inotes-web-notifier.user.js

// ==UserScript==
// @name        inotes-web-notifier
// @namespace   net.herezia
// @description Notifies user when new mails arrive in the web version of IBM iNotes
// @include     http://YOUR_INOTES_URL
// @version     1
// @grant       none
// ==/UserScript==
let shouldNotify = false;
function onVisibilityChanged() {
  if (document[hidden]) {
    shouldNotify = true;
  } else {
    shouldNotify = false;
  }
}

setInterval(checkForNewMails, 60000);
function checkForNewMails() {
  if (document.activeElement.nodeName !== "FRAME") {
    return;
  }
  if (shouldNotify) {
    const mainFrame = document.getElementById('e-frameset').querySelector('#s_MainFrame').contentWindow.document;
    const inboxMenuItem = mainFrame.querySelector("[title='Courrier en arrivée']");
    const refreshButton = mainFrame.querySelector('#e-actions-mailview-inbox-refresh');
    inboxMenuItem.click(); // show the inbox back in case we were reading or writing a mail in another tab
    refreshButton.click();
  }
  warnIfNewMails();
}
let lastUnreadMailsCount = 0;
const MESSAGE_COUNTER = /.+\((\d+)\)/;
function warnIfNewMails() {
  const mainFrame = document.getElementById('e-frameset').querySelector('#s_MainFrame').contentWindow.document;
  const inboxMails = mainFrame.querySelector('#e-mailoutline-content > div:first-child table tbody tr td:nth-child(3)').innerHTML;
  let unreadMailsCount = MESSAGE_COUNTER.test(inboxMails) ? inboxMails.match(MESSAGE_COUNTER)[1] : 0;
  unreadMailsCount = parseInt(unreadMailsCount);
  let newMailsCount = unreadMailsCount - lastUnreadMailsCount;
  if (shouldNotify && newMailsCount > 0) {
    warnNewMails(newMailsCount, unreadMailsCount);
  }
  lastUnreadMailsCount = unreadMailsCount;
}
function warnNewMails(newMailsCount, unreadMails) {
  new Notification('IBM iNotes', {
    icon: getFavicon(),
    body: `${newMailsCount} new email${plural(newMailsCount)} / ${unreadMails} unread mail${plural(unreadMails)}`,
    renotify: true,
    requireInteraction: true
  })
}

if (typeof document.hidden !== "undefined") { // Opera 12.10 and Firefox 18 and later support 
  hidden = "hidden";
  visibilityChange = "visibilitychange";
} else if (typeof document.msHidden !== "undefined") {
  hidden = "msHidden";
  visibilityChange = "msvisibilitychange";
} else if (typeof document.webkitHidden !== "undefined") {
  hidden = "webkitHidden";
  visibilityChange = "webkitvisibilitychange";
}
if (typeof document.addEventListener === "undefined" || typeof document[hidden] === "undefined") {
  console.error("Requires a browser that supports the Page Visibility API.");
} else if (document.activeElement.nodeName !== "FRAME") {
  // Handle page visibility change
  document.addEventListener(visibilityChange, onVisibilityChanged, false);
  Notification.requestPermission();
}

function getFavicon() {
  return document.querySelector("link[rel='shortcut icon']").href;
}
function plural(input) {
  return input > 1 ? "s" : "";
}