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Base64 link decoder

Replaces any base64 encoded link in a <code> block as that is the normal format for links on the instance

  1. // ==UserScript==
  2. // @name        Base64 link decoder
  3. // @namespace   Violentmonkey Scripts
  4. // @match       *://lemmy.dbzer0.com/*
  5. // @grant       none
  6. // @version     1.0
  7. // @license     MIT
  8. // @author      sweepline
  9. // @description Replaces any base64 encoded link in a <code> block as that is the normal format for links on the instance
  10. // ==/UserScript==
  11.  
  12. function decodeURLS() {
  13.     while (true) {
  14.     // We must do FIRST_ORDERED_NODE_TYPE runs many times as the iterator dies in NODE_ITERATOR_TYPE if the dom changes.
  15.     let xpath = document.evaluate("//code[contains(text(),'aHR0c')]", document, null, XPathResult.FIRST_ORDERED_NODE_TYPE, null);
  16.     if (xpath.singleNodeValue == null) {
  17.       break;
  18.     }
  19.     const decoded = atob(xpath.singleNodeValue.innerText)
  20.     xpath.singleNodeValue.innerHTML = `<a href="${decoded}">${decoded}</a>`;
  21.   }
  22. }
  23.  
  24. // First load replace
  25. window.addEventListener('load', decodeURLS, {once: true, capture: false});
  26.  
  27. // For listening on navigation
  28. const observeUrlChange = () => {
  29.   let oldHref = document.location.href;
  30.   const body = document.querySelector("body");
  31.   const observer = new MutationObserver(mutations => {
  32.     if (oldHref !== document.location.href) {
  33.       oldHref = document.location.href;
  34.       setTimeout(decodeURLS, 300);
  35.     }
  36.   });
  37.   observer.observe(body, { childList: true, subtree: true });
  38. };
  39.  
  40. window.onload = observeUrlChange;