mod.reddit.com revived

Revive mod.reddit.com
Ask a question, post a review, or report the script.
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// ==UserScript==
// @name         mod.reddit.com revived
// @namespace    https://greasyfork.org/en/users/1574555-littux
// @version      1.2
// @description  Revive mod.reddit.com
// @author       littux
// @match        https://mod-reddit-com.netlify.app/*
// @match        http://localhost:44444/*
// @match        https://*.reddit.com/mail/*
// @connect      www.reddit.com
// @connect      sh.reddit.com
// @connect      gql-fed.reddit.com
// @icon         https://www.redditstatic.com/modmail/favicon/android-icon-192x192.png
// @grant        GM_getValue
// @grant        GM_setValue
// @grant        GM_xmlhttpRequest
// @grant        GM_cookie
// @run-at       document-start
// @license      MIT
// ==/UserScript==

const useLocalhost = false;

(async function() {
    if (location.hostname.endsWith("reddit.com")) {
        window.stop();
        location.replace((useLocalhost ? "http://localhost:44444" : "https://mod-reddit-com.netlify.app") + location.pathname + location.search + location.hash);
        return;
    };

    document.addEventListener('DOMContentLoaded', async () => {
        const gmFetch = (options) => {
            return new Promise((resolve, reject) => {
                GM_xmlhttpRequest({
                    ...options,
                    onload: (res) => resolve(res),
                    onerror: (err) => reject(err)
                });
            });
        }

        unsafeWindow.gmFetch = gmFetch;

        const getExternalCookie = (name, url) => {
            return new Promise((resolve, reject) => {
                if (typeof window.GM_cookie !== 'undefined') {
                    GM_cookie.list({ name, url }, (cookies, error) => {
                        if (error) reject(error);
                        else resolve(cookies.length > 0 ? cookies[0].value : null);
                    });
                } else {
                    reject("GM_cookie not supported. Ensure you are using Tampermonkey.");
                }
            });
        };

        const getToken = async () => {
            const loid = await getExternalCookie("loid", "https://www.reddit.com/mail/");
            if (!loid) {
                console.error("Not logged into Reddit? LOID missing.");
                return null;
            }

            const tokenKey = `rAPI:accessToken~${loid}`;
            const expiryKey = `rAPI:accessTokenExpiry~${loid}`;

            const cachedToken = GM_getValue(tokenKey);
            const cachedExpiry = GM_getValue(expiryKey);
            if (cachedToken && cachedExpiry > Date.now()) return cachedToken;

            await gmFetch({
                method: "HEAD",
                url: "https://sh.reddit.com/404",
                withCredentials: true
            });

            const csrf = await getExternalCookie("csrf_token", "https://sh.reddit.com/mail/");

            try {
                const response = await gmFetch({
                    method: "POST",
                    url: "https://www.reddit.com/svc/shreddit/token",
                    withCredentials: true,
                    headers: {
                        "Content-Type": "application/json",
                        "Origin": "https://www.reddit.com",
                        "Referer": "https://www.reddit.com/"
                    },
                    data: JSON.stringify({ csrf_token: csrf })
                });

                if (response.status === 200) {
                    const data = JSON.parse(response.responseText);
                    GM_setValue(tokenKey, data.token);
                    GM_setValue(expiryKey, data.expires);
                    return data.token;
                }
            } catch (e) {
                console.error("Token fetch failed:", e);
            }
            return null;
        };

        console.log("rAPI access token ready.");

        const event = new CustomEvent('rAPI-accessToken-ready', { detail: { accessToken: await getToken() }});
        window.dispatchEvent(event);
    });
})();