SearchPage.php

<?php

namespace Drupal\search\Plugin\migrate\source\d7;

use Drupal\migrate\Row;
use Drupal\migrate_drupal\Plugin\migrate\source\Variable;

/**
 * Drupal 7 search active core modules and rankings source from database.
 *
 * For available configuration keys, refer to the parent classes.
 *
 * @see \Drupal\migrate_drupal\Plugin\migrate\source\Variable
 * @see \Drupal\migrate\Plugin\migrate\source\SqlBase
 * @see \Drupal\migrate\Plugin\migrate\source\SourcePluginBase
 *
 * @MigrateSource(
 *   id = "d7_search_page",
 *   source_module = "search"
 * )
 */
class SearchPage extends Variable {

  /**
   * {@inheritdoc}
   */
  protected function initializeIterator() {
    return new \ArrayIterator($this
      ->values());
  }

  /**
   * {@inheritdoc}
   */
  protected function values() {
    $search_active_modules = $this
      ->variableGet('search_active_modules', '');
    $values = [];
    foreach ([
      'node',
      'user',
    ] as $module) {
      if (isset($search_active_modules[$module])) {

        // Add a module key to identify the source search provider. This value
        // is used in the EntitySearchPage destination plugin.
        $tmp = [
          'module' => $module,
          'status' => $search_active_modules[$module],
        ];

        // Add the node_rank_* variables (only relevant to the node module).
        if ($module === 'node') {
          $tmp = array_merge($tmp, parent::values());
        }
        $values[] = $tmp;
      }
    }
    return $values;
  }

  /**
   * {@inheritdoc}
   */
  public function fields() {
    return [
      'module' => $this
        ->t('The module providing a search page.'),
      'status' => $this
        ->t('Whether or not this module is enabled for search.'),
    ];
  }

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

  /**
   * {@inheritdoc}
   */
  protected function doCount() {
    return $this
      ->initializeIterator()
      ->count();
  }

  /**
   * {@inheritdoc}
   */
  public function prepareRow(Row $row) {
    $exists = $this
      ->moduleExists($row
      ->getSourceProperty('module'));
    $row
      ->setSourceProperty('module_exists', $exists);
    return parent::prepareRow($row);
  }

}