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<?php
namespace Drupal\Core\Entity;
use Drupal\Core\Config\Entity\ConfigEntityTypeInterface;
use Drupal\Core\Language\LanguageInterface;
use Drupal\Core\Language\LanguageManagerInterface;
use Drupal\Core\TypedData\TranslatableInterface;
/**
* Provides several mechanisms for retrieving entities.
*/
class EntityRepository implements EntityRepositoryInterface {
/**
* The entity type manager.
*
* @var \Drupal\Core\Entity\EntityTypeManagerInterface
*/
protected $entityTypeManager;
/**
* The language manager.
*
* @var \Drupal\Core\Language\LanguageManagerInterface
*/
protected $languageManager;
/**
* Constructs a new EntityRepository.
*
* @param \Drupal\Core\Entity\EntityTypeManagerInterface $entity_type_manager
* The entity type manager.
* @param \Drupal\Core\Language\LanguageManagerInterface $language_manager
* The language manager.
*/
public function __construct(EntityTypeManagerInterface $entity_type_manager, LanguageManagerInterface $language_manager) {
$this->entityTypeManager = $entity_type_manager;
$this->languageManager = $language_manager;
}
/**
* {@inheritdoc}
*/
public function loadEntityByUuid($entity_type_id, $uuid) {
$entity_type = $this->entityTypeManager->getDefinition($entity_type_id);
if (!$uuid_key = $entity_type->getKey('uuid')) {
throw new EntityStorageException("Entity type $entity_type_id does not support UUIDs.");
}
$entities = $this->entityTypeManager->getStorage($entity_type_id)->loadByProperties([$uuid_key => $uuid]);
return ($entities) ? reset($entities) : NULL;
}
/**
* {@inheritdoc}
*/
public function loadEntityByConfigTarget($entity_type_id, $target) {
$entity_type = $this->entityTypeManager->getDefinition($entity_type_id);
// For configuration entities, the config target is given by the entity ID.
// @todo Consider adding a method to allow entity types to indicate the
// target identifier key rather than hard-coding this check. Issue:
// https://www.drupal.org/node/2412983.
if ($entity_type instanceof ConfigEntityTypeInterface) {
$entity = $this->entityTypeManager->getStorage($entity_type_id)->load($target);
}
// For content entities, the config target is given by the UUID.
else {
$entity = $this->loadEntityByUuid($entity_type_id, $target);
}
return $entity;
}
/**
* {@inheritdoc}
*/
public function getTranslationFromContext(EntityInterface $entity, $langcode = NULL, $context = []) {
$translation = $entity;
if ($entity instanceof TranslatableInterface && count($entity->getTranslationLanguages()) > 1) {
if (empty($langcode)) {
$langcode = $this->languageManager->getCurrentLanguage(LanguageInterface::TYPE_CONTENT)->getId();
$entity->addCacheContexts(['languages:' . LanguageInterface::TYPE_CONTENT]);
}
// Retrieve language fallback candidates to perform the entity language
// negotiation, unless the current translation is already the desired one.
if ($entity->language()->getId() != $langcode) {
$context['data'] = $entity;
$context += ['operation' => 'entity_view', 'langcode' => $langcode];
$candidates = $this->languageManager->getFallbackCandidates($context);
// Ensure the default language has the proper language code.
$default_language = $entity->getUntranslated()->language();
$candidates[$default_language->getId()] = LanguageInterface::LANGCODE_DEFAULT;
// Return the most fitting entity translation.
foreach ($candidates as $candidate) {
if ($entity->hasTranslation($candidate)) {
$translation = $entity->getTranslation($candidate);
break;
}
}
}
}
return $translation;
}
}