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bv2av

Change bv to av

当前为 2024-02-06 提交的版本，查看 最新版本。

// ==UserScript==
// @name         bv2av
// @namespace    http://tampermonkey.net/
// @version      1.15
// @description  Change bv to av
// @author       ouuan
// @license      MIT
// @match        *://*.bilibili.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // https://socialsisteryi.github.io/bilibili-API-collect/docs/misc/bvid_desc.html#bv-av%E7%AE%97%E6%B3%95

    const XOR_CODE = 23442827791579n;
    const MASK_CODE = 2251799813685247n;
    const MAX_AID = 1n << 51n;
    const BASE = 58n;

    const data = 'FcwAPNKTMug3GV5Lj7EJnHpWsx4tb8haYeviqBz6rkCy12mUSDQX9RdoZf';

    function dec(bvid) {
        const bvidArr = Array.from(bvid);
        [bvidArr[3], bvidArr[9]] = [bvidArr[9], bvidArr[3]];
        [bvidArr[4], bvidArr[7]] = [bvidArr[7], bvidArr[4]];
        bvidArr.splice(0, 3);
        const tmp = bvidArr.reduce((pre, bvidChar) => pre * BASE + BigInt(data.indexOf(bvidChar)), 0n);
        return `av${Number((tmp & MASK_CODE) ^ XOR_CODE)}`;
    }

    function bv2av(x) {
        if (!x.match("www.bilibili.com")) return x;
        if (x.includes('/watchlater/')) return x;
        const bvs = x.match(/[bB][vV][fZodR9XQDSUm21yCkr6zBqiveYah8bt4xsWpHnJE7jL5VG3guMTKNPAwcF]{10}/g);
        if (bvs) {
            for (const bv of bvs) {
                x = x.replace(bv, dec(bv));
            }
        }
        if (x.match(/bilibili.com\/av\d+/)) {
            x = x.replace(/(av\d+)/, 'video/$1')
        }
        return x;
    }

    setInterval(function() {
        const url = window.location.href;
        const newUrl = bv2av(url);
        if (url != newUrl) {
            window.history.pushState(null, null, newUrl);
        }
    }, 2000);

    setInterval(function() {
        const as = document.querySelectorAll('a');
        for(const o of as) {
            if (o.href) {
                o.href = bv2av(o.href);
            }
        }
        const divs = document.querySelectorAll('div');
        for(const o of divs) {
            if (o.title) {
                o.title = bv2av(o.title);
            }
        }
    }, 500);
})();