class ContentEntitySource

ContentEntitySourcePluginUi.php in sources/content/src/ContentEntitySourcePluginUi.php

ContentTranslationPreviewController.php in sources/content/src/Controller/ContentTranslationPreviewController.php

tmgmt_content.module in sources/content/tmgmt_content.module

Source plugin for the Translation Management system that handles entities.

class ContentEntitySource extends SourcePluginBase implements SourcePreviewInterface, ContinuousSourceInterface {

  /**
   * Returns the entity for the given job item.
   *
   * @param \Drupal\tmgmt\JobItemInterface $job_item
   *   The job entity
   *
   * @return \Drupal\Core\Entity\ContentEntityInterface
   *   The entity.
   */
  protected function getEntity(JobItemInterface $job_item) {
    return \Drupal::entityTypeManager()
      ->getStorage($job_item
      ->getItemType())
      ->load($job_item
      ->getItemId());
  }

  /**
   * Loads a list of entities for the given entity type ID.
   *
   * By providing the language code, the latest revisions affecting the
   * specified translation (language code) will be returned.
   *
   * @param string $entity_type_id
   *   The entity type ID.
   * @param array $entity_ids
   *   A list of entity IDs to load.
   * @param string|null $langcode
   *   (optional) The language code. Defaults to source entity language.
   *
   * @return \Drupal\Core\Entity\EntityInterface[]
   *   Returns a list of entities.
   *
   * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
   * @throws \Drupal\Component\Plugin\Exception\PluginNotFoundException
   */
  public static function loadMultiple($entity_type_id, array $entity_ids, $langcode = NULL) {

    /** @var \Drupal\Core\Entity\EntityStorageInterface $storage */
    $storage = \Drupal::entityTypeManager()
      ->getStorage($entity_type_id);
    $entities = $storage
      ->loadMultiple($entity_ids);

    // Load the latest revision if the entity type is revisionable.
    if ($storage
      ->getEntityType()
      ->isRevisionable() && $storage instanceof TranslatableRevisionableStorageInterface) {
      foreach ($entities as $entity_id => $entity) {

        // Use the specified langcode or fallback to the default language.
        $translation_langcode = $langcode ?: $entity
          ->language()
          ->getId();
        $revision_id = $storage
          ->getLatestTranslationAffectedRevisionId($entity
          ->id(), $translation_langcode);

        // Get the pending revisions. If the returned revision ID is the same as
        // the default one, there is no need for further checks.
        if ($revision_id && $entity
          ->getRevisionId() != $revision_id) {
          $revision = $storage
            ->loadRevision($revision_id);

          // If the affected revision was the default one at some point, then it
          // is an old revision that should be part of the already loaded
          // default so we do not need to replace it here.
          if (!$revision
            ->wasDefaultRevision()) {
            $entities[$entity_id] = $revision;
          }
        }
      }
    }
    return $entities;
  }

  /**
   * Loads a single entity for the given entity type ID.
   *
   * By providing the language code, the latest revisions affecting the
   * specified translation (language code) will be returned.
   *
   * @param string $entity_type_id
   *   The entity type ID.
   * @param string $id
   *   The entity ID.
   * @param string|null $langcode
   *   (optional) The language code. Defaults to source entity language.
   *
   * @return \Drupal\Core\Entity\ContentEntityInterface|null
   *   The loaded entity or null if not found.
   *
   * @throws \Drupal\Component\Plugin\Exception\InvalidPluginDefinitionException
   * @throws \Drupal\Component\Plugin\Exception\PluginNotFoundException
   */
  public static function load($entity_type_id, $id, $langcode = NULL) {
    $entities = static::loadMultiple($entity_type_id, [
      $id,
    ], $langcode);
    return isset($entities[$id]) ? $entities[$id] : NULL;
  }

  /**
   * {@inheritdoc}
   */
  public function getLabel(JobItemInterface $job_item) {

    // Use the source language to a get label for the job item.
    $langcode = $job_item
      ->getJob() ? $job_item
      ->getJob()
      ->getSourceLangcode() : NULL;
    $label = FALSE;
    if ($entity = static::load($job_item
      ->getItemType(), $job_item
      ->getItemId(), $langcode)) {
      $label = $entity
        ->label() ?: $entity
        ->id();
    }
    return is_bool($label) ? $label : (string) $label;
  }

  /**
   * {@inheritdoc}
   */
  public function getUrl(JobItemInterface $job_item) {

    /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
    $langcode = $job_item
      ->getJob() ? $job_item
      ->getJob()
      ->getSourceLangcode() : NULL;
    if ($entity = static::load($job_item
      ->getItemType(), $job_item
      ->getItemId(), $langcode)) {
      if ($entity
        ->hasLinkTemplate('canonical')) {
        $anonymous = new AnonymousUserSession();
        $url = $entity
          ->toUrl();
        $anonymous_access = \Drupal::config('tmgmt.settings')
          ->get('anonymous_access');
        if ($url && $anonymous_access && !$entity
          ->access('view', $anonymous)) {
          $url
            ->setOption('query', [
            'key' => \Drupal::service('tmgmt_content.key_access')
              ->getKey($job_item),
          ]);
        }
        return $url;
      }
    }
    return NULL;
  }

  /**
   * Implements TMGMTEntitySourcePluginController::getData().
   *
   * Returns the data from the fields as a structure that can be processed by
   * the Translation Management system.
   */
  public function getData(JobItemInterface $job_item) {
    $langcode = $job_item
      ->getJob() ? $job_item
      ->getJob()
      ->getSourceLangcode() : NULL;
    $entity = static::load($job_item
      ->getItemType(), $job_item
      ->getItemId(), $langcode);
    if (!$entity) {
      throw new TMGMTException(t('Unable to load entity %type with id %id', array(
        '%type' => $job_item
          ->getItemType(),
        '%id' => $job_item
          ->getItemId(),
      )));
    }
    $languages = \Drupal::languageManager()
      ->getLanguages();
    $id = $entity
      ->language()
      ->getId();
    if (!isset($languages[$id])) {
      throw new TMGMTException(t('Entity %entity could not be translated because the language %language is not applicable', array(
        '%entity' => $entity
          ->language()
          ->getId(),
        '%language' => $entity
          ->language()
          ->getName(),
      )));
    }
    if (!$entity
      ->hasTranslation($job_item
      ->getJob()
      ->getSourceLangcode())) {
      throw new TMGMTException(t('The %type entity %id with translation %lang does not exist.', array(
        '%type' => $entity
          ->getEntityTypeId(),
        '%id' => $entity
          ->id(),
        '%lang' => $job_item
          ->getJob()
          ->getSourceLangcode(),
      )));
    }
    $translation = $entity
      ->getTranslation($job_item
      ->getJob()
      ->getSourceLangcode());
    $data = $this
      ->extractTranslatableData($translation);
    $entity_form_display = \Drupal::service('entity_display.repository')
      ->getFormDisplay($job_item
      ->getItemType(), $entity
      ->bundle(), 'default');
    uksort($data, function ($a, $b) use ($entity_form_display) {
      $a_weight = NULL;
      $b_weight = NULL;

      // Get the weights.
      if ($entity_form_display
        ->getComponent($a) && (isset($entity_form_display
        ->getComponent($a)['weight']) && !is_null($entity_form_display
        ->getComponent($a)['weight']))) {
        $a_weight = (int) $entity_form_display
          ->getComponent($a)['weight'];
      }
      if ($entity_form_display
        ->getComponent($b) && (isset($entity_form_display
        ->getComponent($b)['weight']) && !is_null($entity_form_display
        ->getComponent($b)['weight']))) {
        $b_weight = (int) $entity_form_display
          ->getComponent($b)['weight'];
      }

      // If neither field has a weight, sort alphabetically.
      if ($a_weight === NULL && $b_weight === NULL) {
        return $a > $b ? 1 : -1;
      }
      elseif ($a_weight === NULL) {
        return 1;
      }
      elseif ($b_weight === NULL) {
        return -1;
      }
      elseif ($a_weight == $b_weight) {
        return 0;
      }
      else {
        return $a_weight > $b_weight ? 1 : -1;
      }
    });
    return $data;
  }

  /**
   * Extracts translatable data from an entity.
   *
   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
   *   The entity to get the translatable data from.
   *
   * @return array $data
   *   Translatable data.
   */
  public function extractTranslatableData(ContentEntityInterface $entity) {
    $field_definitions = $entity
      ->getFieldDefinitions();
    $exclude_field_types = [
      'language',
    ];
    $exclude_field_names = [
      'moderation_state',
    ];

    /** @var \Drupal\content_translation\ContentTranslationManagerInterface $content_translation_manager */
    $content_translation_manager = \Drupal::service('content_translation.manager');
    $is_bundle_translatable = $content_translation_manager
      ->isEnabled($entity
      ->getEntityTypeId(), $entity
      ->bundle());

    // Exclude field types from translation.
    $translatable_fields = array_filter($field_definitions, function (FieldDefinitionInterface $field_definition) use ($exclude_field_types, $exclude_field_names, $is_bundle_translatable) {
      if ($is_bundle_translatable) {

        // Field is not translatable.
        if (!$field_definition
          ->isTranslatable()) {
          return FALSE;
        }
      }
      elseif (!$field_definition
        ->getFieldStorageDefinition()
        ->isTranslatable()) {
        return FALSE;
      }

      // Field type matches field types to exclude.
      if (in_array($field_definition
        ->getType(), $exclude_field_types)) {
        return FALSE;
      }

      // Field name matches field names to exclude.
      if (in_array($field_definition
        ->getName(), $exclude_field_names)) {
        return FALSE;
      }

      // User marked the field to be excluded.
      if ($field_definition instanceof ThirdPartySettingsInterface) {
        $is_excluded = $field_definition
          ->getThirdPartySetting('tmgmt_content', 'excluded', FALSE);
        if ($is_excluded) {
          return FALSE;
        }
      }
      return TRUE;
    });
    \Drupal::moduleHandler()
      ->alter('tmgmt_translatable_fields', $entity, $translatable_fields);
    $data = array();
    foreach ($translatable_fields as $field_name => $field_definition) {
      $field = $entity
        ->get($field_name);
      $data[$field_name] = $this
        ->getFieldProcessor($field_definition
        ->getType())
        ->extractTranslatableData($field);
    }
    $embeddable_fields = static::getEmbeddableFields($entity);
    foreach ($embeddable_fields as $field_name => $field_definition) {
      $field = $entity
        ->get($field_name);

      /* @var \Drupal\Core\Field\FieldItemInterface $field_item */
      foreach ($field as $delta => $field_item) {
        foreach ($field_item
          ->getProperties(TRUE) as $property_key => $property) {

          // If the property is a content entity reference and it's value is
          // defined, than we call this method again to get all the data.
          if ($property instanceof EntityReference && $property
            ->getValue() instanceof ContentEntityInterface) {

            // All the labels are here, to make sure we don't have empty
            // labels in the UI because of no data.
            $data[$field_name]['#label'] = $field_definition
              ->getLabel();
            if (count($field) > 1) {

              // More than one item, add a label for the delta.
              $data[$field_name][$delta]['#label'] = t('Delta #@delta', array(
                '@delta' => $delta,
              ));
            }

            // Get the referenced entity.
            $referenced_entity = $property
              ->getValue();

            // Get the source language code.
            $langcode = $entity
              ->language()
              ->getId();

            // If the referenced entity is translatable and has a translation
            // use it instead of the default entity translation.
            if ($content_translation_manager
              ->isEnabled($referenced_entity
              ->getEntityTypeId(), $referenced_entity
              ->bundle()) && $referenced_entity
              ->hasTranslation($langcode)) {
              $referenced_entity = $referenced_entity
                ->getTranslation($langcode);
            }
            $data[$field_name][$delta][$property_key] = $this
              ->extractTranslatableData($referenced_entity);

            // Use the ID of the entity to identify it later, do not rely on the
            // UUID as content entities are not required to have one.
            $data[$field_name][$delta][$property_key]['#id'] = $property
              ->getValue()
              ->id();
          }
        }
      }
    }
    return $data;
  }

  /**
   * Determines whether an entity is moderated.
   *
   * @param \Drupal\Core\Entity\EntityInterface $entity
   *   The entity.
   *
   * @return bool
   *   TRUE if the entity is moderated. Otherwise, FALSE.
   */
  public static function isModeratedEntity(EntityInterface $entity) {
    if (!\Drupal::moduleHandler()
      ->moduleExists('content_moderation')) {
      return FALSE;
    }
    return \Drupal::service('content_moderation.moderation_information')
      ->isModeratedEntity($entity);
  }

  /**
   * Returns fields that should be embedded into the data for the given entity.
   *
   * Includes explicitly enabled fields and composite entities that are
   * implicitly included to the translatable data.
   *
   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
   *   The entity to get the translatable data from.
   *
   * @return \Drupal\Core\Field\FieldDefinitionInterface[] $embeddable_fields
   *   A list of field definitions that can be embedded.
   */
  public static function getEmbeddableFields(ContentEntityInterface $entity) {

    // Get the configurable embeddable references.
    $field_definitions = $entity
      ->getFieldDefinitions();
    $embeddable_field_names = \Drupal::config('tmgmt_content.settings')
      ->get('embedded_fields');
    $embeddable_fields = array_filter($field_definitions, function (FieldDefinitionInterface $field_definition) use ($embeddable_field_names) {
      return isset($embeddable_field_names[$field_definition
        ->getTargetEntityTypeId()][$field_definition
        ->getName()]);
    });

    // Get always embedded references.
    $content_translation_manager = \Drupal::service('content_translation.manager');
    foreach ($field_definitions as $field_name => $field_definition) {
      $storage_definition = $field_definition
        ->getFieldStorageDefinition();
      $property_definitions = $storage_definition
        ->getPropertyDefinitions();
      foreach ($property_definitions as $property_definition) {

        // Look for entity_reference properties where the storage definition
        // has a target type setting.
        if (in_array($property_definition
          ->getDataType(), [
          'entity_reference',
          'entity_revision_reference',
        ]) && ($target_type_id = $storage_definition
          ->getSetting('target_type'))) {
          $is_target_type_enabled = $content_translation_manager
            ->isEnabled($target_type_id);
          $target_entity_type = \Drupal::entityTypeManager()
            ->getDefinition($target_type_id);

          // Include current entity reference field that is considered a
          // composite and translatable or if the parent entity is considered a
          // composite as well. This allows to embed nested untranslatable
          // fields (For example: Paragraphs).
          if ($target_entity_type
            ->get('entity_revision_parent_type_field') && ($is_target_type_enabled || $entity
            ->getEntityType()
            ->get('entity_revision_parent_type_field'))) {
            $embeddable_fields[$field_name] = $field_definition;
          }
        }
      }
    }
    return $embeddable_fields;
  }

  /**
   * {@inheritdoc}
   */
  public function saveTranslation(JobItemInterface $job_item, $target_langcode) {

    /* @var \Drupal\Core\Entity\ContentEntityInterface $entity */
    $entity = $this
      ->getEntity($job_item);
    if (!$entity) {
      $job_item
        ->addMessage('The entity %id of type %type does not exist, the job can not be completed.', array(
        '%id' => $job_item
          ->getItemId(),
        '%type' => $job_item
          ->getItemType(),
      ), 'error');
      return FALSE;
    }

    /** @var \Drupal\Core\Entity\ContentEntityInterface $entity */
    if ($entity_revision = $this
      ->getPendingRevisionWithCompositeReferenceField($job_item)) {
      $title = $entity_revision
        ->hasLinkTemplate('latest-version') ? $entity_revision
        ->toLink(NULL, 'latest-version')
        ->toString() : $entity_revision
        ->label();
      $job_item
        ->addMessage('This translation cannot be accepted as there is a pending revision in the default translation. You must publish %title first before saving this translation.', [
        '%title' => $title,
      ], 'error');
      return FALSE;
    }
    $data = $job_item
      ->getData();
    $this
      ->doSaveTranslations($entity, $data, $target_langcode, $job_item);
    return TRUE;
  }

  /**
   * {@inheritdoc}
   */
  public function getItemTypes() {
    $entity_types = \Drupal::entityTypeManager()
      ->getDefinitions();
    $types = array();
    $content_translation_manager = \Drupal::service('content_translation.manager');
    foreach ($entity_types as $entity_type_name => $entity_type) {

      // Entity types with this key set are considered composite entities and
      // always embedded in others. Do not expose them as their own item type.
      if ($entity_type
        ->get('entity_revision_parent_type_field')) {
        continue;
      }
      if ($content_translation_manager
        ->isEnabled($entity_type
        ->id())) {
        $types[$entity_type_name] = $entity_type
          ->getLabel();
      }
    }
    return $types;
  }

  /**
   * {@inheritdoc}
   */
  public function getItemTypeLabel($type) {
    return \Drupal::entityTypeManager()
      ->getDefinition($type)
      ->getLabel();
  }

  /**
   * {@inheritdoc}
   */
  public function getType(JobItemInterface $job_item) {
    if ($entity = $this
      ->getEntity($job_item)) {
      $bundles = \Drupal::service('entity_type.bundle.info')
        ->getBundleInfo($job_item
        ->getItemType());
      $entity_type = $entity
        ->getEntityType();
      $bundle = $entity
        ->bundle();

      // Display entity type and label if we have one and the bundle isn't
      // the same as the entity type.
      if (isset($bundles[$bundle]) && $bundle != $job_item
        ->getItemType()) {
        return t('@type (@bundle)', array(
          '@type' => $entity_type
            ->getLabel(),
          '@bundle' => $bundles[$bundle]['label'],
        ));
      }

      // Otherwise just display the entity type label.
      return $entity_type
        ->getLabel();
    }
  }

  /**
   * {@inheritdoc}
   */
  public function getSourceLangCode(JobItemInterface $job_item) {
    if (!($entity = $this
      ->getEntity($job_item))) {
      return FALSE;
    }
    return $entity
      ->getUntranslated()
      ->language()
      ->getId();
  }

  /**
   * {@inheritdoc}
   */
  public function getExistingLangCodes(JobItemInterface $job_item) {
    if ($entity = $this
      ->getEntity($job_item)) {
      return array_keys($entity
        ->getTranslationLanguages());
    }
    return array();
  }

  /**
   * Saves translation data in an entity translation.
   *
   * @param \Drupal\Core\Entity\ContentEntityInterface $entity
   *   The entity for which the translation should be saved.
   * @param array $data
   *   The translation data for the fields.
   * @param string $target_langcode
   *   The target language.
   * @param \Drupal\tmgmt\JobItemInterface $item
   *   The job item.
   * @param bool $save
   *   (optional) Whether to save the translation or not.
   *
   * @throws \Exception
   *   Thrown when a field or field offset is missing.
   */
  protected function doSaveTranslations(ContentEntityInterface $entity, array $data, $target_langcode, JobItemInterface $item, $save = TRUE) {

    // If the translation for this language does not exist yet, initialize it.
    if (!$entity
      ->hasTranslation($target_langcode)) {
      $entity
        ->addTranslation($target_langcode, $entity
        ->toArray());
    }
    $translation = $entity
      ->getTranslation($target_langcode);
    $manager = \Drupal::service('content_translation.manager');
    if ($manager
      ->isEnabled($translation
      ->getEntityTypeId(), $translation
      ->bundle())) {
      $manager
        ->getTranslationMetadata($translation)
        ->setSource($entity
        ->language()
        ->getId());
    }
    foreach (Element::children($data) as $field_name) {
      $field_data = $data[$field_name];
      if (!$translation
        ->hasField($field_name)) {
        throw new \Exception("Field '{$field_name}' does not exist on entity " . $translation
          ->getEntityTypeId() . '/' . $translation
          ->id());
      }
      $field = $translation
        ->get($field_name);
      $field_processor = $this
        ->getFieldProcessor($field
        ->getFieldDefinition()
        ->getType());
      $field_processor
        ->setTranslations($field_data, $field);
    }
    $embeddable_fields = static::getEmbeddableFields($entity);
    foreach ($embeddable_fields as $field_name => $field_definition) {
      if (!isset($data[$field_name])) {
        continue;
      }
      $field = $translation
        ->get($field_name);
      $target_type = $field
        ->getFieldDefinition()
        ->getFieldStorageDefinition()
        ->getSetting('target_type');
      $is_target_type_translatable = $manager
        ->isEnabled($target_type);

      // In case the target type is not translatable, the referenced entity will
      // be duplicated. As a consequence, remove all the field items from the
      // translation, update the field value to use the field object from the
      // source language.
      if (!$is_target_type_translatable) {
        $field = clone $entity
          ->get($field_name);
        if (!$translation
          ->get($field_name)
          ->isEmpty()) {
          $translation
            ->set($field_name, NULL);
        }
      }
      foreach (Element::children($data[$field_name]) as $delta) {
        $field_item = $data[$field_name][$delta];
        foreach (Element::children($field_item) as $property) {

          // Find the referenced entity. In case we are dealing with
          // untranslatable target types, the source entity will be returned.
          if ($target_entity = $this
            ->findReferencedEntity($field, $field_item, $delta, $property, $is_target_type_translatable)) {
            if ($is_target_type_translatable) {

              // If the field is an embeddable reference and the property is a
              // content entity, process it recursively.
              // If the field is ERR and the target entity supports
              // the needs saving interface, do not save it immediately to avoid
              // creating two versions when content moderation is used but just
              // ensure it will be saved.
              $target_save = TRUE;
              if ($field
                ->getFieldDefinition()
                ->getType() == 'entity_reference_revisions' && $target_entity instanceof EntityNeedsSaveInterface) {
                $target_save = FALSE;
                $target_entity
                  ->needsSave();
              }
              $this
                ->doSaveTranslations($target_entity, $field_item[$property], $target_langcode, $item, $target_save);
            }
            else {
              $duplicate = $this
                ->createTranslationDuplicate($target_entity, $target_langcode);

              // Do not save the duplicate as it's going to be saved with the
              // main entity.
              $this
                ->doSaveTranslations($duplicate, $field_item[$property], $target_langcode, $item, FALSE);
              $translation
                ->get($field_name)
                ->set($delta, $duplicate);
            }
          }
        }
      }
    }
    if (static::isModeratedEntity($translation)) {

      // Use the given moderation status if set. Otherwise, fallback to the
      // configured one in TMGMT settings.
      if (isset($data['#moderation_state'][0])) {
        $moderation_state = $data['#moderation_state'][0];
      }
      else {
        $moderation_info = \Drupal::service('content_moderation.moderation_information');
        $workflow = $moderation_info
          ->getWorkflowForEntity($entity);
        $moderation_state = \Drupal::config('tmgmt_content.settings')
          ->get('default_moderation_states.' . $workflow
          ->id());
      }
      if ($moderation_state) {
        $translation
          ->set('moderation_state', $moderation_state);
      }
    }
    elseif (isset($data['#published'][0]) && $translation instanceof EntityPublishedInterface) {
      if ($data['#published'][0]) {
        $translation
          ->setPublished();
      }
      else {
        $translation
          ->setUnpublished();
      }
    }
    if ($entity
      ->getEntityType()
      ->isRevisionable()) {

      /** @var \Drupal\Core\Entity\TranslatableRevisionableStorageInterface $storage */
      $storage = \Drupal::entityTypeManager()
        ->getStorage($entity
        ->getEntityTypeId());
      if ($storage instanceof TranslatableRevisionableStorageInterface) {

        // Always create a new revision of the translation.
        $translation = $storage
          ->createRevision($translation, $translation
          ->isDefaultRevision());
        if ($entity instanceof RevisionLogInterface) {
          $translation
            ->setRevisionLogMessage($this
            ->t('Created by translation job <a href=":url">@label</a>.', [
            ':url' => $item
              ->getJob()
              ->toUrl()
              ->toString(),
            '@label' => $item
              ->label(),
          ]));
        }
      }
    }
    if ($save) {
      $translation
        ->save();
    }
  }

  /**
   * Creates a translation duplicate of the given entity.
   *
   * @param \Drupal\Core\Entity\ContentEntityInterface $target_entity
   *   The target entity to clone.
   * @param string $langcode
   *   Language code for all the clone entities created.
   *
   * @return \Drupal\Core\Entity\ContentEntityInterface
   *   New entity object with the data from the original entity. Not
   *   saved. No sub-entities are cloned.
   */
  protected function createTranslationDuplicate(ContentEntityInterface $target_entity, $langcode) {
    $duplicate = $target_entity
      ->createDuplicate();

    // Change the original language.
    if ($duplicate
      ->getEntityType()
      ->hasKey('langcode')) {
      $duplicate
        ->set($duplicate
        ->getEntityType()
        ->getKey('langcode'), $langcode);
    }
    return $duplicate;
  }

  /**
   * {@inheritdoc}
   */
  public function getPreviewUrl(JobItemInterface $job_item) {
    if ($job_item
      ->getJob()
      ->isActive() && !($job_item
      ->isAborted() || $job_item
      ->isAccepted())) {
      return new Url('tmgmt_content.job_item_preview', [
        'tmgmt_job_item' => $job_item
          ->id(),
      ], [
        'query' => [
          'key' => \Drupal::service('tmgmt_content.key_access')
            ->getKey($job_item),
        ],
      ]);
    }
    else {
      return NULL;
    }
  }

  /**
   * {@inheritdoc}
   */
  public function continuousSettingsForm(array &$form, FormStateInterface $form_state, Job $job) {
    $continuous_settings = $job
      ->getContinuousSettings();
    $element = array();
    $item_types = $this
      ->getItemTypes();
    asort($item_types);
    $entity_type_manager = \Drupal::entityTypeManager();
    foreach ($item_types as $item_type => $item_type_label) {
      $entity_type = $entity_type_manager
        ->getDefinition($item_type);
      $element[$entity_type
        ->id()]['enabled'] = array(
        '#type' => 'checkbox',
        '#title' => $item_type_label,
        '#default_value' => isset($continuous_settings[$this
          ->getPluginId()][$entity_type
          ->id()]) ? $continuous_settings[$this
          ->getPluginId()][$entity_type
          ->id()]['enabled'] : FALSE,
      );
      if ($entity_type
        ->hasKey('bundle')) {
        $bundles = \Drupal::service('entity_type.bundle.info')
          ->getBundleInfo($item_type);
        $element[$entity_type
          ->id()]['bundles'] = array(
          '#title' => $this
            ->getBundleLabel($entity_type),
          '#type' => 'details',
          '#open' => TRUE,
          '#states' => array(
            'invisible' => array(
              'input[name="continuous_settings[' . $this
                ->getPluginId() . '][' . $entity_type
                ->id() . '][enabled]"]' => array(
                'checked' => FALSE,
              ),
            ),
          ),
        );
        foreach ($bundles as $bundle => $bundle_label) {
          if (\Drupal::service('content_translation.manager')
            ->isEnabled($entity_type
            ->id(), $bundle)) {
            $element[$entity_type
              ->id()]['bundles'][$bundle] = array(
              '#type' => 'checkbox',
              '#title' => $bundle_label['label'],
              '#default_value' => isset($continuous_settings[$this
                ->getPluginId()][$entity_type
                ->id()]['bundles'][$bundle]) ? $continuous_settings[$this
                ->getPluginId()][$entity_type
                ->id()]['bundles'][$bundle] : FALSE,
            );
          }
        }
      }
    }
    return $element;
  }

  /**
   * {@inheritdoc}
   */
  public function shouldCreateContinuousItem(Job $job, $plugin, $item_type, $item_id) {
    $continuous_settings = $job
      ->getContinuousSettings();
    $entity = static::load($item_type, $item_id, $job
      ->getSourceLangcode());
    $translation_manager = \Drupal::service('content_translation.manager');
    $translation = $entity
      ->hasTranslation($job
      ->getTargetLangcode()) ? $entity
      ->getTranslation($job
      ->getTargetLangcode()) : NULL;
    $metadata = isset($translation) ? $translation_manager
      ->getTranslationMetadata($translation) : NULL;

    // If a translation exists and is not marked as outdated, no new job items
    // needs to be created.
    if (isset($translation) && !$metadata
      ->isOutdated()) {
      return FALSE;
    }
    else {
      if ($entity && $entity
        ->getEntityType()
        ->hasKey('bundle')) {

        // The entity type has bundles, check both the entity type setting and
        // the bundle.
        if (!empty($continuous_settings[$plugin][$item_type]['bundles'][$entity
          ->bundle()]) && !empty($continuous_settings[$plugin][$item_type]['enabled'])) {
          return TRUE;
        }
      }
      elseif (!empty($continuous_settings[$plugin][$item_type]['enabled'])) {
        return TRUE;
      }
    }
    return FALSE;
  }

  /**
   * Returns the bundle label for a given entity type.
   *
   * @param \Drupal\Core\Entity\EntityTypeInterface $entity_type
   *   The entity type.
   *
   * @return string
   *   The bundle label.
   */
  protected function getBundleLabel(EntityTypeInterface $entity_type) {
    if ($entity_type
      ->getBundleLabel()) {
      return $entity_type
        ->getBundleLabel();
    }
    if ($entity_type
      ->getBundleEntityType()) {
      return \Drupal::entityTypeManager()
        ->getDefinition($entity_type
        ->getBundleEntityType())
        ->getLabel();
    }
    return $this
      ->t('@label type', [
      '@label' => $entity_type
        ->getLabel(),
    ]);
  }

  /**
   * Returns the field processor for a given field type.
   *
   * @param string $field_type
   *   The field type.
   *
   * @return \Drupal\tmgmt_content\FieldProcessorInterface $field_processor
   *   The field processor for this field type.
   */
  protected function getFieldProcessor($field_type) {
    $definition = \Drupal::service('plugin.manager.field.field_type')
      ->getDefinition($field_type);
    return \Drupal::service('class_resolver')
      ->getInstanceFromDefinition($definition['tmgmt_field_processor']);
  }

  /**
   * @param \Drupal\Core\Field\FieldItemListInterface $field
   * @param array $field_item
   * @param $delta
   * @param $property
   * @param bool $is_target_type_translatable
   *   (optional) Whether the target entity type is translatable.
   *
   * @return \Drupal\Core\Entity\ContentEntityInterface|null
   */
  protected function findReferencedEntity(FieldItemListInterface $field, array $field_item, $delta, $property, $is_target_type_translatable = TRUE) {

    // If an id is provided, loop over the field item deltas until we find the
    // matching entity. In case of untranslatable target types return the
    // source target entity as it will be duplicated.
    if (isset($field_item[$property]['#id'])) {
      foreach ($field as $item_delta => $item) {
        if ($item->{$property} instanceof ContentEntityInterface) {

          /** @var ContentEntityInterface $referenced_entity */
          $referenced_entity = $item->{$property};
          if ($referenced_entity
            ->id() == $field_item[$property]['#id'] || $item_delta === $delta && !$is_target_type_translatable) {
            return $referenced_entity;
          }
        }
      }

      // @todo Support loading an entity, throw an exception or log a warning?
    }
    elseif ($field
      ->offsetExists($delta) && $field
      ->offsetGet($delta)->{$property} instanceof ContentEntityInterface) {
      return $field
        ->offsetGet($delta)->{$property};
    }
  }

  /**
   * Returns the source revision if it is a pending revision with an ERR field.
   *
   * @param \Drupal\tmgmt\JobItemInterface $job_item
   *
   * @return \Drupal\Core\Entity\ContentEntityInterface|null
   *   The source revision entity if it is a pending revision with an ERR field.
   */
  public function getPendingRevisionWithCompositeReferenceField(JobItemInterface $job_item) {

    // Get the latest revision of the default translation.

    /** \Drupal\Core\Entity\ContentEntityInterface|null $entity */
    $entity = static::load($job_item
      ->getItemType(), $job_item
      ->getItemId());
    if (!$entity) {
      return NULL;
    }

    // If the given revision is not the default revision, check if there is at
    // least one untranslatable composite entity reference revisions field and
    // fail the validation.
    if (!$entity
      ->isDefaultRevision()) {
      foreach ($entity
        ->getFieldDefinitions() as $definition) {
        if (in_array($definition
          ->getType(), [
          'entity_reference',
          'entity_reference_revisions',
        ]) && !$definition
          ->isTranslatable()) {
          $target_type_id = $definition
            ->getSetting('target_type');
          $entity_type_manager = \Drupal::entityTypeManager();
          if (!$entity_type_manager
            ->hasDefinition($target_type_id)) {
            continue;
          }

          // Check if the target entity type is considered a composite.
          if ($entity_type_manager
            ->getDefinition($target_type_id)
            ->get('entity_revision_parent_type_field')) {
            return $entity;
          }
        }
      }
    }
    return NULL;
  }

}