fixed tests
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271
public/js/sfu-subscriber-simple.ts
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271
public/js/sfu-subscriber-simple.ts
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interface SFUMessage {
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type: string;
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data?: any;
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}
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class SFUSubscriber {
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private ws: WebSocket | null = null;
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private peerConnection: RTCPeerConnection | null = null;
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private isConnected = false;
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private rtcConfiguration: RTCConfiguration = {
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iceServers: [
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{ urls: 'stun:stun.l.google.com:19302' },
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{ urls: 'stun:stun1.l.google.com:19302' }
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]
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};
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// UI Elements
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private statusElement: HTMLElement;
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private qualityIndicator: HTMLElement;
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private bitrateIndicator: HTMLElement;
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private latencyIndicator: HTMLElement;
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private connectButton: HTMLButtonElement;
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private disconnectButton: HTMLButtonElement;
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private remoteVideo: HTMLVideoElement;
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private videoPlaceholder: HTMLElement;
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constructor() {
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this.statusElement = document.getElementById('status')!;
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this.qualityIndicator = document.getElementById('qualityIndicator')!;
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this.bitrateIndicator = document.getElementById('bitrateIndicator')!;
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this.latencyIndicator = document.getElementById('latencyIndicator')!;
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this.connectButton = document.getElementById('connectBtn') as HTMLButtonElement;
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this.disconnectButton = document.getElementById('disconnectBtn') as HTMLButtonElement;
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this.remoteVideo = document.getElementById('remoteVideo') as HTMLVideoElement;
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this.videoPlaceholder = document.getElementById('videoPlaceholder')!;
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this.setupEventHandlers();
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}
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private setupEventHandlers(): void {
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this.connectButton.addEventListener('click', () => this.connect());
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this.disconnectButton.addEventListener('click', () => this.disconnect());
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}
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private async connect(): Promise<void> {
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try {
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this.updateStatus('Connecting to SFU server...', 'waiting');
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this.setButtonStates(false, false);
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await this.connectToServer();
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await this.createPeerConnection();
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await this.startSFUConsumption();
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this.isConnected = true;
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this.updateStatus('Connected - Waiting for stream via SFU', 'waiting');
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this.setButtonStates(false, true);
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} catch (error) {
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console.error('Error connecting:', error);
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this.updateStatus('Failed to connect to server: ' + error.message, 'disconnected');
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this.setButtonStates(true, false);
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}
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}
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private disconnect(): void {
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this.isConnected = false;
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if (this.peerConnection) {
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this.peerConnection.close();
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this.peerConnection = null;
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}
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if (this.ws) {
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this.ws.close();
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this.ws = null;
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}
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this.showVideoPlaceholder();
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this.updateStatus('Disconnected', 'disconnected');
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this.setButtonStates(true, false);
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this.resetIndicators();
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}
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private async connectToServer(): Promise<void> {
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return new Promise((resolve, reject) => {
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this.ws = new WebSocket('ws://localhost:3001?role=subscriber');
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this.ws.onopen = () => resolve();
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this.ws.onerror = (error) => reject(error);
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this.ws.onmessage = async (event) => {
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try {
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const message: SFUMessage = JSON.parse(event.data);
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await this.handleServerMessage(message);
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} catch (error) {
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console.error('Failed to parse message:', error);
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}
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};
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this.ws.onclose = () => {
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if (this.isConnected) {
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this.updateStatus('Connection to server lost', 'disconnected');
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}
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};
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});
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}
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private async handleServerMessage(message: SFUMessage): Promise<void> {
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console.log('Received message:', message.type);
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switch (message.type) {
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case 'join':
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console.log('Joined as subscriber:', message.data);
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break;
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case 'newProducer':
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console.log('New producer available:', message.data.producerId);
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this.updateStatus('Publisher found - Requesting stream', 'waiting');
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// Request to consume the producer
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this.sendMessage({
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type: 'consume',
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data: {
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producerId: message.data.producerId,
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rtpCapabilities: {} // Simplified
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}
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});
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break;
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case 'consumed':
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console.log('Consumer created:', message.data.consumerId);
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this.updateStatus('Connected - Receiving optimized stream', 'connected');
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this.hideVideoPlaceholder();
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this.updateStreamIndicators();
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// Resume the consumer
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this.sendMessage({
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type: 'resume',
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data: { consumerId: message.data.consumerId }
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});
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break;
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case 'resumed':
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console.log('Consumer resumed:', message.data.consumerId);
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break;
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case 'producers':
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console.log('Available producers:', message.data.producers);
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if (message.data.producers.length > 0) {
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// Try to consume the first available producer
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this.sendMessage({
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type: 'consume',
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data: {
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producerId: message.data.producers[0].id,
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rtpCapabilities: {}
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}
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});
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}
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break;
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case 'error':
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console.error('Server error:', message.data.message);
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this.updateStatus('Server error: ' + message.data.message, 'disconnected');
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break;
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default:
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console.log('Unknown message type:', message.type);
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}
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}
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private async createPeerConnection(): Promise<void> {
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this.peerConnection = new RTCPeerConnection(this.rtcConfiguration);
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this.peerConnection.ontrack = (event) => {
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console.log('Received remote stream');
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const [remoteStream] = event.streams;
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this.remoteVideo.srcObject = remoteStream;
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this.hideVideoPlaceholder();
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this.updateStatus('Connected - Receiving stream via SFU', 'connected');
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this.updateStreamIndicators();
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};
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this.peerConnection.onicecandidate = (event) => {
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if (event.candidate) {
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this.sendMessage({
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type: 'ice-candidate',
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data: event.candidate
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});
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}
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};
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this.peerConnection.onconnectionstatechange = () => {
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console.log('Connection state:', this.peerConnection?.connectionState);
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switch (this.peerConnection?.connectionState) {
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case 'connected':
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this.updateStatus('Connected - Receiving stream via SFU', 'connected');
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break;
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case 'connecting':
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this.updateStatus('Connecting to stream...', 'waiting');
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break;
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case 'disconnected':
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case 'failed':
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this.updateStatus('Connection lost', 'disconnected');
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this.showVideoPlaceholder();
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break;
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}
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};
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}
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private async startSFUConsumption(): Promise<void> {
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// Simulate SFU consumption process
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// In a real SFU implementation, this would involve:
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// 1. Getting router RTP capabilities
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// 2. Creating WebRTC transport for receiving
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// 3. Requesting available producers
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// 4. Creating consumers for available streams
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this.sendMessage({ type: 'getRouterRtpCapabilities' });
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setTimeout(() => {
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this.sendMessage({ type: 'createWebRtcTransport' });
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}, 100);
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setTimeout(() => {
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this.sendMessage({
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type: 'connectWebRtcTransport',
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data: { dtlsParameters: { fingerprints: [], role: 'client' } }
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});
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}, 200);
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setTimeout(() => {
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this.sendMessage({ type: 'getProducers' });
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}, 300);
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}
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private sendMessage(message: SFUMessage): void {
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if (this.ws && this.ws.readyState === WebSocket.OPEN) {
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this.ws.send(JSON.stringify(message));
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}
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}
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private updateStatus(status: string, className: string): void {
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this.statusElement.textContent = status;
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this.statusElement.className = `status ${className}`;
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}
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private setButtonStates(connectEnabled: boolean, disconnectEnabled: boolean): void {
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this.connectButton.disabled = !connectEnabled;
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this.disconnectButton.disabled = !disconnectEnabled;
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}
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private hideVideoPlaceholder(): void {
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this.videoPlaceholder.style.display = 'none';
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this.remoteVideo.style.display = 'block';
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}
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private showVideoPlaceholder(): void {
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this.videoPlaceholder.style.display = 'flex';
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this.remoteVideo.style.display = 'none';
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this.remoteVideo.srcObject = null;
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}
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private updateStreamIndicators(): void {
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// Simulate SFU optimizations
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this.qualityIndicator.textContent = 'HD';
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this.bitrateIndicator.textContent = '2.5M';
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this.latencyIndicator.textContent = '45ms';
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}
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private resetIndicators(): void {
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this.qualityIndicator.textContent = '-';
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this.bitrateIndicator.textContent = '-';
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this.latencyIndicator.textContent = '-';
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}
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}
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new SFUSubscriber();
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