/**
* Detect available locale
*
* @param RequestInterface $request
* @param ResponseInterface $response
* @return ResponseInterface|string
*/
public function detect(RequestInterface $request, ResponseInterface $response = null)
{
$event = new Event(Event::EVENT_DETECT, $this);
$event->setRequest($request);
$event->setResponse($response);
if ($this->hasLocales()) {
$event->setLocales($this->getLocales());
}
$eventManager = $this->getEventManager();
$results = $eventManager->trigger($event, function ($r) {
return is_string($r);
});
if ($results->stopped()) {
$locale = $results->last();
} else {
$locale = $this->getDefault();
}
if ($this->hasLocales() && !$this->hasLocale($locale)) {
$locale = $this->getDefault();
}
// Trigger FOUND event only when a response is given
if ($response instanceof ResponseInterface) {
$event->setName(Event::EVENT_FOUND);
$event->setLocale($locale);
$return = false;
/**
* The response will be returned instead of the found locale
* only in case a adapter returned the response. This is an
* indication the adapter has updated the response (e.g. with
* a Location header) and as such, the response must be returned
* instead of the locale.
*/
$eventManager->trigger($event, function ($r) use(&$return) {
if ($r instanceof ResponseInterface) {
$return = true;
}
});
if ($return) {
return $response;
}
}
return $locale;
}
