File:  [LON-CAPA] / loncom / interface / lonwhatsnew.pm
Revision 1.73: download - view: text, annotated - select for diffs
Wed Sep 26 12:34:19 2007 UTC (16 years, 7 months ago) by raeburn
Branches: MAIN
CVS tags: version_2_6_2, version_2_6_1, version_2_6_0, version_2_5_99_1, version_2_5_99_0, HEAD
lonwhatsnew.pm
- xhtml
- remove surplus table tags
- more CSS

loncommon.pm
- IE 7 needs border-collapse: collapse
- Full page two column format added to standard_css

    1: #
    2: # $Id: lonwhatsnew.pm,v 1.73 2007/09/26 12:34:19 raeburn Exp $
    3: #
    4: # Copyright Michigan State University Board of Trustees
    5: #
    6: # This file is part of the LearningOnline Network with CAPA (LON-CAPA).
    7: #
    8: # LON-CAPA is free software; you can redistribute it and/or modify
    9: # it under the terms of the GNU General Public License as published by
   10: # the Free Software Foundation; either version 2 of the License, or
   11: # (at your option) any later version.
   12: #
   13: # LON-CAPA is distributed in the hope that it will be useful,
   14: # but WITHOUT ANY WARRANTY; without even the implied warranty of
   15: # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   16: # GNU General Public License for more details.
   17: #
   18: # You should have received a copy of the GNU General Public License
   19: # along with LON-CAPA; if not, write to the Free Software
   20: # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
   21: #
   22: # /home/httpd/html/adm/gpl.txt
   23: #
   24: # http://www.lon-capa.org/
   25: #
   26: 
   27: 
   28: package Apache::lonwhatsnew;
   29: 
   30: use strict;
   31: use lib qw(/home/httpd/lib/perl);
   32: use Apache::lonnet;
   33: use Apache::loncommon();
   34: use Apache::lonhtmlcommon();
   35: use Apache::lonlocal;
   36: use Apache::loncoursedata();
   37: use Apache::lonnavmaps();
   38: use Apache::lonuserstate;
   39: use Apache::Constants qw(:common :http);
   40: use Time::Local;
   41: use GDBM_File;
   42: use lib '/home/httpd/lib/perl/';
   43: use LONCAPA;
   44: 
   45: #----------------------------
   46: # handler
   47: #
   48: #----------------------------
   49: 
   50: sub handler {
   51:     my $r = shift;
   52:     if ($r->header_only) {
   53:         &Apache::loncommon::content_type($r,'text/html');
   54:         $r->send_http_header;
   55:         return OK;
   56:     }
   57:     &Apache::loncommon::get_unprocessed_cgi(
   58:                                    $ENV{'QUERY_STRING'},['command','refpage']);
   59: 
   60:     my $command = $env{'form.command'};
   61:     my $refpage = $env{'form.refpage'};
   62: 
   63:     my %checkallowed = ( coursenormalmail => 1,
   64: 			 coursecritmail => 1, );
   65:     foreach my $perm_check (['whn','whatsnew',1],
   66: 			    ['pch','coursediscussion',1],
   67: 			    ['mgr','handgrading',1],
   68: 			    ['vgr','abovethreshold',1],
   69: 			    ['opa','haserrors',1],
   70: 			    ['mdc','versionchanges',0],
   71: 			    ) {
   72: 	my ($perm,$key,$check_section) = @{ $perm_check };
   73: 	my $scope = $env{'request.course.id'};
   74: 	if (!($checkallowed{$key} = &Apache::lonnet::allowed($perm,$scope))) {
   75: 	    $scope .= '/'.$env{'request.course.sec'};
   76: 	    if ( $check_section ) {
   77: 		$checkallowed{$key} = &Apache::lonnet::allowed($perm,$scope);
   78: 	    }
   79: 	    if ($checkallowed{$key}) {
   80: 		$checkallowed{$key.'_section'} = $env{'request.course.sec'};
   81: 	    }
   82: 	}
   83:     }
   84: 
   85:     if ( ! $env{'request.course.fn'} || ! $checkallowed{'whatsnew'}) {
   86:         # Not in a course, or no whn priv in course
   87:         $env{'user.error.msg'}="/adm/whatsnew::whn:0:0:Cannot display what's new page";
   88:         return HTTP_NOT_ACCEPTABLE;
   89:     }
   90: 
   91:     &Apache::loncommon::content_type($r,'text/html');
   92:     $r->send_http_header;
   93: 
   94:     $r->print(&display_header($command,\%checkallowed));
   95: 
   96:     &Apache::lonhtmlcommon::clear_breadcrumbs();
   97:     &Apache::lonhtmlcommon::add_breadcrumb
   98:             ({href=>'/adm/whatsnew',
   99:               text=>"Display Action Items"});
  100:     if (($command eq 'chgthreshold') && $checkallowed{'abovethreshold'}) {
  101:         &Apache::lonhtmlcommon::add_breadcrumb
  102:             ({href=>'/adm/whatsnew?command=chgthreshold&refpage='.$refpage,
  103:               text=>"Change thresholds"});
  104:         $r->print(&Apache::lonhtmlcommon::breadcrumbs
  105:             ("What's New?",#'Course_Action_Items_Thresholds'
  106: 	     ));
  107:     } elsif (($command eq 'chginterval') && $checkallowed{'versionchanges'} ) {
  108:         &Apache::lonhtmlcommon::add_breadcrumb
  109:             ({href=>'/adm/whatsnew?command=chginterval&refpage='.$refpage,
  110:               text=>"Change interval"});
  111:         $r->print(&Apache::lonhtmlcommon::breadcrumbs
  112:             ("What's New?",#'Course_Action_Items_Intervals'
  113: 	     ));
  114:     } elsif (($command eq 'chgdisc') && $checkallowed{'coursediscussion'}) {
  115:         &Apache::lonhtmlcommon::add_breadcrumb
  116:             ({href=>'/adm/whatsnew?command=chgdisc&refpage='.$refpage,
  117:               text=>"Change discussion display"});
  118:         $r->print(&Apache::lonhtmlcommon::breadcrumbs
  119:             ("What's New?",#'Course_Action_Items_Intervals'
  120: 	     ));
  121:     } elsif ($command eq 'courseinit') {
  122:         &Apache::lonhtmlcommon::add_breadcrumb
  123:             ({href=>'/adm/whatsnew?command=courseinit&refpage='.$refpage,
  124:               text=>"Course initialization preference"});
  125:         $r->print(&Apache::lonhtmlcommon::breadcrumbs
  126:             ("What's New?",#'Course_Action_Items_Initialization'
  127: 	     ));
  128:     } else {
  129:         $r->print(&Apache::lonhtmlcommon::breadcrumbs
  130:             ("What's New?",#'Course_Action_Items_Display'
  131: 	     ));
  132:     }
  133:     &display_main_box($r,$command,$refpage,\%checkallowed);
  134:     return OK;
  135: }
  136: 
  137: #------------------------------
  138: # display_main_box
  139: #
  140: # Display all the elements within the main box
  141: #------------------------------
  142:                                                                                 
  143: sub display_main_box {
  144:     my ($r,$command,$refpage,$checkallowed) = @_;
  145:     my $domain=&Apache::loncommon::determinedomain();
  146:     my $function = &Apache::loncommon::get_users_function();
  147:     my $lctype = lc(&Apache::loncommon::course_type());
  148:     $r->print('<table width="100%" border="0" cellpadding="5" cellspacing="0"><tr><td width="100%">');
  149: 
  150:     my %threshold_titles = &Apache::lonlocal::texthash (
  151:                          av_attempts => 'Average number of attempts',
  152:                          degdiff => 'Degree of difficulty',
  153:                          numstudents => 'Total number of students with submissions',
  154:     );
  155: 
  156:     my %interval_titles = &Apache::lonlocal::texthash (
  157:                             -1 => "since start of $lctype",
  158:                        2592000 => 'since last month',
  159:                         604800 => 'since last week',
  160:                          86400 => 'since yesterday',
  161:     );
  162: 
  163:     my %initpage = &Apache::lonlocal::texthash (
  164:                      firstres => "first resource in the $lctype",
  165:                      whatsnew => "what's new? page",
  166:                      userpref => 'your general user preferences',
  167:                      coursespecific => "specific setting for this $lctype",
  168:                    );
  169:     my $cdom = $env{'course.'.$env{'request.course.id'}.'.domain'};
  170:     my $crs = $env{'course.'.$env{'request.course.id'}.'.num'};
  171: 
  172:     if (($command eq 'chgthreshold') 
  173: 	&& $checkallowed->{'abovethreshold'}) {
  174:         &display_threshold_config($r,$refpage,\%threshold_titles,
  175:                                                                    $cdom,$crs);
  176:     } elsif (($command eq 'chginterval') 
  177: 	     && $checkallowed->{'versionchanges'}) {
  178:         &display_interval_config($r,$refpage,\%interval_titles);
  179:     } elsif (($command eq 'chgdisc') 
  180: 	     && $checkallowed->{'coursediscussion'}) {
  181:         &display_discussion_config($r,$refpage);
  182:     } elsif ($command eq 'courseinit') {
  183:         &courseinit_config($r,$refpage,\%initpage);
  184:     } else {
  185:         &display_actions_box($r,$command,$refpage,\%threshold_titles,
  186:                         \%interval_titles,\%initpage,$cdom,$crs,$checkallowed);
  187:     }
  188:     my $end_page = &Apache::loncommon::end_page();
  189:     $r->print(<<END_OF_BLOCK);
  190:   </td>
  191:  </tr>
  192: </table><br />
  193: $end_page
  194: END_OF_BLOCK
  195: }
  196: 
  197: #-------------------------------
  198: # display_header
  199: #
  200: # Display the header information and set
  201: # up the HTML
  202: #-------------------------------
  203: 
  204: sub display_header {
  205:     my ($command,$checkallowed) = @_;
  206:     
  207:     my $scripttag;
  208:     unless ($command eq 'chgthreshold' || $command eq 'chginterval') {
  209:        $scripttag = <<"END";
  210: <script type="text/javascript">
  211: function change_display(caller,change) {
  212:     caller.value = change;
  213:     document.visible.submit(); 
  214: }
  215: 
  216: function changeAll(change) {
  217: END
  218:         foreach my $item (keys(%{$checkallowed})) {
  219: 	    if ($item =~ /_section$/) { next; }
  220:             if ($$checkallowed{$item}) {
  221:                 $scripttag.='document.visible.display_'.$item.'.value=change'.
  222:                             "\n";
  223:             }
  224:         }
  225:         $scripttag.='document.visible.submit();
  226: }
  227: </script>
  228: ';
  229:     }
  230:     my $course_type=&Apache::loncommon::course_type();
  231:     return &Apache::loncommon::start_page($course_type.' Action Items',
  232: 					  $scripttag);
  233: }
  234: 
  235: #-------------------------------
  236: # display_actions_box
  237: #
  238: # Display the action items
  239: #
  240: #-------------------------------
  241:                                                                                 
  242: sub display_actions_box {
  243:     my ($r,$command,$refpage,$threshold_titles,$interval_titles,$initpage,
  244:         $cdom,$crs,$checkallowed) = @_;
  245:     my $udom = $env{'user.domain'};
  246:     my $uname = $env{'user.name'};
  247:     my $cid = $env{'request.course.id'};
  248:     my $crstype = &Apache::loncommon::course_type();
  249:     my $lctype = lc($crstype);
  250:     my %stulabel = (
  251:                     'Course' => 'students',
  252:                     'Group' => 'members',
  253:                    );
  254:     my %lt = &Apache::lonlocal::texthash(
  255:                  'yacc' => 'You are accessing an invalid course',
  256:                  'gtfr' => 'Go to first resource',
  257:                  'hial' => 'Hide all',
  258:                  'shal' => 'Show all',
  259:     );
  260: 
  261:     my %unread = ();
  262:     my %ungraded = ();
  263:     my %bombed = ();
  264:     my %triggered = ();
  265:     my %changed = ();
  266:     my @newmsgs = ();
  267:     my @critmsgs = ();
  268:     my @newdiscussions = ();
  269:     my @tograde = ();
  270:     my @bombs = ();
  271:     my @warnings = ();
  272:     my $msgcount = 0;
  273:     my $critmsgcount = 0;
  274: 
  275:     my %res_title = ();
  276:     my %show = ();
  277:     my $needitems = 0;
  278:     my $boxcount = 0;
  279: 
  280:     my $result;
  281:     if ($command eq 'newcourseinit') {
  282:         $result = &store_courseinit_setting($uname,$udom,$cid,$initpage);
  283:     }
  284: 
  285:     my %threshold = ();
  286:     my %pagedesc = &Apache::lonlocal::texthash (
  287:                      firstres => 'First resource',
  288:                      whatsnew => "What's New? page",
  289:                      userpref => 'user preference',
  290:                      coursespecific => $lctype.' only',
  291:                      default => 'default',
  292:                    );
  293: 
  294:     my ($initcontrol,$initdisp) = &curr_courseinit();
  295:     my $currinit = $pagedesc{$initdisp}.' ('.$pagedesc{$initcontrol}.')';
  296: 
  297:     unless ($cid) {
  298:         $r->print('<p><span style="text-align: center; font-weight: bold;">'.$lt{'yacc'}.'</span></p>');
  299:         return;
  300:     }
  301: 
  302:     if ($refpage eq 'start') {
  303:         if (tie(my %bighash,'GDBM_File',$env{'request.course.fn'}.'.db',
  304:             &GDBM_READER(),0640)) {
  305:             my $furl=$bighash{'first_url'};
  306:             untie(%bighash);
  307:             $r->print('<span style="font-size: larger;"><a href="'.$furl.'">'.$lt{'gtfr'}.
  308:                   '</a></span><br />');
  309:         }
  310:     }
  311:     $r->print(&mt('Page set to be displayed after you have selected a role in this '.$lctype).
  312:               '. <span class="LC_nobreak">'.&mt('Currently: <i>[_1]</i>',$currinit).'.&nbsp;&nbsp;'.
  313:               &mt('<b>Change</b> for just <a href="/adm/whatsnew?command=courseinit&amp;refpage=[_1]">this '.$lctype.'</a>',$refpage).' '.
  314:               &mt('or for all <a href="/adm/preferences?action=changecourseinit&amp;refpage=[_1]">your courses</a>.',$refpage).'</span><br /><hr />');
  315: 
  316:     if ($command eq 'reset') {
  317:         $result = &process_reset($cdom,$crs);
  318:     } elsif ($command eq 'update') {
  319:         $result = &process_update($uname,$udom,$threshold_titles);
  320:     } elsif ($command eq 'newinterval') {
  321:         $result = &store_interval_setting($uname,$udom,$cid,$interval_titles);
  322:     } elsif ($command eq 'newdiscconf') {
  323:         $result = &store_discussion_setting($uname,$udom,$cid);
  324:     }
  325: 
  326:     my $store_result=&store_display_settings($uname,$udom,$cid,$checkallowed);
  327: 
  328:     unless ($store_result eq 'ok') { 
  329:         &Apache::lonnet::logthis('Error saving whatsnew settings: '.
  330:             $store_result.' for '.'user '.$uname.':'.$udom.' in '.$lctype.' '.$cid);
  331:         $result .= &mt('Unable to save visibility settings due to [_1]',
  332:                        $store_result); 
  333:     }
  334: 
  335:     if ($result) {
  336:         $r->print($result.'<hr width="100%" />');
  337:     }
  338:     $r->rflush();
  339: 
  340: 
  341:     my %display_settings = &get_display_settings($uname,$udom,$cid);
  342:     my $timediff = $display_settings{$cid.':interval'};
  343:     unless (defined($timediff)) { $timediff = 604800; } 
  344:     my $now = time;
  345:     my $interval = $$interval_titles{$timediff};
  346:     if ($timediff == -1) {
  347:         $timediff = time;
  348:     } 
  349:     my $starttime = $now - $timediff;
  350:     my $countunread = $display_settings{$cid.':countunread'};
  351:     unless (defined($countunread)) {
  352:         $countunread = 'on';
  353:     }
  354: 
  355:     my %headings = &Apache::lonlocal::texthash(
  356:                 coursediscussion =>  'Unread '.$lctype.' discussion posts',
  357:                 handgrading =>  'Problems requiring handgrading',
  358:                 haserrors => 'Problems with errors',
  359:                 versionchanges => 'Resources in '.$lctype.' with version changes '.$interval,
  360:                 coursenormalmail => 'New '.$lctype.' messages',
  361:                 coursecritmail => 'New critical messages in '.$lctype,
  362:     );
  363: 
  364:     if ($$checkallowed{'abovethreshold'}) {
  365:         &get_curr_thresholds(\%threshold,$uname,$udom,$cid,$cdom,$crs);
  366:     }
  367: 
  368:     $headings{'abovethreshold'} = 
  369: 	&mt('Problems with av. attempts &ge; [_1] or deg. difficulty &ge; [_2] <br /> and total number of '.$stulabel{$crstype}.' with submissions &ge; [_3]',
  370: 	    $threshold{'av_attempts'},$threshold{'degdiff'},
  371: 	    $threshold{'numstudents'});
  372: 
  373:     my @actionorder = ('handgrading','haserrors','abovethreshold','versionchanges','coursediscussion','coursenormalmail','coursecritmail');
  374: 
  375:     foreach my $key (keys(%{$checkallowed})) {
  376: 	if ($key =~ /_section$/) { next; }
  377:         $show{$key} = 0;
  378:         if ($$checkallowed{$key}) {
  379:             unless ($display_settings{$cid.':'.$key} eq 'hide') {
  380:                 $show{$key} = 1;
  381:             }
  382:         }
  383:     }
  384: 
  385:     foreach my $item (@actionorder) {
  386:         unless ($item eq 'coursenormalmail' || $item eq 'coursecritmail') {
  387:             if ($show{$item}) {
  388:                 $needitems = 1;
  389:                 last;
  390:             }
  391:         }
  392:     }
  393: 
  394:     if ($needitems) {
  395:         &getitems(\%unread,\%ungraded,\%bombed,\%triggered,\%changed,\@newdiscussions,\@tograde,\@bombs,\@warnings,\%threshold,$cdom,$crs,\%res_title,\%show,$starttime,$countunread);
  396:     }
  397:     if ($show{'coursenormalmail'}) {
  398:         $msgcount = &getnormalmail(\@newmsgs);
  399:     }
  400:     if ($show{'coursecritmail'}) {
  401:         $critmsgcount = &getcritmail(\@critmsgs);
  402:     }
  403: 
  404:     $r->print(qq|<a href="javascript:changeAll('hide');">$lt{'hial'}</a>
  405:      &nbsp;&nbsp;<a href="javascript:changeAll('show');">$lt{'shal'}</a>
  406:      <form method="post" name="visible" action="/adm/whatsnew">\n|);
  407:     foreach my $item (keys(%{$checkallowed})) {
  408: 	if ($item =~ /_section$/) { next; }
  409:         if ($$checkallowed{$item}) {
  410:             $r->print('<input type="hidden" name="display_'.$item.'" />'."\n");
  411:         }
  412:     }
  413: 
  414:     $r->print('<input type="hidden" name="refpage" value="'.$refpage.'" /></form><table class="LC_double_column"><tr><td class="LC_left_col">');
  415: 
  416:     my $displayed = 0;
  417:     my $totalboxes = 0;
  418:     foreach my $key (keys(%{$checkallowed})) {
  419: 	if ($key =~ /_section$/) { next; }
  420: 	if ($key eq 'whatsnew' ) { next; } # whatsnew check creates no box
  421:         if ($$checkallowed{$key}) {
  422:             $totalboxes ++;
  423:         }
  424:     }
  425:     my $halfway = int($totalboxes/2) + $totalboxes%2;
  426:     foreach my $actionitem (@actionorder) {
  427:         if ($$checkallowed{$actionitem}) {
  428:             if ($displayed == $halfway) {
  429:                 $r->print('</td><td>&nbsp;</td><td class="LC_right_col" >');
  430:             }
  431:             &display_launcher($r,$actionitem,$refpage,$checkallowed,\%show,\%headings,\%res_title,\@tograde,\%ungraded,\@bombs,\%bombed,\%changed,\@warnings,\%triggered,\@newdiscussions,\%unread,$msgcount,\@newmsgs,$critmsgcount,\@critmsgs,$interval,$countunread);
  432:             $displayed ++; 
  433:         }
  434:     }
  435:     $r->print('
  436:       </td>
  437:     </tr>
  438:    </table>
  439: ');
  440: }
  441: 
  442: #-------------------------------
  443: # display_threshold_config
  444: #
  445: # Display the threshold setting screen 
  446: #
  447: #-------------------------------
  448:                                                                                 
  449: sub display_threshold_config {
  450:     my ($r,$refpage,$threshold_titles,$cdom,$crs) = @_;
  451:     my $uname = $env{'user.name'};
  452:     my $udom = $env{'user.dom'};
  453:     my $cid = $env{'request.course.id'};
  454:     my %threshold = ();
  455:     my $rowColor1 = "#ffffff";
  456:     my $rowColor2 = "#eeeeee";
  457:     my $rowColor;
  458: 
  459:     my @thresholditems = ("av_attempts","degdiff","numstudents");
  460:     my %threshold_titles = &Apache::lonlocal::texthash(
  461:                          av_attempts => 'Average number of attempts',
  462:                          degdiff => 'Degree of difficulty',
  463:                          numstudents => 'Total number of students with submissions',
  464:                          );
  465:     &get_curr_thresholds(\%threshold,$uname,$udom,$cid,$cdom,$crs);
  466: 
  467:     $r->print('<br /><form name="thresholdform" method="post" action="/adm/whatsnew">'.
  468:               &Apache::loncommon::start_data_table().
  469:               &Apache::loncommon::start_data_table_header_row().
  470:              '<th>'.&mt('Threshold Name').'</th>'."\n".
  471:              '<th>'.&mt('Current value').'</th>'."\n".
  472:              '<th>'.&mt('Change?').'</th>'."\n".
  473:               &Apache::loncommon::end_data_table_header_row());
  474:     foreach my $type (@thresholditems) {
  475:         my $parameter = $env{'request.course.id'}.':threshold_'.$type;
  476: # onchange is javascript to automatically check the 'Set' button.
  477:         my $onchange = 'onFocus="javascript:window.document.forms'.
  478:               "['thresholdform'].elements['".$parameter."_setparmval']".
  479:               '.checked=true;"';
  480:         $r->print(&Apache::loncommon::start_data_table_row()."\n".
  481:                  '<td>'.$threshold_titles{$type}.'</td>'."\n".
  482:                  '<td>'.&Apache::lonhtmlcommon::textbox($parameter.'_value',
  483:                                             $threshold{$type},
  484:                                             10,$onchange).'</td>'."\n".
  485:                  '<td>'.
  486:                  &Apache::lonhtmlcommon::checkbox($parameter.'_setparmval').
  487:                  '</td>'."\n".
  488:                  &Apache::loncommon::end_data_table_row());
  489:     }
  490:     $r->print(&Apache::loncommon::end_data_table()."\n".
  491:           '<br /><input type="submit" name="threshold" value="Make changes" />
  492:                  <input type="hidden" name="command" value="update" />
  493:                  <input type="hidden" name="refpage" value="'.$refpage.'" />
  494:                </form>');
  495: }
  496: 
  497: #-------------------------------
  498: # display_interval_config
  499: #
  500: # Display the interval setting screen
  501: #
  502: #-------------------------------
  503:                                                                                    
  504: sub display_interval_config {
  505:     my ($r,$refpage,$interval_titles) = @_;
  506:     my $lctype = lc(&Apache::loncommon::course_type());
  507:     my $current = &get_current($env{'user.name'},$env{'user.domain'},
  508:                                 $env{'request.course.id'},'interval');
  509:     $r->print('<br />'.&mt('Choose the time window to use for display of version changes for resources in the '.$lctype.'.'));
  510:     unless ($current eq '') {
  511:         $r->print(' '.&mt('Current value is [_1]','<b>'.
  512:                   $$interval_titles{$current}.'</b>.'));
  513:     }
  514:     $r->print('<br /><br />
  515: <form method="post" name="intervalswitch" action="/adm/whatsnew">
  516: <input type="hidden" name="command" value="newinterval" />
  517: <input type="hidden" name="refpage" value="'.$refpage.'" />
  518: <select name="interval">
  519: ');
  520:     foreach my $key (reverse sort ({$a cmp $b} (keys(%{$interval_titles})))) {
  521:         $r->print('<option value="'.$key.'">'.&mt('Version changes').' '.$$interval_titles{$key}.
  522:                   '</option>'."\n");
  523:     }
  524:     $r->print('</select>&nbsp;&nbsp;
  525:                <input type="submit" name="display" value="'.
  526:                &mt('Change interval').'" /></form>');
  527:     return;
  528: }
  529: 
  530: #----------------------------------------------
  531: # display_discussion_config
  532: #
  533: # Display the discussion display setting screen
  534: #
  535: #----------------------------------------------
  536:                                                                                   
  537: sub display_discussion_config {
  538:     my ($r,$refpage) = @_;
  539:     my $current = &get_current($env{'user.name'},$env{'user.domain'},
  540:                                 $env{'request.course.id'},'countunread');
  541:     if ($current eq '') {
  542:         $current = 'on';
  543:     }
  544:     my %opposite = ( 
  545:                       'on' => 'off',
  546:                       'off' => 'on',
  547:                     );
  548:     $r->print('<script type="text/javascript">
  549: function toggle_countunread(choice) {
  550:     if (choice == "unchanged") {
  551:         document.discussionswitch.command.value = "";
  552:     }
  553:     document.discussionswitch.submit();
  554: }
  555: </script>');
  556:     $r->print('<br />'.&mt('Choose whether or not to display a count of the number of new posts for each resource or bulletin board which has unread posts.').'<br />'.&mt("This can increase the time taken to gather data for the '<i>What's New?</i>' page by a few seconds.").'&nbsp;&nbsp;'.&mt("Currently set to <b>$current</b>."));
  557:     $r->print('<br /><br />
  558: <form method="post" name="discussionswitch" action="/adm/whatsnew">
  559: <input type="hidden" name="command" value="newdiscconf" />
  560: <input type="hidden" name="refpage" value="'.$refpage.'" />
  561: <input type="hidden" name="countunread" value="'.$opposite{$current}.'" />
  562: ');
  563:     $r->print('<br/>
  564:                <input type="button" name="display" value="'.
  565:                &mt('Change to [_1]',$opposite{$current}).'" 
  566:                onclick="javascript:toggle_countunread('."'change'".')" />
  567:                &nbsp;&nbsp;&nbsp;&nbsp;&nbsp&nbsp;&nbsp;
  568:                <input type="button" name="nochange" value="'.
  569:                &mt("No change").'" 
  570:                onclick="javascript:toggle_countunread('."'unchanged'".')" />
  571:                </form>');
  572:     return;
  573: }
  574: 
  575: #---------------------------------------------------
  576: # courseinit_config
  577: #
  578: # Set page displayed when course loads after 
  579: # selecting a role in the course from the roles page. 
  580: #
  581: #---------------------------------------------------
  582: 
  583: sub courseinit_config {
  584:     my ($r,$refpage,$initpage) = @_;
  585:     my ($control,$current) = &curr_courseinit();
  586:     my @chgstate = ('userpref','coursespecific');
  587:     my @chgentry = ('firstres','whatsnew');
  588:     my $lctype = lc(&Apache::loncommon::course_type());
  589:     my %lt = &Apache::lonlocal::texthash(
  590:                              'chwp' => "Choose which page will be displayed when you enter this $lctype after selecting a role.",
  591:                              'cuva' => 'Current value is determined by',
  592:                              'anis' => 'and is set to display',
  593:                              'padc' => 'Page display controlled by',
  594:                              'chce' => 'Choose '.$lctype.' entry',
  595:                              'moce' => 'Modify '.$lctype.' entry',
  596:     );
  597:     $r->print(<<"END"); 
  598: <br />$lt{'chwp'}
  599: <br />$lt{'cuva'}: <b>
  600: $$initpage{$control}</b> $lt{'anis'} <b>
  601: $$initpage{$current}</b>.<br /><br />
  602: <form method="post" name="courseinitswitch" action="/adm/whatsnew">
  603: <input type="hidden" name="command" value="newcourseinit" />
  604: <input type="hidden" name="refpage" value="$refpage" />
  605: $lt{'padc'}:&nbsp;&nbsp;
  606: END
  607:     foreach my $choice (@chgstate) {
  608:         my $chkstring;
  609:         if ($choice eq $control) {
  610:             $chkstring = ' checked="checked" ';
  611:         }  
  612:         $r->print('<span class="LC_nobreak"><label><input type="radio" name="courseinit_control" value="'.
  613:                    $choice.'"'.$chkstring.'/>'.$$initpage{$choice}.
  614:                    '&nbsp;&nbsp;</label></span>');
  615:     }
  616:     $r->print('<br /><br />'.&mt('If').' '.$$initpage{'coursespecific'}.
  617:               ' - <br />'.$lt{'chce'}.": \n");
  618:     foreach my $choice (@chgentry) {
  619:         my $chkstring;
  620:         if (($choice eq $current) && ($control eq 'coursespecific')) {
  621:             $chkstring = ' checked="checked" ';
  622:         }
  623:         $r->print('<span class="LC_nobreak"><label><input type="radio" name="courseinit_page" value="'.
  624:                   $choice.'"'.$chkstring.'/>'.$$initpage{$choice}.
  625:                   '&nbsp;&nbsp;</label></span>');
  626:     }
  627:     $r->print('<br /><br /><input type="submit" name="display" value="'.
  628:                $lt{'moce'}.'" /></form>');
  629:     return;
  630: }
  631: 
  632: sub curr_courseinit {
  633:     my $current = &get_current($env{'user.name'},$env{'user.domain'},
  634:                                 $env{'request.course.id'},'courseinit');
  635:     my $control;
  636:     if ($current) {
  637:         $control = 'coursespecific';
  638:     } else {
  639:         $control = 'userpref';
  640:         my %userenv = &Apache::lonnet::get('environment',
  641:                                                       ['course_init_display']);
  642:         if (exists($userenv{'course_init_display'})) {
  643:             $current = $userenv{'course_init_display'};
  644:         }
  645:         unless ($current) {
  646:             $current = 'whatsnew';
  647:         }
  648:     }
  649:     return ($control,$current);
  650: }
  651: 
  652: sub display_launcher {
  653:     my ($r,$action,$refpage,$checkallowed,$show,$headings,$res_title,
  654:         $tograde,$ungraded,$bombs,$bombed,$changed,$warnings,$triggered,
  655:         $newdiscussions,$unread,$msgcount,$newmsgs,$critmsgcount,$critmsgs,
  656:         $interval,$countunread) = @_;
  657: 
  658:     if ($$checkallowed{$action}) {
  659:         &start_box($r,$show,$headings,$action,$refpage,$action);
  660:         if ($$show{$action}) {
  661:             if ($action eq 'handgrading') {    # UNGRADED ITEMS
  662:                 &display_handgrade($r,$tograde,$ungraded);
  663:             } elsif ($action eq 'haserrors') { # BOMBS
  664:                 &display_haserrors($r,$bombs,$bombed,$res_title);
  665:             } elsif ($action eq 'versionchanges') { # VERSION CHANGES
  666:                 &display_versionchanges($r,$changed,$res_title,$interval);
  667:             } elsif ($action eq 'abovethreshold') { # DEGDIFF/AV. TRIES TRIGGERS
  668:                 &display_abovethreshold($r,$refpage,$warnings,$triggered,
  669: 					$res_title);
  670:             } elsif ($action eq 'coursediscussion') { # UNREAD COURSE DISCUSSION
  671:                 &display_coursediscussion($r,$newdiscussions,$unread,
  672:                                 $countunread,$res_title);
  673:             } elsif ($action eq 'coursenormalmail') { # NORMAL MESSAGES
  674:                 &display_coursenormalmail($r,$msgcount,$newmsgs);
  675:             } elsif ($action eq 'coursecritmail') { # CRITICAL MESSAGES
  676:                 &display_coursecritmail($r,$critmsgcount,$critmsgs);
  677:             }
  678:         }
  679:         &end_box($r);
  680:     }
  681:     return;
  682: }
  683: 
  684: sub getitems {
  685:     my ($unread,$ungraded,$bombed,$triggered,$changed,$newdiscussions,
  686:         $tograde,$bombs,$warnings,$threshold,$cdom,$crs,$res_title,$show,
  687:         $starttime,$countunread) = @_;
  688:     my $navmap = Apache::lonnavmaps::navmap->new();
  689:     # force retrieve Resource to seed the part id cache we'll need it later
  690:     my @allres=$navmap->retrieveResources(undef,
  691:                      sub {if ($_[0]->is_problem) { $_[0]->parts();} return 1;});
  692:     my %resourcetracker;
  693:     my $discussiontime;
  694: 
  695: # Resource version changes
  696:     if ($$show{'versionchanges'}) {
  697:         &checkversions($cdom,$crs,$navmap,$changed,$starttime);
  698:     }
  699: 
  700:     if ($$show{'abovethreshold'}) {
  701:         %resourcetracker =  &Apache::lonnet::dump('nohist_resourcetracker',
  702:                                                                    $cdom,$crs);
  703:     }
  704: 
  705:     foreach my $resource (@allres) {
  706:         my $result = '';
  707:         my $applies = 0;
  708:         my $symb = $resource->symb();
  709:         %{$$bombed{$symb}} = ();
  710:         %{$$ungraded{$symb}} = ();
  711:         %{$$triggered{$symb}} = ();
  712:         $$triggered{$symb}{numparts} = 0;
  713:         if ($resource->encrypted()) {
  714:             $$triggered{$symb}{'enclink'} = $resource->link();
  715:             $$triggered{$symb}{'encsymb'} = $resource->shown_symb();
  716:         }
  717:         my $title = $resource->compTitle();
  718:         $$res_title{$symb} = $title;
  719:         my $ressymb = $resource->wrap_symb();
  720: 
  721: # Check if there are unread discussion postings
  722:         if ($$show{'coursediscussion'}) {
  723:             &check_discussions($resource,$symb,$ressymb,$title,
  724: 			       $newdiscussions,$unread,$countunread);
  725:         }
  726: 
  727: # Check for ungraded problems
  728:         if ($resource->is_problem()) {
  729:             if ($$show{'handgrading'}) {
  730:                 &check_handgraded($resource,$symb,$title,$cdom,$crs,$ungraded,
  731:                                                                      $tograde);
  732:             }
  733:         }
  734: 
  735: # Check for bombs
  736:         if ($$show{'haserrors'}) {
  737:             &check_bombed($resource,$symb,$title,$bombs,$bombed);
  738:         }
  739: 
  740: # Maxtries and degree of difficulty for problem parts, unless handgradeable
  741:         if ($$show{'abovethreshold'}) {  
  742:             &check_thresholds($resource,$symb,\%resourcetracker,
  743: 			      $triggered,$threshold,$warnings);
  744:         }
  745: 
  746:     }
  747: }
  748: 
  749: sub check_discussions {
  750:     my ($resource,$symb,$ressymb,$title,$newdiscussions,$unread,
  751: 	$countunread) = @_;
  752: 
  753:     if (!$resource->hasDiscussion()) { return; }
  754: 
  755:     %{$$unread{$ressymb}} = ();
  756:     $$unread{$ressymb}{'title'} = $title;
  757:     $$unread{$ressymb}{'symb'} = $symb;
  758:     if ($resource->encrypted()) {
  759:         $$unread{$ressymb}{'enclink'} = $resource->link();
  760:         $$unread{$ressymb}{'encsymb'} = $resource->shown_symb();
  761:     }
  762:     push(@{$newdiscussions}, $ressymb);
  763:     
  764:     $$unread{$ressymb}{'lastpost'} = $resource->last_post_time();
  765:     
  766:     if ($countunread eq 'on') {
  767: 	$$unread{$ressymb}{'unreadcount'} = 
  768:                             $resource->discussion_info('unread');
  769:     }
  770: }
  771: 
  772: sub check_handgraded {
  773:     my ($resource,$symb,$title,$cdom,$cnum,$ungraded,$tograde) = @_;
  774:     if ($resource->is_problem()) {
  775:         my ($map,$ind,$url)=&Apache::lonnet::decode_symb($symb);
  776:         my $partlist=$resource->parts();
  777:         my $handgradeable;
  778:         foreach my $part (@$partlist) {
  779:             if ($resource->handgrade($part) eq 'yes') {
  780:                 $handgradeable=1; last;
  781:             }
  782:         }
  783:         if ($handgradeable) {
  784:             my @ungraded = &Apache::bridgetask::get_queue_symb_status(
  785:                                              'gradingqueue',$symb,$cdom,$cnum);
  786:             if (@ungraded > 0) {
  787:                 $$ungraded{$symb}{count} = scalar(@ungraded);
  788:                 $$ungraded{$symb}{title} = $title;
  789:                 if ($resource->encrypted()) {
  790:                     $$ungraded{$symb}{'enclink'} = $resource->link();
  791:                     $$ungraded{$symb}{'encsymb'} = $resource->shown_symb();
  792:                 }
  793:                 push(@{$tograde},$symb);
  794:             }
  795:         }
  796:     }
  797: }
  798: 
  799: sub check_bombed {
  800:     my ($resource,$symb,$title,$bombs,$bombed) = @_;
  801:     if ($resource->getErrors()) {
  802:         my $errors = $resource->getErrors();
  803:         $errors =~ s/^,//;
  804:         my @bombs = split(/,/, $errors);
  805:         my $errorcount = scalar(@bombs);
  806:         my $errorlink = '<a href="/adm/email?display='.
  807:                         &escape($bombs[0]).'">'.
  808:                         $title.'</a>';
  809:         $$bombed{$symb}{errorcount} = $errorcount;
  810:         $$bombed{$symb}{errorlink} = $errorlink;
  811:         push(@{$bombs}, $symb);
  812:     }
  813: }
  814: 
  815: sub check_thresholds {
  816:     my ($resource,$symb,$resourcetracker,$triggered,$threshold,$warnings) = @_;
  817: # Compile maxtries and degree of difficulty for problem parts, unless handgradeable
  818:     my @parts = @{$resource->parts()};
  819:     my %stats;
  820:     my %lastreset = ();
  821:     my $warning = 0;
  822:     foreach my $part (@parts) {
  823:         if ($resource->handgrade($part) eq 'yes') {
  824:             next;
  825:         }
  826:         if ($resource->is_survey($part)) {
  827:             next;
  828:         }
  829:         %{$stats{$part}} = ();
  830:         my ($attempts,$users,$corrects,$degdiff,$av_attempts);
  831:         if (exists($$resourcetracker{$symb."\0".$part."\0attempts"})) {
  832:             $attempts = $$resourcetracker{$symb."\0".$part."\0attempts"};
  833:         }
  834:         if (exists($$resourcetracker{$symb."\0".$part."\0users"})) {
  835:             $users = $$resourcetracker{$symb."\0".$part."\0users"};
  836:         }
  837:         if (exists($$resourcetracker{$symb."\0".$part."\0correct"})) {
  838:             $corrects = $$resourcetracker{$symb."\0".$part."\0correct"};
  839:         }
  840:         if ($attempts > 0) {
  841:             $degdiff =  1 - ($corrects/$attempts);
  842:             $degdiff = sprintf("%.2f",$degdiff);
  843:         }
  844:         if ($users > 0) {
  845:             $av_attempts = $attempts/$users;
  846:             $av_attempts = sprintf("%.2f",$av_attempts);
  847:         }
  848:         if ((($degdiff ne '' && $degdiff >= $$threshold{'degdiff'}) || ($av_attempts ne '' && $av_attempts >= $$threshold{'av_attempts'})) && ($users >= $$threshold{'numstudents'})) {
  849:             $stats{$part}{degdiff} = $degdiff;
  850:             $stats{$part}{attempts} = $av_attempts;
  851:             $stats{$part}{users} = $users;
  852:             $lastreset{$part} = $$resourcetracker{$symb."\0".$part."\0resettime"};
  853:             if ($lastreset{$part}) {
  854:                 $lastreset{$part} = &Apache::lonnavmaps::timeToHumanString($lastreset{$part});
  855:             }
  856:             $warning = 1;
  857:         }
  858:     }
  859:     if ($warning) {
  860:         $$triggered{$symb}{title} = $resource->title;
  861:         my $partcount = 0;
  862:         @{$$triggered{$symb}{text}} = ();
  863:         foreach my $part (@parts) {
  864:             if (exists($stats{$part}{users})) {
  865:                 my $resetname = 'reset_'.&escape($symb."\0".$part);
  866:                 my $resettitle = 'title_'.&escape($symb."\0".$part);
  867:                 if (@parts > 1) {
  868:                     $$triggered{$symb}{text}[$partcount] = '
  869:                      <td>part - '.$part.'</td>';
  870:                 } else {
  871:                     $$triggered{$symb}{text}[$partcount] = '
  872:                      <td>single part</td>';
  873:                 }
  874:                 $$triggered{$symb}{text}[$partcount] .= '
  875:                      <td>'.$stats{$part}{users}.'</td>
  876:                      <td>'.$stats{$part}{attempts}.'</td>
  877:                      <td>'.$stats{$part}{degdiff}.'</td>
  878:                      <td>'.$lastreset{$part}.'</td>
  879:                      <td><input type="checkbox" name="'.$resetname.'" /><input type="hidden" name="'.$resettitle.'" value="'.&escape($$triggered{$symb}{title}).'" /></td>';
  880:                 $partcount ++;
  881:             }
  882:             $$triggered{$symb}{numparts} = $partcount;
  883:         }
  884:         push(@{$warnings},$symb);
  885:     }
  886: }
  887: 
  888: 
  889: sub get_curr_thresholds {
  890:     my ($threshold,$uname,$udom,$cid,$cdom,$crs) = @_;
  891:     # set default values
  892:     %$threshold = (av_attempts => 2,
  893:                   degdiff => 0.5,
  894:                   numstudents => 2
  895:                   );
  896:     my %thresholdsettings = &Apache::lonnet::dump('nohist_whatsnew',$udom,
  897:                                                      $uname,$cid.':threshold');
  898:     my $thresholdcount = 0;
  899:     my ($tmp) = %thresholdsettings;
  900:     unless ($tmp =~ /^(con_lost|error|no_such_host)/i) {
  901:         foreach my $item (keys %{$threshold}) { 
  902:             if (exists($thresholdsettings{$cid.':threshold_'.$item})) {
  903:                 $$threshold{$item} = 
  904:                              $thresholdsettings{$cid.':threshold_'.$item};
  905:                 $thresholdcount ++;
  906:             }
  907:         }
  908:     }
  909:     if ($thresholdcount == 3) {
  910:         return;
  911:     }
  912:     my %coursesettings = &Apache::lonnet::dump('environment',
  913:                                               $cdom,$crs,'internal.threshold');
  914:     my ($temp) = %coursesettings;
  915:     unless ($temp =~ /^(con_lost|error|no_such_host)/i) {  
  916:         foreach my $item (keys %{$threshold}) {
  917:             unless (exists($thresholdsettings{$cid.':threshold_'.$item})) {
  918:                 if (exists($coursesettings{'internal.threshold_'.$item})) {
  919:                     $$threshold{$item} = 
  920:                              $coursesettings{'internal.threshold_'.$item};
  921:                 }
  922:             }
  923:         }
  924:     }
  925:     return;
  926: }
  927: 
  928: sub get_current {
  929:     my ($uname,$udom,$cid,$caller) = @_;
  930:     my $currvalue;
  931:     my %settings = &Apache::lonnet::dump('nohist_whatsnew',$udom,$uname,$cid.
  932:                                                                 ':'.$caller);
  933:     my ($tmp) = %settings;
  934:     unless ($tmp =~ /^(con_lost|error|no_such_host)/i) {
  935:         $currvalue = $settings{$cid.':'.$caller};
  936:     }
  937:     return $currvalue;
  938: }
  939: 
  940: sub process_reset {
  941:     my ($dom,$crs) = @_;
  942:     my $result = '<b>'.&mt('Counters reset for following problems (and parts):').
  943:                            '</b><br />';
  944:     my @agg_types = ('attempts','users','correct');
  945:     my %agg_titles = &Apache::lonlocal::texthash (
  946:                      attempts => 'Number of submissions',
  947:                      users => 'Students with submissions',
  948:                      correct => 'Number of correct submissions',
  949:                      );
  950:     my @resets = ();
  951:     my %titles = ();
  952:     foreach my $key (keys(%env)) {
  953:         next if ($key !~ /^form\.reset_(.+)$/);
  954:         my $title = &unescape($env{'form.title_'.$1});
  955:         my $reset_item = &unescape($1);
  956:         my %curr_aggregates = &Apache::lonnet::dump('nohist_resourcetracker',$dom,$crs,$reset_item);
  957:         my %aggregates = ();
  958:         my ($symb,$part) = split(/\0/,$reset_item);
  959:         foreach my $type (@agg_types) {
  960:             $aggregates{$reset_item."\0".$type} = 0;
  961:         }  
  962: 	$aggregates{$reset_item."\0".'resettime'} = time;
  963:         my $putresult = &Apache::lonnet::put('nohist_resourcetracker',\%aggregates,
  964:                           $dom,$crs);
  965:         if ($putresult eq 'ok') {
  966:             $result .= $title.' -part '.$part.': ';
  967:             my %new_aggregates = &Apache::lonnet::dump('nohist_resourcetracker',$dom,$crs,$reset_item);
  968:             foreach my $type (@agg_types) {
  969:                 $result .= $agg_titles{$type}.' = '.$new_aggregates{$reset_item."\0".$type}.'; ';
  970:             }
  971:             $result =~ s/; $//;
  972:             $result .= '<br />';
  973:         } else {
  974:             $result = $title.' -part '.$part.': '.&mt('Unable to reset counters to zero due to [_1]',$putresult).'.<br />'."\n";
  975:         }
  976:     }
  977:     return $result;
  978: }
  979: 
  980: sub process_update {
  981:     my ($uname,$udom,$threshold_titles) = @_;
  982:     my $setoutput = '<b>Changes to threshold(s) for problem tracking:</b><br />';
  983:     foreach (keys %env) {
  984:         next if ($_!~/^form\.(.+)\_setparmval$/);
  985:         my $name  = $1;
  986:         my $value = $env{'form.'.$name.'_value'};
  987:         if ($name && defined($value) && ($value ne '')) {
  988:             my $put_result = &Apache::lonnet::put('nohist_whatsnew',
  989:                                                   {$name=>$value},$udom,$uname);
  990:            
  991:             my ($shortname) = ($name =~ /^\Q$env{'request.course.id'}\E:threshold_(.+)$/);
  992:             if ($put_result eq 'ok') {
  993:                 $setoutput.=&mt('Set threshold for [_1] to [_2]',
  994: 				'<b>'.$$threshold_titles{$shortname}.'</b>',
  995: 				'<b>'.$value.'</b>').'<br />';
  996: 	    } else {
  997:                 $setoutput.=&mt('Unable to set threshold for [_1] to [_2] due to [_3].',
  998: 				'<b>'.$name.'</b>','<b>'.$value.'</b>',
  999: 				'<tt>'.$put_result.'</tt>').'<br />';
 1000:             }
 1001:         }
 1002:     }
 1003:     return $setoutput;
 1004: }
 1005: 
 1006: sub getnormalmail {
 1007:     my ($newmsgs) = @_;
 1008: # Check for unread mail in course
 1009:     my $msgcount = 0;
 1010: 
 1011:     my @messages = sort(&Apache::lonnet::getkeys('nohist_email'));
 1012:     foreach my $message (@messages) {
 1013: 	my $msgid=&escape($message);
 1014:         my ($sendtime,$shortsubj,$fromname,$fromdom,$status,$fromcid)=
 1015:             &Apache::lonmsg::unpackmsgid($msgid);
 1016:         if (($fromcid) && ($fromcid eq $env{'request.course.id'})) {
 1017:             if (defined($sendtime) && $sendtime!~/error/) {
 1018:                 my $numsendtime = $sendtime;
 1019:                 $sendtime = &Apache::lonlocal::locallocaltime($sendtime);
 1020:                 if ($status eq 'new') {
 1021:                     $msgcount ++;
 1022:                     if ($shortsubj eq '') {
 1023:                         $shortsubj = &mt('No subject');
 1024:                     }
 1025:                     push(@{$newmsgs}, {
 1026:                         msgid    => $msgid,
 1027:                         sendtime => $sendtime,
 1028:                         shortsub => $shortsubj,
 1029:                         from     => $fromname,
 1030:                         fromdom  => $fromdom
 1031:                         });
 1032:                 }
 1033:             }
 1034:         }
 1035:     }
 1036:     return $msgcount;
 1037: }
 1038: 
 1039: sub getcritmail {
 1040:     my ($critmsgs) = @_; 
 1041: # Check for critical messages in course
 1042:     my %what=&Apache::lonnet::dump('critical');
 1043:     my $result = '';
 1044:     my $critmsgcount = 0;
 1045:     foreach my $msgid (sort(keys(%what))) {
 1046:         my ($sendtime,$shortsubj,$fromname,$fromdom,$status,$fromcid)=
 1047:             &Apache::lonmsg::unpackmsgid($msgid);
 1048:         if (($fromcid) && ($fromcid eq  $env{'request.course.id'})) {
 1049:             if (defined($sendtime) && $sendtime!~/error/) {
 1050:                 my $numsendtime = $sendtime;
 1051:                 $sendtime = &Apache::lonlocal::locallocaltime($sendtime);
 1052:                 $critmsgcount ++;
 1053:                 if ($shortsubj eq '') {
 1054:                     $shortsubj = &mt('No subject');
 1055:                 }
 1056:                 push(@{$critmsgs}, {
 1057:                         msgid    => $msgid,
 1058:                         sendtime => $sendtime,
 1059:                         shortsub => $shortsubj,
 1060:                         from     => $fromname,
 1061:                         fromdom  => $fromdom
 1062:                         });
 1063:             }
 1064:         }
 1065:     }
 1066:     return $critmsgcount;
 1067: }
 1068: 
 1069: 
 1070: sub checkversions {
 1071:     my ($cdom,$crs,$navmap,$changed,$starttime) = @_;
 1072:     my %changes=&Apache::lonnet::dump('versionupdate',$cdom,$crs);
 1073:     my ($tmp) = keys(%changes);
 1074:     unless ($tmp =~ /^(con_lost|error|no_such_host)/i) {
 1075:         if (keys(%changes) > 0) {
 1076:             foreach my $key (sort(keys(%changes))) {
 1077:                 if ($changes{$key} > $starttime) {
 1078:                     my $version;
 1079:                     my ($root,$extension)=($key=~/^(.*)\.(\w+)$/);
 1080:                     my $currentversion=&Apache::lonnet::getversion($key);
 1081:                     my $revdate = 
 1082:                           &Apache::lonnet::metadata($root.'.'.$extension,
 1083:                                                      'lastrevisiondate');
 1084:                     $revdate =  &Apache::lonlocal::locallocaltime($revdate);
 1085:                     my $linkurl=&Apache::lonnet::clutter($key);
 1086:                     my $usedversion=$navmap->usedVersion('version_'.$linkurl);
 1087:                     my @resources = $navmap->getResourceByUrl($linkurl,1);
 1088:                     if (($usedversion) && ($usedversion ne 'mostrecent')) {
 1089:                         $version = $usedversion;     
 1090:                     } else {
 1091:                         $version = $currentversion;
 1092:                     }
 1093:                     foreach my $res (@resources) {
 1094:                          if (ref($res) eq 'Apache::lonnavmaps::resource') { 
 1095:                             my $symb = $res->symb();
 1096:                             %{$$changed{$symb}} = (
 1097:                                                 current => $currentversion,
 1098:                                                 version => $version,
 1099:                                                 revdate => $revdate,
 1100:                             );
 1101:                         }
 1102:                     }
 1103:                 }
 1104:             }
 1105:         }
 1106:     }
 1107:     return;
 1108: }
 1109: 
 1110: sub display_handgrade {
 1111:     my ($r,$tograde,$ungraded) = @_;
 1112:     my %lt = &Apache::lonlocal::texthash(
 1113:                         'prna' => 'Problem Name',
 1114:                         'nmun' => 'Number ungraded',
 1115:                         'nopr' => 'No problems require handgrading',
 1116:     );
 1117:     if (@{$tograde} > 0) {
 1118:         $r->print('<tr class="LC_info_row"><td class="LC_left_item">'.
 1119:                   $lt{'prna'}.'</td><td class="LC_right_item">'.
 1120:                   $lt{'nmun'}.'</td></tr>');
 1121:         my $rowNum = 0;
 1122:         foreach my $res (@{$tograde}) {
 1123:             $rowNum ++;
 1124:             my $css_class = $rowNum%2?' class="LC_odd_row"':'';
 1125:             my ($map,$id,$url)=&Apache::lonnet::decode_symb($res);
 1126:             my $linkurl=&Apache::lonnet::clutter($url);
 1127:             $linkurl .= '?symb='.&escape($res);
 1128:             if ($$ungraded{$res}{'enclink'}) {
 1129:                 $linkurl = 
 1130:                     $$ungraded{$res}{'enclink'}.'?symb='.$$ungraded{$res}{'encsymb'};
 1131:             } 
 1132:             $r->print('<tr'.$css_class.'><td><a href="'.$linkurl.'">'.$$ungraded{$res}{title}.'</a></td><td class="LC_right_item">'.$$ungraded{$res}{count}.'</td></tr>');
 1133:         }
 1134:     } else {
 1135:         $r->print('<tr class="LC_empty_row"><td>'.$lt{'nopr'}.'</td></tr>');
 1136:     }
 1137: }
 1138: 
 1139: sub display_haserrors {
 1140:     my ($r,$bombs,$bombed,$res_title) = @_;
 1141:     my $bombnum = 0;
 1142:     my %lt = &Apache::lonlocal::texthash(
 1143:                                    reso => 'Resource',
 1144:                                    nmer => 'Number of errors',
 1145:                                    noer => 'No problems with errors',
 1146:     );
 1147:     if (@{$bombs} > 0) {
 1148:         $r->print('<tr class="LC_info_row"><td class="LC_left_item">'.
 1149:                   $lt{'reso'}.'</td><td class="LC_right_item">'.
 1150:                   $lt{'nmer'}.'</td></tr>');
 1151:         @{$bombs} = sort { &cmp_title($a,$b,$res_title) } @{$bombs};
 1152:         foreach my $bomb (@{$bombs}) {
 1153:             $bombnum ++;
 1154:             my $css_class = $bombnum%2?' class="LC_odd_row"':'';
 1155:             $r->print('<tr'.$css_class.'><td>'.$$bombed{$bomb}{errorlink}.
 1156:                       '</td><td class="LC_right_item">'.
 1157:                       $$bombed{$bomb}{errorcount}.'</td></tr>');
 1158:         }
 1159:     } else {
 1160:         $r->print('<tr class="LC_empty_row"><td>'.$lt{'noer'}.'</td></tr>');
 1161:     }
 1162:     return;
 1163: }
 1164: 
 1165: sub display_abovethreshold {
 1166:     my ($r,$refpage,$warnings,$triggered,$res_title) = @_;
 1167:     my %lt = &Apache::lonlocal::texthash(
 1168:                  reso => 'Resource',
 1169:                  part => 'Part',
 1170:                  nust => 'Num. students',
 1171:                  avat => 'Av. Attempts',
 1172:                  dedi => 'Deg. Diff',
 1173:                  lare => 'Last Reset',
 1174:                  reco => 'Reset Count?',
 1175:                  rese => 'Reset counters to 0',
 1176:                  nopr => 'No problems satisfy threshold criteria',
 1177:     );
 1178:     if (@{$warnings} > 0) {
 1179:         @{$warnings} = sort { &cmp_title($a,$b,$res_title) } @{$warnings};
 1180:         $r->print('<form name="reset_tracking" method="post" action="/adm/whatsnew">'.
 1181:                 ' <input type="hidden" name="command" value="reset" />'."\n".
 1182:                 ' <input type="hidden" name="refpage" value="'.$refpage.'" />'.
 1183:                 "\n");
 1184:         $r->print('<tr class="LC_info_row">'.
 1185: 		  '<td class="LC_left_item">'.$lt{'reso'}.'</td>'.
 1186: 		  '<td>'.$lt{'part'}.'</td><td>'.$lt{'nust'}.'</td>'.
 1187: 		  '<td>'.$lt{'avat'}.'</td><td>'.$lt{'dedi'}.'</td>'.
 1188: 		  '<td>'.$lt{'lare'}.'</td><td  class="LC_right_item">'.
 1189:                   $lt{'reco'}.'</td></tr>');
 1190: 	my $row;
 1191:         foreach my $res (@{$warnings}) {
 1192: 	    $row++;
 1193:             my ($map,$id,$url)=&Apache::lonnet::decode_symb($res);
 1194:             my $linkurl=&Apache::lonnet::clutter($url);
 1195:             my $rowspan;
 1196:             if ($$triggered{$res}{numparts} > 1) {
 1197:                 $rowspan = 'rowspan="'.$$triggered{$res}{numparts}.'"';
 1198:             }
 1199:             $linkurl .= '?symb='.&escape($res);
 1200:             if ($$triggered{$res}{'enclink'}) {
 1201:                 $linkurl = 
 1202:                   $$triggered{$res}{'enclink'}.'?symb='.$$triggered{$res}{'encsymb'};
 1203:             }
 1204:             my $css_class = $row%2?' class="LC_odd_row"':'';
 1205:             $r->print('<tr'.$css_class.'>'.
 1206: 		      '<td class="LC_first_item" '.$rowspan.'><a href="'.$linkurl.'">'.
 1207: 		      $$triggered{$res}{title}.'</a></td>');
 1208:                       if (ref($$triggered{$res}{text}) eq 'ARRAY') {
 1209: 		          $r->print($$triggered{$res}{text}[0]);
 1210:                       }
 1211:                       $r->print('</tr>');
 1212:             if (ref($$triggered{$res}{text}) eq 'ARRAY') {
 1213:                 if (@{$$triggered{$res}{text}} > 1) {
 1214:                     for (my $i=1; $i<@{$$triggered{$res}{text}}; $i++) {
 1215:                         $r->print('<tr class="'.$css_class.'">'.
 1216:                                   $$triggered{$res}{text}[$i].'</tr>');
 1217:                     }
 1218:                 }
 1219:             }
 1220:         }
 1221:         $r->print('<tr class="LC_info_row"><td colspan="7" class="LC_right_item"><br /><input type="submit" name="counters" value="'.$lt{'rese'}.'" /></td></tr></form>');
 1222:     } else {
 1223:         $r->print('<tr class="LC_empty_row"><td>'.$lt{'nopr'}.'</td></tr>');
 1224:     }
 1225: }
 1226: 
 1227: sub display_versionchanges {
 1228:     my ($r,$changed,$res_title,$interval) = @_;
 1229:     my %lt = &Apache::lonlocal::texthash(
 1230:         'reso' => 'Resource',
 1231:         'revd' => 'Last revised',
 1232:         'newv' => 'New version',
 1233:         'veru' => 'Version used',
 1234:         'noup' => 'No updated versions', 
 1235:     );
 1236:     if (keys(%{$changed}) > 0) {
 1237:         $r->print('<tr class="LC_info_row"><td class="LC_left_item">'.
 1238:                   $lt{'reso'}.'</td><td>'.$lt{'revd'}.'</td><td>'.
 1239:                   $lt{'newv'}.'</td><td class="LC_right_item">'.
 1240:                   $lt{'veru'}.'</td></tr>');
 1241:         my @changes = sort { &cmp_title($a,$b,$res_title) } keys(%{$changed});
 1242:         my $changenum = 0;
 1243:         foreach my $item (@changes) {
 1244:             $changenum ++;
 1245:             my $css_class = $changenum%2?' class="LC_odd_row"':'';
 1246:             my ($map,$id,$url)=&Apache::lonnet::decode_symb($item);
 1247:             my $linkurl=&Apache::lonnet::clutter($url);
 1248:             $linkurl .= '?symb='.&escape($item);
 1249: 
 1250:             $r->print('<tr'.$css_class.'><td><a href="'.$linkurl.'">'.
 1251:                       $$res_title{$item}.'</a></td><td>'.
 1252:                       $$changed{$item}{'revdate'}.'</td><td>'.
 1253:                       $$changed{$item}{'current'}.'</td><td>'.
 1254:                       $$changed{$item}{'version'}.'</td></tr>');
 1255:         }
 1256:     } else {
 1257:         $r->print('<tr class="LC_empty_row"><td>'.$lt{'noup'}.
 1258:                   ' '.$interval.'</td></tr>');
 1259:     }
 1260:     return;
 1261: }
 1262:  
 1263: sub display_coursediscussion {
 1264:     my ($r,$newdiscussions,$unread,$countunread,$res_title) = @_;
 1265:     my $lctype = lc(&Apache::loncommon::course_type());
 1266:     my %lt = &Apache::lonlocal::texthash(
 1267:                 'loca' => 'Location',
 1268:                 'type' => 'Type',
 1269:                 'numn' => 'Number of new posts',
 1270:                 'noun' => 'No unread posts in '.$lctype.' discussions',
 1271:                 'tmlp' => 'Time of last post', 
 1272:     );
 1273:     if (@{$newdiscussions} > 0) {
 1274:         $r->print('<tr class="LC_info_row"><td class="LC_left_item">'.
 1275:                   $lt{'loca'}.'</td><td>'.
 1276:                   $lt{'type'}.'</td>');
 1277:         if ($countunread eq 'on') {
 1278:             $r->print('<td>'.$lt{'tmlp'}.'</td>'.
 1279:                       '<td class="LC_right_item">'.$lt{'numn'}.'</td>');
 1280:         } else {
 1281:             $r->print('<td class="LC_right_item">'.$lt{'tmlp'}.'</td>');
 1282:         }
 1283:         $r->print("</tr>\n");
 1284:         @{$newdiscussions} = sort { &cmp_title($a,$b,$res_title) }
 1285:                                                             @{$newdiscussions};
 1286:         my $rowNum = 0;
 1287:         foreach my $ressymb (@{$newdiscussions}) {
 1288:             $rowNum ++;
 1289:             my $forum_title = $$unread{$ressymb}{'title'};
 1290:             my $type = 'Resource';
 1291:             my $feedurl=&Apache::lonfeedback::get_feedurl($ressymb);
 1292:             my $disclink = $feedurl.'?symb='.$$unread{$ressymb}{symb};
 1293:             if ($feedurl =~ /bulletinboard/) {
 1294:                 $type = 'Bulletin Board';
 1295:             }
 1296:             if ($$unread{$ressymb}{'enclink'}) {
 1297:                 $disclink = $$unread{$ressymb}{'enclink'}.'?symb='.$$unread{$ressymb}{'encsymb'};
 1298:             }
 1299:             my $css_class = $rowNum%2?' class="LC_odd_row"':'';
 1300:             my $lastpost = &Apache::lonnavmaps::timeToHumanString(
 1301:                                                $$unread{$ressymb}{'lastpost'});
 1302:             $r->print('<tr'.$css_class.'><td><a href="'.$disclink.'">'.$forum_title.'</a>&nbsp;</td><td>'.&mt($type).'&nbsp;</td>');
 1303:             if ($countunread eq 'on') {
 1304:                 my $unreadnum = $$unread{$ressymb}{'unreadcount'};
 1305:                 $r->print('<td>'.$lastpost.'</td><td class="LC_right_item">'.
 1306:                           $unreadnum.'&nbsp;</td>');
 1307:             } else {
 1308:                 $r->print('<td class="LC_right_item">'.$lastpost.'</td>');
 1309:             }
 1310:             $r->print("</tr>\n");
 1311:         }
 1312:     } else {
 1313:         $r->print('<tr class="LC_empty_row"><td>'.$lt{'noun'}.'</td></tr>');
 1314:     }
 1315: }
 1316: 
 1317: sub display_coursenormalmail {
 1318:     my ($r,$msgcount,$newmsgs) = @_;
 1319:     my $lctype = lc(&Apache::loncommon::course_type());
 1320:     if ($msgcount > 0) {
 1321:         $r->print('<tr class="LC_info_row"><td class="LC_left_item">'.
 1322:                   &mt('Number').'</td><td>'.&mt('Subject').'</td><td>'.
 1323:                   &mt('Sender').'</td><td class="LC_right_item">'.
 1324:                   &mt('Date/Time').'</td></tr>');
 1325:         my $mailcount = 0;
 1326:         foreach my $msg (@{$newmsgs}) {
 1327:             $mailcount ++;
 1328:             my $css_class = $mailcount%2?' class="LC_odd_row"':'';
 1329:             $r->print('<tr'.$css_class.'><td>'.$mailcount.
 1330:                       '. &nbsp;</td><td><a href="/adm/communicate">'.
 1331:                       $msg->{'shortsub'}.'</a>&nbsp; &nbsp;</td><td>&nbsp;'.
 1332:                       $msg->{'from'}.':'.$msg->{'fromdom'}.'&nbsp;</td><td>'.
 1333:                       $msg->{'sendtime'}.'</td></tr>');
 1334:         }
 1335:     } else {
 1336:         $r->print('<tr class="LC_empty_row"><td>'.
 1337:                   &mt('No new '.$lctype.' messages').'</td></tr>');
 1338:     }
 1339: }
 1340: 
 1341: sub display_coursecritmail {
 1342:     my ($r,$critmsgcount,$critmsgs) = @_;
 1343:     my $lctype = lc(&Apache::loncommon::course_type());
 1344:     if ($critmsgcount > 0) {
 1345:         $r->print('<tr class="LC_info_row"><td class="LC_left_item">'.
 1346:                   &mt('Number').'</td><td>'.&mt('Subject').'</td><td>'.
 1347:                   &mt('Sender').'</td><td class="LC_right_item">'.
 1348:                   &mt('Date/Time').'</td></tr>');
 1349:         my $mailcount = 0;
 1350:         foreach my $msg (@{$critmsgs}) {
 1351:             $mailcount ++;
 1352:             my $css_class = $mailcount%2?' class="LC_odd_row"':'';
 1353:             $r->print('<tr'.$css_class.'><td>'.$mailcount.
 1354:                       '. &nbsp;</td><td><a href="/adm/email?folder=critical">'.
 1355:                       $msg->{'shortsub'}.'</a>&nbsp; &nbsp;</td><td>&nbsp;'.
 1356:                       $msg->{'from'}.':'.$msg->{'fromdom'}.'&nbsp;</td><td>'.
 1357:                       $msg->{'sendtime'}.'</td></tr>');
 1358:         }
 1359:     } else {
 1360:         $r->print('<tr class="LC_empty_row"><td>'.
 1361:                   &mt('No unread critical messages in '.$lctype).
 1362:                   '</td></tr>');
 1363:     }
 1364: }
 1365: 
 1366: sub cmp_title {
 1367:     my ($a,$b,$res_title) = @_;
 1368:     my ($atitle,$btitle) = (lc($$res_title{$a}),lc($$res_title{$b}));
 1369:     $atitle=~s/^\s*//;
 1370:     $btitle=~s/^\s*//;
 1371:     return $atitle cmp $btitle;
 1372: }
 1373: 
 1374: sub get_display_settings {
 1375:     my ($uname,$udom,$cid) = @_;
 1376:     my %settings = &Apache::lonnet::dump('nohist_whatsnew',$udom,$uname,$cid); 
 1377:     my ($tmp) = keys(%settings);
 1378:     if ($tmp=~ /^(con_lost|error|no_such_host)/i) {
 1379:         %settings = ();
 1380:         unless ($tmp =~ /^error: 2 /) {
 1381: 	    my $lctype = lc(&Apache::loncommon::course_type());
 1382:             &Apache::lonnet::logthis('Error retrieving whatsnew settings: '.
 1383:             $tmp.' for '.$uname.':'.$udom.' for '.$lctype.': '.$cid);
 1384:         }
 1385:     }
 1386:     return %settings;
 1387: }
 1388: 
 1389: sub store_display_settings {
 1390:     my ($uname,$udom,$cid,$checkallowed) = @_;
 1391:     my %whatsnew_settings;
 1392:     my $result;
 1393:     foreach my $key (keys(%{$checkallowed})) {
 1394: 	if ($key =~ /_section$/) { next; }
 1395:         if (exists($env{'form.display_'.$key})) {
 1396:             unless ($env{'form.display_'.$key} eq '') {
 1397:                 $whatsnew_settings{$cid.':'.$key} = $env{'form.display_'.$key};
 1398:             }
 1399:         }
 1400:     }
 1401:     if (keys(%whatsnew_settings)) {
 1402:         $result = &Apache::lonnet::put('nohist_whatsnew',\%whatsnew_settings,
 1403:                                                                  $udom,$uname);
 1404:     } else {
 1405:         $result = 'ok';
 1406:     }
 1407:     return $result;
 1408: }
 1409: 
 1410: sub store_interval_setting {
 1411:     my ($uname,$udom,$cid,$interval_titles) = @_;
 1412:     my %interval_settings = ();
 1413:     my $result;
 1414:     if (defined($env{'form.interval'})) {
 1415:         $interval_settings{$cid.':interval'} = $env{'form.interval'};
 1416:         my $outcome = &Apache::lonnet::put('nohist_whatsnew',
 1417:                                              \%interval_settings,$udom,$uname);
 1418:         if ($outcome eq 'ok') {
 1419:             $result = &mt('Interval set to version changes [_1]',
 1420:                   '<b>'.$$interval_titles{$env{'form.interval'}}.'</b><br />');
 1421: 
 1422:         } else {
 1423: 	    my $lctype = lc(&Apache::loncommon::course_type());
 1424:             &Apache::lonnet::logthis('Error saving whatsnew interval setting'.
 1425:                 ' '.$outcome.' for '.$uname.':'.$udom.' in '.$lctype.' '.$cid);
 1426:             $result = &mt('Unable to set interval to [_1] due to [_2].',
 1427:                          '<b>'.$$interval_titles{$env{'form.interval'}}.'</b>',
 1428:                          '<tt>'.$outcome.'</tt>.<br />');
 1429:         }
 1430:     }
 1431:     return $result;
 1432: }
 1433: 
 1434: sub store_discussion_setting {
 1435:     my ($uname,$udom,$cid) = @_;
 1436:     my %discussion_settings;
 1437:     my $result;
 1438:     if (defined($env{'form.countunread'})) {
 1439:         $discussion_settings{$cid.':countunread'} = $env{'form.countunread'};
 1440:         my $outcome = &Apache::lonnet::put('nohist_whatsnew',
 1441:                                              \%discussion_settings,$udom,$uname);
 1442:         if ($outcome eq 'ok') {
 1443:             $result = &mt('Count unread posts in discussions display set to [_1]',
 1444:                   '<b>'.$env{'form.countunread'}.'</b><br />');
 1445:                                                                                   
 1446:         } else {
 1447: 	    my $lctype = lc(&Apache::loncommon::course_type());
 1448:             &Apache::lonnet::logthis('Error saving whatsnew countunread setting'.
 1449:                 ' '.$outcome.' for '.$uname.':'.$udom.' in '.$lctype.' '.$cid);
 1450:             $result = &mt('Unable to set "number unread posts display" to [_1]'.
 1451:                           ' due to [_2].',
 1452:                          '<b>'.$env{'form.countunread'}.'</b>',
 1453:                          '<tt>'.$outcome.'</tt>.<br />');
 1454:         }
 1455:     }
 1456:     return $result;
 1457: }
 1458: 
 1459: sub store_courseinit_setting {
 1460:     my ($uname,$udom,$cid,$initpage) = @_;
 1461:     my %courseinit_settings;
 1462:     my $page_control;
 1463:     my $result;
 1464:     if (defined($env{'form.courseinit_control'})) {
 1465:         if ($env{'form.courseinit_control'} eq 'userpref') {
 1466:             $courseinit_settings{$cid.':courseinit'} = '';
 1467:             $page_control = 'global preferences';
 1468:         } else {
 1469:             if (defined($env{'form.courseinit_page'})) {
 1470:                 $courseinit_settings{$cid.':courseinit'} = 
 1471:                                                   $env{'form.courseinit_page'};
 1472:                 $page_control = 'course specific setting';
 1473:             }
 1474:         }
 1475:         if ($page_control) {
 1476: 	    my $lctype = lc(&Apache::loncommon::course_type());
 1477:             my $outcome = &Apache::lonnet::put('nohist_whatsnew',
 1478:                                            \%courseinit_settings,$udom,$uname);
 1479:             if ($outcome eq 'ok') {
 1480:                 if ($page_control eq 'global preferences') {
 1481:                     $result = &mt("Page displayed after role selection in $lctype now set by <b>user's global preferences</b>.");
 1482:                 } else {
 1483:                     $result = &mt('Page displayed after role selection in this '.$lctype.' set to <b>[_2]</b>',$lctype,$$initpage{$env{'form.courseinit_page'}});
 1484:                 }
 1485:             } else {
 1486:                 &Apache::lonnet::logthis('Error saving whatsnew courseinit '.
 1487:                                          'setting: '.$outcome.' for '.$uname.
 1488:                                          ':'.$udom.' in '.$lctype.' '.$cid);
 1489:                 if ($page_control eq 'global preferences') {
 1490:                     $result = &mt('Unable to set control of page display to [_1]'.
 1491:                           ' due to [_2].',
 1492:                          '<b>'.$page_control.'</b>',
 1493:                          '<tt>'.$outcome.'</tt>.<br />');
 1494:                 } else {
 1495:                     $result = &mt('Unable to set page display, after role selection, for this '.$lctype.' to <b>[_2]</b> due to <tt>[_3]</tt>.<br />',
 1496:                          $$initpage{$env{'form.courseinit_page'}},$outcome);
 1497:                 }
 1498:             }
 1499:         }
 1500:     }
 1501:     return $result;
 1502: }
 1503: 
 1504: sub start_box {
 1505:     my ($r,$show,$heading,$caller,$refpage) = @_;
 1506:     my %lt = &Apache::lonlocal::texthash( 
 1507:                        chth => 'Change thresholds?',
 1508:                        chin => 'Change interval?',
 1509:                        chop => 'Change options?',
 1510:     );
 1511:     my $showhide;
 1512:     if ($$show{$caller}) {
 1513:         $showhide = '<b><a href="javascript:change_display(document.visible.'.
 1514:                                'display_'.$caller.",'hide'".');">'.
 1515:                                &mt('Hide').'</a></b>';
 1516:    
 1517:     } else {
 1518:         $showhide = '<b><a href="javascript:change_display(document.visible.'.
 1519:                                'display_'.$caller.",'show'".');">'.
 1520:                                &mt('Show').'</a></b>';
 1521:     }
 1522:     
 1523:     $r->print('
 1524:          <table class="LC_nested_outer">
 1525:           <tr>
 1526:            <th class="LC_left_item">'.$$heading{$caller}.'</th>
 1527:            <th class="LC_right_item">'.$showhide.'</th>
 1528:           </tr>');
 1529:      if (($caller eq 'abovethreshold') && ($$show{$caller})) {
 1530:          if ($$show{$caller}) {
 1531:              $r->print('
 1532:               <tr>
 1533:                 <td class="LC_subheader" colspan="2"><a href="/adm/whatsnew?command=chgthreshold&refpage='.$refpage.'">'.$lt{'chth'}.'</a></td>
 1534:               </tr>');
 1535:          }
 1536:      } elsif (($caller eq 'versionchanges') && ($$show{$caller})) {
 1537:          if ($$show{$caller}) {
 1538:              $r->print('
 1539:               <tr>
 1540:                 <td class="LC_subheader" colspan="2"><a href="/adm/whatsnew?command=chginterval&refpage='.$refpage.'">'.$lt{'chin'}.'</a></td>
 1541:               </tr>');
 1542:          }
 1543:      } elsif ($caller eq 'coursediscussion') {
 1544:          if ($$show{$caller}) {
 1545:              $r->print('
 1546:               <tr>
 1547:                 <td class="LC_subheader" colspan="2"><a href="/adm/whatsnew?command=chgdisc&refpage='.$refpage.'">'.$lt{'chop'}.'</a></td>
 1548:               </tr>');
 1549:          }
 1550:      }
 1551:     $r->print('
 1552:               <tr>
 1553:                <td colspan="2">
 1554:                 <table class="LC_nested">
 1555: ');
 1556:     return;
 1557: }
 1558: 
 1559: sub end_box {
 1560:     my ($r) = shift;
 1561:     $r->print('
 1562:    </table>
 1563:   </td>
 1564:  </tr>
 1565: </table><br />');
 1566:     return;
 1567: }
 1568: 
 1569: 1;

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