MenuLinkTranslation.php in Drupal 10

Namespace

Drupal\menu_link_content\Plugin\migrate\source\d6

File

core/modules/menu_link_content/src/Plugin/migrate/source/d6/MenuLinkTranslation.php

<?php

namespace Drupal\menu_link_content\Plugin\migrate\source\d6;

use Drupal\content_translation\Plugin\migrate\source\I18nQueryTrait;
use Drupal\migrate\Row;
use Drupal\menu_link_content\Plugin\migrate\source\MenuLink;

/**
 * Drupal 6 i18n menu link translations source from database.
 *
 * @MigrateSource(
 *   id = "d6_menu_link_translation",
 *   source_module = "i18nmenu"
 * )
 */
class MenuLinkTranslation extends MenuLink {
  use I18nQueryTrait;

  /**
   * Drupal 6 table names.
   */
  const I18N_STRING_TABLE = 'i18n_strings';

  /**
   * {@inheritdoc}
   */
  public function query() {

    // Ideally, the query would return rows for each language for each menu link
    // with the translations for both the title and description or just the
    // title translation or just the description translation. That query quickly
    // became complex and would be difficult to maintain.
    // Therefore, build a query based on i18nstrings table where each row has
    // the translation for only one property, either title or description. The
    // method prepareRow() is then used to obtain the translation for the other
    // property.
    // The query starts with the same query as menu_link.
    $query = parent::query();

    // Add in the property, which is either title or description. Cast the mlid
    // to text so PostgreSQL can make the join.
    $query
      ->leftJoin(static::I18N_STRING_TABLE, 'i18n', 'CAST([ml].[mlid] AS CHAR(255)) = [i18n].[objectid]');
    $query
      ->addField('i18n', 'lid');
    $query
      ->addField('i18n', 'property');

    // Add in the translation for the property.
    $query
      ->innerJoin('locales_target', 'lt', '[i18n].[lid] = [lt].[lid]');
    $query
      ->addField('lt', 'language');
    $query
      ->addField('lt', 'translation');
    return $query;
  }

  /**
   * {@inheritdoc}
   */
  public function prepareRow(Row $row) {
    if (!parent::prepareRow($row)) {
      return FALSE;
    }

    // Save the translation for this property.
    $property_in_row = $row
      ->getSourceProperty('property');

    // Set the i18n string table for use in I18nQueryTrait.
    $this->i18nStringTable = static::I18N_STRING_TABLE;

    // Get the translation for the property not already in the row and save it
    // in the row.
    $property_not_in_row = $property_in_row == 'title' ? 'description' : 'title';
    return $this
      ->getPropertyNotInRowTranslation($row, $property_not_in_row, 'mlid', $this->idMap);
  }

  /**
   * {@inheritdoc}
   */
  public function fields() {
    $fields = [
      'language' => $this
        ->t('Language for this menu.'),
      'title_translated' => $this
        ->t('Menu link title translation.'),
      'description_translated' => $this
        ->t('Menu link description translation.'),
    ];
    return parent::fields() + $fields;
  }

  /**
   * {@inheritdoc}
   */
  public function getIds() {
    $ids['language']['type'] = 'string';
    return parent::getIds() + $ids;
  }

}

Classes

Name	Description
MenuLinkTranslation	Drupal 6 i18n menu link translations source from database.