class NodeEntityTranslation

class NodeEntityTranslation extends FieldableEntity {
    
    /**
     * {@inheritdoc}
     */
    public function query() {
        $query = $this->select('entity_translation', 'et')
            ->fields('et')
            ->fields('n', [
            'title',
            'type',
            'promote',
            'sticky',
        ])
            ->fields('nr', [
            'log',
            'timestamp',
        ])
            ->condition('et.entity_type', 'node')
            ->condition('et.source', '', '<>');
        $query->addField('nr', 'uid', 'revision_uid');
        $query->innerJoin('node', 'n', 'n.nid = et.entity_id');
        $query->innerJoin('node_revision', 'nr', 'nr.vid = et.revision_id');
        if (isset($this->configuration['node_type'])) {
            $query->condition('n.type', $this->configuration['node_type']);
        }
        return $query;
    }
    
    /**
     * {@inheritdoc}
     */
    public function prepareRow(Row $row) {
        $nid = $row->getSourceProperty('entity_id');
        $vid = $row->getSourceProperty('revision_id');
        $type = $row->getSourceProperty('type');
        $language = $row->getSourceProperty('language');
        // Get Field API field values.
        foreach ($this->getFields('node', $type) as $field_name => $field) {
            // Ensure we're using the right language if the entity is translatable.
            $field_language = $field['translatable'] ? $language : NULL;
            $row->setSourceProperty($field_name, $this->getFieldValues('node', $field_name, $nid, $vid, $field_language));
        }
        // If the node title was replaced by a real field using the Drupal 7 Title
        // module, use the field value instead of the node title.
        if ($this->moduleExists('title')) {
            $title_field = $row->getSourceProperty('title_field');
            if (isset($title_field[0]['value'])) {
                $row->setSourceProperty('title', $title_field[0]['value']);
            }
        }
        return parent::prepareRow($row);
    }
    
    /**
     * {@inheritdoc}
     */
    public function fields() {
        return [
            'entity_type' => $this->t('The entity type this translation relates to'),
            'entity_id' => $this->t('The entity ID this translation relates to'),
            'revision_id' => $this->t('The entity revision ID this translation relates to'),
            'language' => $this->t('The target language for this translation.'),
            'source' => $this->t('The source language from which this translation was created.'),
            'uid' => $this->t('The author of this translation.'),
            'status' => $this->t('Boolean indicating whether the translation is published (visible to non-administrators).'),
            'translate' => $this->t('A boolean indicating whether this translation needs to be updated.'),
            'created' => $this->t('The Unix timestamp when the translation was created.'),
            'changed' => $this->t('The Unix timestamp when the translation was most recently saved.'),
            'title' => $this->t('Node title'),
            'type' => $this->t('Node type'),
            'promote' => $this->t('Promoted to front page'),
            'sticky' => $this->t('Sticky at top of lists'),
            'log' => $this->t('Revision log'),
            'timestamp' => $this->t('The timestamp the latest revision of this node was created.'),
            'revision_uid' => $this->t('Revision authored by (uid)'),
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getIds() {
        return [
            'entity_id' => [
                'type' => 'integer',
                'alias' => 'et',
            ],
            'language' => [
                'type' => 'string',
                'alias' => 'et',
            ],
        ];
    }

}