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9aa9080756
Autolinking of glossaries, activity, resources and wiki names were using a trivial single-entry cache implemented with static vars. The cache was _not_ keyed on course. This bug was visible during forum_cron() which walks many courses. The cache would get "stuck" on the first course that had something to put in the cache. All mailouts from there onwards would autolink to stuff in the wrong course.
60 lines
2 KiB
PHP
60 lines
2 KiB
PHP
<?php // $Id$
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//This function provides automatic linking to
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//resources when its name (title) is found inside every Moodle text
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//Williams, Stronk7, Martin D
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function resource_filter($courseid, $text) {
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global $CFG;
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// Trivial-cache - keyed on $cachedcourseid
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static $nothingtodo;
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static $resourcelist;
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static $cachedcourseid;
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// if we don't have a courseid, we can't run the query, so
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if (empty($courseid)) {
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return $text;
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}
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// Initialise/invalidate our trivial cache if dealing with a different course
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if (!isset($cachedcourseid) || $cachedcourseid !== (int)$courseid) {
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$resourcelist = array();
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$nothingtodo = false;
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}
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$cachedcourseid = (int)$courseid;
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if ($nothingtodo === true) {
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return $text;
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}
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/// Create a list of all the resources to search for. It may be cached already.
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if (empty($resourcelist)) {
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/// The resources are sorted from long to short so longer ones can be linked first.
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if (!$resources = get_records('resource', 'course', $courseid, 'CHAR_LENGTH(name) DESC', 'id,name')) {
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$nothingtodo = true;
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return $text;
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}
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$resourcelist = array();
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foreach ($resources as $resource) {
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$currentname = trim($resource->name);
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$strippedname = strip_tags($currentname);
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/// Avoid empty or unlinkable resource names
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if (!empty($strippedname)) {
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$resourcelist[] = new filterobject($currentname,
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'<a class="resource autolink" title="'.$strippedname.'" href="'.
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$CFG->wwwroot.'/mod/resource/view.php?r='.$resource->id.'" '.$CFG->frametarget.'>',
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'</a>', false, true);
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}
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}
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}
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return filter_phrases($text, $resourcelist); // Look for all these links in the text
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}
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?>
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