annotate core/modules/node/src/EventSubscriber/NodeTranslationExceptionSubscriber.php @ 19:fa3358dc1485 tip

Add ndrum files
author Chris Cannam
date Wed, 28 Aug 2019 13:14:47 +0100
parents 4c8ae668cc8c
children
rev   line source
Chris@0 1 <?php
Chris@0 2
Chris@0 3 namespace Drupal\node\EventSubscriber;
Chris@0 4
Chris@0 5 use Drupal\Core\KeyValueStore\KeyValueFactoryInterface;
Chris@0 6 use Drupal\Core\Language\LanguageManagerInterface;
Chris@0 7 use Drupal\Core\ParamConverter\ParamNotConvertedException;
Chris@0 8 use Drupal\Core\Routing\UrlGeneratorInterface;
Chris@0 9 use Drupal\Core\State\StateInterface;
Chris@0 10 use Symfony\Component\EventDispatcher\EventSubscriberInterface;
Chris@0 11 use Symfony\Component\HttpFoundation\RedirectResponse;
Chris@0 12 use Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent;
Chris@0 13 use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
Chris@0 14 use Symfony\Component\HttpKernel\KernelEvents;
Chris@0 15
Chris@0 16 /**
Chris@0 17 * Redirect node translations that have been consolidated by migration.
Chris@0 18 *
Chris@0 19 * If we migrated node translations from Drupal 6 or 7, these nodes are now
Chris@0 20 * combined with their source language node. Since there still might be
Chris@0 21 * references to the URLs of these now consolidated nodes, this service catches
Chris@0 22 * the 404s and try to redirect them to the right node in the right language.
Chris@0 23 *
Chris@0 24 * The mapping of the old nids to the new ones is made by the
Chris@0 25 * NodeTranslationMigrateSubscriber class during the migration and is stored
Chris@0 26 * in the "node_translation_redirect" key/value collection.
Chris@0 27 *
Chris@0 28 * @see \Drupal\node\NodeServiceProvider
Chris@0 29 * @see \Drupal\node\EventSubscriber\NodeTranslationMigrateSubscriber
Chris@0 30 */
Chris@0 31 class NodeTranslationExceptionSubscriber implements EventSubscriberInterface {
Chris@0 32
Chris@0 33 /**
Chris@0 34 * The key value factory.
Chris@0 35 *
Chris@0 36 * @var \Drupal\Core\KeyValueStore\KeyValueFactoryInterface
Chris@0 37 */
Chris@0 38 protected $keyValue;
Chris@0 39
Chris@0 40 /**
Chris@0 41 * The language manager.
Chris@0 42 *
Chris@0 43 * @var \Drupal\Core\Language\LanguageManagerInterface
Chris@0 44 */
Chris@0 45 protected $languageManager;
Chris@0 46
Chris@0 47 /**
Chris@0 48 * The URL generator.
Chris@0 49 *
Chris@0 50 * @var \Drupal\Core\Routing\UrlGeneratorInterface
Chris@0 51 */
Chris@0 52 protected $urlGenerator;
Chris@0 53
Chris@0 54 /**
Chris@0 55 * The state service.
Chris@0 56 *
Chris@0 57 * @var \Drupal\Core\State\StateInterface
Chris@0 58 */
Chris@0 59 protected $state;
Chris@0 60
Chris@0 61 /**
Chris@0 62 * Constructs the NodeTranslationExceptionSubscriber.
Chris@0 63 *
Chris@0 64 * @param \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value
Chris@0 65 * The key value factory.
Chris@0 66 * @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
Chris@0 67 * The language manager.
Chris@0 68 * @param \Drupal\Core\Routing\UrlGeneratorInterface $url_generator
Chris@0 69 * The URL generator.
Chris@0 70 * @param \Drupal\Core\State\StateInterface $state
Chris@0 71 * The state service.
Chris@0 72 */
Chris@0 73 public function __construct(KeyValueFactoryInterface $key_value, LanguageManagerInterface $language_manager, UrlGeneratorInterface $url_generator, StateInterface $state) {
Chris@0 74 $this->keyValue = $key_value;
Chris@0 75 $this->languageManager = $language_manager;
Chris@0 76 $this->urlGenerator = $url_generator;
Chris@0 77 $this->state = $state;
Chris@0 78 }
Chris@0 79
Chris@0 80 /**
Chris@0 81 * Redirects not found node translations using the key value collection.
Chris@0 82 *
Chris@0 83 * @param \Symfony\Component\HttpKernel\Event\GetResponseForExceptionEvent $event
Chris@0 84 * The exception event.
Chris@0 85 */
Chris@0 86 public function onException(GetResponseForExceptionEvent $event) {
Chris@0 87 $exception = $event->getException();
Chris@0 88
Chris@0 89 // If this is not a 404, we don't need to check for a redirection.
Chris@0 90 if (!($exception instanceof NotFoundHttpException)) {
Chris@0 91 return;
Chris@0 92 }
Chris@0 93
Chris@0 94 $previous_exception = $exception->getPrevious();
Chris@0 95 if ($previous_exception instanceof ParamNotConvertedException) {
Chris@0 96 $route_name = $previous_exception->getRouteName();
Chris@0 97 $parameters = $previous_exception->getRawParameters();
Chris@0 98 if ($route_name === 'entity.node.canonical' && isset($parameters['node'])) {
Chris@0 99 // If the node_translation_redirect state is not set, we don't need to check
Chris@0 100 // for a redirection.
Chris@0 101 if (!$this->state->get('node_translation_redirect')) {
Chris@0 102 return;
Chris@0 103 }
Chris@0 104 $old_nid = $parameters['node'];
Chris@0 105 $collection = $this->keyValue->get('node_translation_redirect');
Chris@0 106 if ($old_nid && $value = $collection->get($old_nid)) {
Chris@0 107 list($nid, $langcode) = $value;
Chris@0 108 $language = $this->languageManager->getLanguage($langcode);
Chris@0 109 $url = $this->urlGenerator->generateFromRoute('entity.node.canonical', ['node' => $nid], ['language' => $language]);
Chris@0 110 $response = new RedirectResponse($url, 301);
Chris@0 111 $event->setResponse($response);
Chris@0 112 }
Chris@0 113 }
Chris@0 114 }
Chris@0 115 }
Chris@0 116
Chris@0 117 /**
Chris@0 118 * {@inheritdoc}
Chris@0 119 */
Chris@0 120 public static function getSubscribedEvents() {
Chris@0 121 $events = [];
Chris@0 122
Chris@0 123 $events[KernelEvents::EXCEPTION] = ['onException'];
Chris@0 124
Chris@0 125 return $events;
Chris@0 126 }
Chris@0 127
Chris@0 128 }