public static function VerifyFieldName(&$fieldName, XenForo_DataWriter $dw, $inputName = false)
{
if (preg_match('/[^a-zA-Z0-9_]/', $fieldName)) {
$dw->error(new XenForo_Phrase('please_enter_an_id_using_only_alphanumeric'), $inputName);
return false;
}
if ($fieldName !== $dw->getExisting('field_name')) {
$fieldModel = XenForo_Model::create('LiquidPro_SimpleForms_Model_Field');
if (in_array($dw->get('type'), array('global', 'template'))) {
$existingField = $fieldModel->getFieldByTypeAndName($dw->get('type'), $fieldName);
} else {
$existingField = $fieldModel->getFieldByFormIdAndName($dw->get('form_id'), $fieldName);
}
}
if (isset($existingField) && $existingField) {
$dw->error(new XenForo_Phrase('field_ids_must_be_unique'), $inputName);
return false;
}
return true;
}
