feat: added socketio to server

package.json

@@ -12,10 +12,12 @@
   "dependencies": {
     "@tensorflow-models/coco-ssd": "^2.2.1",
     "@tensorflow/tfjs": "^2.8.2",
-    "express": "^4.17.1"
+    "express": "^4.17.1",
+    "socket.io": "^3.1.0"
   },
   "devDependencies": {
     "@types/express": "^4.17.11",
+    "@types/socket.io": "^2.1.12",
     "ts-loader": "^8.0.13",
     "typescript": "^4.1.3",
     "webpack": "^5.11.1",

src/Server/EventManager.ts

@@ -0,0 +1,26 @@
+import { EventEmitter } from 'events'
+import IEventManager from './Interfaces/IEventManager'
+
+let instance: EventManager | null = null
+
+class EventManager implements IEventManager {
+  eventEmitter: EventEmitter
+
+  constructor () {
+    if (!instance) instance = this
+
+    this.eventEmitter = new EventEmitter()
+
+    return instance
+  }
+
+  listen = (eventName: string, callback: any)  => {
+    this.eventEmitter.addListener(eventName, callback)
+  }
+
+  emit = (eventName: string, detail: any) => {
+    this.eventEmitter.emit(eventName, detail)
+  }
+}
+
+export default EventManager

src/Server/Interfaces/IEventManager.ts

@@ -0,0 +1,6 @@
+interface IEventManager {
+  listen(eventName: string, callback: any): void,
+  emit(eventName: string, detail: any): void
+}
+
+export default IEventManager

src/Server/Server.ts

@@ -1,25 +1,31 @@
 import express from 'express'
 import path from 'path'
 import bodyParser from 'body-parser'
+import http from 'http'
+import { Socket } from 'socket.io'
+import IEventManager from './Interfaces/IEventManager'
+import EventManager from './EventManager'
 
 class Server {
   public app = express()
+  private eventManager: IEventManager
 
-  constructor () {
+  constructor (port: number) {
     this.createApp()
     this.setupAppOptions()
     this.setupAppRoutes()
+    this.startServer(port)
+    this.eventManager = new EventManager()
   }
 
   createApp = () => {
     this.app.use(express.json())
     this.app.use(express.urlencoded({ extended: false }))
-    this.app.use(express.static(path.join(process.cwd(), '/build')))
+    this.app.use(express.static(path.join(process.cwd(), '/dist/Vision/')))
     this.app.use(bodyParser.json())
   }
 
   setupAppRoutes = () => {
-    // this.app.use('/api', apiRouter)
     this.app.use('/', (request, response, next) => {
       response.sendFile(path.join(process.cwd(), './dist/Vision/index.html'))
     })
@@ -33,6 +39,31 @@ class Server {
       next()
     })
   }
+
+  startServer = (port: number) => {
+    const webService = new http.Server(this.app)
+    const socketService = require("socket.io")(webService)
+    this.openSockets(socketService)
+    webService.listen(port, () => {
+      console.log(`Server is listening on ${port}`)
+    })
+  }
+
+  openSockets = (socketService: any) => {
+    socketService.on('connection', () => {
+      console.log('client connected')
+    })
+
+    socketService.on('message', (message: any) => {
+      console.log(message)
+    })
+  }
+
+  public onReceiveOffsets = (offsets: any[]) => {
+    this.eventManager.emit('onReceiveOffsets', offsets)
+
+  }
+
 }
 
 export default Server

src/Server/main.ts

@@ -1,29 +1,24 @@
-import http from 'http'
 import Server from './Server'
 
+import EventManager from './EventManager'
+import IEventManager from './Interfaces/IEventManager';
+
+
+function sleep (ms: number) {
+  return new Promise(resolve => setTimeout(resolve, ms));
+}
+
 const main = () => {
+  console.log('starting')
+  const port = 5005
+  const server = new Server(port)
+  const eventManager: IEventManager = new EventManager()
 
-  const port = normalizePort(process.env.PORT || '5005')
-  const webService = createServer()
-
-  webService.listen(port, () => {
-    console.log(`Server is listening on ${port}`)
+  eventManager.listen('onReceiveOffsets', (offsets: unknown[]) => {
+    console.log(offsets)
   })
 }
 
-const createServer = () => {
-  const server = new Server()
-  return http.createServer(server.app)
-}
-
-const normalizePort = (portString: string) => {
-  const port = parseInt(portString, 10)
-
-  if (isNaN(port)) return portString
-  else if (port >= 0 ) return port
-  else return 0
-}
-
 main()
 
-export { main, createServer, normalizePort }
+export { main }