yaffs.net Git - yaffs-website/blob - web/core/modules/node/src/EventSubscriber/NodeTranslationExceptionSubscriber.php

   1 <?php
   2
   3 namespace Drupal\node\EventSubscriber;
   4
   5 use Drupal\Core\KeyValueStore\KeyValueFactoryInterface;
   6 use Drupal\Core\Language\LanguageManagerInterface;
   7 use Drupal\Core\ParamConverter\ParamNotConvertedException;
   8 use Drupal\Core\Routing\UrlGeneratorInterface;
   9 use Drupal\Core\State\StateInterface;
  10 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
  11 use Symfony\Component\HttpFoundation\RedirectResponse;
  12 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
  13 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
  14 use Symfony\Component\HttpKernel\KernelEvents;
  15
  16 /**
  17  * Redirect node translations that have been consolidated by migration.
  18  *
  19  * If we migrated node translations from Drupal 6 or 7, these nodes are now
  20  * combined with their source language node. Since there still might be
  21  * references to the URLs of these now consolidated nodes, this service catches
  22  * the 404s and try to redirect them to the right node in the right language.
  23  *
  24  * The mapping of the old nids to the new ones is made by the
  25  * NodeTranslationMigrateSubscriber class during the migration and is stored
  26  * in the "node_translation_redirect" key/value collection.
  27  *
  28  * @see \Drupal\node\NodeServiceProvider
  29  * @see \Drupal\node\EventSubscriber\NodeTranslationMigrateSubscriber
  30  */
  31 class NodeTranslationExceptionSubscriber implements EventSubscriberInterface {
  32
  33   /**
  34    * The key value factory.
  35    *
  36    * @var \Drupal\Core\KeyValueStore\KeyValueFactoryInterface
  37    */
  38   protected $keyValue;
  39
  40   /**
  41    * The language manager.
  42    *
  43    * @var \Drupal\Core\Language\LanguageManagerInterface
  44    */
  45   protected $languageManager;
  46
  47   /**
  48    * The URL generator.
  49    *
  50    * @var \Drupal\Core\Routing\UrlGeneratorInterface
  51    */
  52   protected $urlGenerator;
  53
  54   /**
  55    * The state service.
  56    *
  57    * @var \Drupal\Core\State\StateInterface
  58    */
  59   protected $state;
  60
  61   /**
  62    * Constructs the NodeTranslationExceptionSubscriber.
  63    *
  64    * @param \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value
  65    *   The key value factory.
  66    * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
  67    *   The language manager.
  68    * @param \Drupal\Core\Routing\UrlGeneratorInterface $url_generator
  69    *   The URL generator.
  70    * @param \Drupal\Core\State\StateInterface $state
  71    *   The state service.
  72    */
  73   public function __construct(KeyValueFactoryInterface $key_value, LanguageManagerInterface $language_manager, UrlGeneratorInterface $url_generator, StateInterface $state) {
  74     $this->keyValue = $key_value;
  75     $this->languageManager = $language_manager;
  76     $this->urlGenerator = $url_generator;
  77     $this->state = $state;
  78   }
  79
  80   /**
  81    * Redirects not found node translations using the key value collection.
  82    *
  83    * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
  84    *   The exception event.
  85    */
  86   public function onException(GetResponseForExceptionEvent $event) {
  87     $exception = $event->getException();
  88
  89     // If this is not a 404, we don't need to check for a redirection.
  90     if (!($exception instanceof NotFoundHttpException)) {
  91       return;
  92     }
  93
  94     $previous_exception = $exception->getPrevious();
  95     if ($previous_exception instanceof ParamNotConvertedException) {
  96       $route_name = $previous_exception->getRouteName();
  97       $parameters = $previous_exception->getRawParameters();
  98       if ($route_name === 'entity.node.canonical' && isset($parameters['node'])) {
  99         // If the node_translation_redirect state is not set, we don't need to check
 100         // for a redirection.
 101         if (!$this->state->get('node_translation_redirect')) {
 102           return;
 103         }
 104         $old_nid = $parameters['node'];
 105         $collection = $this->keyValue->get('node_translation_redirect');
 106         if ($old_nid && $value = $collection->get($old_nid)) {
 107           list($nid, $langcode) = $value;
 108           $language = $this->languageManager->getLanguage($langcode);
 109           $url = $this->urlGenerator->generateFromRoute('entity.node.canonical', ['node' => $nid], ['language' => $language]);
 110           $response = new RedirectResponse($url, 301);
 111           $event->setResponse($response);
 112         }
 113       }
 114     }
 115   }
 116
 117   /**
 118    * {@inheritdoc}
 119    */
 120   public static function getSubscribedEvents() {
 121     $events = [];
 122
 123     $events[KernelEvents::EXCEPTION] = ['onException'];
 124
 125     return $events;
 126   }
 127
 128 }