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MusicBrainz
12

Made a hacky userscript that seems to be working (for my use case), posting if anyone else might want it. (It’s probably full of bugs)

The changes it makes are: hides thumbnails, runs multiple uploads simultaneously, prompts before closing the window, and (untested - edit: sorry, retries don’t work reliably, I actually had to delete the “disabled” attribute from the button using right-click→Inspect to retry in one case) tries to automatically retry failed uploads.

Thanks again all for your pointers!

// ==UserScript==
// @name         CAA upload faster
// @description  CAA upload faster
// @version      2025-7-19
// @license      GPL-2+ https://github.com/metabrainz/musicbrainz-server/blob/master/COPYING.md
// @namespace    https://
// @match        https://musicbrainz.org/release/*/add-cover-art
// @match        https://*.musicbrainz.org/release/*/add-cover-art
// @grant        none
// ==/UserScript==


(function() {
    'use strict';

    // https://tickets.metabrainz.org/browse/MBS-12524

    const removePreviews = function() {
        document.querySelectorAll('.uploader-preview-image').forEach(e => e.remove());
        window.setTimeout(removePreviews, 1000);
    }

    removePreviews();

    MB.Art.file_data_uri = function (file) {
      var deferred = $.Deferred();

      window.setTimeout(deferred.resolve(''), 100);

      return deferred.promise();
    };

    MB.Art.add_art_submit = function (gid, upvm) {
      var pos = parseInt($(`#id-add-cover-art\\.position`).val(), 10);

      $('.add-files.row').hide();
      $(`#cover-art-position-row`).hide();
      $('#content')[0].scrollIntoView();
      $(`#add-cover-art-submit`).prop('disabled', true);

      var queue = MB.Art.process_upload_queue(gid, upvm, pos);

      executePromisesWithDelay(queue)
        .done(function () {
          window.location.href =
            `/release/${gid}/cover-art`;
        })
        .fail(function () {
          $(`#add-cover-art-submit`).prop('disabled', false);
        });
    };

// Prevent accidentally closing tab, from https://stackoverflow.com/a/10311375
window.onbeforeunload = function (e) {
    e = e || window.event;

    // For IE and Firefox prior to version 4
    if (e) {
        e.returnValue = 'Sure?';
    }

    // For Safari
    return 'Sure?';
};

    // This function is modified by Microsoft Copilot (sigh...) based loosely on https://github.com/metabrainz/musicbrainz-server/blob/fb0b86872f180e740360bd63d5efd1d99c8e604d/root/static/scripts/edit/MB/Art.js#L631
    function executePromisesWithDelay(promises) {
      var deferred = $.Deferred();
      var results = [];
      var pendingCount = promises.length;
      var delay = 10000; // Delay in milliseconds

      function executePromise(index) {
        if (index >= promises.length) return;

        setTimeout(() => {
          promises[index]()
            .then(
              (result) => {
                results[index] = result; // Store the result
                if (--pendingCount === 0) {
                  deferred.resolve(results);
                }
              },
              () => {
                // Retry the failed promise
                promises[index]().then((result) => {
                  results[index] = result;
                  if (--pendingCount === 0) {
                    deferred.resolve(results);
                  }
              });
            });

          // Start the next promise execution after delay
          executePromise(index + 1);
        }, index * delay);
      }

      executePromise(0); // Start executing promises
      return deferred.promise();
    }

})();
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