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Make AV number, not BV code

Make AV number, not BV code. F**k you BiliBili

  1. // ==UserScript==
  2. // @name              Make AV number, not BV code
  3. // @name:en           Make AV number, not BV code
  4. // @name:zh-CN        要AV号，不要BV码
  5. // @namespace         https://pilipili.com/bv10492
  6. // @version           0.1.5
  7. // @description       Make AV number, not BV code. F**k you BiliBili
  8. // @description:en    Make AV number, not BV code. F**k you BiliBili
  9. // @description:zh-CN 要AV号，不要BV码，屑站飞了
  10. // @author            jk1551
  11. // @require           https://unpkg.com/ajax-hook@2.0.0/dist/ajaxhook.min.js
  12. // @nocompat          Chrome
  13. // @nocompat          Firefox
  14. // @nocompat          Opera
  15. // @nocompat          Edge
  16. // @match             https://www.bilibili.com/video/*
  17. // @match             http://www.bilibili.com/video/*
  18. // @match             https://www.bilibili.com/bangumi/play/*
  19. // @match             http://www.bilibili.com/bangumi/play/*
  20. // @match             https://acg.tv/*
  21. // @match             http://acg.tv/*
  22. // @match             https://b23.tv/*
  23. // @match             http://b23.tv/*
  24. // @grant             none
  25. // ==/UserScript==
  26.  
  27. /* jshint esversion: 6 */
  28.  
  29. const CONFIG = {
  30.     autoJump: false
  31. };
  32.  
  33. // GM代码构思来自 https://greasyfork.org/zh-CN/scripts/398526-give-me-av-not-bv
  34.  
  35. (() => {
  36.     if (typeof BigInt !== "function") {
  37.         console.warn("Your browser does not support BigInt. AV/BV conversion is disabled.");
  38.         return;
  39.     }
  40.  
  41.     const bv2av = (() => {
  42.         // https://www.zhihu.com/question/381784377/answer/1099438784
  43.         const table = "fZodR9XQDSUm21yCkr6zBqiveYah8bt4xsWpHnJE7jL5VG3guMTKNPAwcF";
  44.         const tr = Object.create(null);
  45.  
  46.         for (let i = 0; i < 58; i += 1) {
  47.             tr[table[i]] = BigInt(i);
  48.         }
  49.  
  50.         const s = [11, 10, 3, 8, 4, 6/* ←今ここ */, 2, 9, 5, 7/* 最大値 */];
  51.         // 不用BigInt的话后面做位运算就爆炸了
  52.         const xor = BigInt(177451812);
  53.         const add = BigInt(8728348608);
  54.         const pow58 = [];
  55.  
  56.         // 58进制下2^32的最大位数（=6），也就是在此之前变动的最多位数，也就是s表的长度
  57.         // 以后用随机av号，超过27个二进制位的时候，就可以把上面的封印解除啦
  58.         const highestDigit = 6;
  59.  
  60.         for (let i = 0; i < highestDigit; i += 1) {
  61.             pow58.push(BigInt(Math.pow(58, i)));
  62.         }
  63.  
  64.         /**
  65.          * @param s {string}
  66.          */
  67.         function list(s) {
  68.             return s.split("");
  69.         }
  70.  
  71.         /**
  72.          * @param x {string} BV string; including the beginning "BV" (e.g. "BV17x411w7KC")
  73.          */
  74.         function dec(x) {
  75.             let r = BigInt(0);
  76.  
  77.             for (let i = 0; i < highestDigit; i += 1) {
  78.                 r += tr[x[s[i]]] * pow58[i];
  79.             }
  80.  
  81.             return Number((r - add) ^ xor);
  82.         }
  83.  
  84.         /**
  85.          * @param x {number} Exsiting AV number
  86.          */
  87.         function enc(x) {
  88.             x = BigInt(x);
  89.             x = (x ^ xor) + add;
  90.  
  91.             const r = list("BV1  4 1 7  ");
  92.  
  93.             for (let i = 0; i < highestDigit; i += 1) {
  94.                 const index = (x / pow58[i]) % BigInt(58);
  95.                 r[s[i]] = table[index];
  96.             }
  97.  
  98.             return r.join("");
  99.         }
  100.  
  101.         return {
  102.             enc: enc,
  103.             dec: dec
  104.         };
  105.     })();
  106.  
  107.     /**
  108.      * @param avNumber {number | string | bigint}
  109.      */
  110.     function getAvUrl(avNumber) {
  111.         return "/video/av" + avNumber.toString();
  112.     }
  113.  
  114.     /**
  115.      * @param avNumber {number | string | bigint}
  116.      */
  117.     function getAvText(avNumber) {
  118.         return "av" + avNumber.toString();
  119.     }
  120.  
  121.     /**
  122.      * @param avNumber {number | string}
  123.      */
  124.     function appendOrUpdateAvNumberLink(avNumber) {
  125.         const avInfoLabels = document.getElementsByClassName("video-data");
  126.         // 第一行：分区和日期
  127.         const infoBlock1 = avInfoLabels[0];
  128.  
  129.         // 投稿日期span
  130.         // 直接塞到和infoBlock1同级会导致谜之排版错误，只好借壳咯（其实是Vue的锅
  131.         const info1 = infoBlock1.children[1];
  132.  
  133.         // 我放弃创建新的元素了……干脆直接黑魔法换个a
  134.         const avreg = /av\d+/;
  135.         const oldContent = info1.textContent;
  136.         
  137.         if (!avreg.test(oldContent)) {
  138.             const avUrl = getAvUrl(avNumber);
  139.             const avText = getAvText(avNumber);
  140.             info1.outerHTML = `<a href="${avUrl}" title="${avText}" target="_blank">${oldContent}\u00a0${avText}</a>`;
  141.             // 以下两行本来是调整样式，让其显示跟原来差不多的，但是Vue似乎劫持了样式设定，所以没出效果也就算了
  142.             info1.style.color = "#999";
  143.             info1.style.height = "16px";
  144.         }
  145.     }
  146.  
  147.     /**
  148.      * @param avNumber {number | string}
  149.      */
  150.     function modifyBangumiAvNumberLink(avNumber) {
  151.         const pubs = document.getElementsByClassName("pub-wrapper");
  152.  
  153.         if (!pubs || pubs.length === 0) {
  154.             return;
  155.         }
  156.  
  157.         const avLink = pubs[0].querySelector("a.av-link");
  158.  
  159.         if (!avLink) {
  160.             return;
  161.         }
  162.  
  163.         avLink.textContent = getAvText(avNumber);
  164.         avLink.href = getAvUrl(avNumber);
  165.     }
  166.  
  167.     (() => {
  168.         const bvUrlRE = /\/video\/(BV[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]+)/;
  169.         const bvmatch = bvUrlRE.exec(window.location.href);
  170.  
  171.         if (bvmatch) {
  172.             console.log("F**k You BV Number!");
  173.  
  174.             if (CONFIG.autoJump) {
  175.                 const bvstr = bvmatch[1];
  176.                 const avNumber = bv2av.dec(bvstr);
  177.                 const url = getAvUrl(avNumber);
  178.                 window.location.href = url;
  179.             }
  180.         }
  181.     })();
  182.  
  183.     let isContentRefreshed = false;
  184.     let avNumber = Number.NaN;
  185.     let pageType = Number.NaN;
  186.  
  187.     const PageType = {
  188.         video: 0,
  189.         bangumi: 1
  190.     };
  191.  
  192.     // TODO: 处理 HTML5 History 相关
  193.  
  194.     const bvidRE = /bvid=(BV[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]+)/;
  195.     const aidRE = /aid=(\d+)/;
  196.     const avidRE = /avid=(\d+)/;
  197.  
  198.     ah.proxy({
  199.         //请求发起前进入
  200.         onRequest: (config, handler) => {
  201.             let match;
  202.  
  203.             if (config.url.indexOf("api.bilibili.com/x/web-interface/view") > 0) {
  204.                 match = bvidRE.exec(config.url);
  205.  
  206.                 if (match) {
  207.                     // https://api.bilibili.com/x/web-interface/view?cid=167028524&bvid=BV1TE411A7VJ
  208.                     avNumber = bv2av.dec(match[1]);
  209.                     isContentRefreshed = true;
  210.                     pageType = PageType.video;
  211.                 } else {
  212.                     match = aidRE.exec(config.url);
  213.  
  214.                     if (match) {
  215.                         // https://api.bilibili.com/x/web-interface/view?cid=167028524&aid=97836354
  216.                         avNumber = Number.parseInt(match[1]);
  217.                         isContentRefreshed = true;
  218.                         pageType = PageType.video;
  219.                     }
  220.                 }
  221.             } else if (config.url.indexOf("api.bilibili.com/pgc/player/web/playurl") > 0) {
  222.                 match = avidRE.exec(config.url);
  223.  
  224.                 if (match) {
  225.                     // https://api.bilibili.com/pgc/player/web/playurl?cid=122062626&qn=0&type=&otype=json&avid=70455036&ep_id=286039&fourk=1&fnver=0&fnval=16&session=xxx
  226.                     avNumber = Number.parseInt(match[1]);
  227.                     isContentRefreshed = true;
  228.                     pageType = PageType.bangumi;
  229.                 }
  230.             }
  231.  
  232.             handler.next(config);
  233.         },
  234.  
  235.         //请求成功后进入
  236.         onResponse: (response, handler) => {
  237.             if (response.config.url.indexOf("api.bilibili.com") > 0) {
  238.                 if (isContentRefreshed) {
  239.                     switch (pageType) {
  240.                         case PageType.video: {
  241.                             if (!Number.isNaN(avNumber)) {
  242.                                 setTimeout(() => appendOrUpdateAvNumberLink(avNumber));
  243.                             }
  244.  
  245.                             break;
  246.                         }
  247.                         case PageType.bangumi: {
  248.                             if (!Number.isNaN(avNumber)) {
  249.                                 setTimeout(() => modifyBangumiAvNumberLink(avNumber));
  250.                             }
  251.  
  252.                             break;
  253.                         }
  254.                         default:
  255.                             break;
  256.                     }
  257.                 }
  258.             }
  259.  
  260.             handler.next(response);
  261.         }
  262.     });
  263. })();