// ==UserScript==
// @name         Privacy Redirector
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Redirects sites to privacy-focused frontends
// @author       baalajimaestro
// @match        https://youtube.com/*
// @match        https://youtu.be/*
// @match        https://www.youtube.com/*
// @match        https://www.youtu.be/*
// @match        https://twitter.com/*
// @match        https://x.com/*
// @match        https://www.x.com/*
// @match        https://www.twitter.com/*
// @match        https://stackoverflow.com/*
// @match        https://www.stackoverflow.com/*
// @match        https://reddit.com/*
// @match        https://www.reddit.com/*
// @match        https://old.reddit.com/*
// @match        https://new.reddit.com/*
// @match        https://quora.com/*
// @match        https://www.quora.com/*
// @icon         https://baalajimaestro.me/favicon.ico
// @grant        none
// ==/UserScript==

// dont touch iframes
if (window.top != window.self) {
    return;
}

// our document location
let link = document.location.href;

// regexes
const re_yt =
  /^(?:(?:https|http):\/\/)?(?:www\.)?(?:youtube\.com|youtu\.be).*(?<=\/|v\/|u\/|embed\/|shorts\/|watch\?v=)(?<!\/user\/)(?<id>[\w\-]{11})(?=\?|&|$)/;
const re_twt =
  /^(?:https?:\/\/(?:twitter|x)\.com)(?<url>\/(?:#!\/)?(\w+)\/status(es)?\/(\d+))/;
const re_soflow =
  /^https?:\/\/stackoverflow\.com(?<url>\/questions\/\d+\/[^\/\s]*)/;
const re_reddit =
  /^https?:\/\/(?:www\.)?(?:old\.)?reddit\.com(?<url>\/r\/\w+\/comments\/\w+\/[^/?#]+)/;
const re_quora = /https:\/\/www\.quora\.com(?<url>\/.*)/;

// redirectors
const inv = "//invidious.baalajimaestro.me";
const nitter = "//nitter.net";
const oflow = "//overflow.baalajimaestro.me";
const lr = "//libreddit.baalajimaestro.me";
const qtr = "//quetre.baalajimaestro.me";

// handle dynamic pages
const observer = new MutationObserver(function (mutations) {
  mutations.forEach(function (mutation) {
    if (link != document.location.href) {
      link = document.location.href;
      handler();
    }
  });
});

observer.observe(document.body, {
  childList: true,
  subtree: true,
});

//universal handler to handle all sites
function handler() {
  if (re_yt.test(link)) {
    window.location.replace(
      inv + "/watch?v=" + window.location.href.match(re_yt).groups.id,
    );
  } else if (re_twt.test(link)) {
    window.location.replace(
      nitter + window.location.href.match(re_twt).groups.url,
    );
  } else if (re_reddit.test(link)) {
    window.location.replace(
      lr + window.location.href.match(re_reddit).groups.url,
    );
  } else if (re_soflow.test(link)) {
    window.location.replace(
      oflow + window.location.href.match(re_soflow).groups.url,
    );
  } else if (re_quora.test(link)) {
    window.location.replace(
      qtr + window.location.href.match(re_quora).groups.url,
    );
  }
}

handler();