X.com to Twitter.com Redirect

Redirects X.com URLs to Twitter.com and ensures the 'mx=1' parameter is present.
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// ==UserScript==
// @name         X.com to Twitter.com Redirect
// @name:zh-CN   重定向X.com到Twitter.com
// @namespace    NTE
// @version      1.2
// @description  Redirects X.com URLs to Twitter.com and ensures the 'mx=1' parameter is present.
// @description:zh-cn 重定向X.com到Twitter.com并确保后面有“mx=1"参数
// @author       NTE
// @match        *://x.com/*
// @match        *://twitter.com/*
// @match        *://mobile.x.com/*
// @match        *://mobile.twitter.com/*
// @match        *://pro.x.com/*
// @match        *://pro.twitter.com/*
// @exclude      *://x.com/i/tweetdeck*
// @grant        none
// @license      AGPL-3.0-or-later
// ==/UserScript==

(function() {
    'use strict';

    console.log('Tampermonkey script is running.');

    const currentUrl = new URL(window.location.href);
    let newUrl = new URL(window.location.href); // Start with a copy of the current URL

    let shouldRedirect = false;

    // Case 1: If the hostname ends with x.com
    if (currentUrl.hostname.endsWith('x.com')) {
        // Replace '.x.com' with '.twitter.com' to preserve subdomains
        // For example, mobile.x.com becomes mobile.twitter.com
        // x.com becomes twitter.com
        newUrl.hostname = currentUrl.hostname.replace(/\.x\.com$/, '.twitter.com');

        newUrl.searchParams.set('mx', '1');

        // Handle the root path redirection specifically for x.com
        if (currentUrl.pathname === '/') {
            newUrl.pathname = ''; // Remove the trailing slash for the root path
        }
        shouldRedirect = true;
        console.log(`Detected ${currentUrl.hostname}, preparing to redirect to ${newUrl.hostname}.`);
    }
    // Case 2: If the hostname ends with twitter.com and 'mx' parameter is missing
    else if (currentUrl.hostname.endsWith('twitter.com') && !currentUrl.searchParams.has('mx')) {
        // No hostname change needed here, just add the parameter
        newUrl.searchParams.set('mx', '1');
        shouldRedirect = true;
        console.log('Detected twitter.com without mx=1, preparing to add parameter.');
    }

    // Perform redirection if needed
    if (shouldRedirect && newUrl.toString() !== currentUrl.toString()) {
        console.log('Redirecting from:', currentUrl.toString());
        console.log('Redirecting to:', newUrl.toString());
        window.location.replace(newUrl.toString());
    } else {
        console.log('No redirection needed for:', currentUrl.toString());
    }

})();