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Redirect Reddit URLs

Redirect any Reddit domain that isn't "old" to old.reddit.com while keeping the rest of the URL. Remove string after the last / in old.reddit.com URLs. Integrate shouldExcludePath function.

You will need to install an extension such as Tampermonkey, Greasemonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install an extension such as Tampermonkey or Violentmonkey to install this script.

You will need to install an extension such as Tampermonkey or Userscripts to install this script.

You will need to install an extension such as Tampermonkey to install this script.

You will need to install a user script manager extension to install this script.

(I already have a user script manager, let me install it!)

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install an extension such as Stylus to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

You will need to install a user style manager extension to install this style.

(I already have a user style manager, let me install it!)

// ==UserScript==
// @name         Redirect Reddit URLs
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  Redirect any Reddit domain that isn't "old" to old.reddit.com while keeping the rest of the URL. Remove string after the last / in old.reddit.com URLs. Integrate shouldExcludePath function.
// @author       You
// @match        *://*.reddit.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function removeDotsFromPath() {
        const host = window.location.host;
        const path = window.location.pathname;
        if (host === "old.reddit.com") {
            if (path.includes("/domain/")) {
                const newPath = path.replace(/\.[a-z]+$/, '');
                const newUrl = `https://${host}${newPath}${window.location.search}${window.location.hash}`;
                if (newUrl !== window.location.href) {
                    window.location.replace(newUrl);
                }
            } else if (path.includes(".")) {
                const newPath = path.replace(/\.[a-z]+$/, '');
                const newUrl = `https://${host}${newPath}${window.location.search}${window.location.hash}`;
                if (newUrl !== window.location.href) {
                    window.location.replace(newUrl);
                }
            }
        }
    }

    function shouldExcludePath(path) {
        // Define paths to exclude
        const excludePaths = ['/poll/', '/gallery/', '/media'];

        // Check if the path contains any excluded substring and is not preceded by "/r"
        return excludePaths.some(exclude => path.includes(exclude) && !path.includes('/r' + exclude));
    }

    function redirectNonOldDomains() {
        const host = window.location.host;
        const path = window.location.pathname;
        const nonOldDomainRegex = /^(?!old\.)/;
        if (nonOldDomainRegex.test(host) && !shouldExcludePath(path)) {
            window.location.href = 'https://old.reddit.com' + window.location.pathname + window.location.search + window.location.hash;
        }
    }

    function redirectToOldRedditIfNotOnOldOrRedditOrTwoLetterDomain() {
        const host = window.location.host;
        const path = window.location.pathname;

        if (
            host === "www.reddit.com" &&
            !shouldExcludePath(path)
        ) {
            redirectToOldReddit();
        } else if (host === "old.reddit.com" && shouldExcludePath(path)) {
            const newUrl = `https://www.reddit.com${path}${window.location.search}${window.location.hash}`;
            window.location.replace(newUrl);
        }
    }

    function redirectToOldReddit() {
        window.location.href = 'https://old.reddit.com' + window.location.pathname + window.location.search + window.location.hash;
    }

    // Call the functions
    removeDotsFromPath();
    redirectNonOldDomains();
    redirectToOldRedditIfNotOnOldOrRedditOrTwoLetterDomain();
})();