PHP ArtefactType::delete_by_artefacttype方法代码示例

/**
 * Deletes a group.
 *
 * All group deleting should be done through this function, even though it is
 * simple. What is required to perform group deletion may change over time.
 *
 * @param int $groupid The group to delete
 * @param string $shortname   shortname of the group
 * @param string $institution institution of the group
 *
 * {{@internal Maybe later we can have a group_can_be_deleted function if
 * necessary}}
 */
function group_delete($groupid, $shortname = null, $institution = null, $notifymembers = true)
{
    if (empty($groupid) && !empty($institution) && !is_null($shortname) && strlen($shortname)) {
        // External call to delete a group, check permission of $USER.
        global $USER;
        if (!$USER->can_edit_institution($institution)) {
            throw new AccessDeniedException("group_delete: cannot delete a group in this institution");
        }
        $group = get_record('group', 'shortname', $shortname, 'institution', $institution);
    } else {
        $groupid = group_param_groupid($groupid);
        $group = get_record('group', 'id', $groupid);
    }
    db_begin();
    // Leave the group_member table alone, it's needed for the deleted
    // group notification that's about to happen on cron.
    delete_records('group_member_invite', 'group', $group->id);
    delete_records('group_member_request', 'group', $group->id);
    delete_records('view_access', 'group', $group->id);
    // Delete views owned by the group
    require_once get_config('libroot') . 'view.php';
    foreach (get_column('view', 'id', 'group', $group->id) as $viewid) {
        $view = new View($viewid);
        $view->delete();
    }
    // Release views submitted to the group
    foreach (get_column('view', 'id', 'submittedgroup', $group->id) as $viewid) {
        $view = new View($viewid);
        $view->release();
    }
    // Delete artefacts
    require_once get_config('docroot') . 'artefact/lib.php';
    ArtefactType::delete_by_artefacttype(get_column('artefact', 'id', 'group', $group->id));
    // Delete forums
    require_once get_config('docroot') . 'interaction/lib.php';
    foreach (get_column('interaction_instance', 'id', 'group', $group->id) as $forumid) {
        $forum = interaction_instance_from_id($forumid);
        $forum->delete();
    }
    if ($notifymembers) {
        require_once 'activity.php';
        activity_occurred('groupmessage', array('group' => $group->id, 'deletedgroup' => true, 'strings' => (object) array('subject' => (object) array('key' => 'deletegroupnotificationsubject', 'section' => 'group', 'args' => array(hsc($group->name))), 'message' => (object) array('key' => 'deletegroupnotificationmessage', 'section' => 'group', 'args' => array(hsc($group->name), get_config('sitename'))))));
    }
    // make sure the group name + deleted suffix will fit within 128 chars
    $delete_name = $group->name;
    if (strlen($delete_name) > 100) {
        $delete_name = substr($delete_name, 0, 100) . '(...)';
    }
    update_record('group', array('deleted' => 1, 'name' => $delete_name . '.deleted.' . time(), 'shortname' => null, 'institution' => null, 'category' => null, 'urlid' => null), array('id' => $group->id));
    db_commit();
}

 public function delete()
 {
     // ArtefactType::delete() deletes all the child artefacts one by one.
     // If the folder contains a lot of artefacts, it's too slow to do this
     // but for very small directories it seems to be slightly faster.
     $descendants = artefact_get_descendants(array($this->id));
     if (count($descendants) < 10) {
         parent::delete();
     } else {
         ArtefactType::delete_by_artefacttype($descendants);
     }
 }