poltawski
75 lines
2.6 KiB
PHP
75 lines
2.6 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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/* get all non-hidden resources from this course
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* sorted from long to short so longer ones can be
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* linked first. And order by section so we try to
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* link to the top resource first.
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*/
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$resource_sql = "SELECT r.id, r.name
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FROM {$CFG->prefix}resource r,
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{$CFG->prefix}course_modules cm,
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{$CFG->prefix}modules m
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WHERE m.name = 'resource' AND
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cm.module = m.id AND
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cm.visible = 1 AND
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r.id = cm.instance AND
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cm.course = {$courseid}
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ORDER BY CHAR_LENGTH(r.name) DESC, cm.section ASC;";
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if (!$resources = get_records_sql($resource_sql) ){
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$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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