diff core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationBrowser.php @ 0:4c8ae668cc8c

Initial import (non-working)

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/core/modules/language/src/Plugin/LanguageNegotiation/LanguageNegotiationBrowser.php	Wed Nov 29 16:09:58 2017 +0000
@@ -0,0 +1,48 @@
+<?php
+
+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;
+  }
+
+}