EntityReferenceFieldSerializer.php in Acquia Content Hub 8.2

Namespace

Drupal\acquia_contenthub\EventSubscriber\SerializeContentField

File

src/EventSubscriber/SerializeContentField/EntityReferenceFieldSerializer.php

<?php

namespace Drupal\acquia_contenthub\EventSubscriber\SerializeContentField;

use Drupal\acquia_contenthub\AcquiaContentHubEvents;
use Drupal\acquia_contenthub\Event\SerializeCdfEntityFieldEvent;
use Symfony\Component\EventDispatcher\EventSubscriberInterface;

/**
 * Subscribes to entity field serialization to handle entity references.
 */
class EntityReferenceFieldSerializer implements EventSubscriberInterface {

  /**
   * Field types to use.
   *
   * @var array
   */
  protected $fieldTypes = [
    'file',
    'entity_reference',
    'entity_reference_revisions',
  ];

  /**
   * {@inheritdoc}
   */
  public static function getSubscribedEvents() {
    $events[AcquiaContentHubEvents::SERIALIZE_CONTENT_ENTITY_FIELD][] = [
      'onSerializeContentField',
      100,
    ];
    return $events;
  }

  /**
   * Extract entity uuids as field values.
   *
   * @param \Drupal\acquia_contenthub\Event\SerializeCdfEntityFieldEvent $event
   *   The content entity field serialization event.
   *
   * @throws \Exception
   */
  public function onSerializeContentField(SerializeCdfEntityFieldEvent $event) {
    if (!in_array($event
      ->getField()
      ->getFieldDefinition()
      ->getType(), $this->fieldTypes)) {
      return;
    }
    $cdf = $event
      ->getCdf();
    $metadata = $cdf
      ->getMetadata();
    $metadata['field'][$event
      ->getFieldName()] = [
      'type' => $event
        ->getField()
        ->getFieldDefinition()
        ->getType(),
      'target' => $event
        ->getField()
        ->getFieldDefinition()
        ->getFieldStorageDefinition()
        ->getSetting('target_type'),
    ];
    $cdf
      ->setMetadata($metadata);
    $data = [];

    /** @var \Drupal\Core\Entity\TranslatableInterface $entity */
    $entity = $event
      ->getEntity();
    foreach ($entity
      ->getTranslationLanguages() as $langcode => $language) {
      $field = $event
        ->getFieldTranslation($langcode);
      if ($field
        ->isEmpty()) {
        $data['value'][$langcode] = [];
        continue;
      }
      if ($event
        ->getFieldName() != $event
        ->getEntity()
        ->getEntityType()
        ->getKey('bundle')) {
        foreach ($field as $item) {
          if (!$item->entity) {
            $entity = \Drupal::entityTypeManager()
              ->getStorage($event
              ->getField()
              ->getFieldDefinition()
              ->getSetting('target_type'))
              ->load($item
              ->getValue()['target_id']);
            if (is_null($entity)) {
              continue;
            }
            $item->entity = $entity;
          }
          $data['value'][$langcode][] = $item->entity
            ->uuid();
        }
      }
      else {
        foreach ($field as $item) {
          $data['value'][$langcode] = $item->entity
            ->uuid();
        }
      }
    }
    $event
      ->setFieldData($data);
    $event
      ->stopPropagation();
  }

}

Classes

Name	Description
EntityReferenceFieldSerializer	Subscribes to entity field serialization to handle entity references.