Add extra source records to migrate #drupal8 #drupal9 #migrate

Redirect.php

<?php

final class Redirect extends SqlBase {

  /**
   * Return list of additional redirects that doesn't exist in source db.
   *
   * Some redirects are not in db, but we need to add them.
   *
   * @return array[]
   */
  private function getExtraRedirects(): array {
    return [
      [
        // Let's use "virtual" rid, physical rids ends on 1800.
        'rid' => 2000,
        'redirect_source__path' => 'visitor',
        'redirect_redirect__uri' => 'internal:/node/1111',
        'status_code' => 301,
        // Let's mark this is a new redirect.
        'created' => time(),
        'migrate_map_sourceid1' => null,
        'migrate_map_source_row_status' => null
      ],
      [
        // Let's use "virtual" rid, physical rids ends on 1800.
        'rid' => 2001,
        'redirect_source__path' => 'view',
        'redirect_redirect__uri' => 'internal:/node/2222',
        'status_code' => 301,
        // Let's mark this is a new redirect.
        'created' => time(),
        'migrate_map_sourceid1' => null,
        'migrate_map_source_row_status' => null
      ]
    ];
  }

  /**
   * Add extra redirects from static list into db results.
   */
  protected function initializeIterator(): \Iterator {
    $iterator = parent::initializeIterator();
    $extraRedirects = new \ArrayObject($this->getExtraRedirects());
    $extraItemsIterator = new \IteratorIterator($extraRedirects);

    $allRedirectsIterator = new \AppendIterator();
    $allRedirectsIterator->append($iterator);
    $allRedirectsIterator->append($extraItemsIterator);
    return $allRedirectsIterator;
  }

  /**
   * Make records counting work with our extra items.
   */
  protected function doCount(): int {
    $count = parent::doCount();
    return $count + count($this->getExtraRedirects());
  }

}