Ip\Internal\Grid\Model\Table::order PHP Method

    protected function order($params)
    {
        $statusVariables = $this->statusVariables;
        if (empty($params['order'])) {
            throw new \Ip\Exception('Missing parameters');
        }
        if (empty($statusVariables['order']) || $statusVariables['order'] != $params['order']) {
            //new field selected to order records. Use ascending order
            $statusVariables['order'] = $params['order'];
            unset($statusVariables['direction']);
        } else {
            //the same field has been clicked repeatedly.
            if (empty($statusVariables['direction']) || $statusVariables['direction'] == 'asc') {
                //the same field has been clicked twice. Change order direction to descending
                $statusVariables['order'] = $params['order'];
                $statusVariables['direction'] = 'desc';
            } else {
                //the same field has been clicked for the third time. Remove ordering
                unset($statusVariables['order']);
                unset($statusVariables['direction']);
            }
        }
        $commands = array();
        $commands[] = Commands::setHash(Status::build($statusVariables));
        return $commands;
    }