Newscoop\NewscoopBundle\EventListener\LocaleListener::onRequest PHP Method

    public function onRequest(GetResponseEvent $event)
    {
        $request = $event->getRequest();
        $pos = strpos($request->server->get('REQUEST_URI'), '/admin');
        $cookies = $request->cookies;
        if ($cookies->has('TOL_Language')) {
            $request->setLocale($cookies->get("TOL_Language"));
        }
        // Allow for overriding locale with get parameter
        if ($request->query->has('__set_lang')) {
            try {
                $language = $this->em->getRepository('Newscoop\\Entity\\Language')->findByRFC3066bis($request->query->get('__set_lang'), true);
                if ($language) {
                    $request->setLocale($language->getCode());
                    return;
                }
            } catch (\Exception $e) {
            }
        }
        // if it's not admin
        if ($pos === false) {
            // try to get locale from issue
            $issueMetadata = $request->attributes->get('_newscoop_issue_metadata');
            $issueLanguageCode = $issueMetadata['code_default_language'];
            if ($issueLanguageCode) {
                $request->setLocale($issueLanguageCode);
                return;
            }
            // try to get locale from publication but only if locale is not in url
            $publicationMetadata = $request->attributes->get('_newscoop_publication_metadata');
            $languageCode = $publicationMetadata['publication']['code_default_language'];
            $locale = $this->extractLocaleFromUri($request->getRequestUri());
            if (!$locale) {
                $request->setLocale($languageCode);
                return;
            }
            // get langauge from url and check if it's valid - if it's then set is as current locale
            $cacheKey = $this->cacheService->getCacheKey(array('resolver', $locale), 'language');
            if ($this->cacheService->contains($cacheKey)) {
                $language = $this->cacheService->fetch($cacheKey);
            } else {
                $language = $this->em->getRepository('Newscoop\\Entity\\Language')->findOneBy(array('code' => $locale));
                $this->cacheService->save($cacheKey, $language);
            }
            $request->setLocale(!is_null($language) ? $language->getCode() : $languageCode);
        }
    }