class ContentTranslationFieldSyncRevisionTest

class ContentTranslationFieldSyncRevisionTest extends EntityKernelTestBase {
    use TestFileCreationTrait;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'file',
        'image',
        'language',
        'content_translation',
        'content_translation_test',
    ];
    
    /**
     * The synchronized field name.
     *
     * @var string
     */
    protected $fieldName = 'sync_field';
    
    /**
     * The content translation manager.
     *
     * @var \Drupal\content_translation\ContentTranslationManagerInterface|\Drupal\content_translation\BundleTranslationSettingsInterface
     */
    protected $contentTranslationManager;
    
    /**
     * The test entity storage.
     *
     * @var \Drupal\Core\Entity\ContentEntityStorageInterface
     */
    protected $storage;
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $entity_type_id = 'entity_test_mulrev';
        $this->installEntitySchema($entity_type_id);
        $this->installEntitySchema('file');
        $this->installSchema('file', [
            'file_usage',
        ]);
        ConfigurableLanguage::createFromLangcode('it')->save();
        ConfigurableLanguage::createFromLangcode('fr')->save();
        
        /** @var \Drupal\field\Entity\FieldStorageConfig $field_storage */
        $field_storage_config = FieldStorageConfig::create([
            'field_name' => $this->fieldName,
            'type' => 'image',
            'entity_type' => $entity_type_id,
            'cardinality' => 1,
            'translatable' => 1,
        ]);
        $field_storage_config->save();
        $field_config = FieldConfig::create([
            'entity_type' => $entity_type_id,
            'field_name' => $this->fieldName,
            'bundle' => $entity_type_id,
            'label' => 'Synchronized field',
            'translatable' => 1,
        ]);
        $field_config->save();
        $property_settings = [
            'alt' => 'alt',
            'title' => 'title',
            'file' => 0,
        ];
        $field_config->setThirdPartySetting('content_translation', 'translation_sync', $property_settings);
        $field_config->save();
        $this->contentTranslationManager = $this->container
            ->get('content_translation.manager');
        $this->contentTranslationManager
            ->setEnabled($entity_type_id, $entity_type_id, TRUE);
        $this->storage = $this->entityTypeManager
            ->getStorage($entity_type_id);
        foreach ($this->getTestFiles('image') as $file) {
            $entity = File::create((array) $file + [
                'status' => 1,
            ]);
            $entity->save();
        }
        $this->state
            ->set('content_translation.entity_access.file', [
            'view' => TRUE,
        ]);
        $account = User::create([
            'name' => $this->randomMachineName(),
            'status' => 1,
        ]);
        $account->save();
    }
    
    /**
     * Checks that field synchronization works as expected with revisions.
     *
     * @covers \Drupal\content_translation\Plugin\Validation\Constraint\ContentTranslationSynchronizedFieldsConstraintValidator::create
     * @covers \Drupal\content_translation\Plugin\Validation\Constraint\ContentTranslationSynchronizedFieldsConstraintValidator::validate
     * @covers \Drupal\content_translation\Plugin\Validation\Constraint\ContentTranslationSynchronizedFieldsConstraintValidator::hasSynchronizedPropertyChanges
     * @covers \Drupal\content_translation\FieldTranslationSynchronizer::getFieldSynchronizedProperties
     * @covers \Drupal\content_translation\FieldTranslationSynchronizer::synchronizeFields
     * @covers \Drupal\content_translation\FieldTranslationSynchronizer::synchronizeItems
     */
    public function testFieldSynchronizationAndValidation() {
        // Test that when untranslatable field widgets are displayed, synchronized
        // field properties can be changed only in default revisions.
        $this->setUntranslatableFieldWidgetsDisplay(TRUE);
        $entity = $this->saveNewEntity();
        $entity_id = $entity->id();
        $this->assertLatestRevisionFieldValues($entity_id, [
            1,
            1,
            1,
            'Alt 1 EN',
        ]);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $en_revision */
        $en_revision = $this->createRevision($entity, FALSE);
        $en_revision->get($this->fieldName)->target_id = 2;
        $violations = $en_revision->validate();
        $this->assertViolations($violations);
        $it_translation = $entity->addTranslation('it', $entity->toArray());
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $it_revision */
        $it_revision = $this->createRevision($it_translation, FALSE);
        $metadata = $this->contentTranslationManager
            ->getTranslationMetadata($it_revision);
        $metadata->setSource('en');
        $it_revision->get($this->fieldName)->target_id = 2;
        $it_revision->get($this->fieldName)->alt = 'Alt 2 IT';
        $violations = $it_revision->validate();
        $this->assertViolations($violations);
        $it_revision->isDefaultRevision(TRUE);
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            2,
            2,
            2,
            'Alt 1 EN',
            'Alt 2 IT',
        ]);
        $en_revision = $this->createRevision($en_revision, FALSE);
        $en_revision->get($this->fieldName)->alt = 'Alt 3 EN';
        $violations = $en_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($en_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            3,
            2,
            2,
            'Alt 3 EN',
            'Alt 2 IT',
        ]);
        $it_revision = $this->createRevision($it_revision, FALSE);
        $it_revision->get($this->fieldName)->alt = 'Alt 4 IT';
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            4,
            2,
            2,
            'Alt 1 EN',
            'Alt 4 IT',
        ]);
        $en_revision = $this->createRevision($en_revision);
        $en_revision->get($this->fieldName)->alt = 'Alt 5 EN';
        $violations = $en_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($en_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            5,
            2,
            2,
            'Alt 5 EN',
            'Alt 2 IT',
        ]);
        $en_revision = $this->createRevision($en_revision);
        $en_revision->get($this->fieldName)->target_id = 6;
        $en_revision->get($this->fieldName)->alt = 'Alt 6 EN';
        $violations = $en_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($en_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            6,
            6,
            6,
            'Alt 6 EN',
            'Alt 2 IT',
        ]);
        $it_revision = $this->createRevision($it_revision);
        $it_revision->get($this->fieldName)->alt = 'Alt 7 IT';
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            7,
            6,
            6,
            'Alt 6 EN',
            'Alt 7 IT',
        ]);
        // Test that when untranslatable field widgets are hidden, synchronized
        // field properties can be changed only when editing the default
        // translation. This may lead to temporarily desynchronized values, when
        // saving a pending revision for the default translation that changes a
        // synchronized property (see revision 11).
        $this->setUntranslatableFieldWidgetsDisplay(FALSE);
        $entity = $this->saveNewEntity();
        $entity_id = $entity->id();
        $this->assertLatestRevisionFieldValues($entity_id, [
            8,
            1,
            1,
            'Alt 1 EN',
        ]);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $en_revision */
        $en_revision = $this->createRevision($entity, FALSE);
        $en_revision->get($this->fieldName)->target_id = 2;
        $en_revision->get($this->fieldName)->alt = 'Alt 2 EN';
        $violations = $en_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($en_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            9,
            2,
            2,
            'Alt 2 EN',
        ]);
        $it_translation = $entity->addTranslation('it', $entity->toArray());
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $it_revision */
        $it_revision = $this->createRevision($it_translation, FALSE);
        $metadata = $this->contentTranslationManager
            ->getTranslationMetadata($it_revision);
        $metadata->setSource('en');
        $it_revision->get($this->fieldName)->target_id = 3;
        $violations = $it_revision->validate();
        $this->assertViolations($violations);
        $it_revision->isDefaultRevision(TRUE);
        $violations = $it_revision->validate();
        $this->assertViolations($violations);
        $it_revision = $this->createRevision($it_translation);
        $metadata = $this->contentTranslationManager
            ->getTranslationMetadata($it_revision);
        $metadata->setSource('en');
        $it_revision->get($this->fieldName)->alt = 'Alt 3 IT';
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            10,
            1,
            1,
            'Alt 1 EN',
            'Alt 3 IT',
        ]);
        $en_revision = $this->createRevision($en_revision, FALSE);
        $en_revision->get($this->fieldName)->alt = 'Alt 4 EN';
        $violations = $en_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($en_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            11,
            2,
            1,
            'Alt 4 EN',
            'Alt 3 IT',
        ]);
        $it_revision = $this->createRevision($it_revision, FALSE);
        $it_revision->get($this->fieldName)->alt = 'Alt 5 IT';
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            12,
            1,
            1,
            'Alt 1 EN',
            'Alt 5 IT',
        ]);
        $en_revision = $this->createRevision($en_revision);
        $en_revision->get($this->fieldName)->target_id = 6;
        $en_revision->get($this->fieldName)->alt = 'Alt 6 EN';
        $violations = $en_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($en_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            13,
            6,
            6,
            'Alt 6 EN',
            'Alt 3 IT',
        ]);
        $it_revision = $this->createRevision($it_revision);
        $it_revision->get($this->fieldName)->target_id = 7;
        $violations = $it_revision->validate();
        $this->assertViolations($violations);
        $it_revision = $this->createRevision($it_revision);
        $it_revision->get($this->fieldName)->alt = 'Alt 7 IT';
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            14,
            6,
            6,
            'Alt 6 EN',
            'Alt 7 IT',
        ]);
        // Test that creating a default revision starting from a pending revision
        // having changes to synchronized properties, without introducing new
        // changes works properly.
        $this->setUntranslatableFieldWidgetsDisplay(FALSE);
        $entity = $this->saveNewEntity();
        $entity_id = $entity->id();
        $this->assertLatestRevisionFieldValues($entity_id, [
            15,
            1,
            1,
            'Alt 1 EN',
        ]);
        $it_translation = $entity->addTranslation('it', $entity->toArray());
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $it_revision */
        $it_revision = $this->createRevision($it_translation);
        $metadata = $this->contentTranslationManager
            ->getTranslationMetadata($it_revision);
        $metadata->setSource('en');
        $it_revision->get($this->fieldName)->alt = 'Alt 2 IT';
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            16,
            1,
            1,
            'Alt 1 EN',
            'Alt 2 IT',
        ]);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $en_revision */
        $en_revision = $this->createRevision($entity);
        $en_revision->get($this->fieldName)->target_id = 3;
        $en_revision->get($this->fieldName)->alt = 'Alt 3 EN';
        $violations = $en_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($en_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            17,
            3,
            3,
            'Alt 3 EN',
            'Alt 2 IT',
        ]);
        $en_revision = $this->createRevision($entity, FALSE);
        $en_revision->get($this->fieldName)->target_id = 4;
        $en_revision->get($this->fieldName)->alt = 'Alt 4 EN';
        $violations = $en_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($en_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            18,
            4,
            3,
            'Alt 4 EN',
            'Alt 2 IT',
        ]);
        $en_revision = $this->createRevision($entity);
        $violations = $en_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($en_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            19,
            4,
            4,
            'Alt 4 EN',
            'Alt 2 IT',
        ]);
        $it_revision = $this->createRevision($it_revision);
        $it_revision->get($this->fieldName)->alt = 'Alt 6 IT';
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            20,
            4,
            4,
            'Alt 4 EN',
            'Alt 6 IT',
        ]);
        // Check that we are not allowed to perform changes to multiple translations
        // in pending revisions when synchronized properties are involved.
        $this->setUntranslatableFieldWidgetsDisplay(FALSE);
        $entity = $this->saveNewEntity();
        $entity_id = $entity->id();
        $this->assertLatestRevisionFieldValues($entity_id, [
            21,
            1,
            1,
            'Alt 1 EN',
        ]);
        $it_translation = $entity->addTranslation('it', $entity->toArray());
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $it_revision */
        $it_revision = $this->createRevision($it_translation);
        $metadata = $this->contentTranslationManager
            ->getTranslationMetadata($it_revision);
        $metadata->setSource('en');
        $it_revision->get($this->fieldName)->alt = 'Alt 2 IT';
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            22,
            1,
            1,
            'Alt 1 EN',
            'Alt 2 IT',
        ]);
        $en_revision = $this->createRevision($entity, FALSE);
        $en_revision->get($this->fieldName)->target_id = 2;
        $en_revision->getTranslation('it')
            ->get($this->fieldName)->alt = 'Alt 3 IT';
        $violations = $en_revision->validate();
        $this->assertViolations($violations);
        // Test that when saving a new default revision starting from a pending
        // revision, outdated synchronized properties do not override more recent
        // ones.
        $this->setUntranslatableFieldWidgetsDisplay(TRUE);
        $entity = $this->saveNewEntity();
        $entity_id = $entity->id();
        $this->assertLatestRevisionFieldValues($entity_id, [
            23,
            1,
            1,
            'Alt 1 EN',
        ]);
        $it_translation = $entity->addTranslation('it', $entity->toArray());
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $it_revision */
        $it_revision = $this->createRevision($it_translation, FALSE);
        $metadata = $this->contentTranslationManager
            ->getTranslationMetadata($it_revision);
        $metadata->setSource('en');
        $it_revision->get($this->fieldName)->alt = 'Alt 2 IT';
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            24,
            1,
            1,
            'Alt 1 EN',
            'Alt 2 IT',
        ]);
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $en_revision */
        $en_revision = $this->createRevision($entity);
        $en_revision->get($this->fieldName)->target_id = 3;
        $en_revision->get($this->fieldName)->alt = 'Alt 3 EN';
        $violations = $en_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($en_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            25,
            3,
            3,
            'Alt 3 EN',
            'Alt 2 IT',
        ]);
        $it_revision = $this->createRevision($it_revision);
        $it_revision->get($this->fieldName)->alt = 'Alt 4 IT';
        $violations = $it_revision->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($it_revision);
        $this->assertLatestRevisionFieldValues($entity_id, [
            26,
            3,
            3,
            'Alt 3 EN',
            'Alt 4 IT',
        ]);
    }
    
    /**
     * Tests changing the default language of an entity.
     */
    public function testChangeDefaultLanguageNonTranslatableFieldsHidden() {
        $this->setUntranslatableFieldWidgetsDisplay(FALSE);
        $entity = $this->saveNewEntity();
        $entity->langcode = 'it';
        $this->assertCount(0, $entity->validate());
    }
    
    /**
     * Sets untranslatable field widgets' display status.
     *
     * @param bool $display
     *   Whether untranslatable field widgets should be displayed.
     */
    protected function setUntranslatableFieldWidgetsDisplay($display) {
        $entity_type_id = $this->storage
            ->getEntityTypeId();
        $settings = [
            'untranslatable_fields_hide' => !$display,
        ];
        $this->contentTranslationManager
            ->setBundleTranslationSettings($entity_type_id, $entity_type_id, $settings);
        
        /** @var \Drupal\Core\Entity\EntityTypeBundleInfo $bundle_info */
        $bundle_info = $this->container
            ->get('entity_type.bundle.info');
        $bundle_info->clearCachedBundles();
    }
    
    /**
     * @return \Drupal\Core\Entity\ContentEntityInterface
     */
    protected function saveNewEntity() {
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
        $entity = EntityTestMulRev::create([
            'uid' => 1,
            'langcode' => 'en',
            $this->fieldName => [
                'target_id' => 1,
                'alt' => 'Alt 1 EN',
            ],
        ]);
        $metadata = $this->contentTranslationManager
            ->getTranslationMetadata($entity);
        $metadata->setSource(LanguageInterface::LANGCODE_NOT_SPECIFIED);
        $violations = $entity->validate();
        $this->assertEmpty($violations);
        $this->storage
            ->save($entity);
        return $entity;
    }
    
    /**
     * Creates a new revision starting from the latest translation-affecting one.
     *
     * @param \Drupal\Core\Entity\ContentEntityInterface $translation
     *   The translation to be revisioned.
     * @param bool $default
     *   (optional) Whether the new revision should be marked as default. Defaults
     *   to TRUE.
     *
     * @return \Drupal\Core\Entity\ContentEntityInterface
     *   An entity revision object.
     */
    protected function createRevision(ContentEntityInterface $translation, $default = TRUE) {
        if (!$translation->isNewTranslation()) {
            $langcode = $translation->language()
                ->getId();
            $revision_id = $this->storage
                ->getLatestTranslationAffectedRevisionId($translation->id(), $langcode);
            
            /** @var \Drupal\Core\Entity\ContentEntityInterface $revision */
            $revision = $this->storage
                ->loadRevision($revision_id);
            $translation = $revision->getTranslation($langcode);
        }
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $revision */
        $revision = $this->storage
            ->createRevision($translation, $default);
        return $revision;
    }
    
    /**
     * Asserts that the expected violations were found.
     *
     * @param \Drupal\Core\Entity\EntityConstraintViolationListInterface $violations
     *   A list of violations.
     *
     * @internal
     */
    protected function assertViolations(EntityConstraintViolationListInterface $violations) : void {
        $entity_type_id = $this->storage
            ->getEntityTypeId();
        $settings = $this->contentTranslationManager
            ->getBundleTranslationSettings($entity_type_id, $entity_type_id);
        $message = !empty($settings['untranslatable_fields_hide']) ? 'Non-translatable field elements can only be changed when updating the original language.' : 'Non-translatable field elements can only be changed when updating the current revision.';
        $list = [];
        foreach ($violations as $violation) {
            if ((string) $violation->getMessage() === $message) {
                $list[] = $violation;
            }
        }
        $this->assertCount(1, $list);
    }
    
    /**
     * Asserts that the latest revision has the expected field values.
     *
     * @param $entity_id
     *   The entity ID.
     * @param array $expected_values
     *   An array of expected values in the following order:
     *   - revision ID
     *   - target ID (en)
     *   - target ID (it)
     *   - alt (en)
     *   - alt (it)
     *
     * @internal
     */
    protected function assertLatestRevisionFieldValues(int $entity_id, array $expected_values) : void {
        
        /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
        $entity = $this->storage
            ->loadRevision($this->storage
            ->getLatestRevisionId($entity_id));
        @([
            $revision_id,
            $target_id_en,
            $target_id_it,
            $alt_en,
            $alt_it,
        ] = $expected_values);
        $this->assertEquals($revision_id, $entity->getRevisionId());
        $this->assertEquals($target_id_en, $entity->get($this->fieldName)->target_id);
        $this->assertEquals($alt_en, $entity->get($this->fieldName)->alt);
        if ($entity->hasTranslation('it')) {
            $it_translation = $entity->getTranslation('it');
            $this->assertEquals($target_id_it, $it_translation->get($this->fieldName)->target_id);
            $this->assertEquals($alt_it, $it_translation->get($this->fieldName)->alt);
        }
    }

}