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Lucifer1999qn / Lucifer's Portal

// ==UserScript==
// @name         Lucifer's Portal
// @namespace    http://tampermonkey.net/
// @version      1.0.0
// @description  Login Portal Hcmus
// @author       Hoàng siêu cấp đẹp trai
// @license      MIT
// @supportURL   https://www.facebook.com/lcf.star
// @match        https://portal2.hcmus.edu.vn/Login.aspx
// @include      https://portal*.hcmus.edu.vn/Login.aspx*
// @grant        none
// ==/UserScript==
function addStyle(css) {
  var head, style;
  head = document.getElementsByTagName('head')[0];
  if (!head) {
    return;
  }
  style = document.createElement('style');
  style.type = 'text/css';
  style.innerHTML = css;
  head.appendChild(style);
}
addStyle('button {  color: white; text-align: center; margin-top: 20px;  line-height: 60px;  font-weight: bold;  padding: 0 40px;  background: salmon;  border: none; white-space: pre;}');
addStyle('button:hover {  background: lightsalmon;}')

var mssv;
var password;
var timeout;
var flagLogin = function () {
  var body = document.body;
  var textContent = body.textContent || body.innerText;
  return textContent.indexOf("Đăng nhập") > -1;
}

function login() {
  if (mssv == null || mssv == "") return;
  document.getElementsByName("ctl00$ContentPlaceHolder1$txtUsername")[0].value = mssv;
  document.getElementsByName("ctl00$ContentPlaceHolder1$txtPassword")[0].value = password;
  document.getElementsByName("ctl00$ContentPlaceHolder1$btnLogin")[0].click();
}

function reload() {
  window.location.reload();
}
var change = function () {
  localStorage.setItem("mssv", mssv = prompt("Nhập mssv nà:", ""));
  localStorage.setItem("password", password = prompt("Nhập password nà:", ""));
  clearTimeout(timeout);
  if ((mssv != null) && (password != null)) {
    timeout = setTimeout(login, 600);
  }
  else {
    localStorage.removeItem("mssv");
    localStorage.removeItem("password");
  }
};
var button = document.createElement("button");
button.innerHTML = "Đổi thông tin nà!<br>Made by Lucifer";
var body = document.getElementsByTagName("body")[0];
body.appendChild(button);
button.onclick = change;
document.body.insertBefore(button, document.body.childNodes[0]);

if (window.localStorage.getItem('mssv') === null) {
  change();
}
else {
  mssv = window.localStorage.getItem('mssv');
  password = window.localStorage.getItem('password');
}
timeout = setTimeout(login, 600);
setTimeout(reload, 5000);
while (!flagLogin()) {
  reload();
  login();
}