. /** * This filter provides automatic linking to * activities when its name (title) is found inside every Moodle text * * @package filter * @subpackage activitynames * @copyright 2004 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com} * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later */ defined('MOODLE_INTERNAL') || die(); /** * Activity name filtering */ class filter_activitynames extends moodle_text_filter { // Trivial-cache - keyed on $cachedcourseid and $cacheduserid. static $activitylist = null; static $cachedcourseid; static $cacheduserid; function filter($text, array $options = array()) { global $USER; // Since 2.7 we can finally start using globals in filters. $coursectx = $this->context->get_course_context(false); if (!$coursectx) { return $text; } $courseid = $coursectx->instanceid; // Initialise/invalidate our trivial cache if dealing with a different course. if (!isset(self::$cachedcourseid) || self::$cachedcourseid !== (int)$courseid) { self::$activitylist = null; } self::$cachedcourseid = (int)$courseid; // And the same for user id. if (!isset(self::$cacheduserid) || self::$cacheduserid !== (int)$USER->id) { self::$activitylist = null; } self::$cacheduserid = (int)$USER->id; /// It may be cached if (is_null(self::$activitylist)) { self::$activitylist = array(); $modinfo = get_fast_modinfo($courseid); if (!empty($modinfo->cms)) { self::$activitylist = array(); // We will store all the created filters here. // Create array of visible activities sorted by the name length (we are only interested in properties name and url). $sortedactivities = array(); foreach ($modinfo->cms as $cm) { // Use normal access control and visibility, but exclude labels and hidden activities. if ($cm->visible and $cm->has_view() and $cm->uservisible) { $sortedactivities[] = (object)array( 'name' => $cm->name, 'url' => $cm->url, 'id' => $cm->id, 'namelen' => -strlen($cm->name), // Negative value for reverse sorting. ); } } // Sort activities by the length of the activity name in reverse order. core_collator::asort_objects_by_property($sortedactivities, 'namelen', core_collator::SORT_NUMERIC); foreach ($sortedactivities as $cm) { $title = s(trim(strip_tags($cm->name))); $currentname = trim($cm->name); $entitisedname = s($currentname); // Avoid empty or unlinkable activity names. if (!empty($title)) { $href_tag_begin = html_writer::start_tag('a', array('class' => 'autolink', 'title' => $title, 'href' => $cm->url)); self::$activitylist[$cm->id] = new filterobject($currentname, $href_tag_begin, '', false, true); if ($currentname != $entitisedname) { // If name has some entity (& " < >) add that filter too. MDL-17545. self::$activitylist[$cm->id.'-e'] = new filterobject($entitisedname, $href_tag_begin, '', false, true); } } } } } $filterslist = array(); if (self::$activitylist) { $cmid = $this->context->instanceid; if ($this->context->contextlevel == CONTEXT_MODULE && isset(self::$activitylist[$cmid])) { // remove filterobjects for the current module $filterslist = array_values(array_diff_key(self::$activitylist, array($cmid => 1, $cmid.'-e' => 1))); } else { $filterslist = array_values(self::$activitylist); } } if ($filterslist) { return $text = filter_phrases($text, $filterslist); } else { return $text; } } }