public static function addLanguageForm(AbstractLegacyBackend $backend, $user = null)
{
if (!$user) {
$user = User::getUser();
}
$languages = LanguageQuery::create()->useUserLanguageQuery()->filterByUser($user)->endUse()->find()->toKeyValue('Langcode', 'Name');
if (!count($languages)) {
throw new Exception('You do not have access to any languages.');
}
$langcode = null;
if (isset($_GET['langcode'])) {
$langcode = $_GET['langcode'];
}
if (!array_key_exists($langcode, $languages)) {
$langcode = null;
}
if ($langcode === null) {
$langcode = array_keys($languages);
$langcode = array_shift($langcode);
}
if (empty($_GET['action'])) {
header('cache-control: no-store');
// dont store state as this may cause problem with the form below
$backend->addMainContent(self::getLanguageForm($languages, $langcode));
}
return $langcode;
}
