/**
  * @test
  * @dataProvider sampleHttpAcceptLanguageHeaders
  */
 public function detectingBestMatchingLocaleFromHttpAcceptLanguageHeaderWorksCorrectly($acceptLanguageHeader, $expectedResult)
 {
     $locale = $this->detector->detectLocaleFromHttpHeader($acceptLanguageHeader);
     $this->assertEquals($expectedResult, $locale);
 }
 /**
  * @param ComponentContext $componentContext
  * @return void
  */
 public function handle(ComponentContext $componentContext)
 {
     $httpRequest = $componentContext->getHttpRequest();
     $requestPath = $httpRequest->getUri()->getPath();
     $firstRequestPathSegment = explode('/', ltrim($requestPath, '/'))[0];
     //Check if url contains user, if so, don't detect language
     if (strpos($requestPath, '@user-')) {
         return;
     }
     if (isset($this->options['allowedMethods']) && !in_array($httpRequest->getMethod(), $this->options['allowedMethods'])) {
         //the current HTTP method is not within the allow methods, abort!
         return;
     }
     $preset = null;
     if (!isset($this->options['ignoreSegments']) || !in_array($firstRequestPathSegment, $this->options['ignoreSegments'])) {
         $preset = $this->findPreset($firstRequestPathSegment);
         if ($preset !== null) {
             //uri contains a valid language segment => no need for us to proceed
             return;
         }
     } else {
         //the configuration told us to ignore this segment => no need for us to proceed
         return;
     }
     $defaultPreset = $this->contentDimensionPresetSource->getDefaultPreset('language');
     $referer = $httpRequest->getHeaders()->get('Referer');
     $refererInfo = $this->parseUriInfo($referer);
     $currentInfo = $this->parseUriInfo((string) $httpRequest->getUri());
     $varnishInfo = isset($this->varnishSettings['varnishUrl']) ? $this->parseUriInfo($this->varnishSettings['varnishUrl']) : null;
     if ($refererInfo['host'] == $currentInfo['host'] || $varnishInfo !== null && $refererInfo['host'] == $varnishInfo['host']) {
         $firstRefererRequestPathSegment = explode('/', ltrim($refererInfo['requestPath'], '/'))[0];
         $refererPreset = $preset = $this->findPreset($firstRefererRequestPathSegment);
         if (empty($firstRequestPathSegment) && $refererPreset !== null && empty(ltrim(str_replace($firstRefererRequestPathSegment, '', $refererInfo['requestPath']), '/'))) {
             $preset = $defaultPreset;
         } else {
             $preset = $refererPreset;
         }
     } else {
         $detectedLocale = $this->localeDetector->detectLocaleFromHttpHeader($httpRequest->getHeader('Accept-Language'));
         if ($detectedLocale instanceof Locale) {
             $preset = $this->findPreset($detectedLocale->getLanguage());
             if ($preset !== null && empty(trim($requestPath, " \t\n\r\v/")) && $preset['uriSegment'] == $defaultPreset['uriSegment']) {
                 //we're on the homepage, and the browsers language is equal to the default language => no need for us to proceed
                 return;
             }
         }
     }
     if ($preset === null) {
         $preset = $defaultPreset;
     }
     if ($preset === null) {
         throw new Exception("Couldn't resolve the language and default language is not set. Check your language config.");
         return;
     }
     $uri = $httpRequest->getUri();
     if (isset($this->httpSettings['baseUri'])) {
         $baseInfo = $this->parseUriInfo($this->httpSettings['baseUri']);
         $uri->setHost($baseInfo['host']);
     }
     if (isset($this->httpSettings['port'])) {
         $uri->setPort($this->httpSettings['port']);
     }
     if (isset($this->httpSettings['username'])) {
         $uri->setUsername($this->httpSettings['username']);
     }
     if (isset($this->httpSettings['password'])) {
         $uri->setUsername($this->httpSettings['password']);
     }
     $uri->setPath('/' . $preset['uriSegment'] . $requestPath);
     $response = $componentContext->getHttpResponse();
     $response->setContent(sprintf('<html><head><meta http-equiv="refresh" content="0;url=%s"/></head></html>', htmlentities((string) $uri, ENT_QUOTES, 'utf-8')));
     $response->setHeader('Location', (string) $uri);
     $componentContext->setParameter(ComponentChain::class, 'cancel', TRUE);
 }