Rename Gatech mediaspace transcripts to the video title

mediaspace-transcript-rename.user.js

// ==UserScript==
// @name         Gatech Mediaspace: transcript named after video
// @version      1.1
// @match        https://mediaspace.gatech.edu/media/*
// @grant        GM_download
// @connect      www.kaltura.com
// @connect      cdnapisec.kaltura.com
// @run-at       document-end
// ==/UserScript==

(() => {
  "use strict";

  /* =========================
     DEBUG SECTION (disabled)
     Uncomment to enable logging
  ========================== */

  /*
  const DEBUG = true;
  const dlog = (...a) => console.log("[txdbg]", ...a);

  if (DEBUG) {
    dlog("script loaded", location.href);

    const links = document.querySelectorAll(
      'a.kms-ds-media-page-moduledata-attachment[href*="kaltura.com/api_v3/service/attachment_attachmentasset/action/serve/"]'
    );
    dlog("found transcript links", [...links].map(a => ({
      href: a.href,
      download: a.getAttribute("download")
    })));
  }
  */

  const transcriptSel =
    'a.kms-ds-media-page-moduledata-attachment[href*="kaltura.com/api_v3/service/attachment_attachmentasset/action/serve/"]';

  const sanitize = (s) =>
    s.replace(/[\/\\:*?"<>|]+/g, "_")
     .replace(/\s+/g, " ")
     .trim()
     .slice(0, 180);

  const getTitle = () => {
    const h = document.querySelector('h3.MuiTypography-h3, h3[class*="MuiTypography-h3"], h1');
    const t = (h?.textContent?.trim() || document.title.trim());
    return sanitize(t);
  };

  const isJson = (a) =>
    (a.getAttribute("download") || "").toLowerCase().endsWith(".json");

  document.addEventListener(
    "click",
    (e) => {
      const a = e.target.closest(transcriptSel);
      if (!a) return;
      if (isJson(a)) return;

      e.preventDefault();
      e.stopPropagation();

      const filename = `${getTitle()}.txt`;

      /* DEBUG download logging
      dlog("intercepted click", {
        href: a.href,
        originalDownloadAttr: a.getAttribute("download"),
        newName: filename
      });
      */

      GM_download({
        url: a.href,
        name: filename,
        saveAs: true,
        headers: { Referer: location.href },

        /* DEBUG callbacks
        onload: () => dlog("GM_download onload"),
        onerror: (err) => dlog("GM_download onerror", err),
        ontimeout: () => dlog("GM_download ontimeout"),
        */
      });
    },
    true
  );
})();