class EntityRepositoryTest

class EntityRepositoryTest extends KernelTestBase {
    use UserCreationTrait;
    
    /**
     * {@inheritdoc}
     */
    public static $modules = [
        'entity_test',
        'user',
        'language',
        'system',
    ];
    
    /**
     * The entity type manager.
     *
     * @var \Drupal\Core\Entity\EntityTypeManagerInterface
     */
    protected $entityTypeManager;
    
    /**
     * The entity repository.
     *
     * @var \Drupal\Core\Entity\EntityRepositoryInterface
     */
    protected $entityRepository;
    
    /**
     * {@inheritdoc}
     */
    public function setUp() {
        parent::setUp();
        $this->entityTypeManager = $this->container
            ->get('entity_type.manager');
        $this->entityRepository = $this->container
            ->get('entity.repository');
        $this->setUpCurrentUser();
        $this->installEntitySchema('entity_test');
        $this->installEntitySchema('entity_test_rev');
        $this->installEntitySchema('entity_test_mul');
        $this->installEntitySchema('entity_test_mulrev');
        $this->installConfig([
            'system',
            'language',
        ]);
        ConfigurableLanguage::createFromLangcode('it')->setWeight(1)
            ->save();
        ConfigurableLanguage::createFromLangcode('ro')->setWeight(2)
            ->save();
        $this->container
            ->get('state')
            ->set('entity_test.translation', TRUE);
        $this->container
            ->get('entity_type.bundle.info')
            ->clearCachedBundles();
    }
    
    /**
     * Tests retrieving active variants.
     *
     * @covers ::getActive
     * @covers ::getActiveMultiple
     */
    public function testGetActive() {
        $en_contexts = $this->getLanguageContexts('en');
        // Check that when the entity does not exist NULL is returned.
        $entity_type_id = 'entity_test';
        $active = $this->entityRepository
            ->getActive($entity_type_id, -1);
        $this->assertNull($active);
        // Check that the correct active variant is returned for a non-translatable,
        // non-revisionable entity.
        
        /** @var \Drupal\Core\Entity\ContentEntityStorageInterface $storage */
        $storage = $this->entityTypeManager
            ->getStorage($entity_type_id);
        $values = [
            'name' => $this->randomString(),
        ];
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
        $entity = $storage->create($values);
        $storage->save($entity);
        $entity = $storage->load($entity->id());
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $active */
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $en_contexts);
        $this->assertSame($entity, $active);
        // Check that the correct active variant is returned for a non-translatable
        // revisionable entity.
        $entity_type_id = 'entity_test_rev';
        $storage = $this->entityTypeManager
            ->getStorage($entity_type_id);
        $values = [
            'name' => $this->randomString(),
        ];
        $entity = $storage->create($values);
        $storage->save($entity);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $revision */
        $revision = $storage->createRevision($entity, FALSE);
        $revision->save();
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $en_contexts);
        $this->assertEntityType($active, $entity_type_id);
        $this->assertSame($revision->getLoadedRevisionId(), $active->getLoadedRevisionId());
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $revision2 */
        $revision2 = $storage->createRevision($revision);
        $revision2->save();
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $en_contexts);
        $this->assertSame($revision2->getLoadedRevisionId(), $active->getLoadedRevisionId());
        // Check that the correct active variant is returned for a translatable
        // non-revisionable entity.
        $entity_type_id = 'entity_test_mul';
        $storage = $this->entityTypeManager
            ->getStorage($entity_type_id);
        $values = [
            'name' => $this->randomString(),
        ];
        $entity = $storage->create($values);
        $storage->save($entity);
        $langcode = 'it';
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $translation */
        $translation = $entity->addTranslation($langcode, $values);
        $storage->save($translation);
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $en_contexts);
        $this->assertEntityType($active, $entity_type_id);
        $this->assertSame($entity->language()
            ->getId(), $active->language()
            ->getId());
        $it_contexts = $this->getLanguageContexts($langcode);
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $it_contexts);
        $this->assertSame($translation->language()
            ->getId(), $active->language()
            ->getId());
        // Check that the correct active variant is returned for a translatable and
        // revisionable entity.
        $entity_type_id = 'entity_test_mulrev';
        $storage = $this->entityTypeManager
            ->getStorage($entity_type_id);
        $values = [
            'name' => $this->randomString(),
        ];
        $entity = $storage->create($values);
        $storage->save($entity);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $en_revision */
        $en_revision = $storage->createRevision($entity, FALSE);
        $storage->save($en_revision);
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $en_contexts);
        $this->assertEntityType($active, $entity_type_id);
        $this->assertSame($en_revision->getLoadedRevisionId(), $active->getLoadedRevisionId());
        $revision_translation = $en_revision->addTranslation($langcode, $values);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $it_revision */
        $it_revision = $storage->createRevision($revision_translation, FALSE);
        $storage->save($it_revision);
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $en_contexts);
        $this->assertSame($en_revision->getLoadedRevisionId(), $active->getLoadedRevisionId());
        $this->assertSame($en_revision->language()
            ->getId(), $active->language()
            ->getId());
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $it_contexts);
        $this->assertSame($it_revision->getLoadedRevisionId(), $active->getLoadedRevisionId());
        $this->assertSame($it_revision->language()
            ->getId(), $active->language()
            ->getId());
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $en_revision2 */
        $en_revision2 = $storage->createRevision($en_revision);
        $storage->save($en_revision2);
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $en_contexts);
        $this->assertSame($en_revision2->getLoadedRevisionId(), $active->getLoadedRevisionId());
        $this->assertSame($en_revision2->language()
            ->getId(), $active->language()
            ->getId());
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $it_contexts);
        $this->assertSame($it_revision->getLoadedRevisionId(), $active->getLoadedRevisionId());
        $this->assertSame($it_revision->language()
            ->getId(), $active->language()
            ->getId());
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $it_revision2 */
        $it_revision2 = $storage->createRevision($it_revision);
        $storage->save($it_revision2);
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $en_contexts);
        $this->assertSame($it_revision2->getLoadedRevisionId(), $active->getLoadedRevisionId());
        $this->assertSame($it_revision2->getUntranslated()
            ->language()
            ->getId(), $active->language()
            ->getId());
        $active = $this->entityRepository
            ->getActive($entity_type_id, $entity->id(), $it_contexts);
        $this->assertSame($it_revision2->getLoadedRevisionId(), $active->getLoadedRevisionId());
        $this->assertSame($it_revision2->language()
            ->getId(), $active->language()
            ->getId());
        
        /** @var \Drupal\entity_test\Entity\EntityTestMulRev $entity2 */
        $entity2 = $storage->create($values);
        $storage->save($entity2);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface[] $active */
        $active = $this->entityRepository
            ->getActiveMultiple($entity_type_id, [
            $entity->id(),
            $entity2->id(),
        ], $it_contexts);
        $this->assertSame($it_revision2->getLoadedRevisionId(), $active[$entity->id()]
            ->getLoadedRevisionId());
        $this->assertSame($it_revision2->language()
            ->getId(), $active[$entity->id()]
            ->language()
            ->getId());
        $this->assertSame($entity2->getLoadedRevisionId(), $active[$entity2->id()]
            ->getLoadedRevisionId());
        $this->assertSame($entity2->language()
            ->getId(), $active[$entity2->id()]
            ->language()
            ->getId());
        $this->doTestLanguageFallback('getActive');
    }
    
    /**
     * Tests retrieving canonical variants.
     *
     * @covers ::getCanonical
     * @covers ::getCanonicalMultiple
     */
    public function testGetCanonical() {
        // Check that when the entity does not exist NULL is returned.
        $entity_type_id = 'entity_test_mul';
        $canonical = $this->entityRepository
            ->getActive($entity_type_id, -1);
        $this->assertNull($canonical);
        // Check that the correct language fallback rules are applied.
        $storage = $this->entityTypeManager
            ->getStorage($entity_type_id);
        $values = [
            'name' => $this->randomString(),
        ];
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
        $entity = $storage->create($values);
        $storage->save($entity);
        $langcode = 'it';
        $it_contexts = $this->getLanguageContexts($langcode);
        $canonical = $this->entityRepository
            ->getCanonical($entity_type_id, $entity->id(), $it_contexts);
        $this->assertSame($entity->getUntranslated()
            ->language()
            ->getId(), $canonical->language()
            ->getId());
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $translation */
        $translation = $entity->addTranslation($langcode, $values);
        $storage->save($translation);
        $canonical = $this->entityRepository
            ->getCanonical($entity_type_id, $entity->id(), $it_contexts);
        $this->assertSame($translation->language()
            ->getId(), $canonical->language()
            ->getId());
        $canonical = $this->entityRepository
            ->getCanonical($entity_type_id, $entity->id());
        $this->assertSame($entity->getUntranslated()
            ->language()
            ->getId(), $canonical->language()
            ->getId());
        
        /** @var \Drupal\entity_test\Entity\EntityTestMul $entity2 */
        $entity2 = $storage->create($values);
        $storage->save($entity2);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface[] $canonical */
        $canonical = $this->entityRepository
            ->getCanonicalMultiple($entity_type_id, [
            $entity->id(),
            $entity2->id(),
        ], $it_contexts);
        $this->assertSame($translation->language()
            ->getId(), $canonical[$entity->id()]
            ->language()
            ->getId());
        $this->assertSame($entity2->language()
            ->getId(), $canonical[$entity2->id()]
            ->language()
            ->getId());
        $this->doTestLanguageFallback('getCanonical');
    }
    
    /**
     * Check that language fallback is applied.
     *
     * @param string $method_name
     *   An entity repository method name.
     */
    protected function doTestLanguageFallback($method_name) {
        $entity_type_id = 'entity_test_mulrev';
        $en_contexts = $this->getLanguageContexts('en');
        $it_contexts = $this->getLanguageContexts('it');
        $ro_contexts = $this->getLanguageContexts('ro');
        
        /** @var \Drupal\Core\Entity\ContentEntityStorageInterface $storage */
        $storage = $this->entityTypeManager
            ->getStorage($entity_type_id);
        $values = [
            'name' => $this->randomString(),
        ];
        
        /** @var \Drupal\entity_test\Entity\EntityTestMulRev $entity3 */
        $entity3 = $storage->create([
            'langcode' => 'it',
        ] + $values);
        $entity3->addTranslation('ro', $values);
        $storage->save($entity3);
        
        /** @var \Drupal\entity_test\Entity\EntityTestMulRev $active */
        $active = $this->entityRepository
            ->{$method_name}($entity_type_id, $entity3->id(), $en_contexts);
        $this->assertSame('it', $active->language()
            ->getId());
        $active = $this->entityRepository
            ->{$method_name}($entity_type_id, $entity3->id(), $ro_contexts);
        $this->assertSame('ro', $active->language()
            ->getId());
        
        /** @var \Drupal\entity_test\Entity\EntityTestMulRev $entity4 */
        $entity4 = $storage->create([
            'langcode' => 'ro',
        ] + $values);
        $entity4->addTranslation('en', $values);
        $storage->save($entity4);
        $active = $this->entityRepository
            ->{$method_name}($entity_type_id, $entity4->id(), $it_contexts);
        $this->assertSame('en', $active->language()
            ->getId());
        
        /** @var \Drupal\entity_test\Entity\EntityTestMulRev $entity5 */
        $entity5 = $storage->create([
            'langcode' => 'ro',
        ] + $values);
        $storage->save($entity5);
        $active = $this->entityRepository
            ->{$method_name}($entity_type_id, $entity5->id(), $it_contexts);
        $this->assertSame('ro', $active->language()
            ->getId());
        $active = $this->entityRepository
            ->{$method_name}($entity_type_id, $entity5->id(), $en_contexts);
        $this->assertSame('ro', $active->language()
            ->getId());
    }
    
    /**
     * Asserts that the entity has the expected entity type ID
     *
     * @param object|null $entity
     *   An entity object or NULL.
     * @param string $expected_entity_type_id
     *   The expected entity type ID.
     */
    protected function assertEntityType($entity, $expected_entity_type_id) {
        $this->assertInstanceOf(EntityTest::class, $entity);
        $this->assertEquals($expected_entity_type_id, $entity->getEntityTypeId());
    }
    
    /**
     * Returns a set of language contexts matching the specified language.
     *
     * @param string $langcode
     *   A language code.
     *
     * @return \Drupal\Core\Plugin\Context\ContextInterface[]
     *   An array of contexts.
     */
    protected function getLanguageContexts($langcode) {
        $prefix = '@language.current_language_context:';
        return [
            $prefix . LanguageInterface::TYPE_INTERFACE => new Context(new ContextDefinition('language'), $langcode),
            $prefix . LanguageInterface::TYPE_CONTENT => new Context(new ContextDefinition('language'), $langcode),
        ];
    }

}