Main timer logic, socketio server and backend endpoints

scoreboard/controllers/socketio.js

@@ -0,0 +1,7 @@
+const { Server } = require('socket.io');
+
+const io = new Server(3001, {
+    cors: { origin: "*" }
+  });
+
+module.exports = io

scoreboard/controllers/timer.js

@@ -0,0 +1,60 @@
+const moment = require('moment');
+const io = require('./socketio')
+
+let timerInterval;
+// let duration = moment.duration(7, 'minutes');        // Initial duration
+// let durationLeft = moment.duration(7, 'minutes');    // durationLeft after the timer has been started
+let duration = moment.duration(7, 'seconds');
+let durationLeft = moment.duration(10, 'seconds');
+
+let isPaused = true;                                    // Status of the timer
+
+// Function prototypes
+function start() {};
+function pause() {};
+function reset() {};
+function end() {};
+function print() {};
+
+
+function start() {
+    if(isPaused == true)
+    {
+        isPaused = false
+    
+        timerInterval = setInterval(() => {                     // Create Intervalfunction every 1000ms
+            console.log(print());                               // Print durationLeft
+            io.sockets.emit('timerDurationLeft', print())       // Emit durationLeft to all connected sockets
+            if(durationLeft.minutes() == 0 && durationLeft.seconds() == 0)      // End timer if durationLeft == 00:00
+                end()
+            durationLeft.subtract(1, 'second');                 // Subtract a second from from the timer
+        }, 1000);
+    }
+}
+
+function pause() {
+    isPaused = true;                                // Set status of the timer
+    clearInterval(timerInterval);                   // End the execution
+}
+
+function reset() {
+    durationLeft = duration.clone();                // Set durationLeft to the initial duration
+    io.sockets.emit('timerDurationLeft', print())   // Emit durationLeft to all connected sockets
+}
+
+function end() {
+    isPaused = true                                 // Set status of the timer
+    clearInterval(timerInterval);                   // End the execution
+    io.sockets.emit('timerEnded', print())          // Emit end to all connected sockets
+}
+
+function print()
+{
+    var minutes = (durationLeft.minutes() < 10) ? "0" + durationLeft.minutes() : durationLeft.minutes();        // Create leading zeros for numbers <10
+    var seconds = (durationLeft.seconds() < 10) ? "0" + durationLeft.seconds() : durationLeft.seconds();        // Create leading zeros for numbers <10
+    return minutes + ":" + seconds
+}
+
+module.exports = {
+    duration, durationLeft, isPaused, start, pause, reset, end, print
+};

scoreboard/routes/index.js

@@ -1,9 +1,26 @@
 var express = require('express');
 var router = express.Router();
+let io = require('../controllers/socketio')
+const timer = require('../controllers/timer')
+
+
+
 
 /* GET home page. */
 router.get('/', function(req, res, next) {
-  res.render('index', { title: 'Express' });
+  res.render('index', { durationLeft: timer.print()});
 });
 
+io.on('connection', (socket) => {
+  console.log("A user connected");
+  socket.emit("Hello user from server");
+
+  socket.on('message', (message) => {
+    console.log(message)
+  })
+
+
+})
+
+
 module.exports = router;