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BiliOnlineHook

B站直播间同接数显示，弹幕HOOK框架

当前为 2024-10-27 提交的版本，查看 最新版本。

// ==UserScript==
// @name         BiliOnlineHook
// @description  B站直播间同接数显示，弹幕HOOK框架
// @namespace    http://tampermonkey.net/
// @version      0.1.2
// @author       jeffz615
// @match        *://live.bilibili.com/*
// @match        *://live.bilibili.com/blanc/*
// @icon         https://live.bilibili.com/favicon.ico
// @run-at       document-start
// @sandbox      raw
// @license      MIT
// ==/UserScript==

(function () {
    'use strict';

    function hook_wrapper() {
        let g_rank_count = 0;
        let g_online_count = 0;

        function on_online_rank_count(obj) {
            const rank_count = obj.data.count;
            const online_count = obj.data.online_count;
            let flag = false;
            if (rank_count && rank_count !== g_rank_count) {
                g_rank_count = rank_count;
                flag = true;
            }
            if (online_count && online_count !== g_online_count) {
                g_online_count = online_count;
                flag = true;
            }
            if (flag) {
                const showers = document.querySelectorAll("#rank-list-ctnr-box > div.tabs > ul > li.item");
                if (showers.length > 0) {
                    const origin_text = showers[0].innerText.split('(')[0];
                    showers[0].innerText = origin_text + '(' + g_rank_count + '/' + g_online_count + ')';
                    showers[0].setAttribute('title', '除号左边是贡献值非0人数，右边是所有人数。' + (g_online_count === 0 ? '' : ('计算结果：' + (g_rank_count / g_online_count * 100).toFixed(2) + '%')));
                }
            }
        }

        function on_send_gift(obj) {
            function calc_total_price(obj) {
                return obj.data.coin_type === 'gold' ? (obj.data.total_coin / 1000).toFixed(2) : '0.00';
            }

            console.debug('[BiliOnlineHook] SEND_GIFT', obj.data.uid, obj.data.uname, obj.data.action, obj.data.giftName, 'x', obj.data.num,
                calc_total_price(obj));
        }

        function on_danmu_msg(obj) {
            if (obj.info.length === 0 || obj.info[0].length <= 16 || obj.info[0][16].activity_identity !== '') {
                return;
            }
            /* uid, uname, msg */
            console.debug('[BiliOnlineHook] DANMU_MSG', obj.info[2][0], obj.info[2][1], obj.info[1]);
        }

        function on_guard_buy(obj) {
            /* uid, username, num, price, gift_name */
            console.debug('[BiliOnlineHook] GUARD_BUY', obj.data.uid, obj.data.username, obj.data.num, obj.data.price, obj.data.gift_name);
        }

        function on_super_chat_message(obj) {
            /* uid, uname, message, price, rmb */
            console.debug('[BiliOnlineHook] SUPER_CHAT_MESSAGE', obj.data.uid, obj.data.uname, obj.data.message, obj.data.price, obj.data.rmb);
        }

        function on_interact_word(obj) {
            /* uid, uname */
            console.debug('[BiliOnlineHook] INTERACT_WORD', obj.data.uid, obj.data.uname);
        }

        function on_entry_effect(obj) {
            /* uid, uinfo */
            console.debug('[BiliOnlineHook] ENTRY_EFFECT', obj.data.uid, obj.data.uinfo.base.name);
        }

        function on_raw(obj) {
            console.debug('[BiliOnlineHook]', obj);
        }

        const cb_map = {
            "ONLINE_RANK_COUNT": on_online_rank_count,
            "SEND_GIFT": on_send_gift,
            "DANMU_MSG": on_danmu_msg,
            "GUARD_BUY": on_guard_buy,
            "SUPER_CHAT_MESSAGE": on_super_chat_message,
            "ENTRY_EFFECT": on_entry_effect,
            "INTERACT_WORD": on_interact_word,
        };

        function check_stack() {
            const callstack = new Error().stack.split("\n");
            if (callstack.length < 4) {
                return false;
            }
            for (let call_func of callstack.slice(3)) {
                if (call_func.includes(".convertToObject ")) {
                    continue;
                } else if (call_func.includes(".onMessage ")) {
                    return true;
                }
                break;
            }
            return false;
        }

        const origin_parse = JSON.parse;
        JSON.parse = function (...args) {
            let result = origin_parse.apply(this, args);
            if (result.cmd && check_stack()) {
                const cb_func = cb_map[result.cmd];
                try {
                    if (cb_func) cb_func(result);
                } catch (err) {
                }
            }
            return result;
        }
    }

    hook_wrapper();
})();