class LocaleTranslation

class LocaleTranslation extends QueueWorkerBase implements ContainerFactoryPluginInterface {
  
  /**
   * The queue object.
   *
   * @var \Drupal\Core\Queue\QueueInterface
   */
  protected $queue;
  public function __construct(array $configuration, string $plugin_id, array $plugin_definition, protected ModuleHandlerInterface $moduleHandler, QueueInterface $queue, protected readonly CallableResolver $callableResolver) {
    parent::__construct($configuration, $plugin_id, $plugin_definition);
    $this->queue = $queue;
  }
  
  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
    return new static($configuration, $plugin_id, $plugin_definition, $container->get('module_handler'), $container->get('queue')
      ->get('locale_translation', TRUE), $container->get(CallableResolver::class));
  }
  
  /**
   * {@inheritdoc}
   *
   * The translation update functions executed here are batch operations which
   * are also used in translation update batches. The batch functions may need
   * to be executed multiple times to complete their task, typically this is the
   * translation import function. When a batch function is not finished, a new
   * queue task is created and added to the end of the queue. The batch context
   * data is needed to continue the batch task is stored in the queue with the
   * queue data.
   */
  public function processItem($data) {
    $this->moduleHandler
      ->loadInclude('locale', 'batch.inc');
    [$callable, $args] = $data;
    // We execute batch operation functions here to check, download and import
    // the translation files. Batch functions use a context variable as last
    // argument which is passed by reference. When a batch operation is called
    // for the first time a default batch context is created. When called
    // iterative (usually the batch import function) the batch context is passed
    // through via the queue and is part of the $data.
    $last = count($args) - 1;
    if (!is_array($args[$last]) || !isset($args[$last]['finished'])) {
      $batch_context = [
        'sandbox' => [],
        'results' => [],
        'finished' => 1,
        'message' => '',
      ];
    }
    else {
      $batch_context = $args[$last];
      unset($args[$last]);
    }
    $args = array_merge($args, [
      &$batch_context,
    ]);
    // Call the batch operation function.
    $resolvedCallable = $this->callableResolver
      ->getCallableFromDefinition($callable);
    $resolvedCallable(...$args);
    // If the batch operation is not finished we create a new queue task to
    // continue the task. This is typically the translation import task.
    if ($batch_context['finished'] < 1) {
      unset($batch_context['strings']);
      $this->queue
        ->createItem([
        $callable,
        $args,
      ]);
    }
  }

}