424 lines
17 KiB
TypeScript
424 lines
17 KiB
TypeScript
import {
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WebRtcDisconnectMessageInterface,
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WebRtcSignalReceivedMessageInterface,
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} from "../Connexion/ConnexionModels";
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import {
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mediaManager,
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StartScreenSharingCallback,
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StopScreenSharingCallback,
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UpdatedLocalStreamCallback
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} from "./MediaManager";
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import {ScreenSharingPeer} from "./ScreenSharingPeer";
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import {MESSAGE_TYPE_CONSTRAINT, MESSAGE_TYPE_MESSAGE, VideoPeer} from "./VideoPeer";
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import {RoomConnection} from "../Connexion/RoomConnection";
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export interface UserSimplePeerInterface{
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userId: number;
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name?: string;
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initiator?: boolean;
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}
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export interface PeerConnectionListener {
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onConnect(user: UserSimplePeerInterface): void;
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onDisconnect(userId: number): void;
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}
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/**
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* This class manages connections to all the peers in the same group as me.
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*/
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export class SimplePeer {
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private Users: Array<UserSimplePeerInterface> = new Array<UserSimplePeerInterface>(); //todo: this array should be fusionned with PeerConnectionArray
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private PeerScreenSharingConnectionArray: Map<number, ScreenSharingPeer> = new Map<number, ScreenSharingPeer>();
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private PeerConnectionArray: Map<number, VideoPeer> = new Map<number, VideoPeer>();
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private readonly sendLocalVideoStreamCallback: UpdatedLocalStreamCallback;
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private readonly sendLocalScreenSharingStreamCallback: StartScreenSharingCallback;
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private readonly stopLocalScreenSharingStreamCallback: StopScreenSharingCallback;
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private readonly peerConnectionListeners: Array<PeerConnectionListener> = new Array<PeerConnectionListener>();
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constructor(private Connection: RoomConnection, private enableReporting: boolean, private myName: string) {
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// We need to go through this weird bound function pointer in order to be able to "free" this reference later.
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this.sendLocalVideoStreamCallback = this.sendLocalVideoStream.bind(this);
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this.sendLocalScreenSharingStreamCallback = this.sendLocalScreenSharingStream.bind(this);
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this.stopLocalScreenSharingStreamCallback = this.stopLocalScreenSharingStream.bind(this);
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mediaManager.onUpdateLocalStream(this.sendLocalVideoStreamCallback);
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mediaManager.onStartScreenSharing(this.sendLocalScreenSharingStreamCallback);
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mediaManager.onStopScreenSharing(this.stopLocalScreenSharingStreamCallback);
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this.initialise();
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}
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public registerPeerConnectionListener(peerConnectionListener: PeerConnectionListener) {
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this.peerConnectionListeners.push(peerConnectionListener);
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}
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public getNbConnections(): number {
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return this.PeerConnectionArray.size;
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}
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/**
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* permit to listen when user could start visio
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*/
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private initialise() {
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//receive signal by gemer
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this.Connection.receiveWebrtcSignal((message: WebRtcSignalReceivedMessageInterface) => {
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this.receiveWebrtcSignal(message);
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});
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//receive signal by gemer
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this.Connection.receiveWebrtcScreenSharingSignal((message: WebRtcSignalReceivedMessageInterface) => {
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this.receiveWebrtcScreenSharingSignal(message);
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});
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mediaManager.showGameOverlay();
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mediaManager.getCamera().then(() => {
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//receive message start
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this.Connection.receiveWebrtcStart((message: UserSimplePeerInterface) => {
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this.receiveWebrtcStart(message);
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});
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}).catch((err) => {
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console.error("err", err);
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});
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this.Connection.disconnectMessage((data: WebRtcDisconnectMessageInterface): void => {
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this.closeConnection(data.userId);
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});
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}
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private receiveWebrtcStart(user: UserSimplePeerInterface) {
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//this.WebRtcRoomId = data.roomId;
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this.Users.push(user);
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// Note: the clients array contain the list of all clients (even the ones we are already connected to in case a user joints a group)
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// So we can receive a request we already had before. (which will abort at the first line of createPeerConnection)
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// This would be symmetrical to the way we handle disconnection.
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//start connection
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console.log('receiveWebrtcStart. Initiator: ', user.initiator)
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if(!user.initiator){
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return;
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}
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this.createPeerConnection(user);
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}
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/**
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* create peer connection to bind users
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*/
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private createPeerConnection(user : UserSimplePeerInterface) : VideoPeer | null {
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const peerConnection = this.PeerConnectionArray.get(user.userId)
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if (peerConnection) {
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if (peerConnection.destroyed) {
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peerConnection.toClose = true;
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peerConnection.destroy();
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const peerConnexionDeleted = this.PeerConnectionArray.delete(user.userId);
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if (!peerConnexionDeleted) {
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throw 'Error to delete peer connection';
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}
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this.createPeerConnection(user);
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} else {
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peerConnection.toClose = false;
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}
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return null;
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}
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let name = user.name;
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if (!name) {
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const userSearch = this.Users.find((userSearch: UserSimplePeerInterface) => userSearch.userId === user.userId);
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if (userSearch) {
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name = userSearch.name;
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}
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}
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mediaManager.removeActiveVideo("" + user.userId);
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const reportCallback = this.enableReporting ? (comment: string) => {
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this.reportUser(user.userId, comment);
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} : undefined;
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mediaManager.addActiveVideo("" + user.userId, reportCallback, name);
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const peer = new VideoPeer(user.userId, user.initiator ? user.initiator : false, this.Connection);
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//permit to send message
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mediaManager.addSendMessageCallback(user.userId,(message: string) => {
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peer.write(new Buffer(JSON.stringify({type: MESSAGE_TYPE_MESSAGE, name: this.myName.toUpperCase(), message: message})));
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});
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peer.toClose = false;
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// When a connection is established to a video stream, and if a screen sharing is taking place,
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// the user sharing screen should also initiate a connection to the remote user!
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peer.on('connect', () => {
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if (mediaManager.localScreenCapture) {
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this.sendLocalScreenSharingStreamToUser(user.userId);
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}
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});
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this.PeerConnectionArray.set(user.userId, peer);
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for (const peerConnectionListener of this.peerConnectionListeners) {
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peerConnectionListener.onConnect(user);
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}
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return peer;
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}
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/**
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* create peer connection to bind users
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*/
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private createPeerScreenSharingConnection(user : UserSimplePeerInterface) : ScreenSharingPeer | null{
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const peerConnection = this.PeerScreenSharingConnectionArray.get(user.userId);
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if(peerConnection){
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if(peerConnection.destroyed){
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peerConnection.toClose = true;
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peerConnection.destroy();
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const peerConnexionDeleted = this.PeerScreenSharingConnectionArray.delete(user.userId);
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if(!peerConnexionDeleted){
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throw 'Error to delete peer connection';
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}
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this.createPeerConnection(user);
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}else {
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peerConnection.toClose = false;
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}
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return null;
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}
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// We should display the screen sharing ONLY if we are not initiator
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if (!user.initiator) {
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mediaManager.removeActiveScreenSharingVideo("" + user.userId);
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mediaManager.addScreenSharingActiveVideo("" + user.userId);
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}
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const peer = new ScreenSharingPeer(user.userId, user.initiator ? user.initiator : false, this.Connection);
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this.PeerScreenSharingConnectionArray.set(user.userId, peer);
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for (const peerConnectionListener of this.peerConnectionListeners) {
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peerConnectionListener.onConnect(user);
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}
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return peer;
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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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private closeConnection(userId : number) {
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mediaManager.playWebrtcOutSound();
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try {
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const peer = this.PeerConnectionArray.get(userId);
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if (peer === undefined) {
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console.warn("closeConnection => Tried to close connection for user "+userId+" but could not find user");
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return;
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}
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//create temp perr to close
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peer.toClose = true;
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peer.destroy();
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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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this.closeScreenSharingConnection(userId);
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for (const peerConnectionListener of this.peerConnectionListeners) {
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peerConnectionListener.onDisconnect(userId);
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}
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const userIndex = this.Users.findIndex(user => user.userId === userId);
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if(userIndex < 0){
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throw 'Couln\'t delete user';
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} else {
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this.Users.splice(userIndex, 1);
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}
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} catch (err) {
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console.error("closeConnection", 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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private closeScreenSharingConnection(userId : number) {
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try {
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mediaManager.removeActiveScreenSharingVideo("" + userId);
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const peer = this.PeerScreenSharingConnectionArray.get(userId);
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if (peer === undefined) {
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console.warn("closeScreenSharingConnection => Tried to close connection for user "+userId+" but could not find user")
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return;
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}
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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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peer.destroy();
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if(!this.PeerScreenSharingConnectionArray.delete(userId)){
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throw 'Couln\'t delete peer screen sharing connexion';
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}
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//console.log('Nb users in peerConnectionArray '+this.PeerConnectionArray.size);
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} catch (err) {
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console.error("closeConnection", err)
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}
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}
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public closeAllConnections() {
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for (const userId of this.PeerConnectionArray.keys()) {
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this.closeConnection(userId);
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}
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for (const userId of this.PeerScreenSharingConnectionArray.keys()) {
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this.closeScreenSharingConnection(userId);
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}
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}
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/**
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* Unregisters any held event handler.
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*/
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public unregister() {
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mediaManager.removeUpdateLocalStreamEventListener(this.sendLocalVideoStreamCallback);
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}
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// eslint-disable-next-line @typescript-eslint/no-explicit-any
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private receiveWebrtcSignal(data: WebRtcSignalReceivedMessageInterface) {
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try {
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//if offer type, create peer connection
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if(data.signal.type === "offer"){
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this.createPeerConnection(data);
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}
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const peer = this.PeerConnectionArray.get(data.userId);
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if (peer !== undefined) {
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peer.signal(data.signal);
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} else {
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console.error('Could not find peer whose ID is "'+data.userId+'" in PeerConnectionArray');
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}
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} catch (e) {
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console.error(`receiveWebrtcSignal => ${data.userId}`, e);
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}
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}
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private receiveWebrtcScreenSharingSignal(data: WebRtcSignalReceivedMessageInterface) {
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console.log("receiveWebrtcScreenSharingSignal", data);
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try {
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//if offer type, create peer connection
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if(data.signal.type === "offer"){
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this.createPeerScreenSharingConnection(data);
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}
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const peer = this.PeerScreenSharingConnectionArray.get(data.userId);
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if (peer !== undefined) {
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peer.signal(data.signal);
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} else {
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console.error('Could not find peer whose ID is "'+data.userId+'" in receiveWebrtcScreenSharingSignal');
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}
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} catch (e) {
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console.error(`receiveWebrtcSignal => ${data.userId}`, e);
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//force delete and recreate peer connexion
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this.PeerScreenSharingConnectionArray.delete(data.userId);
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this.receiveWebrtcScreenSharingSignal(data);
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}
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}
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private pushVideoToRemoteUser(userId : number) {
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try {
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const PeerConnection = this.PeerConnectionArray.get(userId);
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if (!PeerConnection) {
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throw new Error('While adding media, cannot find user with ID ' + userId);
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}
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const localStream: MediaStream | null = mediaManager.localStream;
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PeerConnection.write(new Buffer(JSON.stringify({type: MESSAGE_TYPE_CONSTRAINT, ...mediaManager.constraintsMedia})));
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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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//todo: this is a ugly hack to reduce the amount of error in console. Find a better way.
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if ((track as any).added !== undefined) continue; // eslint-disable-line @typescript-eslint/no-explicit-any
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(track as any).added = true; // eslint-disable-line @typescript-eslint/no-explicit-any
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PeerConnection.addTrack(track, localStream);
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}
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}catch (e) {
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console.error(`pushVideoToRemoteUser => ${userId}`, e);
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}
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}
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private pushScreenSharingToRemoteUser(userId : number) {
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const PeerConnection = this.PeerScreenSharingConnectionArray.get(userId);
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if (!PeerConnection) {
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throw new Error('While pushing screen sharing, cannot find user with ID ' + userId);
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}
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const localScreenCapture: MediaStream | null = mediaManager.localScreenCapture;
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if(!localScreenCapture){
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return;
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}
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for (const track of localScreenCapture.getTracks()) {
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PeerConnection.addTrack(track, localScreenCapture);
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}
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return;
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}
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public sendLocalVideoStream(){
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for (const user of this.Users) {
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this.pushVideoToRemoteUser(user.userId);
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}
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}
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/**
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* Triggered locally when clicking on the screen sharing button
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*/
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public sendLocalScreenSharingStream() {
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if (!mediaManager.localScreenCapture) {
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console.error('Could not find localScreenCapture to share')
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return;
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}
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for (const user of this.Users) {
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this.sendLocalScreenSharingStreamToUser(user.userId);
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}
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}
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/**
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* Triggered locally when clicking on the screen sharing button
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*/
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public stopLocalScreenSharingStream(stream: MediaStream) {
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for (const user of this.Users) {
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this.stopLocalScreenSharingStreamToUser(user.userId, stream);
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}
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}
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/**
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* Triggered locally when clicking on the report button
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*/
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public reportUser(userId: number, message: string) {
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this.Connection.emitReportPlayerMessage(userId, message)
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}
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private sendLocalScreenSharingStreamToUser(userId: number): void {
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// If a connection already exists with user (because it is already sharing a screen with us... let's use this connection)
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if (this.PeerScreenSharingConnectionArray.has(userId)) {
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this.pushScreenSharingToRemoteUser(userId);
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return;
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}
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const screenSharingUser: UserSimplePeerInterface = {
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userId,
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initiator: true
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};
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const PeerConnectionScreenSharing = this.createPeerScreenSharingConnection(screenSharingUser);
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if (!PeerConnectionScreenSharing) {
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return;
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}
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}
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private stopLocalScreenSharingStreamToUser(userId: number, stream: MediaStream): void {
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const PeerConnectionScreenSharing = this.PeerScreenSharingConnectionArray.get(userId);
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if (!PeerConnectionScreenSharing) {
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throw new Error('Weird, screen sharing connection to user ' + userId + 'not found')
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}
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console.log("updatedScreenSharing => destroy", PeerConnectionScreenSharing);
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// Stop sending stream and close peer connection if peer is not sending stream too
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PeerConnectionScreenSharing.stopPushingScreenSharingToRemoteUser(stream);
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if (!PeerConnectionScreenSharing.isReceivingScreenSharingStream()) {
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PeerConnectionScreenSharing.destroy();
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this.PeerScreenSharingConnectionArray.delete(userId);
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}
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}
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}
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