// ==UserScript==
// @name         Old Reddit Redirect!
// @version      1
// @description  Converts reddit.com links to old.reddit.com links
// @author       idk
// @match        *://*.reddit.com/*
// @exclude      *://www.reddit.com/poll/*
// @grant        none
// @run-at       document-start
// @license      MIT
// @namespace https://greasyfork.org/users/1101475
// ==/UserScript==
// Used for optimization when there's too many links on a page
const use_optimization = true;
// Number of links on the page before using optimization
const opti_threshold = 250;
const opti_dataname = 'orp40897';
// Time between each cleanup (in milliseconds)
const clean_interval = 1000;
const log = (msg) => console.log(`[old-reddit-please] ${msg}`);
log("Loaded");
// Text a URL to make sure it's a Reddit domain
function test(url) {
return !!url.match(/^(|http(s?):\/\/)(|www.)reddit.com(\/.*|$)/gim);
}
/**
* Pass a link and return the new one if it's a reddit link.
* Anything else and you'll get the original input back.
**/
function updateLink(url) {
try {
var target = new URL(url);
if (target.hostname == 'www.reddit.com') {
target.hostname = 'old.reddit.com';
return target.href;
} else return url;
} catch(e) {
return url;
}
}
// Main fuction
(() => {
let ready = true;
let last_count = 0;
let selector = 'a';
const update_links = () => {
if (ready) {
ready = false;
if (use_optimization && last_count >= opti_threshold) {
selector = `a:not([data-${opti_dataname}])`;
}
const links = document.querySelectorAll(selector);
last_count = links.length;
if (last_count > 0) log('Updated ' + links.length + ' links');
for (const link of links) {
// Don't clean links that have already been cleaned
// This is to prevent slowing down pages when there are a lot of links
// For example, endless scroll on reddit
if (use_optimization && selector !== 'a') {
link.setAttribute(`data-${opti_dataname}`, '1');
}
try {
// Make sure it's a valid URL
new URL(link.href);
// Run the cleaner
const updated = updateLink(link.href);
if(updated !== link.href) link.setAttribute('href', updated);
} catch (error) {
// Ignore invalid URLs
}
}
setTimeout(() => (ready = true), clean_interval);
}
};
const MutationObserver = window.MutationObserver || window.WebKitMutationObserver || window.MozMutationObserver;
const observer = new MutationObserver(update_links);
observer.observe(document, { childList: true, subtree: true });
window.addEventListener('load', () => setInterval(update_links, clean_interval));
update_links();
})();
if(test(window.location.href)){
window.location.assign(updateLink(window.location.href));
}