import { List, ListItem } from './weigets.js' export default class ClientList { constructor({ channels = {}, EventListeners = {}, name }) { this.channels = channels this.EventListeners = EventListeners const protocol = window.location.protocol === 'https:' ? 'wss' : 'ws' const host = window.location.host this.clientlist = [] this.ul = List({}) document.body.appendChild(this.ul) // 连接 WebSocket const linkStart = () => { const websocket = new WebSocket(`${protocol}://${host}/webrtc/music?name=${name}`) websocket.onmessage = async event => { const data = JSON.parse(event.data) const channels_init = (webrtc) => { return Object.entries(this.channels).map(([name, callback]) => { const channel = webrtc.createDataChannel(name, { reliable: true }) channel.onopen = callback.onopen channel.onclose = callback.onclose channel.onerror = callback.onerror channel.onmessage = callback.onmessage return channel }) } const webrtc_init = () => { const webrtc = new RTCPeerConnection() webrtc.onicecandidate = event => { if (event.candidate) { websocket.send(JSON.stringify({ type: 'candidate', id: data.id, candidate: event.candidate })) } } webrtc.ondatachannel = ({ channel }) => { console.log('收到对方 datachannel', channel) channel.onmessage = event => { //console.log('收到对方 datachannel message', event) if (this.channels[event.target.label]) { this.channels[event.target.label].onmessage(event, this.clientlist.find(x => x.id === data.id)) } } } webrtc.oniceconnectionstatechange = event => { //console.log('WebRTC ICE 连接状态更改:', webrtc.iceConnectionState) } return webrtc } if (data.type === 'list') { //console.log('取得在线对端列表:', data) const webrtc = webrtc_init() const channels = channels_init(webrtc) //console.log('发送给对方 offer') const offer = await webrtc.createOffer() await webrtc.setLocalDescription(offer) this.clientlist.push({ id: data.id, name: data.name, webrtc, channels }) websocket.send(JSON.stringify({ type: 'offer', id: data.id, offer })) this.add(data) return } if (data.type === 'push') { //console.log('新上线客户端:', data) return this.add(data) } if (data.type === 'pull') { //console.log('移除客户端:', data) return this.remove(data) } if (data.type === 'offer') { //console.log('收到对方 offer', data) const webrtc = webrtc_init() const channels = channels_init(webrtc) this.clientlist.push({ id: data.id, name: data.name, webrtc, channels }) //console.log('发送给对方 answer') await webrtc.setRemoteDescription(data.offer) const answer = await webrtc.createAnswer() await webrtc.setLocalDescription(answer) websocket.send(JSON.stringify({ type: 'answer', id: data.id, answer })) return } if (data.type === 'answer') { //console.log('收到对方 answer', data) const pc = this.clientlist.find(client => client.id === data.id).webrtc await pc.setRemoteDescription(data.answer) return } if (data.type === 'candidate') { // console.log('收到 candidate 并将其添加到远程端', data.candidate) const pc = this.clientlist.find(client => client.id === data.id).webrtc await pc.addIceCandidate(data.candidate) return } console.log('收到未知数据:', data) } websocket.onclose = event => { console.log('WebSocket 断线重连...') setTimeout(() => { this.websocket = linkStart() }, 1000) } return websocket } this.websocket = linkStart() } setChannel(name, option) { this.channels[name] = option } add(item) { this.ul.appendChild(ListItem({ id: item.id, innerText: item.name ?? item.id, onclick: event => { }, chidren: [] })) } remove(item) { this.clientlist = this.clientlist.filter(client => client.id !== item.id) this.ul.removeChild(document.getElementById(item.id)) } // 添加回调函数 on(name, callback) { this.EventListeners[name] = callback } // 执行回调函数 _on(name, ...args) { if (this.EventListeners[name]) { this.EventListeners[name](...args) } } // 通过指定通道发送数据(广播) send(name, data) { //console.log('广播数据:', data, '到通道:', name, '到所有客户端') this.clientlist.forEach(client => { console.log('发送数据到客户端:', client.id, '通道:', name, '数据:', data) client.channels.filter(ch => ch.label === name).forEach(ch => { ch.send(data) }) }) } }