275 lines
10 KiB
TypeScript
275 lines
10 KiB
TypeScript
import type * as SimplePeerNamespace from "simple-peer";
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import {mediaManager} from "./MediaManager";
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import {STUN_SERVER, TURN_PASSWORD, TURN_SERVER, TURN_USER} from "../Enum/EnvironmentVariable";
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import type {RoomConnection} from "../Connexion/RoomConnection";
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import {blackListManager} from "./BlackListManager";
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import type {Subscription} from "rxjs";
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import type {UserSimplePeerInterface} from "./SimplePeer";
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import {get, readable, Readable} from "svelte/store";
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import {obtainedMediaConstraintStore} from "../Stores/MediaStore";
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import {DivImportance} from "./LayoutManager";
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import {discussionManager} from "./DiscussionManager";
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const Peer: SimplePeerNamespace.SimplePeer = require('simple-peer');
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export const MESSAGE_TYPE_CONSTRAINT = 'constraint';
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export const MESSAGE_TYPE_MESSAGE = 'message';
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export const MESSAGE_TYPE_BLOCKED = 'blocked';
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export const MESSAGE_TYPE_UNBLOCKED = 'unblocked';
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/**
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* A peer connection used to transmit video / audio signals between 2 peers.
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*/
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export class VideoPeer extends Peer {
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public toClose: boolean = false;
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public _connected: boolean = false;
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private remoteStream!: MediaStream;
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private blocked: boolean = false;
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public readonly userId: number;
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public readonly uniqueId: string;
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private onBlockSubscribe: Subscription;
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private onUnBlockSubscribe: Subscription;
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public readonly streamStore: Readable<MediaStream | null>;
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public readonly statusStore: Readable<"connecting" | "connected" | "error" | "closed">;
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public readonly constraintsStore: Readable<MediaStreamConstraints|null>;
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constructor(public user: UserSimplePeerInterface, initiator: boolean, public readonly userName: string, private connection: RoomConnection, localStream: MediaStream | null) {
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super({
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initiator: initiator ? initiator : false,
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//reconnectTimer: 10000,
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config: {
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iceServers: [
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{
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urls: STUN_SERVER.split(',')
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},
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TURN_SERVER !== '' ? {
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urls: TURN_SERVER.split(','),
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username: user.webRtcUser || TURN_USER,
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credential: user.webRtcPassword || TURN_PASSWORD
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} : undefined,
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].filter((value) => value !== undefined)
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}
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});
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this.userId = user.userId;
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this.uniqueId = 'video_'+this.userId;
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this.streamStore = readable<MediaStream|null>(null, (set) => {
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const onStream = (stream: MediaStream|null) => {
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set(stream);
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};
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const onData = (chunk: Buffer) => {
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this.on('data', (chunk: Buffer) => {
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const message = JSON.parse(chunk.toString('utf8'));
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if (message.type === MESSAGE_TYPE_CONSTRAINT) {
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if (!message.video) {
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set(null);
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}
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}
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});
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}
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this.on('stream', onStream);
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this.on('data', onData);
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return () => {
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this.off('stream', onStream);
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this.off('data', onData);
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};
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});
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this.constraintsStore = readable<MediaStreamConstraints|null>(null, (set) => {
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const onData = (chunk: Buffer) => {
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const message = JSON.parse(chunk.toString('utf8'));
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if(message.type === MESSAGE_TYPE_CONSTRAINT) {
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set(message);
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}
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}
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this.on('data', onData);
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return () => {
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this.off('data', onData);
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};
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});
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this.statusStore = readable<"connecting" | "connected" | "error" | "closed">("connecting", (set) => {
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const onConnect = () => {
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set('connected');
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};
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const onError = () => {
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set('error');
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};
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const onClose = () => {
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set('closed');
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};
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this.on('connect', onConnect);
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this.on('error', onError);
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this.on('close', onClose);
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return () => {
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this.off('connect', onConnect);
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this.off('error', onError);
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this.off('close', onClose);
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};
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});
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//start listen signal for the peer connection
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this.on('signal', (data: unknown) => {
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this.sendWebrtcSignal(data);
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});
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this.on('stream', (stream: MediaStream) => this.stream(stream));
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this.on('close', () => {
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this._connected = false;
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this.toClose = true;
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this.destroy();
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});
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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this.on('error', (err: any) => {
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console.error(`error => ${this.userId} => ${err.code}`, err);
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mediaManager.isError("" + this.userId);
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});
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this.on('connect', () => {
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this._connected = true;
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mediaManager.isConnected("" + this.userId);
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console.info(`connect => ${this.userId}`);
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});
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this.on('data', (chunk: Buffer) => {
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const message = JSON.parse(chunk.toString('utf8'));
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if(message.type === MESSAGE_TYPE_CONSTRAINT) {
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if (message.audio) {
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mediaManager.enabledMicrophoneByUserId(this.userId);
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} else {
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mediaManager.disabledMicrophoneByUserId(this.userId);
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}
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if (message.video || message.screen) {
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mediaManager.enabledVideoByUserId(this.userId);
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} else {
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mediaManager.disabledVideoByUserId(this.userId);
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}
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} else if(message.type === MESSAGE_TYPE_MESSAGE) {
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if (!blackListManager.isBlackListed(message.userId)) {
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mediaManager.addNewMessage(message.name, message.message);
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}
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} else if(message.type === MESSAGE_TYPE_BLOCKED) {
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//FIXME when A blacklists B, the output stream from A is muted in B's js client. This is insecure since B can manipulate the code to unmute A stream.
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// Find a way to block A's output stream in A's js client
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//However, the output stream stream B is correctly blocked in A client
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this.blocked = true;
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this.toggleRemoteStream(false);
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} else if(message.type === MESSAGE_TYPE_UNBLOCKED) {
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this.blocked = false;
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this.toggleRemoteStream(true);
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}
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});
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this.once('finish', () => {
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this._onFinish();
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});
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this.pushVideoToRemoteUser(localStream);
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this.onBlockSubscribe = blackListManager.onBlockStream.subscribe((userId) => {
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if (userId === this.userId) {
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this.toggleRemoteStream(false);
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this.sendBlockMessage(true);
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}
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});
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this.onUnBlockSubscribe = blackListManager.onUnBlockStream.subscribe((userId) => {
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if (userId === this.userId) {
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this.toggleRemoteStream(true);
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this.sendBlockMessage(false);
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}
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});
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if (blackListManager.isBlackListed(this.userId)) {
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this.sendBlockMessage(true)
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}
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}
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private sendBlockMessage(blocking: boolean) {
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this.write(new Buffer(JSON.stringify({type: blocking ? MESSAGE_TYPE_BLOCKED : MESSAGE_TYPE_UNBLOCKED, name: this.userName.toUpperCase(), userId: this.userId, message: ''})));
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}
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private toggleRemoteStream(enable: boolean) {
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this.remoteStream.getTracks().forEach(track => track.enabled = enable);
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mediaManager.toggleBlockLogo(this.userId, !enable);
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}
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private sendWebrtcSignal(data: unknown) {
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try {
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this.connection.sendWebrtcSignal(data, this.userId);
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}catch (e) {
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console.error(`sendWebrtcSignal => ${this.userId}`, e);
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}
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}
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/**
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* Sends received stream to screen.
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*/
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private stream(stream: MediaStream) {
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try {
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this.remoteStream = stream;
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if (blackListManager.isBlackListed(this.userId) || this.blocked) {
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this.toggleRemoteStream(false);
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}
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//mediaManager.addStreamRemoteVideo("" + this.userId, stream);
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}catch (err){
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console.error(err);
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}
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}
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/**
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* This is triggered twice. Once by the server, and once by a remote client disconnecting
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*/
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public destroy(error?: Error): void {
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try {
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this._connected = false
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if(!this.toClose){
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return;
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}
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this.onBlockSubscribe.unsubscribe();
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this.onUnBlockSubscribe.unsubscribe();
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discussionManager.removeParticipant(this.userId);
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// FIXME: I don't understand why "Closing connection with" message is displayed TWICE before "Nb users in peerConnectionArray"
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// I do understand the method closeConnection is called twice, but I don't understand how they manage to run in parallel.
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super.destroy(error);
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} catch (err) {
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console.error("VideoPeer::destroy", err)
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}
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}
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_onFinish () {
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if (this.destroyed) return
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const destroySoon = () => {
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this.destroy();
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}
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if (this._connected) {
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destroySoon();
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} else {
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this.once('connect', destroySoon);
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}
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}
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private pushVideoToRemoteUser(localStream: MediaStream | null) {
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try {
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this.write(new Buffer(JSON.stringify({type: MESSAGE_TYPE_CONSTRAINT, ...get(obtainedMediaConstraintStore)})));
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if(!localStream){
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return;
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}
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for (const track of localStream.getTracks()) {
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this.addTrack(track, localStream);
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}
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}catch (e) {
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console.error(`pushVideoToRemoteUser => ${this.userId}`, e);
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}
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}
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}
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