dias_atividade.js

// ==UserScript==
// @name         Dias Atividade
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Adiciona indicador de dias para conclusão da atividade
// @author       Marcus Duarte<marcusedu@hotmail.com>
// @match        https://colaboraread.com.br/aluno/timeline/index/*
// @icon         https://www.google.com/s2/favicons?domain=colaboraread.com.br
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function date_diff_indays(date1, date2) {
        let dt1 = new Date(date1);
        let dt2 = new Date(date2);
        return Math.floor((Date.UTC(dt2.getFullYear(), dt2.getMonth(), dt2.getDate()) - Date.UTC(dt1.getFullYear(), dt1.getMonth(), dt1.getDate()) ) /(1000 * 60 * 60 * 24));
    }


    [...document.getElementsByClassName('text-muted')].filter((e)=>e.childElementCount == 2).filter((e)=>e.textContent.includes('Período')).forEach(e => {
        var deadlineList = e.textContent.trim().substr(-8).split('/').map(e=>parseInt(e));
        var deadline = new Date(deadlineList[2]+2000,deadlineList[1]-1,deadlineList[0]);
        var bNode = document.createElement("STRONG");
        let days = date_diff_indays(Date(),deadline);
        if (days < 0) {
            bNode.style.color = 'red';
        } else if(days > 0 && days < 2){
            bNode.style.color = 'yellow';
        } else if(days > 2) {
            bNode.style.color = 'green';
        }
        bNode.appendChild(document.createTextNode(" ("+days+")"));
        e.appendChild(bNode);
    })
})();