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Diff for /loncom/interface/lonnavmaps.pm between versions 1.383 and 1.400

version 1.383, 2006/05/15 23:40:54 version 1.400, 2007/08/29 00:55:37
Line 31  package Apache::lonnavmaps; Line 31  package Apache::lonnavmaps;
   
 use strict;  use strict;
 use GDBM_File;  use GDBM_File;
 use Apache::Constants qw(:common :http);  
 use Apache::loncommon();  use Apache::loncommon();
 use Apache::lonmenu();  
 use Apache::lonenc();  use Apache::lonenc();
 use Apache::lonlocal;  use Apache::lonlocal;
 use Apache::lonnet;  use Apache::lonnet;
 use POSIX qw (floor strftime);  use POSIX qw (floor strftime);
 use Data::Dumper; # for debugging, not always   use Data::Dumper; # for debugging, not always 
 use Time::HiRes qw( gettimeofday tv_interval );  use Time::HiRes qw( gettimeofday tv_interval );
   use LONCAPA;
   
 # symbolic constants  # symbolic constants
 sub SYMB { return 1; }  sub SYMB { return 1; }
Line 86  my %colormap = Line 85  my %colormap =
       $resObj->PARTIALLY_CORRECT      => '#006600'        $resObj->PARTIALLY_CORRECT      => '#006600'
       );        );
 # And a special case in the nav map; what to do when the assignment  # And a special case in the nav map; what to do when the assignment
 # is not yet done and due in less then 24 hours  # is not yet done and due in less than 24 hours
 my $hurryUpColor = "#FF0000";  my $hurryUpColor = "#FF0000";
   
 sub launch_win {  
     my ($mode,$script,$toplinkitems,$firsttime)=@_;  
     my $result;  
     if ($script ne 'no') {  
  $result.='<script type="text/javascript">';  
     }  
     if ($firsttime) {  
  $result.='function launch_navmapwin() {  
                  newWindow=open(\'/adm/navmaps?launchExternalRoles\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');  
                }';  
     } else {  
  $result.='function launch_navmapwin() {  
                  newWindow=open(\'/adm/navmaps?launchExternal\',\'loncapanav\',\'width=400,height=600,scrollbars=1\');  
                }';  
     }  
     if ($mode eq 'now') {  
  $result.="\nlaunch_navmapwin();\n";  
     }  
     if ($script ne 'no') {  
  $result.='</script>';  
     }  
     if ($mode eq 'link') {  
  &add_linkitem($toplinkitems,'launchnav','launch_navmapwin()',  
       "Launch navigation window");  
     }  
     return $result;  
 }  
   
 sub close {  sub close {
     if ($env{'environment.remotenavmap'} ne 'on') { return ''; }      if ($env{'environment.remotenavmap'} ne 'on') { return ''; }
     return(<<ENDCLOSE);      return(<<ENDCLOSE);
Line 145  this.document.navform.submit(); Line 116  this.document.navform.submit();
 ENDUPDATE  ENDUPDATE
 }  }
   
 sub handler {  
     my $r = shift;  
     real_handler($r);  
 }  
   
 sub real_handler {  
     my $r = shift;  
     #my $t0=[&gettimeofday()];  
     # Handle header-only request  
     if ($r->header_only) {  
         if ($env{'browser.mathml'}) {  
             &Apache::loncommon::content_type($r,'text/xml');  
         } else {  
             &Apache::loncommon::content_type($r,'text/html');  
         }  
         $r->send_http_header;  
         return OK;  
     }  
   
     # Send header, don't cache this page  
     if ($env{'browser.mathml'}) {  
         &Apache::loncommon::content_type($r,'text/xml');  
     } else {  
         &Apache::loncommon::content_type($r,'text/html');  
     }  
     &Apache::loncommon::no_cache($r);  
   
     my %toplinkitems=();  
     &add_linkitem(\%toplinkitems,'blank','',"Select Action");  
     if ($ENV{QUERY_STRING} eq 'collapseExternal') {  
  &Apache::lonnet::put('environment',{'remotenavmap' => 'off'});  
  &Apache::lonnet::appenv('environment.remotenavmap' => 'off');  
  my $menu=&Apache::lonmenu::reopenmenu();  
  my $navstatus=&Apache::lonmenu::get_nav_status();  
  if ($menu) {  
     $menu=(<<MENU)  
              swmenu=$menu  
              swmenu.clearTimeout(swmenu.menucltim);  
      $navstatus  
 MENU  
         } else {  
     my $nothing = &Apache::lonhtmlcommon::javascript_nothing();  
     my $mainwindow='window.open('.$nothing.',"loncapaclient","",false);';  
     $menu=(<<MENU)  
              swmenu=$mainwindow  
      $navstatus  
 MENU  
  }  
         $r->send_http_header;  
  my $js =<<"ENDSUBM";  
   <script type="text/javascript">  
      function submitthis() {  
     $menu  
     self.close();  
     }  
   
    </script>  
 ENDSUBM  
         $r->print(&Apache::loncommon::start_page(undef,$js,  
  {'only_body' => 1,  
   'bgcolor'   => '#FFFFFF',  
   'add_entries' =>   
       {'onload' =>  
    "submitthis()"}}).  
   &Apache::loncommon::end_page());  
   
         return OK;  
     }  
     if ($ENV{QUERY_STRING} =~ /^launchExternal/) {  
  &Apache::lonnet::put('environment',{'remotenavmap' => 'on'});  
  &Apache::lonnet::appenv('environment.remotenavmap' => 'on');  
   my $menu=&Apache::lonmenu::reopenmenu();  
  my $navstatus=&Apache::lonmenu::get_nav_status();  
  if ($menu) {  
     $r->print(<<MENU);  
              <script type="text/javascript">  
              swmenu=$menu  
              swmenu.clearTimeout(swmenu.menucltim);  
      $navstatus  
              </script>  
 MENU  
         }  
    }  
     if ($ENV{QUERY_STRING} eq 'turningOffExternal') {  
  $env{'environment.remotenavmap'}='off';  
     }  
   
     # Create the nav map  
     my $navmap = Apache::lonnavmaps::navmap->new();  
   
     if (!defined($navmap)) {  
         my $requrl = $r->uri;  
         $env{'user.error.msg'} = "$requrl:bre:0:0:Course not initialized";  
         return HTTP_NOT_ACCEPTABLE;  
     }  
     $r->send_http_header;  
   
 # ------------------------------------------------------------ Get query string  
     &Apache::loncommon::get_unprocessed_cgi($ENV{'QUERY_STRING'},['register','sort','showOnlyHomework','postsymb']);  
       
 # ----------------------------------------------------- Force menu registration  
     my $body_only='';  
     my $js;  
     if ($env{'environment.remotenavmap'} eq 'on') {  
  $js='<script type="text/javascript">  
                 function collapse() {  
                    this.document.location="/adm/navmaps?collapseExternal";  
                 }  
              </script>';  
  $body_only=1;  
     }  
   
     # Header  
     $r->print(&Apache::loncommon::start_page('Navigate Course Contents',$js,  
      {'only_body'       => $body_only,  
       'force_register'  =>  
   $env{'form.register'},}));  
     $r->print('<script type="text/javascript">window.focus();</script>');  
        
     $r->rflush();  
   
     # Check that it's defined  
     if (!($navmap->courseMapDefined())) {  
  $r->print(&Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT'));  
         $r->print('<font size="+2" color="red">'.&mt('Coursemap undefined.').  
   '</font>' .  
                   &Apache::loncommon::end_page());  
         return OK;  
     }  
   
     # See if there's only one map in the top-level, if we don't  
     # already have a filter... if so, automatically display it  
     # (older code; should use retrieveResources)  
     if ($ENV{QUERY_STRING} !~ /filter/) {  
         my $iterator = $navmap->getIterator(undef, undef, undef, 0);  
         my $curRes;  
         my $sequenceCount = 0;  
         my $sequenceId;  
         while ($curRes = $iterator->next()) {  
             if (ref($curRes) && $curRes->is_sequence()) {  
                 $sequenceCount++;  
                 $sequenceId = $curRes->map_pc();  
             }  
         }  
           
         if ($sequenceCount == 1) {  
             # The automatic iterator creation in the render call   
             # will pick this up. We know the condition because  
             # the defined($env{'form.filter'}) also ensures this  
             # is a fresh call.  
             $env{'form.filter'} = "$sequenceId";  
         }  
     }  
   
     if ($ENV{QUERY_STRING} eq 'launchExternal') {  
  $r->print('  
           <form name="returnwin" action="/adm/flip?postdata=navlaunch%3a"   
                 method="post" target="loncapaclient">  
           </form>');  
  $r->print('  
           <script type="text/javascript">  
               this.document.returnwin.submit();  
           </script>');  
     }  
   
     if ($env{'environment.remotenavmap'} ne 'on') {  
  $r->print(&launch_win('link','yes',\%toplinkitems));  
     }   
     if ($env{'environment.remotenavmap'} eq 'on') {  
  &add_linkitem(\%toplinkitems,'closenav','collapse()',  
       "Close navigation window");  
     }   
   
   
     # Check to see if the student is jumping to next open, do-able problem  
     if ($ENV{QUERY_STRING} =~ /^jumpToFirstHomework/) {  
         # Find the next homework problem that they can do.  
         my $iterator = $navmap->getIterator(undef, undef, undef, 1);  
         my $curRes;  
         my $foundDoableProblem = 0;  
         my $minimumduedate;  
           
         while ($curRes = $iterator->next()) {  
             if (ref($curRes) && $curRes->is_problem()) {  
                 my $status = $curRes->status();  
                 if ($curRes->completable()) {  
                     my $thisduedate=$curRes->duedate();  
                     unless ($foundDoableProblem) {  
                         $minimumduedate=$thisduedate;  
     }  
                           
                     $foundDoableProblem = 1;  
   
                     if ($thisduedate<=$minimumduedate) {  
  # Pop open all previous maps  
  my $stack = $iterator->getStack();  
  pop @$stack; # last resource in the stack is the problem  
  # itself, which we don't need in the map stack  
  my @mapPcs = map {$_->map_pc()} @$stack;  
  $env{'form.filter'} = join(',', @mapPcs);  
   
  # Mark as both "here" and "jump"  
  $env{'form.postsymb'} = $curRes->symb();  
                         $minimumduedate=$thisduedate;  
     }  
                 }  
             }  
         }  
   
         # If we found no problems, print a note to that effect.  
         if (!$foundDoableProblem) {  
             $r->print("<font size='+2'>All homework assignments have been completed.</font><br /><br />");  
         }  
     } else {  
  &add_linkitem(\%toplinkitems,'firsthomework',  
       'location.href="navmaps?jumpToFirstHomework"',  
       "Show my first due problem");  
     }  
   
     my $suppressEmptySequences = 0;  
     my $filterFunc = undef;  
     my $resource_no_folder_link = 0;  
   
     # Display only due homework.  
     my $showOnlyHomework = 0;  
     if ($env{'form.showOnlyHomework'} eq "1") {  
         $showOnlyHomework = 1;  
         $suppressEmptySequences = 1;  
         $filterFunc = sub { my $res = shift;   
                             return $res->completable() || $res->is_map();  
                         };  
  &add_linkitem(\%toplinkitems,'everything',  
      'location.href="navmaps?sort='.$env{'form.sort'}.'"',  
       "Show everything");  
         $r->print("<p><font size='+2'>".&mt("Uncompleted Problems")."</font></p>");  
         $env{'form.filter'} = '';  
         $env{'form.condition'} = 1;  
  $resource_no_folder_link = 1;  
     } else {  
  &add_linkitem(\%toplinkitems,'uncompleted',  
       'location.href="navmaps?sort='.$env{'form.sort'}.  
           '&showOnlyHomework=1"',  
       "Show only uncompleted problems");  
     }  
   
     my %selected=($env{'form.sort'} => 'selected=on');  
     my $sort_html=("<form>  
                  <nobr>  
                     <input type=\"hidden\" name=\"showOnlyHomework\" value=\"".$env{'form.showOnlyHomework'}."\" />  
                     <input type=\"submit\" value=\"".&mt('Sort by:')."\" />  
                     <select name=\"sort\">  
                        <option value=\"default\" $selected{'default'}>".&mt('Default')."</option>  
                        <option value=\"title\"   $selected{'title'}  >".&mt('Title')."</option>  
                        <option value=\"duedate\" $selected{'duedate'}>".&mt('Duedate')."</option>  
                        <option value=\"discussion\" $selected{'discussion'}>".&mt('Has New Discussion')."</option>  
                     </select>  
                  </nobr>  
                </form>");  
     # renderer call  
     my $renderArgs = { 'cols' => [0,1,2,3],  
        'sort' => $env{'form.sort'},  
                        'url' => '/adm/navmaps',  
                        'navmap' => $navmap,  
                        'suppressNavmap' => 1,  
                        'suppressEmptySequences' => $suppressEmptySequences,  
                        'filterFunc' => $filterFunc,  
        'resource_no_folder_link' => $resource_no_folder_link,  
        'sort_html'=> $sort_html,  
                        'r' => $r,  
                        'caller' => 'navmapsdisplay',  
                        'linkitems' => \%toplinkitems};  
     my $render = render($renderArgs);  
   
     # If no resources were printed, print a reassuring message so the  
     # user knows there was no error.  
     if ($renderArgs->{'counter'} == 0) {  
         if ($showOnlyHomework) {  
             $r->print("<p><font size='+1'>".&mt("All homework is currently completed").".</font></p>");  
         } else { # both jumpToFirstHomework and normal use the same: course must be empty  
             $r->print("<p><font size='+1'>This course is empty.</font></p>");  
         }  
     }  
     #my $td=&tv_interval($t0);  
     #$r->print("<br />$td");  
   
     $r->print(&Apache::loncommon::end_page());  
     $r->rflush();  
   
     return OK;  
 }  
   
 # Convenience functions: Returns a string that adds or subtracts  # Convenience functions: Returns a string that adds or subtracts
 # the second argument from the first hash, appropriate for the   # the second argument from the first hash, appropriate for the 
 # query string that determines which folders to recurse on  # query string that determines which folders to recurse on
Line 468  sub getLinkForResource { Line 148  sub getLinkForResource {
         if (defined($res)) {          if (defined($res)) {
     my $anchor;      my $anchor;
     if ($res->is_page()) {      if ($res->is_page()) {
  foreach (@$stack) { if (defined($_)) { $anchor = $_; }  }   foreach my $item (@$stack) { if (defined($item)) { $anchor = $item; }  }
  $anchor=&Apache::lonnet::escape($anchor->shown_symb());   $anchor=&escape($anchor->shown_symb());
  return ($res->link(),$res->shown_symb(),$anchor);   return ($res->link(),$res->shown_symb(),$anchor);
     }      }
             # in case folder was skipped over as "only sequence"              # in case folder was skipped over as "only sequence"
     my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());      my ($map,$id,$src)=&Apache::lonnet::decode_symb($res->symb());
     if ($map=~/\.page$/) {      if ($map=~/\.page$/) {
  my $url=&Apache::lonnet::clutter($map);   my $url=&Apache::lonnet::clutter($map);
  $anchor=&Apache::lonnet::escape($src->shown_symb());   $anchor=&escape($src->shown_symb());
  return ($url,$res->shown_symb(),$anchor);   return ($url,$res->shown_symb(),$anchor);
     }      }
         }          }
Line 486  sub getLinkForResource { Line 166  sub getLinkForResource {
     # (when we first recurse on a map, it puts an undefined resource      # (when we first recurse on a map, it puts an undefined resource
     # on the bottom because $self->{HERE} isn't defined yet, and we      # on the bottom because $self->{HERE} isn't defined yet, and we
     # want the src for the map anyhow)      # want the src for the map anyhow)
     foreach (@$stack) {      foreach my $item (@$stack) {
         if (defined($_)) { $res = $_; }          if (defined($item)) { $res = $item; }
     }      }
   
     return ($res->link(),$res->shown_symb());      return ($res->link(),$res->shown_symb());
Line 558  sub getDescription { Line 238  sub getDescription {
     }      }
 }  }
   
 # Convenience function, so others can use it: Is the problem due in less then  # Convenience function, so others can use it: Is the problem due in less than
 # 24 hours, and still can be done?  # 24 hours, and still can be done?
   
 sub dueInLessThan24Hours {  sub dueInLessThan24Hours {
Line 573  sub dueInLessThan24Hours { Line 253  sub dueInLessThan24Hours {
 }  }
   
 # Convenience function, so others can use it: Is there only one try remaining for the  # Convenience function, so others can use it: Is there only one try remaining for the
 # part, with more then one try to begin with, not due yet and still can be done?  # part, with more than one try to begin with, not due yet and still can be done?
 sub lastTry {  sub lastTry {
     my $res = shift;      my $res = shift;
     my $part = shift;      my $part = shift;
Line 642  sub timeToHumanString { Line 322  sub timeToHumanString {
         my $tense = $inPast ? " ago" : "";          my $tense = $inPast ? " ago" : "";
         my $prefix = $inPast ? "" : "in ";          my $prefix = $inPast ? "" : "in ";
                   
         # Less then a minute          # Less than a minute
         if ( $delta < $minute ) {          if ( $delta < $minute ) {
             if ($delta == 1) { return "${prefix}1 second$tense"; }              if ($delta == 1) { return "${prefix}1 second$tense"; }
             return "$prefix$delta seconds$tense";              return "$prefix$delta seconds$tense";
         }          }
   
         # Less then an hour          # Less than an hour
         if ( $delta < $hour ) {          if ( $delta < $hour ) {
             # If so, use minutes              # If so, use minutes
             my $minutes = floor($delta / 60);              my $minutes = floor($delta / 60);
Line 656  sub timeToHumanString { Line 336  sub timeToHumanString {
             return "$prefix$minutes minutes$tense";              return "$prefix$minutes minutes$tense";
         }          }
                   
         # Is it less then 24 hours away? If so,          # Is it less than 24 hours away? If so,
         # display hours + minutes          # display hours + minutes
         if ( $delta < $hour * 24) {          if ( $delta < $hour * 24) {
             my $hours = floor($delta / $hour);              my $hours = floor($delta / $hour);
Line 682  sub timeToHumanString { Line 362  sub timeToHumanString {
     return $timeStr.&Apache::lonlocal::gettimezone($time);      return $timeStr.&Apache::lonlocal::gettimezone($time);
  }   }
   
         # Less then 5 days away, display day of the week and          # Less than 5 days away, display day of the week and
         # HH:MM          # HH:MM
   
         if ( $delta < $day * 5 ) {          if ( $delta < $day * 5 ) {
Line 747  to compute due to the amount of data tha Line 427  to compute due to the amount of data tha
 processed.  processed.
   
 Apache::lonnavmaps provides an object model for manipulating this  Apache::lonnavmaps provides an object model for manipulating this
 information in a higher-level fashion then directly manipulating   information in a higher-level fashion than directly manipulating 
 the hash. It also provides access to several auxilary functions   the hash. It also provides access to several auxilary functions 
 that aren't necessarily stored in the Big Hash, but are a per-  that aren't necessarily stored in the Big Hash, but are a per-
 resource sort of value, like whether there is any feedback on   resource sort of value, like whether there is any feedback on 
Line 793  Apache::lonnavmaps::render({}). Line 473  Apache::lonnavmaps::render({}).
 =head2 Overview of Columns  =head2 Overview of Columns
   
 The renderer will build an HTML table for the navmap and return  The renderer will build an HTML table for the navmap and return
 it. The table is consists of several columns, and a row for each  it. The table consists of several columns, and a row for each
 resource (or possibly each part). You tell the renderer how many  resource (or possibly each part). You tell the renderer how many
 columns to create and what to place in each column, optionally using  columns to create and what to place in each column, optionally using
 one or more of the prepared columns, and the renderer will assemble  one or more of the prepared columns, and the renderer will assemble
Line 1091  sub render_resource { Line 771  sub render_resource {
           
     if ($resource->is_problem()) {      if ($resource->is_problem()) {
         if ($part eq '0' || $params->{'condensed'}) {          if ($part eq '0' || $params->{'condensed'}) {
             $icon ='<img src="'.$location.'/problem.gif" alt="'.&mt('Problem').'" border="0" />';      $icon = '<img src="'.$location.'/';
       if ($resource->is_task()) {
    $icon .= 'task.gif" alt="'.&mt('Task');
       } else {
    $icon .= 'problem.gif" alt="'.&mt('Problem');
       }
       $icon .='" border="0" />';
         } else {          } else {
             $icon = $params->{'indentString'};              $icon = $params->{'indentString'};
         }          }
Line 1116  sub render_resource { Line 802  sub render_resource {
  ($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";   ($nowOpen ? &mt('Open Folder') : &mt('Close Folder')).' '.$title."\" border='0' />";
   
             $linkopen = "<a href=\"" . $params->{'url'} . '?' .               $linkopen = "<a href=\"" . $params->{'url'} . '?' . 
                 $params->{'queryString'} . '&filter=';                  $params->{'queryString'} . '&amp;filter=';
             $linkopen .= ($nowOpen xor $it->{CONDITION}) ?              $linkopen .= ($nowOpen xor $it->{CONDITION}) ?
                 addToFilter($filter, $mapId) :                  addToFilter($filter, $mapId) :
                 removeFromFilter($filter, $mapId);                  removeFromFilter($filter, $mapId);
             $linkopen .= "&condition=" . $it->{CONDITION} . '&hereType='              $linkopen .= "&amp;condition=" . $it->{CONDITION} . '&amp;hereType='
                 . $params->{'hereType'} . '&here=' .                  . $params->{'hereType'} . '&amp;here=' .
                 &Apache::lonnet::escape($params->{'here'}) .                   &escape($params->{'here'}) . 
                 '&jump=' .                  '&amp;jump=' .
                 &Apache::lonnet::escape($resource->symb()) .                   &escape($resource->symb()) . 
                 "&folderManip=1\">";                  "&amp;folderManip=1\">";
   
         } else {          } else {
             # Don't allow users to manipulate folder              # Don't allow users to manipulate folder
Line 1147  sub render_resource { Line 833  sub render_resource {
     }      }
           
     # We're done preparing and finally ready to start the rendering      # We're done preparing and finally ready to start the rendering
     my $result = "<td align='left' valign='center'>";      my $result = "<td align='left' valign='middle'>";
   
     my $indentLevel = $params->{'indentLevel'};      my $indentLevel = $params->{'indentLevel'};
     if ($newBranchText) { $indentLevel--; }      if ($newBranchText) { $indentLevel--; }
Line 1176  sub render_resource { Line 862  sub render_resource {
         !$params->{'condensed'}) {          !$params->{'condensed'}) {
  my $displaypart=$resource->part_display($part);   my $displaypart=$resource->part_display($part);
         $partLabel = " (".&mt('Part: [_1]', $displaypart).")";          $partLabel = " (".&mt('Part: [_1]', $displaypart).")";
  if ($link!~/\#/) { $link.='#'.&Apache::lonnet::escape($part); }   if ($link!~/\#/) { $link.='#'.&escape($part); }
         $title = "";          $title = "";
     }      }
   
Line 1211  sub render_communication_status { Line 897  sub render_communication_status {
     my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");      my $location=&Apache::loncommon::lonhttpdurl("/adm/lonMisc");
     if ($resource->hasDiscussion()) {      if ($resource->hasDiscussion()) {
         $discussionHTML = $linkopen .          $discussionHTML = $linkopen .
             '<img border="0" src="'.$location.'/chat.gif" />' .              '<img alt="'.&mt('New Discussion').'" border="0" src="'.$location.'/chat.gif" />' .
             $linkclose;              $linkclose;
     }      }
           
     if ($resource->getFeedback()) {      if ($resource->getFeedback()) {
         my $feedback = $resource->getFeedback();          my $feedback = $resource->getFeedback();
         foreach (split(/\,/, $feedback)) {          foreach my $msgid (split(/\,/, $feedback)) {
             if ($_) {              if ($msgid) {
                 $feedbackHTML .= '&nbsp;<a '.$target.' href="/adm/email?display='                  $feedbackHTML .= '&nbsp;<a '.$target.' href="/adm/email?display='
                     . &Apache::lonnet::escape($_) . '">'                      . &escape($msgid) . '">'
                     . '<img src="'.$location.'/feedback.gif" '                      . '<img alt="'.&mt('New Email').'" src="'.$location.'/feedback.gif" '
                     . 'border="0" /></a>';                      . 'border="0" /></a>';
             }              }
         }          }
Line 1230  sub render_communication_status { Line 916  sub render_communication_status {
     if ($resource->getErrors()) {      if ($resource->getErrors()) {
         my $errors = $resource->getErrors();          my $errors = $resource->getErrors();
         my $errorcount = 0;          my $errorcount = 0;
         foreach (split(/,/, $errors)) {          foreach my $msgid (split(/,/, $errors)) {
             last if ($errorcount>=10); # Only output 10 bombs maximum              last if ($errorcount>=10); # Only output 10 bombs maximum
             if ($_) {              if ($msgid) {
                 $errorcount++;                  $errorcount++;
                 $errorHTML .= '&nbsp;<a '.$target.' href="/adm/email?display='                  $errorHTML .= '&nbsp;<a '.$target.' href="/adm/email?display='
                     . &Apache::lonnet::escape($_) . '">'                      . &escape($msgid) . '">'
                     . '<img src="'.$location.'/bomb.gif" '                      . '<img alt="'.&mt('New Error').'" src="'.$location.'/bomb.gif" '
                     . 'border="0" /></a>';                      . 'border="0" /></a>';
             }              }
         }          }
Line 1246  sub render_communication_status { Line 932  sub render_communication_status {
  $discussionHTML = $feedbackHTML = $errorHTML = '';   $discussionHTML = $feedbackHTML = $errorHTML = '';
     }      }
   
     return "<td width=\"75\" align=\"left\" valign=\"center\">$discussionHTML$feedbackHTML$errorHTML&nbsp;</td>";      return "<td width=\"75\" align=\"left\" valign=\"middle\">$discussionHTML$feedbackHTML$errorHTML&nbsp;</td>";
   
 }  }
 sub render_quick_status {  sub render_quick_status {
Line 1271  sub render_quick_status { Line 957  sub render_quick_status {
         if ($icon) {          if ($icon) {
     my $location=      my $location=
  &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");   &Apache::loncommon::lonhttpdurl("/adm/lonIcons/$icon");
             $result .= "<td width='30' valign='center' width='50' align='right'>$linkopen<img width='25' height='25' src='$location' border='0' alt='$alt' />$linkclose</td>\n";              $result .= "<td valign='middle' width='50' align='right'>$linkopen<img width='25' height='25' src='$location' border='0' alt='$alt' />$linkclose</td>\n";
         } else {          } else {
             $result .= "<td width='30'>&nbsp;</td>\n";              $result .= "<td width='30'>&nbsp;</td>\n";
         }          }
Line 1283  sub render_quick_status { Line 969  sub render_quick_status {
 }  }
 sub render_long_status {  sub render_long_status {
     my ($resource, $part, $params) = @_;      my ($resource, $part, $params) = @_;
     my $result = "<td align='right' valign='center'>\n";      my $result = "<td align='right' valign='middle'>\n";
     my $firstDisplayed = !$params->{'condensed'} &&       my $firstDisplayed = !$params->{'condensed'} && 
         $params->{'multipart'} && $part eq "0";          $params->{'multipart'} && $part eq "0";
                                   
Line 1305  sub render_long_status { Line 991  sub render_long_status {
         if ($color) {$result .= "</b></font>"; }          if ($color) {$result .= "</b></font>"; }
     }      }
     if ($resource->is_map() && advancedUser() && $resource->randompick()) {      if ($resource->is_map() && advancedUser() && $resource->randompick()) {
         $result .= '(randomly select ' . $resource->randompick() .')';          $result .= &mt('(randomly select [_1])', $resource->randompick());
       }
       if ($resource->is_map() && &advancedUser() && $resource->randomorder()) {
           $result .= &mt('(randomly ordered)');
     }      }
   
     # Debugging code      # Debugging code
Line 1439  sub render { Line 1128  sub render {
     # marker      # marker
     my $filterHash = {};      my $filterHash = {};
     # Figure out what we're not displaying      # Figure out what we're not displaying
     foreach (split(/\,/, $env{"form.filter"})) {      foreach my $item (split(/\,/, $env{"form.filter"})) {
         if ($_) {          if ($item) {
             $filterHash->{$_} = "1";              $filterHash->{$item} = "1";
         }          }
     }      }
   
Line 1469  sub render { Line 1158  sub render {
             $navmap = Apache::lonnavmaps::navmap->new();              $navmap = Apache::lonnavmaps::navmap->new();
     if (!defined($navmap)) {      if (!defined($navmap)) {
  # no londer in course   # no londer in course
  return '<font color="red">'.&mt('No course selected').'</font><br />   return '<span class="LC_error">'.&mt('No course selected').'</span><br />
                         <a href="/adm/roles">'.&mt('Select a course').'</a><br />';                          <a href="/adm/roles">'.&mt('Select a course').'</a><br />';
     }      }
  }   }
Line 1607  sub render { Line 1296  sub render {
     if ($printCloseAll && !$args->{'resource_no_folder_link'}) {      if ($printCloseAll && !$args->{'resource_no_folder_link'}) {
  my ($link,$text);   my ($link,$text);
         if ($condition) {          if ($condition) {
     $link='"navmaps?condition=0&filter=&'.$queryString.      $link='"navmaps?condition=0&amp;filter=&amp;'.$queryString.
  '&here='.&Apache::lonnet::escape($here).'"';   '&here='.&escape($here).'"';
     $text='Close all folders';      $text='Close all folders';
         } else {          } else {
     $link='"navmaps?condition=1&filter=&'.$queryString.      $link='"navmaps?condition=1&amp;filter=&amp;'.$queryString.
  '&here='.&Apache::lonnet::escape($here).'"';   '&here='.&escape($here).'"';
     $text='Open all folders';      $text='Open all folders';
         }          }
  if ($args->{'caller'} eq 'navmapsdisplay') {   if ($args->{'caller'} eq 'navmapsdisplay') {
Line 1658  END Line 1347  END
   
     if ($args->{'caller'} eq 'navmapsdisplay') {      if ($args->{'caller'} eq 'navmapsdisplay') {
         $result .= '<table><tr><td>'.          $result .= '<table><tr><td>'.
                    &Apache::loncommon::help_open_menu('','Navigation Screen','Navigation_Screen','',undef,'RAT').'</td>';                     &Apache::loncommon::help_open_menu('Navigation Screen','Navigation_Screen',undef,'RAT').'</td>';
  if ($env{'environment.remotenavmap'} ne 'on') {   if ($env{'environment.remotenavmap'} ne 'on') {
     $result .= '<td>&nbsp;</td>';       $result .= '<td>&nbsp;</td>'; 
         } else {          } else {
Line 1923  END Line 1612  END
     my $srcHasQuestion = $src =~ /\?/;      my $srcHasQuestion = $src =~ /\?/;
     $args->{"resourceLink"} = $src.      $args->{"resourceLink"} = $src.
  ($srcHasQuestion?'&':'?') .   ($srcHasQuestion?'&':'?') .
  'symb=' . &Apache::lonnet::escape($symb).$anchor;   'symb=' . &escape($symb).$anchor;
  }   }
         # Now, we've decided what parts to show. Loop through them and          # Now, we've decided what parts to show. Loop through them and
         # show them.          # show them.
Line 2115  See iterator documentation below. Line 1804  See iterator documentation below.
 use strict;  use strict;
 use GDBM_File;  use GDBM_File;
 use Apache::lonnet;  use Apache::lonnet;
   use LONCAPA;
   
 sub new {  sub new {
     # magic invocation to create a class instance      # magic invocation to create a class instance
Line 2214  sub generate_email_discuss_status { Line 1904  sub generate_email_discuss_status {
     my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',      my %lastread = &Apache::lonnet::dump('nohist_'.$cid.'_discuss',
                                         $env{'user.domain'},$env{'user.name'},'lastread');                                          $env{'user.domain'},$env{'user.name'},'lastread');
     my %lastreadtime = ();      my %lastreadtime = ();
     foreach (keys %lastread) {      foreach my $key (keys %lastread) {
         my $key = $_;          my $shortkey = $key;
         $key =~ s/_lastread$//;          $shortkey =~ s/_lastread$//;
         $lastreadtime{$key} = $lastread{$_};          $lastreadtime{$shortkey} = $lastread{$key};
     }      }
   
     my %feedback=();      my %feedback=();
Line 2227  sub generate_email_discuss_status { Line 1917  sub generate_email_discuss_status {
           
     foreach my $msgid (@keys) {      foreach my $msgid (@keys) {
  if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {   if ((!$emailstatus{$msgid}) || ($emailstatus{$msgid} eq 'new')) {
     my $plain=              my ($sendtime,$shortsubj,$fromname,$fromdomain,$status,$fromcid,
  &Apache::lonnet::unescape(&Apache::lonnet::unescape($msgid));                  $symb,$error) = &Apache::lonmsg::unpackmsgid($msgid);
     if ($plain=~/ \[([^\]]+)\]\:/) {              &Apache::lonenc::check_decrypt(\$symb); 
  my $url=$1;              if (($fromcid ne '') && ($fromcid ne $cid)) {
  if ($plain=~/\:Error \[/) {                  next;
     $error{$url}.=','.$msgid;               }
  } else {              if (defined($symb)) {
     $feedback{$url}.=','.$msgid;                  if (defined($error) && $error == 1) {
  }                      $error{$symb}.=','.$msgid;
     }                  } else {
                       $feedback{$symb}.=','.$msgid;
                   }
               } else {
                   my $plain=
                       &LONCAPA::unescape(&LONCAPA::unescape($msgid));
                   if ($plain=~/ \[([^\]]+)\]\:/) {
                       my $url=$1;
                       if ($plain=~/\:Error \[/) {
                           $error{$url}.=','.$msgid;
                       } else {
                           $feedback{$url}.=','.$msgid;
                       }
                   }
               }
  }   }
     }      }
           
     #url's of resources that have feedbacks      #symbs of resources that have feedbacks (will be urls pre-2.3)
     $self->{FEEDBACK} = \%feedback;      $self->{FEEDBACK} = \%feedback;
     #or errors      #or errors (will be urls pre 2.3)
     $self->{ERROR_MSG} = \%error;      $self->{ERROR_MSG} = \%error;
     $self->{DISCUSSION_TIME} = \%discussiontime;      $self->{DISCUSSION_TIME} = \%discussiontime;
     $self->{EMAIL_STATUS} = \%emailstatus;      $self->{EMAIL_STATUS} = \%emailstatus;
Line 2347  sub last_post_time { Line 2051  sub last_post_time {
     return $self->{DISCUSSION_TIME}->{$ressymb};      return $self->{DISCUSSION_TIME}->{$ressymb};
 }  }
   
 sub unread_discussion {  sub discussion_info {
     my $self = shift;      my $self = shift;
     my $symb = shift;      my $symb = shift;
       my $filter = shift;
   
     $self->get_discussion_data();      $self->get_discussion_data();
   
     my $ressymb = $self->wrap_symb($symb);      my $ressymb = $self->wrap_symb($symb);
     # keys used to store bulletinboard postings use 'unwrapped' symb.       # keys used to store bulletinboard postings use 'unwrapped' symb. 
     my $discsymb = $self->unwrap_symb($ressymb);      my $discsymb = &escape($self->unwrap_symb($ressymb));
     my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};      my $version = $self->{DISCUSSION_DATA}{'version:'.$discsymb};
     if (!$version) { return; }      if (!$version) { return; }
   
     my $prevread = $self->{LAST_READ}{$ressymb};      my $prevread = $self->{LAST_READ}{$ressymb};
   
     my $unreadcount = 0;      my $count = 0;
     my $hiddenflag = 0;      my $hiddenflag = 0;
     my $deletedflag = 0;      my $deletedflag = 0;
     my ($hidden,$deleted);      my ($hidden,$deleted,%info);
   
     my %subjects;  
   
     for (my $id=$version; $id>0; $id--) {      for (my $id=$version; $id>0; $id--) {
  my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};   my $vkeys=$self->{DISCUSSION_DATA}{$id.':keys:'.$discsymb};
Line 2382  sub unread_discussion { Line 2085  sub unread_discussion {
  $deletedflag = 1;   $deletedflag = 1;
     }      }
  } else {   } else {
     if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)      if (($hidden !~/\.$id\./) && ($deleted !~/\.$id\./)) {
  && $prevread < $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {                  if ($filter eq 'unread') {
     $unreadcount++;      if ($prevread >= $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'}) {
     $subjects{$unreadcount}=                          next;
  $id.': '.$self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};                      }
  }                  }
    $count++;
    $info{$count}{'subject'} =
       $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':subject'};
                   $info{$count}{'id'} = $id;
                   $info{$count}{'timestamp'} = $self->{DISCUSSION_DATA}{$id.':'.$discsymb.':timestamp'};
               }
  }   }
     }      }
     if (wantarray) {      if (wantarray) {
  return ($unreadcount,\%subjects);   return ($count,%info);
     }      }
     return $unreadcount      return $count;
 }  }
   
 sub wrap_symb {  sub wrap_symb {
Line 2424  sub unwrap_symb { Line 2133  sub unwrap_symb {
 sub getFeedback {   sub getFeedback { 
     my $self = shift;      my $self = shift;
     my $symb = shift;      my $symb = shift;
       my $source = shift;
   
     $self->generate_email_discuss_status();      $self->generate_email_discuss_status();
   
     if (!defined($self->{FEEDBACK})) { return ""; }      if (!defined($self->{FEEDBACK})) { return ""; }
           
     return $self->{FEEDBACK}->{$symb};      my $feedback;
       if ($self->{FEEDBACK}->{$symb}) {
           $feedback = $self->{FEEDBACK}->{$symb};
           if ($self->{FEEDBACK}->{$source}) {
               $feedback .= ','.$self->{FEEDBACK}->{$source};
           }
       } else {
           if ($self->{FEEDBACK}->{$source}) {
               $feedback = $self->{FEEDBACK}->{$source};
           }
       }
       return $feedback;
 }  }
   
 # Private method: Get the errors for that resource (by source).  # Private method: Get the errors for that resource (by source).
 sub getErrors {   sub getErrors { 
     my $self = shift;      my $self = shift;
       my $symb = shift;
     my $src = shift;      my $src = shift;
   
     $self->generate_email_discuss_status();      $self->generate_email_discuss_status();
   
     if (!defined($self->{ERROR_MSG})) { return ""; }      if (!defined($self->{ERROR_MSG})) { return ""; }
     return $self->{ERROR_MSG}->{$src};  
       my $errors;
       if ($self->{ERROR_MSG}->{$symb}) {
           $errors = $self->{ERROR_MSG}->{$symb};
           if ($self->{ERROR_MSG}->{$src}) {
               $errors .= ','.$self->{ERROR_MSG}->{$src};
           }
       } else {
           if ($self->{ERROR_MSG}->{$src}) {
               $errors = $self->{ERROR_MSG}->{$src};
           }
       }
       return $errors;
 }  }
   
 =pod  =pod
Line 2466  the given map. This is one of the proper Line 2200  the given map. This is one of the proper
   
 # The strategy here is to cache the resource objects, and only construct them  # The strategy here is to cache the resource objects, and only construct them
 # as we use them. The real point is to prevent reading any more from the tied  # as we use them. The real point is to prevent reading any more from the tied
 # hash then we have to, which should hopefully alleviate speed problems.  # hash than we have to, which should hopefully alleviate speed problems.
   
 sub getById {  sub getById {
     my $self = shift;      my $self = shift;
Line 2540  sub finishResource { Line 2274  sub finishResource {
 # the actual lookup; parmval caches the results.  # the actual lookup; parmval caches the results.
 sub parmval {  sub parmval {
     my $self = shift;      my $self = shift;
     my ($what,$symb)=@_;      my ($what,$symb,$recurse)=@_;
     my $hashkey = $what."|||".$symb;      my $hashkey = $what."|||".$symb;
   
     if (defined($self->{PARM_CACHE}->{$hashkey})) {      if (defined($self->{PARM_CACHE}->{$hashkey})) {
         return $self->{PARM_CACHE}->{$hashkey};          return $self->{PARM_CACHE}->{$hashkey};
     }      }
   
     my $result = $self->parmval_real($what, $symb);      my $result = $self->parmval_real($what, $symb, $recurse);
     $self->{PARM_CACHE}->{$hashkey} = $result;      $self->{PARM_CACHE}->{$hashkey} = $result;
     return $result;      return $result;
 }  }
Line 2657  sub parmval_real { Line 2391  sub parmval_real {
  if (defined($partgeneral)) { return $partgeneral; }   if (defined($partgeneral)) { return $partgeneral; }
     }      }
     if ($recurse) { return undef; }      if ($recurse) { return undef; }
     my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$what);      my $pack_def=&Apache::lonnet::packages_tab_default($fn,'resource.'.$rwhat);
     if (defined($pack_def)) { return $pack_def; }      if (defined($pack_def)) { return $pack_def; }
     return '';      return '';
 }  }
Line 2667  sub parmval_real { Line 2401  sub parmval_real {
 =item * B<getResourceByUrl>(url,multiple):  =item * B<getResourceByUrl>(url,multiple):
   
 Retrieves a resource object by URL of the resource, unless the optional  Retrieves a resource object by URL of the resource, unless the optional
 multiple parameter is included in wahich caes an array of resource   multiple parameter is included in which case an array of resource 
 objects is returned. If passed a resource object, it will simply return    objects is returned. If passed a resource object, it will simply return  
 it, so it is safe to use this method in code like  it, so it is safe to use this method in code like
 "$res = $navmap->getResourceByUrl($res)"  "$res = $navmap->getResourceByUrl($res)"
Line 2702  all matching resources. Line 2436  all matching resources.
   
 =item * B<hasResource>(map, filterFunc, recursive, showall):  =item * B<hasResource>(map, filterFunc, recursive, showall):
   
 Convience method for  Convenience method for
   
  scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0   scalar(retrieveResources($map, $filterFunc, $recursive, 1, $showall)) > 0
   
Line 2780  sub retrieveResources { Line 2514  sub retrieveResources {
   
     my @resources = ();      my @resources = ();
   
       if (&$filterFunc($map)) {
    push(@resources, $map);
       }
   
     # Run down the iterator and collect the resources.      # Run down the iterator and collect the resources.
     my $curRes;      my $curRes;
   
Line 2789  sub retrieveResources { Line 2527  sub retrieveResources {
                 next;                  next;
             }              }
   
             push @resources, $curRes;              push(@resources, $curRes);
   
             if ($bailout) {              if ($bailout) {
                 return @resources;                  return @resources;
Line 2936  be the tokens described above. Line 2674  be the tokens described above.
   
 Also note there is some old code floating around that trys to track  Also note there is some old code floating around that trys to track
 the depth of the iterator to see when it's done; do not copy that   the depth of the iterator to see when it's done; do not copy that 
 code. It is difficult to get right and harder to understand then  code. It is difficult to get right and harder to understand than
 this. They should be migrated to this new style.  this. They should be migrated to this new style.
   
 =cut  =cut
Line 3221  sub next { Line 2959  sub next {
     }      }
   
     # Is this the end of a branch? If so, all of the resources examined above      # Is this the end of a branch? If so, all of the resources examined above
     # led to lower levels then the one we are currently at, so we push a END_BRANCH      # led to lower levels than the one we are currently at, so we push a END_BRANCH
     # marker onto the stack so we don't forget.      # marker onto the stack so we don't forget.
     # Example: For the usual A(BC)(DE)F case, when the iterator goes down the      # Example: For the usual A(BC)(DE)F case, when the iterator goes down the
     # BC branch and gets to C, it will see F as the only next resource, but it's      # BC branch and gets to C, it will see F as the only next resource, but it's
Line 3430  sub next { Line 3168  sub next {
   
     # filter the next possibilities to remove things we've       # filter the next possibilities to remove things we've 
     # already seen.      # already seen.
     foreach (@$nextUnfiltered) {      foreach my $item (@$nextUnfiltered) {
         if (!defined($self->{ALREADY_SEEN}->{$_->{ID}})) {          if (!defined($self->{ALREADY_SEEN}->{$item->{ID}})) {
             push @$next, $_;              push @$next, $item;
         }          }
     }      }
   
Line 3557  X<symb> X<resource, symb> Line 3295  X<symb> X<resource, symb>
 All resources also have B<symb>s, which uniquely identify a resource  All resources also have B<symb>s, which uniquely identify a resource
 in a course. Many internal LON-CAPA functions expect a symb. A symb  in a course. Many internal LON-CAPA functions expect a symb. A symb
 carries along with it the URL of the resource, and the map it appears  carries along with it the URL of the resource, and the map it appears
 in. Symbs are much larger then resource IDs.  in. Symbs are much larger than resource IDs.
   
 =cut  =cut
   
Line 3633  false. Line 3371  false.
   
 =item * B<randompick>:  =item * B<randompick>:
   
 Returns true for a map if the randompick feature is being used on the  Returns the number of randomly picked items for a map if the randompick
 map. (?)  feature is being used on the map. 
   
   =item * B<randomorder>:
   
   Returns true for a map if the randomorder feature is being used on the
   map.
   
 =item * B<src>:  =item * B<src>:
   
Line 3666  sub randompick { Line 3409  sub randompick {
     my $self = shift;      my $self = shift;
     return $self->parmval('randompick');      return $self->parmval('randompick');
 }  }
   sub randomorder { 
       my $self = shift;
       return ($self->parmval('randomorder') =~ /^yes$/i);
   }
 sub link {  sub link {
     my $self=shift;      my $self=shift;
     if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }      if ($self->encrypted()) { return &Apache::lonenc::encrypted($self->src); }
Line 3742  sub compTitle { Line 3489  sub compTitle {
     }      }
     return $title;      return $title;
 }  }
   
 =pod  =pod
   
 B<Predicate Testing the Resource>  B<Predicate Testing the Resource>
Line 3934  sub map_type { Line 3682  sub map_type {
   
 # These functions will be responsible for returning the CORRECT  # These functions will be responsible for returning the CORRECT
 # VALUE for the parameter, no matter what. So while they may look  # VALUE for the parameter, no matter what. So while they may look
 # like direct calls to parmval, they can be more then that.  # like direct calls to parmval, they can be more than that.
 # So, for instance, the duedate function should use the "duedatetype"  # So, for instance, the duedate function should use the "duedatetype"
 # information, rather then the resource object user.  # information, rather than the resource object user.
   
 =pod  =pod
   
Line 4035  sub duedate { Line 3783  sub duedate {
     my $date;      my $date;
     my $interval=$self->parmval("interval", $part);      my $interval=$self->parmval("interval", $part);
     my $due_date=$self->parmval("duedate", $part);      my $due_date=$self->parmval("duedate", $part);
     if (defined($interval)) {      if ($interval =~ /\d+/) {
  my $first_access=&Apache::lonnet::get_first_access('map',$self->symb);   my $first_access=&Apache::lonnet::get_first_access('map',$self->symb);
  if (defined($first_access)) {   if (defined($first_access)) {
     $interval = $first_access+$interval;      $interval = $first_access+$interval;
Line 4050  sub duedate { Line 3798  sub duedate {
 }  }
 sub handgrade {  sub handgrade {
     (my $self, my $part) = @_;      (my $self, my $part) = @_;
       my @response_ids = $self->responseIds($part);
       if (@response_ids) {
    foreach my $response_id (@response_ids) {
       if (lc($self->parmval("handgrade",$part.'_'.$response_id))
    eq 'yes') {
    return 'yes';
       }
    }
       }
     return $self->parmval("handgrade", $part);      return $self->parmval("handgrade", $part);
 }  }
 sub maxtries {  sub maxtries {
Line 4148  data was not extracted when the nav map Line 3905  data was not extracted when the nav map
 Returns a false value if there hasn't been discussion otherwise returns  Returns a false value if there hasn't been discussion otherwise returns
 unix timestamp of last time a discussion posting (or edit) was made.  unix timestamp of last time a discussion posting (or edit) was made.
   
 =item * B<unread_discussion>:  =item * B<discussion_info>:
   
 returns in scalar context the count of the number of unread discussion  optional argument is a filter (currently can be 'unread');
 postings  returns in scalar context the count of the number of discussion postings.
   
 returns in list context both the count of postings and a hash ref  returns in list context both the count of postings and a hash ref
 containing the subjects of all unread postings  containing information about the postings (subject, id, timestamp) in a hash.
   
   Default is to return counts for all postings.  However if called with a second argument set to 'unread', will return information about only unread postings.
   
 =item * B<getFeedback>:  =item * B<getFeedback>:
   
Line 4163  for the resource, or the null string if Line 3922  for the resource, or the null string if
 email data was not extracted when the nav map was constructed. Usually  email data was not extracted when the nav map was constructed. Usually
 used like this:  used like this:
   
  for (split(/\,/, $res->getFeedback())) {   for my $url (split(/\,/, $res->getFeedback())) {
     my $link = &Apache::lonnet::escape($_);      my $link = &escape($url);
     ...      ...
   
 and use the link as appropriate.  and use the link as appropriate.
Line 4181  sub last_post_time { Line 3940  sub last_post_time {
     return $self->{NAV_MAP}->last_post_time($self->symb());      return $self->{NAV_MAP}->last_post_time($self->symb());
 }  }
   
 sub unread_discussion {  sub discussion_info {
     my $self = shift;      my ($self,$filter) = @_;
     return $self->{NAV_MAP}->unread_discussion($self->symb());      return $self->{NAV_MAP}->discussion_info($self->symb(),$filter);
 }  }
   
 sub getFeedback {  sub getFeedback {
     my $self = shift;      my $self = shift;
     my $source = $self->src();      my $source = $self->src();
       my $symb = $self->symb();
     if ($source =~ /^\/res\//) { $source = substr $source, 5; }      if ($source =~ /^\/res\//) { $source = substr $source, 5; }
     return $self->{NAV_MAP}->getFeedback($source);      return $self->{NAV_MAP}->getFeedback($symb,$source);
 }  }
   
 sub getErrors {  sub getErrors {
     my $self = shift;      my $self = shift;
     my $source = $self->src();      my $source = $self->src();
       my $symb = $self->symb();
     if ($source =~ /^\/res\//) { $source = substr $source, 5; }      if ($source =~ /^\/res\//) { $source = substr $source, 5; }
     return $self->{NAV_MAP}->getErrors($source);      return $self->{NAV_MAP}->getErrors($symb,$source);
 }  }
   
 =pod  =pod
Line 4358  sub extractParts { Line 4119  sub extractParts {
  $self->{PART_TYPE} = {};   $self->{PART_TYPE} = {};
  return;   return;
     }      }
     foreach (split(/\,/,$metadata)) {      foreach my $entry (split(/\,/,$metadata)) {
  if ($_ =~ /^(?:part|Task)_(.*)$/) {   if ($entry =~ /^(?:part|Task)_(.*)$/) {
     my $part = $1;      my $part = $1;
     # This floods the logs if it blows up      # This floods the logs if it blows up
     if (defined($parts{$part})) {      if (defined($parts{$part})) {
Line 4384  sub extractParts { Line 4145  sub extractParts {
   
   
         # Init the responseIdHash          # Init the responseIdHash
         foreach (@{$self->{PARTS}}) {          foreach my $part (@{$self->{PARTS}}) {
             $responseIdHash{$_} = [];              $responseIdHash{$part} = [];
         }          }
   
         # Now, the unfortunate thing about this is that parts, part name, and          # Now, the unfortunate thing about this is that parts, part name, and
Line 4465  the completion information. Line 4226  the completion information.
 Idiomatic usage of these two methods would probably look something  Idiomatic usage of these two methods would probably look something
 like  like
   
  foreach ($resource->parts()) {   foreach my $part ($resource->parts()) {
     my $dateStatus = $resource->getDateStatus($_);      my $dateStatus = $resource->getDateStatus($part);
     my $completionStatus = $resource->getCompletionStatus($_);      my $completionStatus = $resource->getCompletionStatus($part);
   
     or      or
   
     my $status = $resource->status($_);      my $status = $resource->status($part);
   
     ... use it here ...      ... use it here ...
  }   }
Removed from v.1.383  
changed lines
  Added in v.1.400

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