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YouTube Flag Tracker

Track changes in YouTube's experiment flags

目前为 2024-11-02 提交的版本。查看 最新版本。

  1. // ==UserScript==
  2. // @name        YouTube Flag Tracker
  3. // @namespace   Violentmonkey Scripts
  4. // @version     1.2
  5. // @description Track changes in YouTube's experiment flags
  6. // @include     http*://www.youtube.com/*
  7. // @grant       unsafeWindow
  8. // @grant       GM_setValue
  9. // @grant       GM_getValue
  10. // @run-at      document-end
  11. // ==/UserScript==
  12.  
  13. function save(key, data) {
  14.  
  15.     if (!Object.keys(data).length) {
  16.         return;
  17.     }
  18.  
  19.     if (key === "changes") {
  20.         const changes = GM_getValue("changes", []);
  21.         changes.unshift(data);
  22.         data = changes;
  23.     }
  24.  
  25.     GM_setValue(key, data);
  26. }
  27.  
  28. // Comparison Cases: Boolean, Integer, Float, String, List.
  29. function isEqual(a, b) {
  30.  
  31.     // Primitive Types: Boolean, Integer, Float, String
  32.     if (a === b) {
  33.         return true;
  34.     }
  35.  
  36.     // Array Type
  37.     if (Array.isArray(a) && Array.isArray(b)) {
  38.         return (
  39.             a.length === b.length &&
  40.             JSON.stringify(a) === JSON.stringify(b)
  41.         );
  42.     }
  43.  
  44.     console.log("not equal");
  45.     return false; // Other Type
  46. }
  47.  
  48. function diffChecker(prev = {}, curr = {}) {
  49.  
  50.     let changes = {};
  51.  
  52.     const allKeys = new Set([...Object.keys(prev), ...Object.keys(curr)]);
  53.  
  54.     allKeys.forEach(key => {
  55.  
  56.         const prevVal = prev[key];
  57.         const currVal = curr[key];
  58.  
  59.         if (prevVal === undefined) {
  60.             changes[key] = { type: "added", value: currVal };
  61.         }
  62.  
  63.         else if (currVal === undefined) {
  64.             changes[key] = { type: "removed" };
  65.         }
  66.  
  67.         else if (!isEqual(prevVal, currVal)) {
  68.             changes[key] = { type: "modified", value: currVal };
  69.         }
  70.     });
  71.  
  72.     return changes;
  73. }
  74.  
  75. function updateStorage(curr) {
  76.  
  77.     const prev = GM_getValue("flags", {});
  78.     const changes = diffChecker(prev, curr);
  79.  
  80.     save("changes", changes);
  81.     save("flags", curr);
  82. }
  83.  
  84. function observeFlags() {
  85.  
  86.     const observer = new MutationObserver(() => {
  87.  
  88.         const flags = unsafeWindow.yt?.config_?.EXPERIMENT_FLAGS;
  89.  
  90.         if (flags) {
  91.             observer.disconnect();
  92.             console.log(flags);
  93.             updateStorage(flags);
  94.         }
  95.     });
  96.  
  97.     observer.observe(document.body, { childList: true, subtree: true });
  98. }
  99.  
  100.  
  101. observeFlags();