/**
* Validates the alias.
*/
protected function validateAlias()
{
// build alias automatically
if (empty($this->alias)) {
$titles = I18nHandler::getInstance()->getValues('title');
// prefer english aliases, otherwise use default language
$language = LanguageFactory::getInstance()->getLanguageByCode('en');
if ($language === null) {
$language = LanguageFactory::getInstance()->getLanguage(LanguageFactory::getInstance()->getDefaultLanguageID());
}
$this->alias = PageUtil::buildAlias($titles[$language->languageID]);
}
if (!PageUtil::isValidAlias($this->alias)) {
throw new UserInputException('alias', 'notValid');
}
if (!PageUtil::isAvailableAlias($this->alias, $this->parentID ?: null)) {
throw new UserInputException('alias', 'notUnique');
}
}
