Updating all Drupal media thumbnails

I needed to update all the media thumbnails on my Drupal site, as they’d got confused somewhere along the way migrating from contrib media_entity to core media.

Using the batch updater function I wrote about previously this is pretty simple:

/**
 * Updates all media thumbnails.
 *
 * Implement hook_deploy_NAME().
 */
function my_module_deploy_0001_update_thumbnails_after_migration_to_core_media(&$sandbox) {

  $jobsLoader = function() {
    return \Drupal::entityTypeManager()->getStorage('media')
      ->getQuery()
      ->accessCheck(FALSE)
      ->execute();
  };

  $jobProcessor = function($id) {
    try {
      $storage = \Drupal::entityTypeManager()->getStorage('media');
      $media = $storage->load($id);
      foreach ($media->getTranslationLanguages() as $langcode => $data) {
        if ($media->hasTranslation($langcode)) {
          $translation = $media->getTranslation($langcode);
          \Drupal::queue('media_entity_thumbnail')
            ->createItem(['id' => $translation->id()]);
          \Drupal::logger('my_module')
            ->notice("Queued thumbail update for media entity " . $id . " " . $langcode);
        }
      }
    }
    catch (\Throwable $e) {
      \Drupal::logger('my_module')
        ->error("Error queuing thumbail update for media entity " . $id . ": " . $e->getMessage());
    }
  };

  return my_module_batch_updater($sandbox, $jobsLoader, $jobProcessor, 'media thumbnails queued');
}