class ContentTranslationMetadataWrapper

class ContentTranslationMetadataWrapper implements ContentTranslationMetadataWrapperInterface {
    
    /**
     * The wrapped entity translation.
     *
     * @var \Drupal\Core\Entity\FieldableEntityInterface|\Drupal\Core\TypedData\TranslatableInterface
     */
    protected $translation;
    
    /**
     * The content translation handler.
     *
     * @var \Drupal\content_translation\ContentTranslationHandlerInterface
     */
    protected $handler;
    
    /**
     * Initializes an instance of the content translation metadata handler.
     *
     * @param \Drupal\Core\Entity\EntityInterface $translation
     *   The entity translation to be wrapped.
     * @param ContentTranslationHandlerInterface $handler
     *   The content translation handler.
     */
    public function __construct(EntityInterface $translation, ContentTranslationHandlerInterface $handler) {
        $this->translation = $translation;
        $this->handler = $handler;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getSource() {
        return $this->translation
            ->get('content_translation_source')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setSource($source) {
        $this->translation
            ->set('content_translation_source', $source);
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function isOutdated() {
        return (bool) $this->translation
            ->get('content_translation_outdated')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setOutdated($outdated) {
        $this->translation
            ->set('content_translation_outdated', $outdated);
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getAuthor() {
        return $this->translation
            ->hasField('content_translation_uid') ? $this->translation
            ->get('content_translation_uid')->entity : $this->translation
            ->getOwner();
    }
    
    /**
     * {@inheritdoc}
     */
    public function setAuthor(UserInterface $account) {
        $field_name = $this->translation
            ->hasField('content_translation_uid') ? 'content_translation_uid' : 'uid';
        $this->setFieldOnlyIfTranslatable($field_name, $account->id());
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function isPublished() {
        $field_name = $this->translation
            ->hasField('content_translation_status') ? 'content_translation_status' : 'status';
        return (bool) $this->translation
            ->get($field_name)->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setPublished($published) {
        $field_name = $this->translation
            ->hasField('content_translation_status') ? 'content_translation_status' : 'status';
        $this->setFieldOnlyIfTranslatable($field_name, $published);
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCreatedTime() {
        $field_name = $this->translation
            ->hasField('content_translation_created') ? 'content_translation_created' : 'created';
        return $this->translation
            ->get($field_name)->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setCreatedTime($timestamp) {
        $field_name = $this->translation
            ->hasField('content_translation_created') ? 'content_translation_created' : 'created';
        $this->setFieldOnlyIfTranslatable($field_name, $timestamp);
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getChangedTime() {
        return $this->translation
            ->hasField('content_translation_changed') ? $this->translation
            ->get('content_translation_changed')->value : $this->translation
            ->getChangedTime();
    }
    
    /**
     * {@inheritdoc}
     */
    public function setChangedTime($timestamp) {
        $field_name = $this->translation
            ->hasField('content_translation_changed') ? 'content_translation_changed' : 'changed';
        $this->setFieldOnlyIfTranslatable($field_name, $timestamp);
        return $this;
    }
    
    /**
     * Updates a field value, only if the field is translatable.
     *
     * @param string $field_name
     *   The name of the field.
     * @param mixed $value
     *   The field value to be set.
     */
    protected function setFieldOnlyIfTranslatable($field_name, $value) {
        if ($this->translation
            ->getFieldDefinition($field_name)
            ->isTranslatable()) {
            $this->translation
                ->set($field_name, $value);
        }
    }

}