Removing the Message class and merging it with MessageUserPosition (since it is only ever used it in MessageUserPosition)

Taking advantage of the TypeScript Constructor Assignment too to reduce the amount of code!

back/src/Model/Websocket/Message.ts

@@ -1,15 +0,0 @@
-export class Message {
-    userId: string;
-    name: string;
-    character: string;
-
-    constructor(data: any) {
-        if (!data.userId) {
-            console.error("Got invalid message", data);
-            throw Error("userId cannot be null");
-        }
-        this.userId = data.userId;
-        this.name = data.name;
-        this.character = data.character;
-    }
-}

back/src/Model/Websocket/MessageUserPosition.ts

@@ -2,25 +2,11 @@ import {Message} from "./Message";
 import {PointInterface} from "./PointInterface";
 
 export class Point implements PointInterface{
-    x: number;
-    y: number;
-    direction: string;
-
-    constructor(x : number, y : number, direction : string = "none") {
-        if(x === null || y === null){
-            throw Error("position x and y cannot be null");
-        }
-        this.x = x;
-        this.y = y;
-        this.direction = direction;
+    constructor(public x : number, public y : number, public direction : string = "none") {
     }
 }
 
-export class MessageUserPosition extends Message{
-    position: PointInterface;
-
-    constructor(message: any) {
-        super(message);
-        this.position = new Point(message.position.x, message.position.y, message.position.direction);
+export class MessageUserPosition {
+    constructor(public userId: string, public name: string, public character: string, public position: PointInterface) {
     }
 }