PoE2DB English Language Enforcer

Enforces English content on the PoE2DB website via URL.

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 or Violentmonkey 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         PoE2DB English Language Enforcer
// @namespace    https://greasyfork.org/users/rafagale
// @version      1.0.1
// @description  Enforces English content on the PoE2DB website via URL.
// @author       rafagale
// @match        https://poe2db.tw/*
// @license      MIT
// @grant        none
// @run-at       document-start
// ==/UserScript==


(function () {
    'use strict';

    const DEFAULT_LANGUAGE_PREFIX = 'us';

    const getSegments = (url) => url.pathname.split('/').filter(Boolean);
    const hasLanguagePrefix = (segments) => /^[a-z]{2}$/i.test(segments[0]);

    const enforceLanguagePrefix = () => {
        const url = new URL(window.location.href);
        const segments = getSegments(url);

        if (hasLanguagePrefix(segments)) {
            if (segments[0] === DEFAULT_LANGUAGE_PREFIX) return;
            segments[0] = DEFAULT_LANGUAGE_PREFIX;
        } else {
            segments.unshift(DEFAULT_LANGUAGE_PREFIX);
        }

        const newPathname = `/${segments.join('/')}`;
        if (url.pathname !== newPathname) {
            url.pathname = newPathname;
            window.location.replace(url.toString());
        }
    };

    enforceLanguagePrefix();
})();