/**
* getSaveData()
* overwrite FrontendModule::getSaveData
*/
public function getSaveData($mData)
{
$oFlash = new Flash($mData);
$oFlash->checkForValue(self::DISPLAY_MODE, 'display_mode_required');
if ($mData['display_mode'] !== 'newsletter_unsubscribe') {
$oFlash->checkForValue('subscriber_group_id', 'subscriber_group_required');
}
$oFlash->finishReporting();
if ($oFlash->hasMessages()) {
throw new ValidationException($oFlash);
}
return parent::getSaveData($mData);
}