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Qiita Advent Calendar Feed Export

export subscription list of Qiita Advent Calendar as OPML

  1. // ==UserScript==
  2. // @name         Qiita Advent Calendar Feed Export
  3. // @namespace    https://fuwa.dev
  4. // @version      2024-11-30
  5. // @description  export subscription list of Qiita Advent Calendar as OPML
  6. // @author       fuwa2003
  7. // @match        https://qiita.com/advent-calendar/*/feed
  8. // @icon         https://www.google.com/s2/favicons?sz=64&domain=qiita.com
  9. // @grant        none
  10. // ==/UserScript==
  11.  
  12. (function() {
  13.   'use strict';
  14.  
  15.   // https://stackoverflow.com/questions/3665115/how-to-create-a-file-in-memory-for-user-to-download-but-not-through-server
  16.   function download(filename, text) {
  17.     const element = document.createElement('a');
  18.     element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
  19.     element.setAttribute('download', filename);
  20.  
  21.     element.style.display = 'none';
  22.     document.body.appendChild(element);
  23.  
  24.     element.click();
  25.  
  26.     document.body.removeChild(element);
  27.   }
  28.  
  29.   function run() {
  30.  
  31.     const entries = Array.from(document.querySelectorAll('main > div > section ol li > div a'))
  32.       .map((a) => ({
  33.         text: a.innerText + " Advent Calendar - Qiita",
  34.         href: a.href,
  35.       }));
  36.  
  37.     const entries_text = entries.map((entry) => (
  38.           `  <outline title="${entry.text}" text="${entry.text}" type="rss" xmlUrl="${entry.href}/feed" />`
  39.     )).join('\n');
  40.  
  41.     const opml = `
  42. <?xml version="1.0" encoding="UTF-8"?>
  43. <opml version="1.0">
  44.   <head>
  45.     <title>Qiita Advent Calendar subscriptions</title>
  46.   </head>
  47.   <body>
  48. ${entries_text}
  49.   </body>
  50. </opml>
  51.     `.trim();
  52.  
  53.     // download file
  54.     download('qiita.opml', opml);
  55.   }
  56.  
  57.   const btn = document.createElement('button');
  58.   btn.innerText = 'Export OPML';
  59.   btn.addEventListener('click', run);
  60.   document.querySelector('main > div > section').prepend(btn);
  61.   console.log(btn);
  62.  
  63.   // when btn removed, add again
  64.   btn.addEventListener('DOMNodeRemoved', (e) => {
  65.     console.log('removed', e);
  66.     setTimeout(() => {
  67.       document.querySelector('main > div > section').prepend(btn);
  68.     }, 100);
  69.   });
  70.  
  71. })();