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edited all chat / Chat => chat room, one entry in mydesk.tab for chatroom and added some missing translations in de.pm

    1: # The LearningOnline Network with CAPA
    2: # accessor routines used to provide information about course groups 
    3: #
    4: # $Id: longroup.pm,v 1.22 2009/02/25 16:39:54 hauer Exp $
    5: #
    6: # Copyright Michigan State University Board of Trustees
    7: #
    8: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    9: #
   10: # LON-CAPA is free software; you can redistribute it and/or modify
   11: # it under the terms of the GNU General Public License as published by
   12: # the Free Software Foundation; either version 2 of the License, or
   13: # (at your option) any later version.
   14: #
   15: # LON-CAPA is distributed in the hope that it will be useful,
   16: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   17: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   18: # GNU General Public License for more details.
   19: #
   20: # You should have received a copy of the GNU General Public License
   21: # along with LON-CAPA; if not, write to the Free Software
   22: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   23: #
   24: # /home/httpd/html/adm/gpl.txt
   25: #
   26: # http://www.lon-capa.org/
   27: #
   28: 
   29: package Apache::longroup;
   30: 
   31: use strict;
   32: use Apache::lonnet;
   33: use Apache::lonlocal;
   34: 
   35: ###############################################
   36: =pod
   37: 
   38: =item coursegroups
   39: 
   40: Retrieve information about groups in a course,
   41: 
   42: Input:
   43: 1. Optional course domain
   44: 2. Optional course number
   45: 3. Optional group name
   46: 4. Optional namespace
   47: 
   48: Course domain and number will be taken from user's
   49: environment if not supplied. Optional group name will 
   50: be passed to lonnet function as a regexp to
   51: use in the call to the dump function.  Optional namespace
   52: will determine whether information is retrieved about current 
   53: groups (default) or deleted groups (namespace = deleted_groups). 
   54: 
   55: Output
   56: Returns hash of groups in a course (subject to the
   57: optional group name filter). In the hash, the keys are
   58: group names, and their corresponding values
   59: are scalars containing group information in XML. This
   60: can be sent to &get_group_settings() to be parsed.
   61: 
   62: Side effects:
   63: None.
   64: 
   65: =cut
   66: 
   67: ###############################################
   68: 
   69: sub coursegroups {
   70:     my ($cdom,$cnum,$group,$namespace) = @_;
   71:     if (!defined($cdom) || !defined($cnum)) {
   72:         my $cid =  $env{'request.course.id'};
   73: 
   74:         return if (!defined($cid));
   75: 
   76:         $cdom = $env{'course.'.$cid.'.domain'};
   77:         $cnum = $env{'course.'.$cid.'.num'};
   78:     }
   79:     if (!defined($namespace)) {
   80:         $namespace = 'coursegroups';
   81:     } 
   82:     my %groups =  &Apache::lonnet::get_coursegroups($cdom,$cnum,$group,
   83:                                                     $namespace);
   84:     if (my $tmp = &Apache::lonnet::error(%groups)) {
   85: 	undef(%groups);
   86:         &Apache::lonnet::logthis('Error retrieving groups: '.$tmp.' in '.$cnum.':'.$cdom.' - '.$namespace);
   87:     }
   88:     if (defined($groups{'group_allfolders'."\0".'locked_folder'})) {
   89:         delete($groups{'group_allfolders'."\0".'locked_folder'}); 
   90:     }
   91:     return %groups;
   92: }
   93: 
   94: ###############################################
   95: 
   96: =pod 
   97: 
   98: =item get_group_settings
   99: 
  100: Uses TokeParser to extract group information from the
  101: XML used to describe course groups.
  102: 
  103: Input:
  104: Scalar containing XML  - as retrieved from &coursegroups().
  105: 
  106: Output:
  107: Hash containing group information as key=values for (a), and
  108: hash of hashes for (b)
  109: 
  110: Keys (in two categories):
  111: (a) groupname, creator, creation, modified, startdate, enddate, quota.
  112: Corresponding values are name of the group, creator of the group
  113: (username:domain), UNIX time for date group was created, and
  114: settings were last modified, file quota, and default start and end 
  115: access times for group members.
  116: 
  117: (b) functions returned in hash of hashes.
  118: Outer hash key is functions.
  119: Inner hash keys are chat,discussion,email,files,homepage,roster.
  120: Corresponding values are either on or off, depending on
  121: whether this type of functionality is available for the group.
  122: 
  123: =cut
  124: 
  125: ###############################################
  126: 
  127: sub get_group_settings {
  128:     my ($groupinfo)=@_;
  129:     my $parser=HTML::TokeParser->new(\$groupinfo);
  130:     my $token;
  131:     my $tool = '';
  132:     my $role = '';
  133:     my %content=();
  134:     while ($token=$parser->get_token) {
  135:         if ($token->[0] eq 'S')  {
  136:             my $entry=$token->[1];
  137:             if ($entry eq 'functions' || $entry eq 'autosec') {
  138:                 %{$content{$entry}} = ();
  139:                 $tool = $entry;
  140:             } elsif ($entry eq 'role') {
  141:                 if ($tool eq 'autosec') {
  142:                     $role = $token->[2]{id};
  143:                     @{$content{$tool}{$role}} = ();
  144:                 }
  145:             } else {
  146:                 my $value=$parser->get_text('/'.$entry);
  147:                 if ($entry eq 'name') {
  148:                     if ($tool eq 'functions') {
  149:                         my $function = $token->[2]{id};
  150:                         $content{$tool}{$function} = $value;
  151:                     }
  152:                 } elsif ($entry eq 'groupname') {
  153:                     $content{$entry}=&unescape($value);
  154:                 } elsif (($entry eq 'roles') || ($entry eq 'types') ||
  155:                          ($entry eq 'sectionpick') || ($entry eq 'defpriv')) {
  156:                     push(@{$content{$entry}},$value);
  157:                 } elsif ($entry eq 'section') {
  158:                     if ($tool eq 'autosec'  && $role ne '') {
  159:                         push(@{$content{$tool}{$role}},$value);
  160:                     }
  161:                 } else {
  162:                     $content{$entry}=$value;
  163:                 }
  164:             }
  165:         } elsif ($token->[0] eq 'E') {
  166:             if ($token->[1] eq 'functions' || $token->[1] eq 'autosec') {
  167:                 $tool = '';
  168:             } elsif ($token->[1] eq 'role') {
  169:                 $role = '';
  170:             }
  171:         }
  172:     }
  173:     return %content;
  174: }
  175: 
  176: ###############################################
  177: 
  178: sub check_group_access {
  179:     my ($group) = @_;
  180:     my $access = 1;
  181:     my $now = time;
  182:     my ($start,$end) = split(/\./,$env{'user.role.gr/'.$env{'request.course,id'}.'/'.$group});
  183:     if (($end!=0) && ($end<$now)) { $access = 0; }
  184:     if (($start!=0) && ($start>$now)) { $access=0; }
  185:     return $access;
  186: }
  187: 
  188: ###############################################
  189: 
  190: =pod
  191: 
  192: =item group_changes
  193: 
  194: Add or drop group memberships in a course as a result of
  195: changes in a user's roles/sections. Called by
  196: &Apache::lonnet:assignrole()     
  197: 
  198: Input:
  199: 1. User's domain
  200: 2. User's username
  201: 3. Url of role
  202: 4. Role
  203: 5. End date of role
  204: 6. Start date of role
  205: 7. Selfenroll
  206: 8. Context
  207: 
  208: Checks to see if role for which assignment is being made is in a course.
  209: If so, gathers information about auto-group population settings for
  210: groups in the course.
  211: 
  212: If role is being expired, will also expire any group memberships that
  213: are specified for auto-group population for the specific role and
  214: section (including section 'none' and 'all' sections), unless a
  215: different role/section also included in auto-group population
  216: for the course is included amongst the user's unexpired roles
  217: and would trigger membership in teh same group(s) 
  218: 
  219: If role is being added, will add any group memberships specified
  220: for auto-group population, unless use is already a group member.
  221: Uses default group privileges and default start and end group access
  222: times.
  223: 
  224: Flag for selfenroll (value of 1), and context (auto, updatenow, 
  225: automated, course, domain etc.) can be used to log the reason for
  226: the role change.     
  227: 
  228: Output
  229: None
  230: 
  231: Side effects:
  232: May result in calls to Apache::lonnet::modify_group_roles()
  233: and Apache::lonnet::modify_coursegroup_membership() to add
  234: or expire group membership(s) for a user. 
  235: 
  236: =cut
  237: 
  238: sub group_changes {
  239:     my ($udom,$uname,$url,$role,$origend,$origstart,$selfenroll,$context) = @_;
  240:     my $now = time;
  241:     my $chgtype;
  242:     if ($origend > 0 && $origend <= $now) {
  243:         $chgtype = 'drop';
  244:     } else {
  245:         $chgtype = 'add';
  246:     }
  247:     my ($cid,$cdom,$cnum,$sec);
  248:     if ($url =~ m-^(/[^/]+/[^/]+)/([^/]+)$-) {
  249:         $cid = $1;
  250:         $sec = $2;
  251:     } else {
  252:         $cid = $url;
  253:     }
  254:     my $courseid = $cid;
  255:     $courseid =~ s|^/||;
  256:     $courseid =~ s|/|_|;
  257:     my %crshash=&Apache::lonnet::coursedescription($cid);
  258:     $cdom = $crshash{'domain'};
  259:     $cnum = $crshash{'num'};
  260:     if (defined($cdom) && defined($cnum)) {
  261:         my %settings;
  262:         my @changegroups = ();
  263:         my %dropgroup = ();
  264:         my %dropstart = ();
  265:         my %addgroup = ();
  266:         my %curr_groups = &coursegroups($cdom,$cnum);
  267:         if (%curr_groups) {
  268:             foreach my $group (keys(%curr_groups)) {
  269:                 %{$settings{$group}}=&get_group_settings($curr_groups{$group});
  270:                 if ($chgtype eq 'add') {
  271:                     if (!($settings{$group}{autoadd} eq 'on')) {
  272:                         next;
  273:                     }
  274:                 } else {
  275:                     if (!($settings{$group}{autodrop} eq 'on')) {
  276:                         next;
  277:                     }
  278:                 }
  279:                 my @autosec = ();
  280:                 if (ref($settings{$group}{'autosec'}{$role}) eq 'ARRAY') {
  281:                     @autosec = @{$settings{$group}{'autosec'}{$role}};
  282:                 }
  283:                 if ($sec eq '') {
  284:                     $sec = 'none';
  285:                 }
  286:                 if ((grep(/^$sec$/,@autosec)) || (grep(/^all$/,@autosec))) {
  287:                     push(@changegroups,$group);
  288:                 }
  289:             }
  290:         }
  291:        if (@changegroups > 0) {
  292:             my %currpriv;
  293:             my %roleshash = &Apache::lonnet::dump('roles',$udom,$uname,$cid);
  294: 	    if (my $tmp = &Apache::lonnet::error(%roleshash)) {
  295:                 &Apache::lonnet::logthis('Error retrieving roles: '.$tmp.
  296:                                          ' for '.$uname.':'.$udom);
  297:             } else {
  298:                 my $group_privs = '';
  299:                 foreach my $group (@changegroups) {
  300:                     if ($chgtype eq 'add') {
  301:                         if (ref($settings{$group}{'defpriv'}) eq 'ARRAY') {
  302:                             $group_privs =
  303:                                   join(':',@{$settings{$group}{'defpriv'}});
  304:                         }
  305:                     }
  306:                     my $key = $cid.'/'.$group.'_gr';
  307:                     if (defined($roleshash{$key})) {
  308:                         if ($roleshash{$key}=~ /^gr\/([^_]*)_(\d+)_([\-\d]+)$/) {
  309:                             my $grpstart = $3;
  310:                             my $grpend = $2;
  311:                             $currpriv{$group} = $1;
  312:                             if ($chgtype eq 'drop') {
  313:                                 if ($grpstart == -1) { next; } # deleted
  314:                                 if ($grpend == 0 || $grpend > $now) {
  315:                                     if (!defined($dropgroup{$group})) {
  316:                                         $dropstart{$group} = $grpstart;
  317:                                         if ($grpstart > $now) {
  318:                                             $dropstart{$group} = $now;
  319:                                         }
  320:                                         $dropgroup{$group} = $now.':'.
  321:                                                             $dropstart{$group}.
  322:                                                          ':'.$currpriv{$group};
  323:                                     }
  324:                                 }
  325:                             } elsif ($chgtype eq 'add') {
  326:                                 if (($grpstart == -1) || ($grpend > 0 &&
  327:                                      ($grpend < $settings{$group}{'enddate'} ||
  328:                                       $settings{$group}{'enddate'} == 0)) ||
  329:                                      ($grpstart > $settings{$group}{'startdate'})) {
  330:                                     if (!defined($addgroup{$group})) {
  331:                                         $addgroup{$group} =
  332:                                             $settings{$group}{'enddate'}.':'.
  333:                                             $settings{$group}{'startdate'}.':'.
  334:                                             $group_privs;
  335:                                     }
  336:                                 }
  337:                             }
  338:                         }
  339:                     } elsif ($chgtype eq 'add') {
  340:                         $addgroup{$group} = $settings{$group}{'enddate'}.':'.
  341:                                             $settings{$group}{'startdate'}.':'.
  342:                                             $group_privs;
  343:                     }
  344:                 }
  345:                 if ($chgtype eq 'add') {
  346:                     foreach my $add (keys(%addgroup)) {
  347:                         if (&Apache::lonnet::modify_group_roles($cdom,$cnum,
  348:                                                   $add,$uname.':'.$udom,
  349:                                                   $settings{$add}{'enddate'},
  350:                                                   $settings{$add}{'startdate'},
  351:                                                   $group_privs,$selfenroll,$context) eq 'ok') {
  352:                             my %usersettings;
  353:                             $usersettings{$add.':'.$uname.':'.$udom} =
  354:                                                                $addgroup{$add};
  355:                             my $roster_result =
  356:                                &Apache::lonnet::modify_coursegroup_membership(
  357:                                                    $cdom,$cnum,\%usersettings);
  358:                         }
  359:                     }
  360:                 } elsif ($chgtype eq 'drop') {
  361:                     foreach my $drop (keys(%dropgroup)) {
  362:                         my $nodrop = 0;
  363:                         if ($settings{$drop}{'autoadd'} eq 'on') {
  364:                             foreach my $urole (keys(%{$settings{$drop}{'autosec'}})) {
  365:                                 if ($nodrop) {
  366:                                     last;
  367:                                 } else {
  368:                                     my @autosec = ();
  369:                                     if (ref($settings{$drop}{'autosec'}{$urole}) eq 'ARRAY') {
  370:                                         @autosec = @{$settings{$drop}{'autosec'}{$urole}};
  371:                                     }
  372:                                     foreach my $usec (@autosec) {
  373:                                         if ($usec eq 'all') {
  374:                                             foreach my $ukey (keys(%roleshash)) {
  375:                                                 if ($ukey =~ /^\Q$cid\E(\/?\w*)_($urole)$/) {
  376:                                                     if ($sec ne $1) {
  377:                                                         if ($roleshash{$ukey} =~ /_?(\d*)_?([\-\d]*)$/) {
  378:                                                             my $roleend = $1;
  379:                                                             if ((!$roleend) ||
  380:                                                                 ($roleend > $now)) {
  381:                                                                 $nodrop = 1;
  382:                                                                 last;
  383:                                                             }
  384:                                                         }
  385:                                                     }
  386:                                                 }
  387:                                             }
  388:                                         } else {
  389:                                             my $ukey = $cid.'/'.$usec.'_'.$urole;
  390:                                             if ($usec eq 'none') {
  391:                                                 if ($sec eq '') {
  392:                                                     next;
  393:                                                 }
  394:                                             } else {
  395:                                                 if ($usec eq $sec) {
  396:                                                     next;
  397:                                                 }
  398:                                             }
  399:                                             if (exists($roleshash{$ukey})) {
  400:                                                 if ($roleshash{$ukey} =~
  401:                                                        /_?(\d*)_?([\-\d]*)$/) {
  402:                                                     my $roleend = $1;
  403:                                                     if ((!$roleend) ||
  404:                                                         ($roleend > $now)) {
  405:                                                         $nodrop = 1;
  406:                                                         last;
  407:                                                     }
  408:                                                 }
  409:                                             }
  410:                                         }
  411:                                     }
  412:                                 }
  413:                             }
  414:                         }
  415:                         if (!$nodrop) {
  416:                             if (&Apache::lonnet::modify_group_roles($cdom,
  417:                                                          $cnum,$drop,
  418:                                                          $uname.':'.$udom,$now,
  419:                                                          $dropstart{$drop},
  420:                                                          $currpriv{$drop},
  421:                                                          $selfenroll,$context) 
  422:                                                                      eq 'ok') {
  423:                                 my %usersettings;
  424:                                 $usersettings{$drop.':'.$uname.':'.$udom} =
  425:                                                              $dropgroup{$drop};
  426:                                 my $roster_result =
  427:                                 &Apache::lonnet::modify_coursegroup_membership(
  428:                                                    $cdom,$cnum,\%usersettings);
  429:                             }
  430:                         }
  431:                     }
  432:                 }
  433:             }
  434:         }
  435:     }
  436:     return;
  437: }
  438: 
  439: ###############################################
  440: 
  441: sub get_fixed_privs {
  442:     my $fixedprivs = {
  443:                       email          => {sgm => 1},
  444:                       discussion     => {vgb => 1},
  445:                       chat           => {pgc => 1},
  446:                       files          => {rgf => 1},
  447:                       roster         => {vgm => 1},
  448:                       homepage       => {vgh => 1},
  449:                      };
  450:     return $fixedprivs;
  451: }
  452: 
  453: ###############################################
  454: 
  455: sub get_tool_privs {
  456:     my ($gpterm) = @_;
  457:     my $toolprivs = {
  458:         email    => {
  459:             sgm => 'Send '.$gpterm.' message',
  460:             sgb => 'Broadcast message',
  461:         },
  462:         discussion => {
  463:             cgb => 'Create boards',
  464:             pgd => 'Post',
  465:             egp => 'Edit own posts',
  466:             dgp => 'Hide/Delete any post',
  467:             vgb => 'View boards',
  468:         },
  469:         chat       => {
  470:             pgc => 'Chat Room',
  471:         },
  472:         files      => {
  473:             rgf => 'Retrieve',
  474:             ugf => 'Upload',
  475:             mgf => 'Modify',
  476:             dgf => 'Delete',
  477:             agf => 'Control Access',
  478:         },
  479:         roster     => {
  480:             vgm => 'Basic Display',
  481:             vmd => 'Detailed Display',
  482:         },
  483:         homepage   => {
  484:             vgh => 'View page',
  485:             mgh => 'Modify page',
  486:         },
  487:     };
  488:     return $toolprivs;
  489: }
  490: 
  491: ###############################################
  492: 
  493: 
  494: sub group_memberlist {
  495:     my ($cdom,$cnum,$groupname,$fixedprivs,$available) = @_;
  496:     my %membership = &Apache::lonnet::get_group_membership($cdom,$cnum,
  497:                                                            $groupname);
  498:     my %current = ();
  499:     my $hastools = 0;
  500:     my $addtools = 0;
  501:     my %member_nums = (
  502:                         'previous' => 0,
  503:                         'future' => 0,
  504:                         'active' => 0,
  505:                       );
  506:     my $now = time;
  507:     if (keys(%membership) > 0) {
  508:         my %allnames = ();
  509:         foreach my $key (sort(keys(%membership))) {
  510:             if ($key =~ /^\Q$groupname\E:([^:]+):([^:]+)$/) {
  511:                 my $uname = $1;
  512:                 my $udom = $2;
  513:                 my $user = $uname.':'.$udom;
  514:                 my($end,$start,@userprivs) = split(/:/,$membership{$key});
  515:                 unless ($start == -1) {
  516:                     $allnames{$udom}{$uname} = 1;
  517:                     $current{$user} = {
  518:                         uname     => $uname,
  519:                         udom      => $udom,
  520:                         start     => &Apache::lonlocal::locallocaltime($start),
  521:                         currtools => [],
  522:                         newtools  => [],
  523:                         privs     => \@userprivs,
  524:                     };
  525: 
  526:                     if ($end == 0) {
  527:                         $current{$user}{end} =  'No end date';
  528:                     } else {
  529:                         $current{$user}{end} =
  530:                                      &Apache::lonlocal::locallocaltime($end);
  531:                     }
  532:                     my $now = time;
  533:                     if (($end > 0) && ($end < $now)) {
  534:                         $current{$user}{changestate} = 'reenable';
  535:                         $current{$user}{'status'} = 'previous';
  536:                         $member_nums{'previous'} ++;
  537:                     } elsif (($start > $now)) {
  538:                         $current{$user}{changestate} = 'activate';
  539:                         $current{$user}{'status'} = 'future';
  540:                         $member_nums{'future'} ++;
  541:                     } else {
  542:                         $current{$user}{changestate} = 'expire';
  543:                         $current{$user}{'status'} = 'active';
  544:                         $member_nums{'active'} ++;
  545:                     }
  546:                     if ((@userprivs > 0) && (ref($fixedprivs) eq 'HASH')) {
  547:                         foreach my $tool (sort(keys(%{$fixedprivs}))) {
  548:                             foreach my $priv (keys(%{$$fixedprivs{$tool}})) {
  549:                                 if (grep/^$priv$/,@userprivs) {
  550:                                     push(@{$current{$user}{currtools}},$tool);
  551:                                     last;
  552:                                 }
  553:                             }
  554:                         }
  555:                         $hastools = 1;
  556:                     }
  557:                     if ((ref($available) eq 'ARRAY') && (@{$available} > 0)) {
  558:                         if (@{$current{$user}{currtools}} > 0) {
  559:                             if ("@{$available}" ne "@{$current{$user}{currtools}}") {
  560:                                 foreach my $tool (@{$available}) {
  561:                                     unless (grep/^$tool$/,@{$current{$user}{currtools}}) {
  562:                                         push(@{$current{$user}{newtools}},$tool);                                    }
  563:                                 }
  564:                             }
  565:                         } else {
  566:                             @{$current{$user}{newtools}} = @{$available};
  567: 
  568:                         }
  569:                         if (@{$current{$user}{newtools}} > 0) {
  570:                             $addtools = 1;
  571:                         }
  572:                     }
  573:                 }
  574:             }
  575:         }
  576:         if (keys(%current) > 0) {
  577:             my %idhash;
  578:             foreach my $udom (keys(%allnames)) {
  579:                 %{$idhash{$udom}} = &Apache::lonnet::idrget($udom,
  580:                                                 keys(%{$allnames{$udom}}));
  581:                 foreach my $uname (keys(%{$idhash{$udom}})) {
  582:                     $current{$uname.':'.$udom}{'id'} = $idhash{$udom}{$uname};
  583:                 }
  584:                 foreach my $uname (keys(%{$allnames{$udom}})) {
  585:                     $current{$uname.':'.$udom}{'fullname'} =
  586:                                 &Apache::loncommon::plainname($uname,$udom,
  587:                                                                   'lastname');
  588:                 }
  589:             }
  590:         }
  591:     }
  592:     return (\%current,\%member_nums,$hastools,$addtools);
  593: }
  594: 
  595: ###############################################
  596: 
  597: sub sum_quotas {
  598:     my ($courseid) = @_;
  599:     my $totalquotas = 0;
  600:     my ($cdom,$cnum);
  601:     if (!defined($courseid)) {
  602:         if (defined($env{'request.course.id'})) {
  603:             $courseid = $env{'request.course.id'};
  604:             $cdom = $env{'course.'.$courseid.'.domain'};
  605:             $cnum = $env{'course.'.$courseid.'.num'};
  606:         } else {
  607:             return '';
  608:         }
  609:     } else {
  610:         ($cdom,$cnum) = split(/_/,$courseid);
  611:     }
  612:     if ($cdom && $cnum) {
  613:         my %curr_groups = &coursegroups($cdom,$cnum);
  614:         if (%curr_groups) {
  615:             foreach my $group (keys(%curr_groups)) {
  616:                 my %settings=&get_group_settings($curr_groups{$group});
  617:                 my $quota = $settings{'quota'};
  618:                 if ($quota eq '') {
  619:                     $quota = 0;
  620:                 }
  621:                 $totalquotas += $quota; 
  622:             }
  623:         } else {
  624:             return 0;
  625:         }
  626:     } else {
  627:         return '';
  628:     }
  629:     return $totalquotas;
  630: }
  631: 
  632: ###############################################
  633: 
  634: sub get_bbfolder_url {
  635:     my ($cdom,$cnum,$group) = @_;
  636:     my %curr_groups = &coursegroups($cdom,$cnum,$group);
  637:     my $grpbbmap;
  638:     if (%curr_groups) {
  639:         my $crspath = '/uploaded/'.$cdom.'/'.$cnum.'/';
  640:         $grpbbmap = $crspath.'group_boards_'.$group.'.sequence';
  641:     }
  642:     return $grpbbmap;
  643: }
  644: 
  645: ###############################################
  646: 
  647: sub get_group_bbinfo {
  648:     my ($cdom,$cnum,$group,$boardurl) = @_;
  649:     my @groupboards = ();
  650:     my %boardshash = ();
  651:     my $navmap = Apache::lonnavmaps::navmap->new();
  652:     if (defined($navmap)) {
  653:         my $grpbbmap = &get_bbfolder_url($cdom,$cnum,$group);
  654:         if ($grpbbmap) {
  655:             my $bbfolderres = $navmap->getResourceByUrl($grpbbmap);
  656:             if ($bbfolderres) {
  657:                 my @boards = $navmap->retrieveResources($bbfolderres,undef,0,0);
  658:                 foreach my $res (@boards) {
  659:                     my $url = $res->src();
  660:                     if ($url =~ m|^(/adm/\Q$cdom\E/\Q$cnum\E/\d+/bulletinboard)|) {
  661:                         if ($boardurl) {
  662:                             if ($boardurl =~ /^\Q$1\E/) {
  663:                                 push(@groupboards,$res->symb());
  664:                                 $boardshash{$res->symb()} = {
  665:                                                         title => $res->title(),
  666:                                                         url   => $res->src(),
  667:                                                             };
  668:                                 last;
  669:                             }
  670:                         } else {
  671:                             push(@groupboards,$res->symb());
  672:                             $boardshash{$res->symb()} = {
  673:                                                       title => $res->title(),
  674:                                                       url   => $res->src(),
  675:                                                         };
  676:                         }
  677:                     }
  678:                 }
  679:             }
  680:         }
  681:         undef($navmap);
  682:     } else {
  683:         &Apache::lonnet::logthis('Retrieval of group boards failed - could not create navmap object for group: '.$group.' in course: '.$cdom.':'.$cnum);
  684:     }
  685:     return (\@groupboards,\%boardshash);
  686: }
  687: 
  688: ###############################################
  689: 
  690: 1;
  691: