// ==UserScript==
// @match       *://*/*
// @name        YGGTorrent infinite session
// @description Stay signed in for real
// @grant       GM.getValue
// @grant       GM.setValue
// @grant       GM.deleteValue
// @version     1.1.0
// @author      KaKi87
// @license     GPL-3.0-or-later
// @namespace   https://git.kaki87.net/KaKi87/userscripts/src/branch/master/YGGTorrentInfiniteSession
// ==/UserScript==
/*
Copyright (C) 2020 - KaKi87
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see https://www.gnu.org/licenses/.
*/
/*
* [ Function ] Get logout link
*
* NOTE : link not in DOM while logged out
*
*/
const getLogout = () => document.querySelector('[href$="/user/logout"]');
/*
* [ Event handler ] Delete credentials on logout
*
*/
const createLogoutHandler = () => {
const logout = getLogout();
if(!logout) return;
logout.addEventListener('click', async event => {
if(event.isTrusted)
{
event.preventDefault();
await GM.deleteValue('username');
await GM.deleteValue('password');
logout.click();
}
}, true);
}
/*
* [ Event listener ] Login callback
*
*/
const onceLoggedIn = callback => {
(function waitForLogin(){
if(getLogout()) callback();
else setTimeout(waitForLogin, 150);
})();
};
/*
* [ Main ]
*
*/
document.addEventListener('readystatechange', async () => {
if(document.readyState !== 'complete') return;
/*
* [Step #0] Misc
*
* Hide native ads
*
*/
document.styleSheets[0].insertRule('.ad-alert-wrapper { display: none; }');
/*
* [ Step #1 ] Smartly detect YGGTorrent website
*
* despite frequent domain name changes
*
* using regular expression
*
* NOTE : although this expression is pretty strict,
*
* it will match any "*.ygg.tld" and "*.yggtorrent.tld"
*
*/
if(!window.location.href.match(new RegExp([
//  EXPRESSION    |     DESIGNATION  | COMMENT
'^'             , //  start
'https:\/\/'    , //  protocol       | http_s_ only
'([^.]+\.)?'    , //  subdomain      | optional
'ygg(torrent)?' , //  domain         | "ygg" or "yggtorrent"
'\.[^.]+'       , //  extension      | aka. TLD
'(\/.+)?'       , //  path           | optional
'$'               //  end
].join('')))) return;
/*
* [ Step #2 ] Get login form
*
* NOTE : form exists in DOM while logged in
*
*/
const form = document.querySelector('#user-login');
if(!form) return;
const
formUsername = form.querySelector('[type=text]'),
formPassword = form.querySelector('[type=password]');
/*
* [ Step #3 ] Handle login & logout
*
* Inherent features :
*
*  - Save credentials on login
*
*  - Delete credentials on logout
*
*/
if(getLogout()) createLogoutHandler();
else onceLoggedIn(() => {
GM.setValue('username', formUsername.value);
GM.setValue('password', formPassword.value);
createLogoutHandler();
});
/*
* [Step #4 ] Auto-login
*
*/
const
username = await GM.getValue('username'),
password = await GM.getValue('password');
if(username && password && !getLogout())
{
formUsername.value = username;
formPassword.value = password;
form.querySelector('[type=submit]').click();
}
});