class UserEntityTranslation

class UserEntityTranslation extends FieldableEntity {
    
    /**
     * {@inheritdoc}
     */
    public function query() {
        $query = $this->select('entity_translation', 'et')
            ->fields('et')
            ->condition('et.entity_type', 'user')
            ->condition('et.source', '', '<>');
        return $query;
    }
    
    /**
     * {@inheritdoc}
     */
    public function prepareRow(Row $row) {
        $uid = $row->getSourceProperty('entity_id');
        $language = $row->getSourceProperty('language');
        // Get Field API field values.
        foreach ($this->getFields('user') 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('user', $field_name, $uid, NULL, $field_language));
        }
        return parent::prepareRow($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.'),
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getIds() {
        return [
            'entity_id' => [
                'type' => 'integer',
            ],
            'language' => [
                'type' => 'string',
            ],
        ];
    }

}