function LanguageNegotiationSession::processOutbound

File

core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationSession.php, line 84

Class

LanguageNegotiationSession

Identify language from a request/session parameter.

Namespace

Code

public function processOutbound($path, &$options = [], Request $request = NULL, BubbleableMetadata $bubbleable_metadata = NULL) {
  if ($request) {
    // The following values are not supposed to change during a single page
    // request processing.
    if (!isset($this->queryRewrite)) {
      if ($this->currentUser
        ->isAnonymous()) {
        $languages = $this->languageManager
          ->getLanguages();
        $config = $this->config
          ->get('language.negotiation')
          ->get('session');
        $this->queryParam = $config['parameter'];
        $this->queryValue = $request->query
          ->has($this->queryParam) ? $request->query
          ->get($this->queryParam) : NULL;
        $this->queryRewrite = isset($languages[$this->queryValue]);
      }
      else {
        $this->queryRewrite = FALSE;
      }
    }
    // If the user is anonymous, the user language negotiation method is
    // enabled, and the corresponding option has been set, we must preserve
    // any explicit user language preference even with cookies disabled.
    if ($this->queryRewrite) {
      if (!isset($options['query'][$this->queryParam])) {
        $options['query'][$this->queryParam] = $this->queryValue;
      }
      if ($bubbleable_metadata) {
        // Cached URLs that have been processed by this outbound path
        // processor must be:
        $bubbleable_metadata->addCacheTags($this->config
          ->get('language.negotiation')
          ->getCacheTags())
          ->addCacheContexts([
          'url.query_args:' . $this->queryParam,
        ]);
      }
    }
  }
  return $path;
}