apply everything to ts; add temp layout

src/WebsocketApp.ts

@@ -0,0 +1,77 @@
+import express from 'express';
+import morgan from "morgan";
+import debug from "debug";
+import expressWs from "express-ws";
+import http from "http";
+
+export class WebsocketApp {
+    get app(): express.Application {
+        return this._app;
+    }
+
+    private readonly _app: express.Application;
+    private readonly _server;
+
+    static port = 3005;
+
+    private log = debug("itender:websocket-app");
+
+    constructor() {
+        this._app = express();
+        this._server = http.createServer(this._app);
+        expressWs(this._app, this._server);
+
+        this._app.use(morgan('dev'));
+        this._app.use(express.json());
+        this._app.use(express.urlencoded({extended: false}));
+
+        this._app.set('trust proxy', 0);
+
+        this._app.use((err, req, res, next) => {
+            res.status(err.status || 500);
+            res.render('error');
+            this.log("Error " + err);
+        });
+
+        this._app.set("port", WebsocketApp.port);
+
+    }
+
+    public loadRoutes( ) : void
+    {
+
+    }
+
+    public listen(): Promise<void> {
+        return new Promise((resolve, reject) => {
+            this._server.on('error', (error) => {
+                if (error.syscall != 'listen') {
+                    reject();
+                    return;
+                }
+
+                let bind = 'Port ' + WebsocketApp.port;
+
+                // handle specific listen errors with friendly messages
+                switch (error.code) {
+                    case 'EACCES':
+                        reject(bind + ' requires elevated privileges');
+                        break;
+                    case 'EADDRINUSE':
+                        reject(bind + ' is already in use');
+                        break;
+                    default:
+                        reject();
+                }
+
+            });
+            this._server.on('listening', () => {
+                let addr = this._server.address();
+                this.log("Listening on " + addr.port);
+                resolve();
+            })
+            this._server.listen(WebsocketApp.port);
+        });
+    }
+}
+