resig.js
Version:
Universal reactive signal library with complete platform features: signals, animations, CRDTs, scheduling, DOM integration. Works identically across React, SolidJS, Svelte, Vue, and Qwik.
313 lines • 25 kB
JavaScript
"use strict";
/**
* WebRTC Streaming Signals
* Real-time collaboration with automatic reconnection and peer discovery
*/
Object.defineProperty(exports, "__esModule", { value: true });
exports.createWebRTCBroadcast = exports.createWebRTCStream = exports.BroadcastChannelSignaling = exports.WebRTCPeer = void 0;
const coalgebra_1 = require("./coalgebra");
// WebRTC peer connection wrapper
class WebRTCPeer {
constructor(peerId, config, signaling) {
this.peerId = peerId;
this.config = config;
this.signaling = signaling;
this.dataChannel = null;
this.reconnectAttempts = 0;
this.heartbeatTimer = null;
this.messageHandlers = new Set();
this.connection = new RTCPeerConnection({
iceServers: config.iceServers || [
{ urls: 'stun:stun.l.google.com:19302' },
],
});
this.setupConnection();
}
setupConnection() {
// Handle ICE candidates
this.connection.onicecandidate = (event) => {
if (event.candidate) {
this.signaling.iceCandidate(this.peerId, event.candidate.toJSON());
}
};
// Handle connection state changes
this.connection.onconnectionstatechange = () => {
const state = this.connection.connectionState;
if (state === 'failed' || state === 'disconnected') {
this.handleReconnection();
}
};
// Handle incoming data channels
this.connection.ondatachannel = (event) => {
this.setupDataChannel(event.channel);
};
}
setupDataChannel(channel) {
this.dataChannel = channel;
channel.onopen = () => {
this.startHeartbeat();
};
channel.onclose = () => {
this.stopHeartbeat();
};
channel.onmessage = (event) => {
try {
const data = JSON.parse(event.data);
if (data.type === 'heartbeat') {
// Respond to heartbeat
this.send({ type: 'heartbeat-response', timestamp: Date.now() });
}
else {
this.messageHandlers.forEach((handler) => handler(data));
}
}
catch (error) {
console.error('Failed to parse WebRTC message:', error);
}
};
channel.onerror = (error) => {
console.error('WebRTC data channel error:', error);
};
}
startHeartbeat() {
if (this.heartbeatTimer)
return;
const interval = this.config.heartbeatInterval || 30000; // 30 seconds
this.heartbeatTimer = window.setInterval(() => {
this.send({ type: 'heartbeat', timestamp: Date.now() });
}, interval);
}
stopHeartbeat() {
if (this.heartbeatTimer) {
clearInterval(this.heartbeatTimer);
this.heartbeatTimer = null;
}
}
async handleReconnection() {
const maxAttempts = this.config.reconnectAttempts || 5;
const delay = this.config.reconnectDelay || 1000;
if (this.reconnectAttempts >= maxAttempts) {
console.error(`Failed to reconnect to peer ${this.peerId} after ${maxAttempts} attempts`);
return;
}
this.reconnectAttempts++;
console.log(`Attempting to reconnect to peer ${this.peerId} (attempt ${this.reconnectAttempts})`);
await new Promise((resolve) => setTimeout(resolve, delay * this.reconnectAttempts));
try {
await this.createOffer();
}
catch (error) {
console.error('Reconnection failed:', error);
this.handleReconnection();
}
}
async createOffer() {
// Create data channel for outgoing connections
if (!this.dataChannel) {
this.dataChannel = this.connection.createDataChannel('data', this.config.dataChannelOptions);
this.setupDataChannel(this.dataChannel);
}
const offer = await this.connection.createOffer();
await this.connection.setLocalDescription(offer);
await this.signaling.offer(this.peerId, offer);
}
async handleOffer(offer) {
await this.connection.setRemoteDescription(offer);
const answer = await this.connection.createAnswer();
await this.connection.setLocalDescription(answer);
await this.signaling.answer(this.peerId, answer);
}
async handleAnswer(answer) {
await this.connection.setRemoteDescription(answer);
this.reconnectAttempts = 0; // Reset on successful connection
}
async handleIceCandidate(candidate) {
await this.connection.addIceCandidate(new RTCIceCandidate(candidate));
}
send(data) {
if (this.dataChannel && this.dataChannel.readyState === 'open') {
try {
this.dataChannel.send(JSON.stringify(data));
return true;
}
catch (error) {
console.error('Failed to send WebRTC message:', error);
return false;
}
}
return false;
}
onMessage(handler) {
this.messageHandlers.add(handler);
return () => this.messageHandlers.delete(handler);
}
getConnectionState() {
return this.connection.connectionState;
}
close() {
this.stopHeartbeat();
if (this.dataChannel) {
this.dataChannel.close();
}
this.connection.close();
}
}
exports.WebRTCPeer = WebRTCPeer;
// Simple signaling implementation using BroadcastChannel
class BroadcastChannelSignaling {
constructor(channelName = 'webrtc-signaling') {
this.offerHandlers = new Set();
this.answerHandlers = new Set();
this.iceCandidateHandlers = new Set();
this.channel = new BroadcastChannel(channelName);
this.channel.onmessage = this.handleMessage.bind(this);
}
handleMessage(event) {
const { type, peerId, data } = event.data;
switch (type) {
case 'offer':
this.offerHandlers.forEach((handler) => handler(peerId, data));
break;
case 'answer':
this.answerHandlers.forEach((handler) => handler(peerId, data));
break;
case 'ice-candidate':
this.iceCandidateHandlers.forEach((handler) => handler(peerId, data));
break;
}
}
async offer(peerId, offer) {
this.channel.postMessage({ type: 'offer', peerId, data: offer });
}
async answer(peerId, answer) {
this.channel.postMessage({ type: 'answer', peerId, data: answer });
}
async iceCandidate(peerId, candidate) {
this.channel.postMessage({
type: 'ice-candidate',
peerId,
data: candidate,
});
}
onOffer(callback) {
this.offerHandlers.add(callback);
}
onAnswer(callback) {
this.answerHandlers.add(callback);
}
onIceCandidate(callback) {
this.iceCandidateHandlers.add(callback);
}
close() {
this.channel.close();
}
}
exports.BroadcastChannelSignaling = BroadcastChannelSignaling;
// Create WebRTC streaming signal
const createWebRTCStream = (peerId, config = {}, signaling) => {
const stream = (0, coalgebra_1.createStreamingSignal)(null);
const sig = signaling || new BroadcastChannelSignaling();
const peer = new WebRTCPeer(peerId, config, sig);
// Handle incoming messages
peer.onMessage((data) => {
if (typeof data === 'object' &&
data !== null &&
'type' in data &&
data.type === 'stream-data' &&
'value' in data) {
stream._set(data.value);
}
});
// Setup signaling handlers
sig.onOffer(async (fromPeerId, offer) => {
if (fromPeerId === peerId) {
await peer.handleOffer(offer);
}
});
sig.onAnswer(async (fromPeerId, answer) => {
if (fromPeerId === peerId) {
await peer.handleAnswer(answer);
}
});
sig.onIceCandidate(async (fromPeerId, candidate) => {
if (fromPeerId === peerId) {
await peer.handleIceCandidate(candidate);
}
});
// Override _set to broadcast changes
const originalSet = stream
._set;
stream._set = (value) => {
originalSet(value);
peer.send({ type: 'stream-data', value, timestamp: Date.now() });
};
// Add peer management methods
stream.peer = peer;
stream.connect = () => peer.createOffer();
stream.disconnect = () => peer.close();
stream.getConnectionState = () => peer.getConnectionState();
return stream;
};
exports.createWebRTCStream = createWebRTCStream;
// Multi-peer WebRTC stream for broadcasting to multiple peers
const createWebRTCBroadcast = (peerIds, config = {}, signaling) => {
const stream = (0, coalgebra_1.createStreamingSignal)(null);
const sig = signaling || new BroadcastChannelSignaling();
const peers = new Map();
// Create peers for each peer ID
peerIds.forEach((peerId) => {
const peer = new WebRTCPeer(peerId, config, sig);
peers.set(peerId, peer);
// Handle incoming messages from any peer
peer.onMessage((data) => {
if (typeof data === 'object' &&
data !== null &&
'type' in data &&
data.type === 'stream-data' &&
'value' in data) {
stream._set(data.value);
}
});
});
// Setup signaling for all peers
sig.onOffer(async (fromPeerId, offer) => {
const peer = peers.get(fromPeerId);
if (peer) {
await peer.handleOffer(offer);
}
});
sig.onAnswer(async (fromPeerId, answer) => {
const peer = peers.get(fromPeerId);
if (peer) {
await peer.handleAnswer(answer);
}
});
sig.onIceCandidate(async (fromPeerId, candidate) => {
const peer = peers.get(fromPeerId);
if (peer) {
await peer.handleIceCandidate(candidate);
}
});
// Override _set to broadcast to all peers
const originalSet = stream
._set;
stream._set = (value) => {
originalSet(value);
const message = { type: 'stream-data', value, timestamp: Date.now() };
peers.forEach((peer) => peer.send(message));
};
// Add broadcast management methods
stream.peers = peers;
stream.connectAll = async () => {
const peerArray = Array.from(peers.values());
for (const peer of peerArray) {
await peer.createOffer();
}
};
stream.disconnectAll = () => {
peers.forEach((peer) => peer.close());
};
return stream;
};
exports.createWebRTCBroadcast = createWebRTCBroadcast;
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