script.user.js

// ==UserScript==
// @name         Mrgaton youtube downloader
// @namespace    http://tampermonkey.net/
// @require      https://gato.ovh/CDN/Scripts/CrUn.js
// @version      2024-06-6
// @description  Download using crun and my awesome program
// @author       Mrgaton
// @match        https://www.youtube.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=youtube.com
// @downloadURL  https://raw.githubusercontent.com/Mrgaton/YoutuveDownloader/master/script.user.js
// @updateURL 	 https://raw.githubusercontent.com/Mrgaton/YoutuveDownloader/master/script.user.js

// @grant        GM.xmlHttpRequest
// @grant        GM.getValue
// @grant        GM.setValue
// ==/UserScript==

const downloaderUrl =
  "https://github.com/Mrgaton/YoutuveDownloader/releases/latest/download/Youtube.downloader.exe";

const youtubeDownloadSVG =
  '<path d="M17 18v1H6v-1h11zm-.5-6.6-.7-.7-3.8 3.7V4h-1v10.4l-3.8-3.8-.7.7 5 5 5-4.9z">';

async function Sleep(time) {
  await new Promise((r) => setTimeout(r, time));
}

(async function () {
  "use strict";
  /**/

  body.addEventListener("yt-navigate-finish", async function (event) {
    let time = 200;

    while (!document.getElementById("description-inner")) {
      log("Waiting buttons to load");
      await Sleep(time);
      if (time <= 2000) time += 200;
    }

    await Sleep(500);

    log("Initializing buttons events");

    initScript();
  });

  log("Initializing mutation observer");
  new MutationObserver(nodeAddedCallback).observe(document, {
    childList: true,
    subtree: true,
  });
})();

function log(data) {
  const dataType = typeof data;

  if (dataType === "string" || dataType === "boolean") {
    console.debug("[MrgatonYTDownloader]: " + data);
  } else {
    console.debug("[MrgatonYTDownloader]:");
    console.debug(data);
  }
}

async function initScript() {
  log("Installing script");

  /*addElements(
		document.getElementsByClassName(
			'yt-spec-button-shape-next yt-spec-button-shape-next--tonal yt-spec-button-shape-next--mono yt-spec-button-shape-next--size-m yt-spec-button-shape-next--icon-leading'
		)
	);*/

  addElement(
    document.querySelector(
      "#flexible-item-buttons > ytd-download-button-renderer > ytd-button-renderer > yt-button-shape > button",
    ),
  );

  addElements(
    document.getElementsByClassName("style-scope ytd-menu-popup-renderer"),
  );
}

function addElements(buttons) {
  for (let elem in buttons) {
    const button = buttons[elem];

    addElement(button);
  }
}

function addElement(button) {
  if (button.innerHTML) {
    if (!button.hooked) {
      button.addEventListener("click", () => downloadClicked(button));

      button.hooked = true;
    }
  }
}

function downloadClicked(button) {
  log("YouTube button clicked " + button.label);
  log(button.innerHTML.includes(youtubeDownloadSVG));
  //log(button);

  if (!button.innerHTML.includes(youtubeDownloadSVG)) return;

  downloadVideoCore();
}

function downloadVideoCore() {
  /*if (!CrunHelper.installed()) {
		alert('Error crun no esta instalado por favor instalalo primero');
		return;
	}*/

  log(button);
  log("Vamos a descargar: " + window.location.href);

  log(CrunHelper);

  if (confirm("Are you want to download this video?\n\nPress OK or Cancel.")) {
    CrunHelper.runProcess(
      downloaderUrl,
      '"video=' + window.location.href + '"',
    );
  }
}

/*document.addEventListener('yt-navigate-start', process);
if (document.body) process();
else document.addEventListener('DOMContentLoaded', process);

function process() {
	if (!location.pathname.startsWith('/playlist')) {
		return;
	}
	var seconds = [].reduce.call(
		document.getElementsByClassName('timestamp'),
		function (sum, ts) {
			const minsec = ts.textContent.split(':');
			return sum + minsec[0] * 60 + minsec[1] * 1;
		},
		0
	);
	if (!seconds) {
		console.warn('Got no timestamps. Empty playlist?');
		return;
	}
	const timeHMS = new Date(seconds * 1000)
		.toUTCString()
		.split(' ')[4]
		.replace(/^[0:]+/, ''); // trim leading zeroes
	document
		.querySelector('.pl-header-details')
		.insertAdjacentHTML('beforeend', '<li>Length: ' + timeHMS + '</li>');
}*/

function nodeAddedCallback(mutationList, observer) {
  mutationList.forEach((mutation) => {
    if (mutation.type === "childList") {
      mutation.addedNodes.forEach((node) => {
        //log(node.nodeName);

        if (node.nodeName === "YTD-OFFLINE-PROMO-RENDERER") {
          //console.log(mutation);
          node.remove(); // Remove the node
        } else if (
          node.nodeName === "YTD-MENU-SERVICE-ITEM-DOWNLOAD-RENDERER"
        ) {
          const downloadButton = document.getElementsByClassName(
            "ytd-menu-service-item-download-renderer",
          )[0];

          downloadButton.onclick = downloadVideoCore;
        }
      });
    }
  });
}