Setup web-socket connection

- Add authentification socket.io with jwt token

back/src/Controller/IoSocketController.ts

@@ -2,18 +2,35 @@ import socketIO = require('socket.io');
 import {Socket} from "socket.io";
 import * as http from "http";
 import {MessageUserPosition} from "@Model/Websocket/MessageUserPosition";
+import {ExSocketInterface} from "@Model/Websocket/ExSocketInterface";
+import Jwt, {JsonWebTokenError} from "jsonwebtoken";
+
+const SECRET_KEY = process.env.SECRET_KEY || "THECODINGMACHINE_SECRET_KEY";
 
 export class IoSocketController{
     Io: socketIO.Server;
     constructor(server : http.Server) {
         this.Io = socketIO(server);
+
+        //authentication with token. it will be decodes and stock in socket.
+        this.Io.use( (socket: Socket, next) => {
+            if (!socket.handshake.query || !socket.handshake.query.token) {
+                return next(new Error('Authentication error'));
+            }
+            Jwt.verify(socket.handshake.query.token, SECRET_KEY, (err: JsonWebTokenError, tokenDecoded: object) => {
+                if (err) {
+                    return next(new Error('Authentication error'));
+                }
+                (socket as ExSocketInterface).token = tokenDecoded;
+                next();
+            });
+        });
+
         this.ioConnection();
     }
 
     ioConnection() {
         this.Io.on('connection',  (socket: Socket) => {
-            //TODO check token access
-
             /*join-rom event permit to join one room.
                 message :
                     userId : user identification