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VGMLoaderX

Automatically downloads albums from KHInsider without an account.

// ==UserScript==
// @name               VGMLoaderX
// @name:de            VGMLoaderX
// @name:en            VGMLoaderX
// @namespace          sun/userscripts
// @version            1.0.26
// @description        Automatically downloads albums from KHInsider without an account.
// @description:de     Lädt Alben von KHInsider automatisch und ohne Account herunter.
// @description:en     Automatically downloads albums from KHInsider without an account.
// @compatible         chrome
// @compatible         edge
// @compatible         firefox
// @compatible         opera
// @compatible         safari
// @homepageURL        https://forgejo.sny.sh/sun/userscripts
// @supportURL         https://forgejo.sny.sh/sun/userscripts/issues
// @contributionURL    https://liberapay.com/sun
// @contributionAmount €1.00
// @author             Sunny <sunny@sny.sh>
// @include            https://downloads.khinsider.com/game-soundtracks/album/*
// @match              https://downloads.khinsider.com/game-soundtracks/album/*
// @connect            vgmdownloads.com
// @connect            vgmsite.com
// @connect            vgmtreasurechest.com
// @run-at             document-end
// @inject-into        page
// @grant              GM.xmlHttpRequest
// @grant              GM_xmlhttpRequest
// @noframes
// @require            https://unpkg.com/@zip.js/zip.js/dist/zip.js
// @require            https://unpkg.com/file-saver
// @require            https://greasemonkey.github.io/gm4-polyfill/gm4-polyfill.js
// @icon               https://forgejo.sny.sh/sun/userscripts/raw/branch/main/icons/VGMLoaderX.ico
// @copyright          2021-present, Sunny (https://sny.sh/)
// @license            Hippocratic License; https://forgejo.sny.sh/sun/userscripts/src/branch/main/LICENSE.md
// ==/UserScript==

(() => {
  for (const x of document.querySelectorAll('a[href^="/cp/add_album/"]')) {
    x.addEventListener("click", (e) => {
      e.preventDefault();

      let format = Array(
        ...document.querySelectorAll("#songlist_header th[align=right]"),
      ).map((x) => x.textContent);
      if (format.length === 1) {
        format = format[0];
      } else {
        const input = prompt(
          `Please enter your desired format (one of ${format.join(", ")}):`,
          format[0],
        );

        if (!input) return;
        if (!format.includes(input.toUpperCase())) {
          format = format[0];
          alert(`Invalid format supplied. Using ${format} instead.`);
        } else {
          format = input;
        }
      }

      const element = document.getElementsByClassName("albumMassDownload")[0];
      element.style.height = "auto";
      element.style.marginBottom = "2em";

      const input = eval(
        document
          .querySelector("#pageContent script")
          .textContent.slice(5, -3)
          .replace("function", "function x")
          .replace("return p}", "return p}x"),
      );

      const mediaPath = input.match(/mediaPath='(.+?)'/)[1];
      const tracks = JSON.parse(
        input.match(/tracks=(\[.+?,\])/)[1].replace(",]", "]"),
      );
      const output = tracks.map(
        (x) =>
          `${
            mediaPath + x.file.split(".").slice(0, -1).join(".")
          }.${format.toLowerCase()}`,
      );
      const names = tracks.map((x) => x.name);

      const blobWriter = new zip.BlobWriter("application/zip");
      const writer = new zip.ZipWriter(blobWriter);

      function forSync(i) {
        element.innerHTML = `Downloading track ${i + 1} of ${output.length} (${names[i] || `Track ${i + 1}`})...`;
        GM.xmlHttpRequest({
          method: "GET",
          url: output[i],
          responseType: "blob",
          onload: async (response) => {
            await writer.add(
              decodeURIComponent(output[i].split("/").pop()),
              new zip.BlobReader(response.response),
            );

            if (output[i + 1]) {
              forSync(i + 1);
            } else {
              await writer.close();
              const blob = await blobWriter.getData();
              saveAs(
                blob,
                `${document.getElementsByTagName("h2")[0].textContent}.zip`,
              );
              element.innerHTML =
                "Album successfully downloaded. ZIP file has been passed to the browser.";
            }
          },
        });
      }
      forSync(0);
    });
  }
})();