public function index_onBulkAction()
    {
        if (
            ($bulkAction = post('action')) &&
            ($checkedIds = post('checked')) &&
            is_array($checkedIds) &&
            count($checkedIds)
        ) {

            foreach ($checkedIds as $userId) {
                if (!$user = User::withTrashed()->find($userId)) {
                    continue;
                }

                switch ($bulkAction) {
                    case 'delete':
                        $user->forceDelete();
                        break;

                    case 'activate':
                        $user->attemptActivation($user->activation_code);
                        break;

                    case 'deactivate':
                        $user->delete();
                        break;

                    case 'restore':
                        $user->restore();
                        break;

                    case 'ban':
                        $user->ban();
                        break;

                    case 'unban':
                        $user->unban();
                        break;
                }
            }

            Flash::success(Lang::get('rainlab.user::lang.users.'.$bulkAction.'_selected_success'));
        }
        else {
            Flash::error(Lang::get('rainlab.user::lang.users.'.$bulkAction.'_selected_empty'));
        }

        return $this->listRefresh();
    }