412 lines
16 KiB
TypeScript
412 lines
16 KiB
TypeScript
import type {
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WebRtcDisconnectMessageInterface,
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WebRtcSignalReceivedMessageInterface,
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} from "../Connexion/ConnexionModels";
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import { mediaManager, StartScreenSharingCallback, StopScreenSharingCallback } from "./MediaManager";
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import { ScreenSharingPeer } from "./ScreenSharingPeer";
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import { VideoPeer } from "./VideoPeer";
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import type { RoomConnection } from "../Connexion/RoomConnection";
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import { blackListManager } from "./BlackListManager";
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import { get } from "svelte/store";
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import { screenSharingLocalStreamStore } from "../Stores/ScreenSharingStore";
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import { playersStore } from "../Stores/PlayersStore";
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import { peerStore, screenSharingPeerStore } from "../Stores/PeerStore";
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export interface UserSimplePeerInterface {
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userId: number;
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initiator?: boolean;
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webRtcUser?: string | undefined;
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webRtcPassword?: string | undefined;
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}
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export type RemotePeer = VideoPeer | ScreenSharingPeer;
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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 sendLocalScreenSharingStreamCallback: StartScreenSharingCallback;
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private readonly stopLocalScreenSharingStreamCallback: StopScreenSharingCallback;
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private readonly unsubscribers: (() => void)[] = [];
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private readonly userId: number;
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private lastWebrtcUserName: string | undefined;
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private lastWebrtcPassword: string | undefined;
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constructor(private Connection: RoomConnection) {
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//we make sure we don't get any old peer.
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peerStore.cleanupStore();
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screenSharingPeerStore.cleanupStore();
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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.sendLocalScreenSharingStreamCallback = this.sendLocalScreenSharingStream.bind(this);
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this.stopLocalScreenSharingStreamCallback = this.stopLocalScreenSharingStream.bind(this);
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let localScreenCapture: MediaStream | null = null;
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//todo
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this.unsubscribers.push(
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screenSharingLocalStreamStore.subscribe((streamResult) => {
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if (streamResult.type === "error") {
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// Let's ignore screen sharing errors, we will deal with those in a different way.
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return;
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}
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if (streamResult.stream !== null) {
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localScreenCapture = streamResult.stream;
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this.sendLocalScreenSharingStream(localScreenCapture);
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} else {
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if (localScreenCapture) {
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this.stopLocalScreenSharingStream(localScreenCapture);
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localScreenCapture = null;
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}
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}
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})
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);
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this.userId = Connection.getUserId();
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this.initialise();
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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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//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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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): void {
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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 joins 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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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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//return this.createPeerConnection(user, localStream);
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} else {
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peerConnection.toClose = false;
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return null;
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}
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}
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const name = this.getName(user.userId);
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this.lastWebrtcUserName = user.webRtcUser;
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this.lastWebrtcPassword = user.webRtcPassword;
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const peer = new VideoPeer(user, user.initiator ? user.initiator : false, name, this.Connection);
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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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const streamResult = get(screenSharingLocalStreamStore);
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if (streamResult.type === "success" && streamResult.stream !== null) {
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this.sendLocalScreenSharingStreamToUser(user.userId, streamResult.stream);
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}
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});
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//Create a notification for first user in circle discussion
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if (this.PeerConnectionArray.size === 0) {
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mediaManager.createNotification(name);
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}
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this.PeerConnectionArray.set(user.userId, peer);
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peerStore.pushNewPeer(peer);
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return peer;
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}
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private getName(userId: number): string {
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return playersStore.getPlayerById(userId)?.name || "";
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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(
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user: UserSimplePeerInterface,
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stream: MediaStream | null
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): 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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// Enrich the user with last known credentials (if they are not set in the user object, which happens when a user triggers the screen sharing)
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if (user.webRtcUser === undefined) {
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user.webRtcUser = this.lastWebrtcUserName;
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user.webRtcPassword = this.lastWebrtcPassword;
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}
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const name = this.getName(user.userId);
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const peer = new ScreenSharingPeer(
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user,
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user.initiator ? user.initiator : false,
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name,
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this.Connection,
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stream
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);
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this.PeerScreenSharingConnectionArray.set(user.userId, peer);
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screenSharingPeerStore.pushNewPeer(peer);
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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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try {
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const peer = this.PeerConnectionArray.get(userId);
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if (peer === undefined) {
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console.warn(
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"closeConnection => Tried to close connection for user " + userId + " but could not find user"
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);
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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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const userIndex = this.Users.findIndex((user) => user.userId === userId);
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if (userIndex < 0) {
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throw "Couldn'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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//if user left discussion, clear array peer connection of sharing
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if (this.Users.length === 0) {
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for (const userId of this.PeerScreenSharingConnectionArray.keys()) {
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this.closeScreenSharingConnection(userId);
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this.PeerScreenSharingConnectionArray.delete(userId);
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screenSharingPeerStore.removePeer(userId);
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}
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}
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peerStore.removePeer(userId);
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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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const peer = this.PeerScreenSharingConnectionArray.get(userId);
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if (peer === undefined) {
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console.warn(
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"closeScreenSharingConnection => Tried to close connection for user " +
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userId +
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" but could not find user"
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);
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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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} 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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for (const unsubscriber of this.unsubscribers) {
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unsubscriber();
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}
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peerStore.cleanupStore();
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screenSharingPeerStore.cleanupStore();
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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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const uuid = playersStore.getPlayerById(data.userId)?.userUuid || "";
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if (blackListManager.isBlackListed(uuid)) return;
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const streamResult = get(screenSharingLocalStreamStore);
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let stream: MediaStream | null = null;
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if (streamResult.type === "success" && streamResult.stream !== null) {
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stream = streamResult.stream;
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}
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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, stream);
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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(
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'Could not find peer whose ID is "' + data.userId + '" in receiveWebrtcScreenSharingSignal'
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);
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console.info("Attempt to create new peer connection");
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if (stream) {
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this.sendLocalScreenSharingStreamToUser(data.userId, stream);
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}
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}
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} catch (e) {
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console.error(`receiveWebrtcSignal => ${data.userId}`, e);
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//Comment this peer connection because if we delete and try to reshare screen, the RTCPeerConnection send renegotiate event. This array will be remove when user left circle discussion
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this.receiveWebrtcScreenSharingSignal(data);
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}
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}
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private pushScreenSharingToRemoteUser(userId: number, localScreenCapture: MediaStream) {
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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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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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/**
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* Triggered locally when clicking on the screen sharing button
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*/
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public sendLocalScreenSharingStream(localScreenCapture: MediaStream) {
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for (const user of this.Users) {
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this.sendLocalScreenSharingStreamToUser(user.userId, localScreenCapture);
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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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private sendLocalScreenSharingStreamToUser(userId: number, localScreenCapture: MediaStream): void {
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const uuid = playersStore.getPlayerById(userId)?.userUuid || "";
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if (blackListManager.isBlackListed(uuid)) return;
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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, localScreenCapture);
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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(
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screenSharingUser,
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localScreenCapture
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);
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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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}
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}
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}
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