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<?php
namespace Drupal\node\EventSubscriber;
use Drupal\Core\KeyValueStore\KeyValueFactoryInterface;
use Drupal\Core\State\StateInterface;
use Drupal\migrate\Event\EventBase;
use Drupal\migrate\Event\MigrateEvents;
use Drupal\migrate\Event\MigrateImportEvent;
use Drupal\migrate\Event\MigratePostRowSaveEvent;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;
/**
* Creates a key value collection for migrated node translation mappings.
*
* 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.
*
* @see \Drupal\node\NodeServiceProvider
* @see \Drupal\node\EventSubscriber\NodeTranslationExceptionSubscriber
*/
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 redirects.
*
* @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(): array {
$events = [];
$events[MigrateEvents::POST_ROW_SAVE] = ['onPostRowSave'];
$events[MigrateEvents::POST_IMPORT] = ['onPostImport'];
return $events;
}
}
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