$checkBox = $this->_input->filterSingle('userBox', XenForo_Input::BOOLEAN);
           
            if ($checkBox)
            {           
               $messageId = XenForo_Application::get('options')->messageId;
           
               $dw = XenForo_DataWriter::create('Test_DataWriter_Test');
               $dw->set('user_id', 2);
               $dw->set('username', 'hakdi');
               $dw->save();
            }
            else
            {
                $dw = XenForo_DataWriter::create('Test_DataWriter_Test');
               $dw->set('user_id', $visitor['user_id']);
               $dw->set('username', $visitor['user_id'] > 0 ? $visitor['username'] : new XenForo_Phrase('guest'));
               $dw->save();
            }