="javascript:this.form.associate.value=\'Reverse Association\';submit(this.form);" />');
-    $r->print('<label><input type="checkbox" name="noFirstLine" $checked />'.
+    $r->print('<label><input type="checkbox" name="noFirstLine"'.$checked.'/>'.
               &mt('Ignore First Line').'</label>');
     $r->print("<hr />\n".
               '<script type="text/javascript" language="Javascript">'."\n".
@@ -307,7 +310,7 @@ sub javascript_validations {
          ipass    => 'You need to specify the initial password.',
          name     => 'The optional name field was not specified.',
          snum     => 'The optional student number field was not specified.',
-         section  => 'The optional section or group field was not specified.', 
+         section  => 'The optional section field was not specified.', 
          email    => 'The optional email address field was not specified.',
          continue => 'Continue enrollment?',
          );
@@ -393,6 +396,7 @@ END
     }
 END
     }
+    my $section_checks;
     my $optional_checks = '';
     if ( ($mode eq 'createcourse') || ($mode eq 'modifycourse') ) {
         $optional_checks = (<<END);
@@ -400,6 +404,7 @@ END
 }
 END
     } else {
+        $section_checks = &section_check_js();
         $optional_checks = (<<END);
     var message='';
     if (foundname==0) { 
@@ -440,7 +445,7 @@ END
     if ( ($mode eq 'auth') || ($mode eq 'createcourse') || ($mode eq 'modifycourse')  ) {
         $result .= $auth_checks;
     }
-    $result .= $optional_checks;
+    $result .= $optional_checks."\n".$section_checks;
     if ( ($mode eq 'auth') || ($mode eq 'createcourse') || ($mode eq 'modifycourse')  ) {
         $result .= $authheader;
     }
@@ -451,7 +456,7 @@ END
 ###############################################################
 sub upload_manager_javascript_forward_associate {
     return(<<ENDPICK);
-function verify(vf) {
+function verify(vf,sec_caller) {
     var founduname=0;
     var foundpwd=0;
     var foundname=0;
@@ -544,7 +549,7 @@ ENDPICK
 ###############################################################
 sub upload_manager_javascript_reverse_associate {
     return(<<ENDPICK);
-function verify(vf) {
+function verify(vf,sec_caller) {
     var founduname=0;
     var foundpwd=0;
     var foundname=0;
@@ -640,7 +645,8 @@ sub print_upload_manager_footer {
     $Str .= &mt('Disable ID/Student Number Safeguard and Force Change '.
                 'of Conflicting IDs (only do if you know what you are doing)').
                 "</label>\n</p><p>\n";
-    $Str .= '<input type="button" onClick="javascript:verify(this.form)" '.
+    $Str .= '<input type="button"'. 
+              'onClick="javascript:verify(this.form,this.form.csec)" '.
         'value="Update Class List" />'."<br />\n";
     $Str .= &mt('Note: for large courses, this operation may be time '.
                 'consuming');
@@ -701,7 +707,7 @@ sub print_upload_manager_form {
              ['lname',&mt('Last Name'),       $env{'form.lname_choice'}],
              ['gen',  &mt('Generation'),      $env{'form.gen_choice'}],
              ['id',   &mt('ID/Student Number'),$env{'form.id_choice'}],
-             ['sec',  &mt('Group/Section'),   $env{'form.sec_choice'}],
+             ['sec',  &mt('Section'),          $env{'form.sec_choice'}],
              ['ipwd', &mt('Initial Password'),$env{'form.ipwd_choice'}],
              ['email',&mt('EMail Address'),   $env{'form.email_choice'}]);
 	if ($env{'form.upfile_associate'} eq 'reverse') {	
@@ -742,8 +748,12 @@ sub enroll_single_student {
     $r->print('<h3>'.&mt('Enrolling Student').'</h3>');
     $r->print('<p>'.&mt('Enrolling').' '.$env{'form.cuname'}." \@ ".
               $env{'form.lcdomain'}.'</p>');
-    if (($env{'form.cuname'})&&($env{'form.cuname'}!~/\W/)&&
-        ($env{'form.lcdomain'})&&($env{'form.lcdomain'}!~/\W/)) {
+    if (($env{'form.cuname'})
+	&& ($env{'form.cuname'} 
+	    eq &LONCAPA::clean_username($env{'form.cuname'}))
+	&& ($env{'form.lcdomain'})
+	&& ($env{'form.lcdomain'}
+	    eq &LONCAPA::clean_domain($env{'form.lcdomain'}))) {
         # Deal with home server selection
         my $domain=$env{'form.lcdomain'};
         my $desiredhost = $env{'form.lcserver'};
@@ -905,7 +915,8 @@ sub make_dates_default {
         $result .= "Set default start and end dates for course<br />";
         #
         # Refresh the course environment
-        &Apache::lonnet::coursedescription($env{'request.course.id'});
+        &Apache::lonnet::coursedescription($env{'request.course.id'},
+					   {'freshen_cache' => 1});
     } else {
         $result .= &mt('Unable to set default dates for course').":".$put_result.
             '<br />';
@@ -952,10 +963,8 @@ sub print_enroll_single_student_form {
     my $r=shift;
     $r->print("<h3>".&mt('Enroll One Student')."</h3>");
     #
-    my $username = $env{'form.cuname'};
-    my $domain   = $env{'form.cudomain'};
-    $username=~s/\W//gs;
-    $domain=~s/\W//gs;
+    my $username = &LONCAPA::clean_username($env{'form.cuname'});
+    my $domain   = &LONCAPA::clean_domain($env{'form.cudomain'});
     my $home = &Apache::lonnet::homeserver($username,$domain);
     # $new_user flags whether we are creating a new user or using an old one
     my $new_user = 1;
@@ -1073,7 +1082,7 @@ END
         # Print it all out
     my %lt=&Apache::lonlocal::texthash(
 		   'cd'   => "Course Data",
-                   'gs'   => "Group/Section",
+                   'gs'   => "Section",
                    'idsn' => "ID/Student Number",
                    'disn' => "Disable ID/Student Number Safeguard and Force Change of Conflicting IDs (only do if you know what you are doing)",
                    'eas'  => "Enroll as student",
@@ -1084,7 +1093,7 @@ END
 <input type="hidden" name="cuname" value="$username" />
 <input type="hidden" name="lcdomain" value="$domain" />
 <script type="text/javascript" language="Javascript">
-function verify(vf) {
+function verify(vf,sec_caller) {
     var founduname=0;
     var foundpwd=0;
     var foundname=0;
@@ -1101,6 +1110,9 @@ function verify(vf) {
     }
     if ((typeof(vf.csec.value)!="undefined") && (vf.csec.value!='')) {
         foundsec=1;
+        if (validate(sec_caller) == "error") {
+            return;
+        }
     }
     if ((typeof(vf.cstid.value)!="undefined") && (vf.cstid.value!='')) {
 	foundid=1;
@@ -1137,7 +1149,7 @@ $lt{'idsn'}: <input type="text" name="cs
 $lt{'disn'}
 </label>
 </p><p>
-<input type="button" onClick="verify(this.form)" value="$lt{'eas'}">
+<input type="button" onClick="verify(this.form,this.form.csec)" value="$lt{'eas'}">
 </p>
 END
     return;
@@ -1164,12 +1176,12 @@ sub print_html_classlist {
     if (! exists($env{'form.sortby'})) {
         $env{'form.sortby'} = 'username';
     }
-    if ($env{'form.Status'} !~ /^(Any|Expired|Active)$/) {
+    if ($env{'form.Status'} !~ /^(Any|Expired|Active|Future)$/) {
         $env{'form.Status'} = 'Active';
     }
     my $status_select = &Apache::lonhtmlcommon::StatusOptions
         ($env{'form.Status'});
-    my $cid=$env{'request.course.id'};
+    my $cid =$env{'request.course.id'};
     my $cdom=$env{'course.'.$cid.'.domain'};
     my $cnum=$env{'course.'.$cid.'.num'};
     #
@@ -1242,6 +1254,10 @@ sub print_html_classlist {
 sub show_class_list {
     my ($r,$mode,$linkto,$statusmode,$classlist,$keylist)=@_;
     my $cid=$env{'request.course.id'};
+    my $cdom = $env{'course.'.$cid.'.domain'};
+    my $cnum = $env{'course.'.$cid.'.num'};
+    my ($classgroups) = &Apache::loncoursedata::get_group_memberships(
+                                              $classlist,$keylist,$cdom,$cnum);
     #
     # Variables for excel output
     my ($excel_workbook, $excel_sheet, $excel_filename,$row,$format);
@@ -1250,7 +1266,7 @@ sub show_class_list {
     my ($CSVfile,$CSVfilename);
     #
     my $sortby = $env{'form.sortby'};
-    if ($sortby !~ /^(username|domain|section|fullname|id|start|end|type)$/) {
+    if ($sortby !~ /^(username|domain|section|groups|fullname|id|start|end|type)$/) {
         $sortby = 'username';
     }
     if (! exists($env{'form.displayphotos'})) {
@@ -1270,15 +1286,16 @@ END
 END
     if ($mode eq 'html' || $mode eq 'view' || $mode eq 'autoenroll') {
         if ($linkto eq 'aboutme') {
-            $r->print(&mt('Select a user name to view the users personal page.'));
+            $r->print(&mt("Select a user name to view the user's personal page."));
         } elsif ($linkto eq 'modify') {
-            $r->print(&mt('Select a user name to modify the students information'));
+            $r->print(&mt("Select a user name to modify the student's information"));
         }
 	my %lt=&Apache::lonlocal::texthash(
                                            'usrn'   => "username",
                                            'dom'    => "domain",
                                            'sn'     => "student name",
                                            'sec'    => "section",
+                                           'grp'    => "active groups",
                                            'start'  => "start date",
                                            'end'    => "end date",
                                            'type'   => "enroll type/action",
@@ -1332,6 +1349,8 @@ function photowindow(photolink) {
        <a href="javascript:document.studentform.sortby.value='start';document.studentform.submit();">$lt{'start'}</a>
     </th><th>
        <a href="javascript:document.studentform.sortby.value='end';document.studentform.submit();">$lt{'end'}</a>
+    </th><th>
+       <a href="javascript:document.studentform.sortby.value='groups';document.studentform.submit();">$lt{'grp'}</a>
     </th>
 END
         if ($env{'course.'.$env{'request.course.id'}.'.internal.showphoto'}) {
@@ -1368,16 +1387,20 @@ END
         if($statusmode eq 'Expired') {
             print $CSVfile '"'.&mt('Students with expired roles').'"'."\n";
         }
+        if($statusmode eq 'Future') {
+            print $CSVfile '"'.&mt('Students with future roles').'"'."\n";
+        }
         if ($statusmode eq 'Any') {
             print $CSVfile '"'.join('","',map {
 		&Apache::loncommon::csv_translate(&mt($_))
                 } ("username","domain","ID","student name",
-                   "section","start date","end date","status")).'"'."\n";
+                   "section","start date","end date","status","active groups"))
+                  .'"'."\n";
         } else {
             print $CSVfile '"'.join('","',map {
 		&Apache::loncommon::csv_translate(&mt($_))
                 } ("username","domain","ID","student name",
-                   "section","start date","end date")).'"'."\n";
+                   "section","start date","end date","active groups")).'"'."\n";
         }
     } elsif ($mode eq 'excel') {
         # Create the excel spreadsheet
@@ -1392,7 +1415,8 @@ END
         #
         $excel_sheet->write($row++,0,["username","domain","ID",
                                       "student name","section",
-                                      "start date","end date","status"],
+                                      "start date","end date","status",
+                                      "active groups"],
                             $format->{'bold'});
     }
     #
@@ -1402,6 +1426,7 @@ END
     foreach (@$keylist) {
         $index{$_} = $i++;
     }
+    $index{'groups'} = scalar(@{$keylist});
     my $index  = $index{$sortby};
     my $second = $index{'username'};
     my $third  = $index{'domain'};
@@ -1419,9 +1444,14 @@ END
     my $lockcount = 0;
     foreach my $student (@Sorted_Students) {
         my $sdata = $classlist->{$student};
+        my $groups = $classgroups->{$student};
         my $username = $sdata->[$index{'username'}];
         my $domain   = $sdata->[$index{'domain'}];
         my $section  = $sdata->[$index{'section'}];
+        my $active_groups;
+        if (ref($groups->{active}) eq 'HASH') {
+            $active_groups = join(', ',keys(%{$groups->{'active'}}));
+        }
         my $name     = $sdata->[$index{'fullname'}];
         my $id       = $sdata->[$index{'id'}];
         my $status   = $sdata->[$index{'status'}];
@@ -1487,6 +1517,7 @@ END
     <td>$section</td>
     <td>$start</td>
     <td>$end</td>
+    <td>$active_groups</td>
 END
             if ($env{'course.'.$env{'request.course.id'}.
 			 '.internal.showphoto'}) {
@@ -1522,6 +1553,7 @@ END
             if ($statusmode eq 'Any') {
                 push @line,&Apache::loncommon::csv_translate($status);
             }
+            push @line,&Apache::loncommon::csv_translate($active_groups);
             print $CSVfile '"'.join('","',@line).'"'."\n";
         } elsif ($mode eq 'excel') {
             $excel_sheet->write($row,0,[$username,$domain,$id,
@@ -1537,6 +1569,7 @@ END
                 }                    
             }
             $excel_sheet->write($row,$col++,$status);
+            $excel_sheet->write($row,$col++,$active_groups);
             $row++;
         }
     }
@@ -1616,7 +1649,7 @@ sub print_modify_student_form {
     my $date_table = &date_setting_table($starttime,$endtime);
     #
     if (! exists($env{'form.Status'}) || 
-        $env{'form.Status'} !~ /^(Any|Expired|Active)$/) {
+        $env{'form.Status'} !~ /^(Any|Expired|Active|Future)$/) {
         $env{'form.Status'} = 'crap';
     }
     # Make sure student is enrolled in course
@@ -1633,7 +1666,19 @@ sub print_modify_student_form {
                    'sec'   => "Section",
                    'sm'    => "Submit Modifications",
 				       );
-    $r->print(<<END);
+# Check if section name is valid
+    my $section_check = &section_check_js();
+    $r->print(<<"END");
+<script type="text/javascript">
+$section_check
+function secverify(formname,caller) {
+    if (validate(caller) == "error") {
+        return;
+    } else {
+        formname.submit();
+    }
+}
+</script>
 <p>
 <font size="+1">
 $lt{'odcc'}
@@ -1669,7 +1714,7 @@ $lt{'disn'}
 </p>
 <p>$current_date_description</p>
 <p>$date_table</p>
-<input type="submit" value="$lt{'sm'}" />
+<input type="button" value="$lt{'sm'}" onClick="secverify(this.form,this.form.section)" />
 END
     $r->print(&Apache::loncommon::end_page());
     return;
@@ -1829,7 +1874,8 @@ END
 sub get_enrollment_data {
     my ($sname,$sdomain) = @_;
     my $courseid = $env{'request.course.id'};
-    $courseid =~ s:_:/:g;
+    my $cdom = $env{'request.'.$courseid.'.domain'};
+    my $cnum = $env{'request.'.$courseid.'.num'};
     my %roles = &Apache::lonnet::dump('roles',$sdomain,$sname);
     my ($tmp) = keys(%roles);
     # Bail out if we were unable to get the students roles
@@ -1839,7 +1885,7 @@ sub get_enrollment_data {
     my $section = '';
     my $count = scalar(keys(%roles));
     while (my ($course,$role) = each(%roles)) {
-        if ($course=~ /^\/$courseid\/*\s*(\w+)*_st$/ ) {
+        if ($course=~m{^/\Q$cdom\E/\Q$cnum\E/*\s*(\w+)*_st$} ) {
             #
             # Get active role
             $section=$1;
@@ -1893,9 +1939,13 @@ sub show_drop_list {
                                                 ['sortby']);
     }
     my $sortby = $env{'form.sortby'};
-    if ($sortby !~ /^(username|domain|section|fullname|id|start|end)$/) {
+    if ($sortby !~ /^(username|domain|section|groups|fullname|id|start|end)$/) {
         $sortby = 'username';
     }
+    my $cdom = $env{'course.'.$cid.'.domain'};
+    my $cnum = $env{'course.'.$cid,'.num'};
+    my ($classgroups) = &Apache::loncoursedata::get_group_memberships(
+                                              $classlist,$keylist,$cdom,$cnum);
     #
     my $action = "drop";
     $r->print(<<END);
@@ -1923,6 +1973,7 @@ my %lt=&Apache::lonlocal::texthash('usrn
                                    'sec'    => "section",
                                    'start'  => "start date",
                                    'end'    => "end date",
+                                   'groups' => "active groups",
                                    );
     if ($nosort) {
 	$r->print(&Apache::loncommon::start_data_table());
@@ -1936,6 +1987,7 @@ my %lt=&Apache::lonlocal::texthash('usrn
     <th>$lt{'sec'}</th>
     <th>$lt{'start'}</th>
     <th>$lt{'end'}</th>
+    <th>$lt{'groups'}</th>
 </tr>
 END
 
@@ -1957,6 +2009,8 @@ END
        <a href="/adm/dropadd?action=$action&sortby=start">$lt{'start'}</a>
     </th><th>
        <a href="/adm/dropadd?action=$action&sortby=end">$lt{'end'}</a>
+    </th><th>
+       <a href="/adm/dropadd?action=$action&sortby=groups">$lt{'groups'}</a>
     </th>
 </tr>
 END
@@ -1968,6 +2022,7 @@ END
     foreach (@$keylist) {
         $index{$_} = $i++;
     }
+    $index{'groups'} = scalar(@$keylist);
     my $index  = $index{$sortby};
     my $second = $index{'username'};
     my $third  = $index{'domain'};
@@ -1988,6 +2043,11 @@ END
         my $id       = $sdata->[$index{'id'}];
         my $start    = $sdata->[$index{'start'}];
         my $end      = $sdata->[$index{'end'}];
+        my $groups = $classgroups->{$student};
+        my $active_groups;
+        if (ref($groups->{active}) eq 'HASH') {
+            $active_groups = join(', ',keys(%{$groups->{'active'}}));
+        }
         if (! defined($start) || $start == 0) {
             $start = &mt('none');
         } else {
@@ -2011,6 +2071,7 @@ END
     <td>$section</td>
     <td>$start</td>
     <td>$end</td>
+    <td>$active_groups</td>
 END
         $r->print(&Apache::loncommon::end_data_table_row());
     }
@@ -2137,7 +2198,8 @@ sub upfile_drop_add {
             $amode = ''; # This causes the loop below to be skipped
         }
     }
-    unless (($domain=~/\W/) || ($amode eq '')) {
+    if ( $domain eq &clean_domain($domain)
+	&& ($amode ne '')) {
         #######################################
         ##         Enroll Students           ##
         #######################################
@@ -2145,6 +2207,8 @@ sub upfile_drop_add {
         my $count=0;
         my $flushc=0;
         my %student=();
+        # Get information about course groups
+        my %curr_groups = &Apache::longroup::coursegroups();
         # Get new classlist
         foreach (@studentdata) {
             my %entries=&Apache::loncommon::record_sep($_);
@@ -2169,7 +2233,8 @@ sub upfile_drop_add {
                         $gen=$entries{$fields{'gen'}};
                     }
                 }
-                if ($entries{$fields{'username'}}=~/\W/) {
+                if ($entries{$fields{'username'}}
+		    ne &LONCAPA::clean_username($entries{$fields{'username'}})) {
                     $r->print('<br />'.
       &mt('<b>[_1]</b>: Unacceptable username for user [_2] [_3] [_4] [_5]',
           $entries{$fields{'username'}},$fname,$mname,$lname,$gen).
@@ -2185,6 +2250,17 @@ sub upfile_drop_add {
                     }
                     # remove non alphanumeric values from section
                     $sec =~ s/\W//g;
+                    if ($sec eq "none" || $sec eq 'all') {
+                        $r->print('<br />'.
+      &mt('<b>[_1]</b>: Unable to enroll: section name "[_2]" for user [_3] [_4] [_5] [_6] is a reserved word.',
+                        $username,$sec,$fname,$mname,$lname,$gen));
+                        next;
+                    } elsif (($sec ne '') && (exists($curr_groups{$sec}))) {
+                        $r->print('<br />'.
+      &mt('<b>[_1]</b>: Unable to enroll: section name "[_2]" for user [_3] [_4] [_5] [_6] is a course group. Section names and group names must be distinct.',
+                        $username,$sec,$fname,$mname,$lname,$gen));
+                        next;
+                    }
                     # determine student id number
                     my $id='';
                     if (defined($fields{'id'})) {
@@ -2300,6 +2376,33 @@ sub drop_student_list {
     $r->print('<p>'.&mt('Re-enrollment will re-activate data.')) if ($count);
 }
 
+sub section_check_js {
+    my $groupslist;
+    my %curr_groups = &Apache::longroup::coursegroups();
+    if (%curr_groups) {
+        $groupslist = join('","',sort(keys(%curr_groups)));
+    }
+    return <<"END";
+function validate(caller) {
+    var groups = new Array("$groupslist");
+    var secname = caller.value;
+    if ((secname == 'all') || (secname == 'none')) {
+        alert("'"+secname+"' may not be used as the name for a section, as it is a reserved word.\\nPlease choose a different section name.");
+        return 'error';
+    }
+    if (secname != '') {
+        for (var k=0; k<groups.length; k++) {
+            if (secname == groups[k]) {
+                alert("'"+secname+"' may not be used as the name for a section, as it is the name of a course group.\\nSection names and group names must be distinct. Please choose a different section name.");
+                return 'error';
+            }
+        }
+    }
+    return 'ok';
+}
+END
+}
+
 ###################################################################
 ###################################################################
 
@@ -2387,16 +2490,15 @@ sub handler {
     #
     # Main switch on form.action and form.state, as appropriate
     if (! exists($env{'form.action'})) {
-        $r->print(&Apache::lonhtmlcommon::breadcrumbs
-                  (undef,'Enrollment Manager'));
+        $r->print(&Apache::lonhtmlcommon::breadcrumbs('Enrollment Manager'));
         &print_main_menu($r,$enrl_permission,$view_permission,$grp_manage_permission,
                          $grp_view_permission);
     } elsif ($env{'form.action'} eq 'upload' && $enrl_permission) {
         &Apache::lonhtmlcommon::add_breadcrumb
             ({href=>'/adm/dropadd?action=upload&state=',
               text=>"Upload Classlist"});
-        $r->print(&Apache::lonhtmlcommon::breadcrumbs
-                  (undef,'Upload Classlist','Course_Create_Class_List'));
+        $r->print(&Apache::lonhtmlcommon::breadcrumbs('Upload Classlist',
+						      'Course_Create_Class_List'));
         if (! exists($env{'form.state'})) {
             &print_first_courselist_upload_form($r);            
         } elsif ($env{'form.state'} eq 'got_file') {
@@ -2414,8 +2516,8 @@ sub handler {
         &Apache::lonhtmlcommon::add_breadcrumb
             ({href=>'/adm/dropadd?action=drop',
               text=>"Drop Students"});
-        $r->print(&Apache::lonhtmlcommon::breadcrumbs
-                  (undef,'Drop Students','Course_Drop_Student'));
+        $r->print(&Apache::lonhtmlcommon::breadcrumbs('Drop Students',
+						      'Course_Drop_Student'));
         if (! exists($env{'form.state'})) {
             &print_drop_menu($r);
         } elsif ($env{'form.state'} eq 'done') {
@@ -2427,8 +2529,8 @@ sub handler {
         &Apache::lonhtmlcommon::add_breadcrumb
             ({href=>'/adm/dropadd?action=enrollstudent',
               text=>"Enroll Student"});
-        $r->print(&Apache::lonhtmlcommon::breadcrumbs
-                  (undef,'Enroll Student','Course_Add_Student'));
+        $r->print(&Apache::lonhtmlcommon::breadcrumbs('Enroll Student',
+						      'Course_Add_Student'));
         if (! exists($env{'form.state'})) {
             &get_student_username_domain_form($r);
         } elsif ($env{'form.state'} eq 'gotusername') {
@@ -2442,8 +2544,8 @@ sub handler {
         &Apache::lonhtmlcommon::add_breadcrumb
             ({href=>'/adm/dropadd?action=classlist',
               text=>"View Classlist"});
-        $r->print(&Apache::lonhtmlcommon::breadcrumbs
-                  (undef,'View Classlist','Course_View_Class_List'));
+        $r->print(&Apache::lonhtmlcommon::breadcrumbs('View Classlist',
+						      'Course_View_Class_List'));
         if (! exists($env{'form.state'})) {
             &print_html_classlist($r,undef);
         } elsif ($env{'form.state'} eq 'csv') {
@@ -2457,8 +2559,8 @@ sub handler {
         &Apache::lonhtmlcommon::add_breadcrumb
             ({href=>'/adm/dropadd?action=modifystudent',
               text=>"Modify Student Data"});
-        $r->print(&Apache::lonhtmlcommon::breadcrumbs
-                  (undef,'Modify Student Data','Course_Modify_Student_Data'));
+        $r->print(&Apache::lonhtmlcommon::breadcrumbs('Modify Student Data',
+						      'Course_Modify_Student_Data'));
         if (! exists($env{'form.state'})) {
             &print_html_classlist($r);
         } elsif ($env{'form.state'} eq 'selected') {
@@ -2473,8 +2575,7 @@ sub handler {
         &Apache::lonnet::logthis("Undetermined state in londropadd.pm.  ".
                                  "form.action = ".$env{'form.action'}.
                                  "Someone should fix this.");
-        $r->print(&Apache::lonhtmlcommon::breadcrumbs
-                  (undef,'Enrollment Manager'));
+        $r->print(&Apache::lonhtmlcommon::breadcrumbs('Enrollment Manager'));
         &print_main_menu($r,$enrl_permission,$view_permission);
     }
     #