LanguageNegotiationBrowser.php in Zircon Profile 8

Contains \Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationBrowser.

Namespace

Drupal\language\Plugin\LanguageNegotiation

File

core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationBrowser.php

<?php

/**
 * @file
 * Contains \Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationBrowser.
 */
namespace Drupal\language\Plugin\LanguageNegotiation;

use Drupal\Component\Utility\UserAgent;
use Drupal\language\LanguageNegotiationMethodBase;
use Symfony\Component\HttpFoundation\Request;

/**
 * Class for identifying language from the browser Accept-language HTTP header.
 *
 * @LanguageNegotiation(
 *   id = \Drupal\language\Plugin\LanguageNegotiation\LanguageNegotiationBrowser::METHOD_ID,
 *   weight = -2,
 *   name = @Translation("Browser"),
 *   description = @Translation("Language from the browser's language settings."),
 *   config_route_name = "language.negotiation_browser"
 * )
 */
class LanguageNegotiationBrowser extends LanguageNegotiationMethodBase {

  /**
   * The language negotiation method id.
   */
  const METHOD_ID = 'language-browser';

  /**
   * {@inheritdoc}
   */
  public function getLangcode(Request $request = NULL) {
    $langcode = NULL;
    if ($this->languageManager && $request && $request->server
      ->get('HTTP_ACCEPT_LANGUAGE')) {
      $http_accept_language = $request->server
        ->get('HTTP_ACCEPT_LANGUAGE');
      $langcodes = array_keys($this->languageManager
        ->getLanguages());
      $mappings = $this->config
        ->get('language.mappings')
        ->get('map');
      $langcode = UserAgent::getBestMatchingLangcode($http_accept_language, $langcodes, $mappings);

      // Internal page cache with multiple languages and browser negotiation
      // could lead to wrong cached sites. Therefore disabling the internal
      // page cache.
      // @todo Solve more elegantly in https://www.drupal.org/node/2430335.
      \Drupal::service('page_cache_kill_switch')
        ->trigger();
    }
    return $langcode;
  }

}

Classes

Name	Description
LanguageNegotiationBrowser	Class for identifying language from the browser Accept-language HTTP header.