Bypass Medium Paywall fork: do not redirect for free posts

medium.user.js

// ==UserScript==
// @name        Medium Paywall Bypass
// @namespace   Violentmonkey Scripts
// @run-at      document-start
// @match       *://*.medium.com/*
// @grant       none
// @version     2.4_3
// @inject-into content
// @updateURL   https://gist.githubusercontent.com/zzJinux/364725e7c61810719286d94e88a4e38c/raw/medium.user.js
// @downloadURL https://gist.githubusercontent.com/zzJinux/364725e7c61810719286d94e88a4e38c/raw/medium.user.js
// @website     https://freedium.cfd
// @author      Mathix420, ZhymabekRoman, zzJinux
// @description Don't forget to remove `@match` filters you don't want.
// ==/UserScript==

let isMedium=false;
for(const $meta of document.querySelectorAll('meta')){
  if($meta.getAttribute('property') == 'og:site_name' && $meta.getAttribute('content') == 'Medium'){
    isMedium=true;
    break;
  }
}
if(!isMedium) {
  return;
}


let isArticle = false;
function main() {
  let isArticle = false;
  for(const $meta of document.querySelectorAll('meta')){
    if($meta.getAttribute('property') == 'article:author'){
      isArticle=true;
      break;
    }
  }
  if(!isArticle) {
    return;
  }

  let $article = document.querySelector('article'); // Assume the first article is the main article.
  if (!$article) {
    // The content is not loaded yet. Observe changes in the root container.
    const observer = new MutationObserver(muts=>{
      $article = document.querySelector('article');
      if(!$article) {
        return;
      }
      observer.disconnect();
      redirect();
    });
    observer.observe(document.querySelector('#root'),{childList:true, subtree:true});
  } else {
    redirect();
  }
}

function redirect() {
  if (
      // Allow seeing original articles that were already redirected to freedium.
      !window.location.href.endsWith('#bypass') &&
      // Do not redirect when editing on medium.
      !window.location.href.includes("/edit?source=") &&
      // Do not redirect for free posts
      document.querySelector('article').classList.contains('meteredContent')
    ) {
    window.location.href = 'https://freedium.cfd/' + window.location.href;
  }
}

// Medium may load article pages in-place, in which case the title changes.
new MutationObserver(_=>{
  main();
}).observe(document.querySelector('title'), {childList:true,subtree:true,characterData:true});

main();