const express = require('express');
const app = express();
const http = require('http');
const server = http.createServer(app);
const { Server } = require("socket.io");
const io = new Server(server);

app.use(express.static('public'));

io.on('connection', (socket) => {          
	console.log('a user connected');            //console log if a user connceted
	
	socket.on('picture', (line) => {            //if the message "picture" comes it will do this function. the message is called line
		console.log(line);                      //logs the incoming message called line
		socket.broadcast.emit("dingdong",line); //it broadcasts it to the other connected clients https://socket.io/docs/v4/tutorial/step-5
	});

	socket.on('disconnect', () => {
		console.log('user disconnected');
	});
});

server.listen(3000, () => {                     //if you would like to change the port change the number        
	console.log('listening on *:3000');
});