Tampermonkey old reddit redirect

redirect.js

// ==UserScript==
// @name         Reddit Old Layout
// @namespace    9bf36c681d35d52913b3bda74ddf6127318ed7b0
// @version      0.1
// @description  Forces usage of the old reddit version
// @author       Tom Watson
// @match        https://reddit.com/*
// @match        https://www.reddit.com/*
// @match        https://np.reddit.com/*
// @match        https://amp.reddit.com/*
// @match        https://i.reddit.com/*
// @grant        none
// @run-at       document-start
// ==/UserScript==
const excludedPaths = [
    /^\/media/,
    /^\/poll/,
    /^\/rpan/,
    /^\/settings/,
    /^\/topics/,
    /^\/community-points/,
    /^\/r\/[a-zA-Z0-9_]+\/s\/.*/, // eg https://reddit.com/r/comics/s/TjDGhcl22d
    /^\/appeals?/,
    /\/r\/.*\/s\//,
];

const oldReddit = "https://old.reddit.com";
const imageUrlHostnames = ["preview.redd.it", "i.redd.it"];

(function () {
    'use strict';

    console.log("Handling the url " + window.location.href);
    const url = new URL(window.location.href);
    if (url.hostname === "old.reddit.com"){
        console.log("Was already on old reddit. Doing nothing.");
        return;
    }

    for (const hostname of imageUrlHostnames) {
        if (url.hostname === hostname) {
            console.log("Hostname matched " + hostname + ". Skipping");
            return;
        }
    }
    for (const path of excludedPaths) {
        if (path.test(url.pathname)){
            console.log(`path ${url.pathname} matched the excluded path ${path}`);
            return;
        }
    }

    if (url.pathname.indexOf("/gallery") === 0) {
        const gallery_redirect = oldReddit + "/comments" + url.pathname.slice("/gallery".length);
        console.log(`Redirecting to ${gallery_redirect}`);
        document.location.replace(gallery_redirect)
    }else{
        const redirect = oldReddit + url.pathname + url.search + url.hash;
        console.log(`Redirecting to oldreddit ${redirect}`);
        document.location.replace(redirect);
    }

})();