/**
* Permanently deletes all non-standard tags that no longer have any instances pointing to them
*
* @param array $collections optional list of tag collections ids to cleanup
*/
public static function cleanup_unused_tags($collections = null)
{
global $DB, $CFG;
$params = array();
$sql = "SELECT tg.id FROM {tag} tg LEFT OUTER JOIN {tag_instance} ti ON ti.tagid = tg.id\n WHERE ti.id IS NULL AND tg.isstandard = 0";
if ($collections) {
list($sqlcoll, $params) = $DB->get_in_or_equal($collections, SQL_PARAMS_NAMED);
$sql .= " AND tg.tagcollid " . $sqlcoll;
}
if ($unusedtags = $DB->get_fieldset_sql($sql, $params)) {
core_tag_tag::delete_tags($unusedtags);
}
}
/**
* Delete one or more tag, and all their instances if there are any left.
*
* @package core_tag
* @deprecated since 3.1
* @param mixed $tagids one tagid (int), or one array of tagids to delete
* @return bool true on success, false otherwise
*/
function tag_delete($tagids)
{
debugging('Method tag_delete() is deprecated, use core_tag_tag::delete_tags()', DEBUG_DEVELOPER);
return core_tag_tag::delete_tags($tagids);
}
case 'areasetshowstandard':
if ($tagarea) {
require_sesskey();
if (($showstandard = optional_param('showstandard', null, PARAM_INT)) !== null) {
core_tag_area::update($tagarea, array('showstandard' => $showstandard));
redirect(new moodle_url($manageurl, array('notice' => 'changessaved')));
}
}
redirect($manageurl);
break;
case 'delete':
require_sesskey();
if (!$tagschecked && $tagid) {
$tagschecked = array($tagid);
}
core_tag_tag::delete_tags($tagschecked);
redirect(new moodle_url($PAGE->url, $tagschecked ? array('notice' => 'deleted') : null));
break;
case 'setflag':
require_sesskey();
if ($tagid) {
$tagobject->flag();
redirect(new moodle_url($PAGE->url, array('notice' => 'flagged')));
}
redirect($PAGE->url);
break;
case 'resetflag':
require_sesskey();
if ($tagid) {
$tagobject->reset_flag();
redirect(new moodle_url($PAGE->url, array('notice' => 'resetflag')));
