userscript: Zoom Web Client with less clicking

zoom.userscript.js

// ==UserScript==
// @name         Zoom Web Client with less clicking
// @description  Make using Web Client in Zoom a default and require less clicking.
// @author       Marek ‘saji’ Augustynowicz <marek.aug@gmail.com>
// @copyright    ISC
// @version      1.0.3
// @icon         https://st1.zoom.us/zoom.ico
// @supportURL   https://gist.github.com/marek-saji/184024f096be7b9ddf54272d6d225af8
//
// @updateURL    https://gist.githubusercontent.com/marek-saji/184024f096be7b9ddf54272d6d225af8/raw
// @downloadURL  https://gist.githubusercontent.com/marek-saji/184024f096be7b9ddf54272d6d225af8/raw
// @grant none
// @match https://*.zoom.us/j/*
// @match https://*.zoom.us/wc/*/join?*
// @match https://*.zoom.us/wc/join/*
// ==/UserScript==

const JOB_DEBOUNCE_MS = 100;
const JOB_MAX_TRIES = 10;

function log (...args)
{
  console.debug('zoom.userscript', ...args);
}

function debounce (callback)
{
  let timeoutId;
  return () => {
    clearTimeout(timeoutId);
    timeoutId = setTimeout(
      () => { callback(); },
      JOB_DEBOUNCE_MS
    );
  }
}

/**
 * Things we want to do rely on DOM elements be present. Re–try wevery time DOM is mutated.
 * Will stop trying when {@param job} returns true or after trying {@see JOB_MAX_TRIES} times.
 */
function tryUntilItWorks (jobs)
{
  const jobsName = jobs.map(job => job.name).join('+');
  log(jobsName, 'queued');

  const runJobs = () => {
    for (const job of jobs)
    {
      log(job.name, 'runs');
      if (job()) {
        log(job.name, 'succeeded');
        return true;
      }
    }
  };

  if (!runJobs())
  {
    let tries = 0;
    const observer = new MutationObserver(debounce(() => {
      tries += 1;
      if (tries > JOB_MAX_TRIES)
      {
        log(jobsName, 'tried to run', JOB_MAX_TRIES, 'times without a success. Giving up.');
        observer.disconnect();
      }
      else if (runJobs())
      {
        observer.disconnect();
      }
    }));
    observer.observe(document.documentElement, {
      childList: true,
      subtree: true,
    });
  }
}

/**
 * Click “Continue in Browser”
 */
function preJoin ()
{
  const joinFromBrowser = document.querySelector('[web_client]');
  if (joinFromBrowser)
  {
    joinFromBrowser.click();

    return true;
  }
}

/**
 * Escape a full–page iframe 🙄
 */
function escapeIFrame ()
{
  const iframe = document.querySelector('iframe#webclient');
  if (iframe?.src)
  {
    window.location.href = iframe.src;

    return true;
  }
}

/**
 * Make sure audio aud video are enabled and join
 */
function join ()
{
  const audioButton = document.getElementById('preview-audio-control-button');
  const videoButton = document.getElementById('preview-video-control-button');
  const joinButton = document.querySelector('.preview-join-button');

  if (audioButton && videoButton && joinButton)
  {
    if (audioButton.getAttribute('aria-label') === 'Unmute')
    {
      audioButton.click();
    }
    if (videoButton.getAttribute('aria-label') === 'Start Video')
    {
      videoButton.click();
    }
    joinButton.click();

    tryUntilItWorks([setup]);
    return true;
  }
}

/**
 * Post–join setup for things Zoom WebClient can’t remember
 * - Mirror video
 * - Grid view
 */
function setup ()
{
  // video mirror and grid view options might be rendered only after we open menus they are in for the first time
  // click menu buttons twice to open and close them, which will trigger the render
  const videoMenuButton = document.querySelector('[aria-label="More video controls"]');
  const viewMenuButton = document.querySelector('[aria-label="View"]');
  videoMenuButton?.click(); videoMenuButton?.click();
  viewMenuButton?.click(); viewMenuButton?.click();

  let videoMirrorButton = document.querySelector('[aria-label="Mirror My Video"]');
  let galleryViewButton = document.querySelector('[aria-label="Gallery View"]');

  if (videoMirrorButton && galleryViewButton)
  {
    if (!videoMirrorButton.classList.contains('video-option-menu__pop-menu--checked'))
    {
      videoMirrorButton.click();
    }

    if (!galleryViewButton.classList.contains('full-screen-widget__pop-menu--checked'))
    {
      galleryViewButton.click();
    }

    return true;
  }
}

tryUntilItWorks([preJoin, escapeIFrame, join, setup]);