filter/activitynames/filter.php

   1 <?php // $Id$
   2     //This function provides automatic linking to
   3     //activities when its name (title) is found inside every Moodle text
   4     //It's based in the glosssary filter by Williams Castillo
   5     //Modifications by stronk7.
   6
   7     function activitynames_filter($courseid, $text) {
   8
   9         global $CFG;
  10
  11         // Trivial-cache - keyed on $cachedcourseid
  12         static $activitylist;
  13         static $cachedcourseid;
  14
  15         if (empty($courseid)) {
  16             $courseid = SITEID;
  17         }
  18
  19         // Initialise/invalidate our trivial cache if dealing with a different course
  20         if (!isset($cachedcourseid) || $cachedcourseid !== (int)$courseid) {
  21             $activitylist = array();
  22         }
  23         $cachedcourseid = (int)$courseid;
  24
  25         /// It may be cached
  26
  27         if (empty($activitylist)) {
  28
  29             $course = get_record("course","id",$courseid);
  30         /// Casting $course->modinfo to string prevents one notice when the field is null
  31             $modinfo = unserialize((string)$course->modinfo);
  32
  33             if (!empty($modinfo)) {
  34
  35                 $activitylist = array();      /// We will store all the activities here
  36
  37                 //Sort modinfo by name length
  38                 usort($modinfo,'comparemodulenamesbylength');
  39
  40                 foreach ($modinfo as $activity) {
  41                     //Exclude labels and hidden items
  42                     if ($activity->mod != "label" && $activity->visible) {
  43                         $title = trim(strip_tags(urldecode($activity->name)));
  44                         /// Avoid empty or unlinkable activity names
  45                         if (!empty($title)) {
  46                             $title = str_replace('"', "'", $title);
  47                             $href_tag_begin = "<a class=\"autolink\" title=\"$title\" href=\"$CFG->wwwroot/mod/$activity->mod/view.php?id=$activity->cm\" $CFG->frametarget>";
  48                             $currentname = urldecode($activity->name);
  49                             if ($currentname = trim($currentname)) {
  50                                 $activitylist[] = new filterobject($currentname, $href_tag_begin, '</a>', false, true);
  51                             }
  52                         }
  53                     }
  54                 }
  55             }
  56         }
  57
  58         return $text = filter_phrases ($text, $activitylist);
  59     }
  60
  61
  62
  63     //This function is used to order module names from longer to shorter
  64     function comparemodulenamesbylength($a, $b)  {
  65         if (strlen($a->name) == strlen($b->name)) {
  66             return 0;
  67         }
  68         return (strlen($a->name) < strlen($b->name)) ? 1 : -1;
  69     }
  70 ?>