class NodeTranslationMigrateSubscriber in Drupal 8

Creates a key value collection for migrated node translation redirections.

If we are migrating node translations from Drupal 6 or 7, these nodes will be combined with their source node. Since there still might be references to the URLs of these now consolidated nodes, this service saves the mapping between the old nids to the new ones to be able to redirect them to the right node in the right language.

The mapping is stored in the "node_translation_redirect" key/value collection and the redirection is made by the NodeTranslationExceptionSubscriber class.

Hierarchy

• class \Drupal\node\EventSubscriber\NodeTranslationMigrateSubscriber implements \Symfony\Component\EventDispatcher\EventSubscriberInterface

See also

\Drupal\node\NodeServiceProvider

\Drupal\node\EventSubscriber\NodeTranslationExceptionSubscriber

1 file declares its use of NodeTranslationMigrateSubscriber

NodeServiceProvider.php in core/modules/node/src/NodeServiceProvider.php

File

core/modules/node/src/EventSubscriber/NodeTranslationMigrateSubscriber.php, line 28

Namespace

Drupal\node\EventSubscriber

class NodeTranslationMigrateSubscriber implements EventSubscriberInterface {

  /**
   * The key value factory.
   *
   * @var \Drupal\Core\KeyValueStore\KeyValueFactoryInterface
   */
  protected $keyValue;

  /**
   * The state service.
   *
   * @var \Drupal\Core\State\StateInterface
   */
  protected $state;

  /**
   * Constructs the NodeTranslationMigrateSubscriber.
   *
   * @param \Drupal\Core\KeyValueStore\KeyValueFactoryInterface $key_value
   *   The key value factory.
   * @param \Drupal\Core\State\StateInterface $state
   *   The state service.
   */
  public function __construct(KeyValueFactoryInterface $key_value, StateInterface $state) {
    $this->keyValue = $key_value;
    $this->state = $state;
  }

  /**
   * Helper method to check if we are migrating translated nodes.
   *
   * @param \Drupal\migrate\Event\EventBase $event
   *   The migrate event.
   *
   * @return bool
   *   True if we are migrating translated nodes, false otherwise.
   */
  protected function isNodeTranslationsMigration(EventBase $event) {
    $migration = $event
      ->getMigration();
    $source_configuration = $migration
      ->getSourceConfiguration();
    $destination_configuration = $migration
      ->getDestinationConfiguration();
    return !empty($source_configuration['translations']) && $destination_configuration['plugin'] === 'entity:node';
  }

  /**
   * Maps the old nid to the new one in the key value collection.
   *
   * @param \Drupal\migrate\Event\MigratePostRowSaveEvent $event
   *   The migrate post row save event.
   */
  public function onPostRowSave(MigratePostRowSaveEvent $event) {
    if ($this
      ->isNodeTranslationsMigration($event)) {
      $row = $event
        ->getRow();
      $source = $row
        ->getSource();
      $destination = $row
        ->getDestination();
      $collection = $this->keyValue
        ->get('node_translation_redirect');
      $collection
        ->set($source['nid'], [
        $destination['nid'],
        $destination['langcode'],
      ]);
    }
  }

  /**
   * Set the node_translation_redirect state to enable the redirections.
   *
   * @param \Drupal\migrate\Event\MigrateImportEvent $event
   *   The migrate import event.
   */
  public function onPostImport(MigrateImportEvent $event) {
    if ($this
      ->isNodeTranslationsMigration($event)) {
      $this->state
        ->set('node_translation_redirect', TRUE);
    }
  }

  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents() {
    $events = [];
    $events[MigrateEvents::POST_ROW_SAVE] = [
      'onPostRowSave',
    ];
    $events[MigrateEvents::POST_IMPORT] = [
      'onPostImport',
    ];
    return $events;
  }

}

Members

Name	Modifiers	Type	Description	Overrides
NodeTranslationMigrateSubscriber::$keyValue	protected	property	The key value factory.
NodeTranslationMigrateSubscriber::$state	protected	property	The state service.
NodeTranslationMigrateSubscriber::getSubscribedEvents	public static	function	Returns an array of event names this subscriber wants to listen to.
NodeTranslationMigrateSubscriber::isNodeTranslationsMigration	protected	function	Helper method to check if we are migrating translated nodes.
NodeTranslationMigrateSubscriber::onPostImport	public	function	Set the node_translation_redirect state to enable the redirections.
NodeTranslationMigrateSubscriber::onPostRowSave	public	function	Maps the old nid to the new one in the key value collection.
NodeTranslationMigrateSubscriber::__construct	public	function	Constructs the NodeTranslationMigrateSubscriber.