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<?php
namespace Drupal\serialization\EntityResolver;
use Drupal\Core\Entity\EntityRepositoryInterface;
use Symfony\Component\Serializer\Normalizer\NormalizerInterface;
/**
* Resolves entities from data that contains an entity UUID.
*/
class UuidResolver implements EntityResolverInterface {
/**
* The entity repository.
*
* @var \Drupal\Core\Entity\EntityRepositoryInterface
*/
protected $entityRepository;
/**
* Constructs a UuidResolver object.
*
* @param \Drupal\Core\Entity\EntityRepositoryInterface $entity_repository
* The entity repository.
*/
public function __construct(EntityRepositoryInterface $entity_repository) {
$this->entityRepository = $entity_repository;
}
/**
* {@inheritdoc}
*/
public function resolve(NormalizerInterface $normalizer, $data, $entity_type) {
// The normalizer is what knows the specification of the data being
// deserialized. If it can return a UUID from that data, and if there's an
// entity with that UUID, then return its ID.
if (($normalizer instanceof UuidReferenceInterface) && ($uuid = $normalizer->getUuid($data))) {
if ($entity = $this->entityRepository->loadEntityByUuid($entity_type, $uuid)) {
return $entity->id();
}
}
return NULL;
}
}
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