class ContentTranslationSyncImageTest

class ContentTranslationSyncImageTest extends ContentTranslationTestBase {
    use TestFileCreationTrait {
        getTestFiles as drupalGetTestFiles;
    }
    
    /**
     * {@inheritdoc}
     */
    protected $defaultTheme = 'stark';
    
    /**
     * The cardinality of the image field.
     *
     * @var int
     */
    protected $cardinality;
    
    /**
     * The test image files.
     *
     * @var array
     */
    protected $files;
    
    /**
     * {@inheritdoc}
     */
    protected static $modules = [
        'language',
        'content_translation',
        'entity_test',
        'image',
        'field_ui',
    ];
    
    /**
     * {@inheritdoc}
     */
    protected function setUp() : void {
        parent::setUp();
        $this->doSetup();
        $this->files = $this->drupalGetTestFiles('image');
    }
    
    /**
     * Creates the test image field.
     */
    protected function setupTestFields() : void {
        $this->fieldName = 'field_test_et_ui_image';
        $this->cardinality = 3;
        FieldStorageConfig::create([
            'field_name' => $this->fieldName,
            'entity_type' => $this->entityTypeId,
            'type' => 'image',
            'cardinality' => $this->cardinality,
        ])
            ->save();
        FieldConfig::create([
            'entity_type' => $this->entityTypeId,
            'field_name' => $this->fieldName,
            'bundle' => $this->entityTypeId,
            'label' => 'Test translatable image field',
            'third_party_settings' => [
                'content_translation' => [
                    'translation_sync' => [
                        'file' => FALSE,
                        'alt' => 'alt',
                        'title' => 'title',
                    ],
                ],
            ],
        ])
            ->save();
    }
    
    /**
     * {@inheritdoc}
     */
    protected function getEditorPermissions() : array {
        // Every entity-type-specific test needs to define these.
        return [
            'administer entity_test_mul fields',
            'administer languages',
            'administer content translation',
        ];
    }
    
    /**
     * Tests image field synchronization.
     */
    public function testImageFieldSync() : void {
        // Check that the alt and title fields are enabled for the image field.
        $this->drupalLogin($this->editor);
        $this->drupalGet('entity_test_mul/structure/' . $this->entityTypeId . '/fields/' . $this->entityTypeId . '.' . $this->entityTypeId . '.' . $this->fieldName);
        $this->assertSession()
            ->checkboxChecked('edit-third-party-settings-content-translation-translation-sync-alt');
        $this->assertSession()
            ->checkboxChecked('edit-third-party-settings-content-translation-translation-sync-title');
        $edit = [
            'third_party_settings[content_translation][translation_sync][alt]' => FALSE,
            'third_party_settings[content_translation][translation_sync][title]' => FALSE,
        ];
        $this->submitForm($edit, 'Save settings');
        // Check that the content translation settings page reflects the changes
        // performed in the field edit page.
        $this->drupalGet('admin/config/regional/content-language');
        $this->assertSession()
            ->checkboxNotChecked('edit-settings-entity-test-mul-entity-test-mul-columns-field-test-et-ui-image-alt');
        $this->assertSession()
            ->checkboxNotChecked('edit-settings-entity-test-mul-entity-test-mul-columns-field-test-et-ui-image-title');
        $edit = [
            'settings[entity_test_mul][entity_test_mul][fields][field_test_et_ui_image]' => TRUE,
            'settings[entity_test_mul][entity_test_mul][columns][field_test_et_ui_image][alt]' => TRUE,
            'settings[entity_test_mul][entity_test_mul][columns][field_test_et_ui_image][title]' => TRUE,
        ];
        $this->drupalGet('admin/config/regional/content-language');
        $this->submitForm($edit, 'Save configuration');
        $this->assertSession()
            ->statusMessageNotExists('error');
        $this->assertSession()
            ->checkboxChecked('edit-settings-entity-test-mul-entity-test-mul-columns-field-test-et-ui-image-alt');
        $this->assertSession()
            ->checkboxChecked('edit-settings-entity-test-mul-entity-test-mul-columns-field-test-et-ui-image-title');
        $this->drupalLogin($this->translator);
        $default_langcode = $this->langcodes[0];
        $langcode = $this->langcodes[1];
        // Populate the test entity with some random initial values.
        $values = [
            'name' => $this->randomMachineName(),
            'user_id' => 2,
            'langcode' => $default_langcode,
        ];
        $entity = \Drupal::entityTypeManager()->getStorage($this->entityTypeId)
            ->create($values);
        // Create some file entities from the generated test files and store them.
        $values = [];
        for ($delta = 0; $delta < $this->cardinality; $delta++) {
            // For the default language use the same order for files and field items.
            $index = $delta;
            // Create the file entity for the image being processed and record its
            // identifier.
            $field_values = [
                'uri' => $this->files[$index]->uri,
                'uid' => \Drupal::currentUser()->id(),
            ];
            $file = File::create($field_values);
            $file->setPermanent();
            $file->save();
            $fid = $file->id();
            $this->files[$index]->fid = $fid;
            // Generate the item for the current image file entity and attach it to
            // the entity.
            $item = [
                'target_id' => $fid,
                'alt' => $default_langcode . '_' . $fid . '_' . $this->randomMachineName(),
                'title' => $default_langcode . '_' . $fid . '_' . $this->randomMachineName(),
            ];
            $entity->{$this->fieldName}[] = $item;
            // Store the generated values keying them by fid for easier lookup.
            $values[$default_langcode][$fid] = $item;
        }
        $entity = $this->saveEntity($entity);
        // Create some field translations for the test image field. The translated
        // items will be one less than the original values to check that only the
        // translated ones will be preserved. In fact we want the same fids and
        // items order for both languages.
        $translation = $entity->addTranslation($langcode);
        for ($delta = 0; $delta < $this->cardinality - 1; $delta++) {
            // Simulate a field reordering: items are shifted of one position ahead.
            // The modulo operator ensures we start from the beginning after reaching
            // the maximum allowed delta.
            $index = ($delta + 1) % $this->cardinality;
            // Generate the item for the current image file entity and attach it to
            // the entity.
            $fid = $this->files[$index]->fid;
            $item = [
                'target_id' => $fid,
                'alt' => $langcode . '_' . $fid . '_' . $this->randomMachineName(),
                'title' => $langcode . '_' . $fid . '_' . $this->randomMachineName(),
            ];
            $translation->{$this->fieldName}[] = $item;
            // Again store the generated values keying them by fid for easier lookup.
            $values[$langcode][$fid] = $item;
        }
        // Perform synchronization: the translation language is used as source,
        // while the default language is used as target.
        $this->manager
            ->getTranslationMetadata($translation)
            ->setSource($default_langcode);
        $entity = $this->saveEntity($translation);
        $translation = $entity->getTranslation($langcode);
        // Check that one value has been dropped from the original values.
        $assert = count($entity->{$this->fieldName}) == 2;
        $this->assertTrue($assert, 'One item correctly removed from the synchronized field values.');
        // Check that fids have been synchronized and translatable column values
        // have been retained.
        $fids = [];
        foreach ($entity->{$this->fieldName} as $delta => $item) {
            $value = $values[$default_langcode][$item->target_id];
            $source_item = $translation->{$this->fieldName}
                ->get($delta);
            $assert = $item->target_id == $source_item->target_id && $item->alt == $value['alt'] && $item->title == $value['title'];
            $this->assertTrue($assert, "Field item {$item->target_id} has been successfully synchronized.");
            $fids[$item->target_id] = TRUE;
        }
        // Check that the dropped value is the right one.
        $removed_fid = $this->files[0]->fid;
        $this->assertTrue(!isset($fids[$removed_fid]), "Field item {$removed_fid} has been correctly removed.");
        // Add back an item for the dropped value and perform synchronization again.
        $values[$langcode][$removed_fid] = [
            'target_id' => $removed_fid,
            'alt' => $langcode . '_' . $removed_fid . '_' . $this->randomMachineName(),
            'title' => $langcode . '_' . $removed_fid . '_' . $this->randomMachineName(),
        ];
        $translation->{$this->fieldName}
            ->setValue(array_values($values[$langcode]));
        $entity = $this->saveEntity($translation);
        $translation = $entity->getTranslation($langcode);
        // Check that the value has been added to the default language.
        $assert = count($entity->{$this->fieldName}
            ->getValue()) == 3;
        $this->assertTrue($assert, 'One item correctly added to the synchronized field values.');
        foreach ($entity->{$this->fieldName} as $delta => $item) {
            // When adding an item its value is copied over all the target languages,
            // thus in this case the source language needs to be used to check the
            // values instead of the target one.
            $fid_langcode = $item->target_id != $removed_fid ? $default_langcode : $langcode;
            $value = $values[$fid_langcode][$item->target_id];
            $source_item = $translation->{$this->fieldName}
                ->get($delta);
            $assert = $item->target_id == $source_item->target_id && $item->alt == $value['alt'] && $item->title == $value['title'];
            $this->assertTrue($assert, "Field item {$item->target_id} has been successfully synchronized.");
        }
    }
    
    /**
     * Saves the passed entity and reloads it, enabling compatibility mode.
     *
     * @param \Drupal\Core\Entity\EntityInterface $entity
     *   The entity to be saved.
     *
     * @return \Drupal\Core\Entity\EntityInterface
     *   The saved entity.
     */
    protected function saveEntity(EntityInterface $entity) : EntityInterface {
        $entity->save();
        $entity = \Drupal::entityTypeManager()->getStorage('entity_test_mul')
            ->loadUnchanged($entity->id());
        return $entity;
    }

}