(function ($) {

/**

 * Attaches the batch behavior to progress bars.

 */

Drupal.behaviors.batch = {

  attach: function (context, settings) {

    $('#progress', context).once('batch', function () {

      var holder = $(this);

      // Success: redirect to the summary.

      var updateCallback = function (progress, status, pb) {

        if (progress == 100) {

          pb.stopMonitoring();

          window.location = settings.batch.uri + '&op=finished';

        }

      };

      var errorCallback = function (pb) {

        holder.prepend($('<p class="error"></p>').html(settings.batch.errorMessage));

        $('#wait').hide();

      };

      var progress = new Drupal.progressBar('updateprogress', updateCallback, 'POST', errorCallback);

      progress.setProgress(-1, settings.batch.initMessage);

      holder.append(progress.element);

      progress.startMonitoring(settings.batch.uri + '&op=do', 10);

    });

  }

};

})(jQuery);