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Brume.mjs
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Brume.mjs
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export {Brume};
const jwt = {decode(t){return JSON.parse(atob(t.split('.')[1])); }},
OFFERTIMEOUT = 5 * 60 * 1000; // 5 minutes
/// #if WEBPACK
// #code import {EventEmitter} from 'events'; //webpack/fileGroup
// #code import SimplePeer from 'simple-peer';
// #code import {Channel} from 'Channel';
/// #else
let wrtc, EventEmitter, SimplePeer, Channel, refreshTokenAuth;
if(typeof window == 'undefined') {
({refreshTokenAuth} = await import('./cognitoAuth.mjs'));
EventEmitter = (await import('events')).default;
SimplePeer = (await import('simple-peer')).default;
({Channel} = await import('Channel'));
wrtc = (await import('@koush/wrtc')).default;
global.WebSocket = (await import('ws')).default;
} else {
await import('/node_modules/browser-cjs/require.js');
EventEmitter = require('/node_modules/events/events.js');
SimplePeer = require('/node_modules/simple-peer/simplepeer.min.js');
({Channel} = await import('/node_modules/Channel/Channel.mjs'));
}
/// #endif
const CLIENTID = '6dspdoqn9q00f0v42c12qvkh5l',
errorCodeMessages = {
400: 'Missing token',
401: 'Unauthorized',
402: 'Payment required',
403: 'Invalid server url',
404: 'This user is unknown',
406: 'Bad token',
409: 'This user is already connected',
500: 'Server error',
501: 'Server error',
ECONNREFUSED: '',
ENOTFOUND: '',
ENODEST: '',
EOFFERTIMEOUT: '',
NotAuthorizedException: 'Invalid Refresh Token'
};
function wsConnect({token, url}) {
return new Promise((res, rej) => {
let ws = typeof window == undefined
? new WebSocket(url, { headers : { token }, rejectUnauthorized: false })
: new WebSocket(`${url}?token=${token}`);
//ws.on('pong', ()=>{});
ws.onopen = () => { res(ws); };
ws.onerror = err => {
// make codes recognize: ECONNREFUSED, ENOTFOUND in err.message
const code = err?.message
? err?.message.match(/: (\d*)/)
? err.message.match(/: (\d*)/)[1]
: undefined
: undefined;
rej(code && errorCodeMessages[code] ? {message:`${errorCodeMessages[code]} ${code}`, code} : err);
};
});
}
function setPingInterval(ws){
return typeof ws?.ping === 'function'
? setInterval(function(){ws.ping(()=>{});}, 9.8 * 60 * 1000)
: null;
}
class Brume extends EventEmitter {
#user = undefined;
#ws = undefined;
#peers = {};
#config = undefined;
#offerProcessor;
#connectionQ;
constructor(config){
super();
try {
if(config){
this.#config = config;
this.#user = jwt.decode(config.token)['custom:brume_name'];
}
this.#connectionQ = new Channel;
} catch(e) { throw(e); }
}
async #openWs({token, url}){
this.#ws = await wsConnect({token, url});
const pingInterval = setPingInterval(this.#ws);
this.#ws.addEventListener('message', msg=>{
const {from, channelId, data} = JSON.parse(msg.data);
switch (data.type) {
case 'offer':
if(this.#peers[channelId]) {
// offer resulted from renegotiate sent by this existing peer
this.#peers[channelId].signal(data);
} else {
// new offer requirung
this.emit('offer', data, from, channelId);
}
break;
case 'candidate':
case 'answer':
case 'renegotiate':
if(data.type == 'answer'){
clearTimeout(this.#peers[channelId]?.offerTimer);
}
if(this.#peers[channelId])
this.#peers[channelId].signal(data);
break;
case 'peerError':
this.#peers[channelId].emit('peerError', data);
break;
default:
this.emit('error', {code: 'EUNKNOWNMSG', message: `Unknown message from peer or Brume server: ${data.type}`});;
break;
}
});
this.#ws.addEventListener('close', (event) => {
if(this.listeners('serverclose').length == 0) {
setTimeout(async ()=>{ await this.start(); }, 10*1000); //give server time to delete closed session
} else {
this.emit('serverclose');
}
clearInterval(pingInterval);
this.stop();
});
};
get thisUser() { return this.#user; }
set onconnection(func){ this.#offerProcessor = func; }
start(config = undefined){ // browser Brume doesn't have config until start
if(config){
this.#config = config;
this.#user = jwt.decode(config.token)['custom:brume_name'];
}
return new Promise(async (res, rej) => {
try {
let peer = undefined;
await this.#openWs({token: this.#config.token, url: this.#config.url});
this.addListener('offer', async (offer, from, channelId)=>{
peer = new SimplePeer({channelId, trickle: false, ...(typeof wrtc != 'undefined' ? {wrtc} : {})});
this.#peers[channelId] = peer;
peer.channelId = channelId;
peer.peerUsername = from;
peer.on('signal', data => {
const msg = data.candidate ? {type: 'candidate', candidate: data} : {type: data.type, data};
msg.channelId = peer.channelId;
this.#ws.send(JSON.stringify({ action: 'send', to: from, data: msg }));
});
peer.on('error', (e) => { rej(e); });
peer.on('close', () => { delete this.#peers[peer.channelId]; });
let rVal = { // use instead of peer for offerProcessor
peer,
async accept(){
peer.signal(offer);
return await new Promise(res => { peer.on('connect', ()=>{ res(); }); });
}
};
await this.#offerProcessor ? this.#offerProcessor(rVal) : this.#connectionQ.send(rVal);
});
res();
} catch(e) {
if(e?.code && e.code == '401'){
try{
let {IdToken} = await refreshTokenAuth(CLIENTID, this.#config.RefreshToken);
this.#config.token = IdToken;
this.emit('reauthorize', this.#config);
await this.#openWs({token: this.#config.token, url: this.#config.url});
res(this);
} catch(e) {
rej(e);
}
} else {
rej(e);
}
}
});
}
stop(){ this.#ws = null; }
async connection(){
if(this.#offerProcessor) return null;
try{ return await this.#connectionQ.get(); }
catch(e){ return null; }
}
async connect(dest){
const peer = new SimplePeer({initiator: true, trickle: false, ...(typeof wrtc != 'undefined' ? {wrtc} : {})});
peer.peerUsername = dest;
peer.channelId = this.#user + Math.random().toString(10).slice(2,8);
this.#peers[peer.channelId] = peer;
try{
return await new Promise((res, rej) => {
peer.on('signal', data => {
const msg = data.candidate ? {type: 'candidate', candidate: data} : {type: data.type, data};
msg.channelId = peer.channelId;
peer.offerTimer = setTimeout(()=>{
peer.emit('peerError', { code: "EOFFERTIMEOUT", peerUsername: dest });
delete this.#peers[peer.channelId];
}, OFFERTIMEOUT);
this.#ws.send(JSON.stringify({ action: 'send', to: dest, data: {channelId: peer.channelId, data} }));
});
peer.on('connect', () => { res(peer); });
peer.on('error', (e) => { rej(e); });
peer.on('peerError', ({code, peerUsername}) => {
clearTimeout(peer.offerTimer);
delete this.#peers[peer.channelId];
rej({code: code, peerUsername, type: 'peerError', message: `${peerUsername} connection request timeout`});
});
peer.on('close', () => { delete this.#peers[peer.channelId]; });
});
} catch(e) {
throw(e);
}
};
}