Chris@0: <?php
Chris@0: 
Chris@0: namespace Drupal\user\Plugin\LanguageNegotiation;
Chris@0: 
Chris@0: use Drupal\language\LanguageNegotiationMethodBase;
Chris@0: use Symfony\Component\HttpFoundation\Request;
Chris@0: 
Chris@0: /**
Chris@0:  * Class for identifying language from the user preferences.
Chris@0:  *
Chris@0:  * @LanguageNegotiation(
Chris@0:  *   id = \Drupal\user\Plugin\LanguageNegotiation\LanguageNegotiationUser::METHOD_ID,
Chris@0:  *   weight = -4,
Chris@0:  *   name = @Translation("User"),
Chris@0:  *   description = @Translation("Follow the user's language preference.")
Chris@0:  * )
Chris@0:  */
Chris@0: class LanguageNegotiationUser extends LanguageNegotiationMethodBase {
Chris@0: 
Chris@0:   /**
Chris@0:    * The language negotiation method id.
Chris@0:    */
Chris@0:   const METHOD_ID = 'language-user';
Chris@0: 
Chris@0:   /**
Chris@0:    * {@inheritdoc}
Chris@0:    */
Chris@0:   public function getLangcode(Request $request = NULL) {
Chris@0:     $langcode = NULL;
Chris@0: 
Chris@0:     // User preference (only for authenticated users).
Chris@0:     if ($this->languageManager && $this->currentUser->isAuthenticated()) {
Chris@17:       $preferred_langcode = $this->currentUser->getPreferredLangcode(FALSE);
Chris@0:       $languages = $this->languageManager->getLanguages();
Chris@17:       if (!empty($preferred_langcode) && isset($languages[$preferred_langcode])) {
Chris@0:         $langcode = $preferred_langcode;
Chris@0:       }
Chris@0:     }
Chris@0: 
Chris@0:     // No language preference from the user.
Chris@0:     return $langcode;
Chris@0:   }
Chris@0: 
Chris@0: }