Plex Media Server beta update link fixer

Plex Media Server has been corrupting update download links for users on the beta channel on linux. This user-script "turns up the geek", and fixes the links to point to the correct address.

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       Plex Media Server beta update link fixer
// @namespace  http://mathemaniac.org/
// @version    1.0.1
// @description  Plex Media Server has been corrupting update download links for users on the beta channel on linux. This user-script "turns up the geek", and fixes the links to point to the correct address.
// @match        https://app.plex.tv/desktop*
// @copyright  2022, Sebastian Paaske Tørholm
// @require    https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js
// @grant none
// ==/UserScript==

// See https://forums.plex.tv/t/server-download-link-hiding-makes-it-useless/791780 for context.

/* jshint -W097 */
/* eslint-env jquery */
'use strict';

// Automatically fix broken links back into correct ones - and hide the link in the Shadow DOM, so the token isn't removed again.
function fixLink(elm) {
    let link = elm.href.replace('xxxxxxxxxxxxxxxxxxxx', localStorage.myPlexAccessToken);
    let shadowDOM = elm.parentNode.attachShadow({ mode: 'closed' });
    elm.remove();
    elm.href = link;

    let styleSheets = document.querySelectorAll('link[rel="stylesheet"]');
    for (let ss of styleSheets) {
        shadowDOM.appendChild(ss.cloneNode());
    }

    shadowDOM.appendChild(elm);
}

$(function () {
    var MutationObserver = window.MutationObserver || window.WebKitMutationObserver;
    var config = { childList: true, characterData: false, attributes: true, subtree: true };
    var observer = new MutationObserver( function (mutations) {
        mutations.forEach( function (mutation) {
            if (mutation.type == 'childList') {
                for (let m of mutation.addedNodes) {
                    $('a[href^="https://plex.tv/downloads/latest"]', m).each(function () { fixLink(this) });
                }
            } else if (mutation.type == 'attributes') {
                if (mutation.attributeName == 'href' && $(mutation.target).attr('href').match(/^https:\/\/plex\.tv\/downloads\/latest/)) {
                    fixLink(mutation.target);
                }
            }
        });
    });

    observer.observe(document.querySelector('#plex'), config);

    $('a[href^="https://plex.tv/downloads/latest"]').each( function () {
        fixLink(this);
    });
});