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b站直播展示优化

首页动态直播展示优化

// ==UserScript==
// @name         b站直播展示优化
// @namespace    http://tampermonkey.net/
// @version      2024-10-12
// @description   首页动态直播展示优化
// @author       口吃者
// @match        https://www.bilibili.com/
// @match        https://www.bilibili.com/*
// @icon         https://www.google.com/s2/favicons?sz=64&domain=bilibili.com
// @grant        none
// @license MIT
// ==/UserScript==
/* 
    1. 动态mouseenter状态时，重新请求获取一次数据，避免每次更新都需要点刷新
    2. 原先最大只可以显示5条，现在追加显示剩下的全部
*/
const live_up_list_url = "https://api.bilibili.com/x/polymer/web-dynamic/v1/live-up";
const ifLoadOk = false;
let currentIntervalId; // 用于存储当前的定时器 ID
let ups = [];
class BiUp {
    constructor(face, isReserveRecall, link, mid, uname) {
      this.face = face;          // 用户头像链接
      this.isReserveRecall = isReserveRecall; // 是否保留召回标志，通常是一个布尔值
      this.link = link;          // 用户主页链接
      this.mid = mid;            // 用户ID
      this.uname = uname;        // 用户名
    }
    getDetails() {
      return `User Name: ${this.uname}, User ID: ${this.mid}, Link: ${this.link}`;
    }

    getLiveUpItemDom() {
        var htmlTemplet = `<a data-v-cbe437ce="" class="up-item" target="_blank" data-mod="top_right_bar_window_dynamic" data-idx="content" data-ext="click" href="https://live.bilibili.com/30027356?live_from=82002" style="transform: translateX(0px);"><div data-v-cbe437ce="" class="up-avatar"><picture data-v-cbe437ce="" class="v-img up-avatar__img"><source srcset="//i0.hdslb.com/bfs/face/6a2dbf2d67fe5d0ce66d6aacad5977503c1b2053.jpg@84w_84h.avif" type="image/avif"><source srcset="//i0.hdslb.com/bfs/face/6a2dbf2d67fe5d0ce66d6aacad5977503c1b2053.jpg@84w_84h.webp" type="image/webp"><img src="//i0.hdslb.com/bfs/face/6a2dbf2d67fe5d0ce66d6aacad5977503c1b2053.jpg@84w_84h" alt="" loading="lazy" onload="" onerror="typeof window.imgOnError === 'function' &amp;&amp; window.imgOnError(this)"></picture></div><div data-v-cbe437ce=""><div data-v-cbe437ce="" class="up-name">锅包柔柔</div></div></a>`
        // 创建 DOMParser 对象
        const parser = new DOMParser();
        var doc = parser.parseFromString(htmlTemplet, 'text/html');
        //http -> https 防报错
        doc.querySelector("a").href = updateProtocol(this.link) + "?live_from=82002"; // 链接后还有 live_from 来源参数，可以不添加
        //图像 @84w_84裁剪成84*84像素
        doc.querySelector("picture :nth-child(1)").srcset = updateProtocol(this.face) + "@84w_84h.avif";
        doc.querySelector("picture :nth-child(2)").srcset = updateProtocol(this.face) + "@84w_84h.webp";
        doc.querySelector("picture :nth-child(3)").srcset = updateProtocol(this.face) + "@84w_84h";
        doc.querySelector(".up-name").textContent = this.uname;
        return doc;
    }

  }
(function() {
    'use strict';
    ups = getLiveUpList();
    window.addEventListener("load", ()=>{
        loadLivingUp();
        //每次mouseenter 都重新加载一次
        let dynamicEle = document.querySelector("ul.right-entry > li:nth-child(4)");
        dynamicEle.addEventListener("mouseenter", function(){
            console.log("mouseenter--55");
            startChecking();
        });

        dynamicEle.addEventListener("mouseleave", function(){
            clearInterval(currentIntervalId);
        });
    });
    // console.log(ups);
    // Your code here...
})();
async function getLiveUpList(){
    // console.log(currentIntervalId);
    console.log("重新加载");
    let url = live_up_list_url;
    let ups = [];
    fetch(
        url,
        {
            method: 'GET',
            credentials: 'include', // 使得请求会发送 Cookie
            headers: {
                'Content-Type': 'application/json; charset=utf-8',
            }
        }
    ).then(response => response.json())
    .then(data => {
        if(data.code !== 0){
            console.log("没有直播up");
            return;
        }
        const upData = data.data.items;
        upData.forEach(item => {
            let face = item.face;
            let isReserveRecall = item.is_reserve_recall;
            let link = item.link;
            let mid = item.mid;
            let uname = item.uname;
            let up = new BiUp(face, isReserveRecall, link, mid, uname);
            ups.push(up);
        });
        // console.log('Fetched UPS:', ups); // 检查是否正确填充了 ups
        return [...ups]; // 返回一个新数组，避免外部修改原数组
    }) // 打印解析后的数据
    .catch(error => console.error('Error:', error)); // 捕获任何发生的错误
    return ups;
}
function optimizeLiveUpList(ups) {
    const livingUpList = document.querySelector('.living-up-list');
    livingUpList.style.flexWrap = 'wrap'; // 使用属性方式设置样式，更高效
    livingUpList.innerHTML = '';

    // 检查ups是否为Promise
    if (ups instanceof Promise) {
        // 如果是Promise，解析后处理
        ups.then((array) => {
            renderItems(array);
        }).catch((error) => {
            console.error('An error occurred while fetching data:', error);
        });
    } else if (Array.isArray(ups)) {
        // 如果已经是数组，直接处理
        renderItems(ups);
    } else {
        console.error('ups must be an array or a Promise that resolves to an array.');
    }
}
function loadLivingUp(){
    // 获取目标元素
    const target = document.querySelector('ul.right-entry > li:nth-child(4)');

    // 创建 mouseenter 事件
    const mouseEnterEvent = new MouseEvent('mouseenter', {
        bubbles: true,
        cancelable: true,
        view: window
    });

    // 触发 mouseenter 事件
    target.dispatchEvent(mouseEnterEvent);

    optimizeLiveUpList01(target);
}
async function optimizeLiveUpList01(target){
    await new Promise(resolve => setTimeout(resolve, 1000));
    // 创建 mouseleave 事件
    const mouseLeaveEvent = new MouseEvent('mouseleave', {
        bubbles: true,
        cancelable: true,
        view: window
    });
    // 触发 mouseleave 事件，立即取消 mouseenter 状态
    target.dispatchEvent(mouseLeaveEvent);
    await new Promise(resolve => setTimeout(resolve, 1500));
    if(ups.length > 0){
        optimizeLiveUpList(ups);
    }
}
function updateProtocol(url) {
    // 检查字符串是否以 "http:" 开头
    if (url.startsWith('http:')) {
      // 替换 "http:" 为 "https:"
      return url.replace('http:', 'https:');
    } else {
      // 如果不是以 "http:" 开头，则直接返回原字符串
      return url;
    }
}
async function startChecking() {
  if (currentIntervalId) {
    clearInterval(currentIntervalId); // 如果已经有定时器在运行，则先清除之前的定时器
  }

  currentIntervalId = setInterval(async () => {
    try {
      const ups = await getLiveUpList();//await已经解析promise为数组
      await new Promise(resolve => setTimeout(resolve, 500));//不加延迟同步不生效
    //   console.log("ups:", ups);
    //   console.log("ups.length:", ups.length);
      if (ups.length > 0) {
        clearInterval(currentIntervalId); // 清除定时器
        optimizeLiveUpList(ups); // 请求成功时运行优化函数
      }
    } catch (error) {
      console.error('Error checking live up list:', error);
    }
  }, 500); // 每隔 1 秒检查一次
}
// 抽离渲染逻辑到单独的函数
function renderItems(array) {
    let livingUpList =  document.querySelector('.living-up-list');
    array.forEach((element, index) => {
        const linkElement = element.getLiveUpItemDom().querySelector('a');
        if (linkElement) {
            livingUpList.appendChild(linkElement);
        } else {
            console.warn(`Element at index ${index} does not contain an 'a' tag.`);
        }
    });
}