// ==UserScript==
// @name         Remove Title and Change Favicon on WhatsApp Web
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  Remove the title and change the favicon on WhatsApp Web every 5 seconds
// @match        https://web.whatsapp.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function modifyTab() {
        document.title = '';

        const faviconSize = 32;
        const canvas = document.createElement('canvas');
        canvas.width = faviconSize;
        canvas.height = faviconSize;
        const ctx = canvas.getContext('2d');

        ctx.beginPath();
        ctx.arc(faviconSize / 2, faviconSize / 2, faviconSize / 2, 0, 2 * Math.PI);
        ctx.fillStyle = '#28834a';
        ctx.fill();

        const faviconUrl = canvas.toDataURL('image/png');

        const linkElements = document.querySelectorAll("link[rel*='icon']");
        linkElements.forEach(link => link.parentNode.removeChild(link));

        const newFavicon = document.createElement('link');
        newFavicon.rel = 'icon';
        newFavicon.href = faviconUrl;
        document.head.appendChild(newFavicon);

        // remove badge on list messaages
        const gridCells = document.querySelectorAll('[role="gridcell"]');

        gridCells.forEach(gridCell => {
            const deepestParent = gridCell.querySelector('*');

            if (deepestParent) {
                const lastChild = deepestParent.lastElementChild;

                if (lastChild) {

                    if (lastChild.hasAttribute('style')) {
                        deepestParent.removeChild(lastChild);
                    }
                }
            }
        });
    }

    setInterval(modifyTab, 5000);

    modifyTab();
})();