repl.it
@amasad/

90s chat

Nodejs

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Files
  • index.js
  • public
  • Packager files
  • package-lock.json
index.js
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// Setup basic express server
var express = require('express');
var app = express();
var path = require('path');
var server = require('http').createServer(app);
var io = require('socket.io')(server);
var port = process.env.PORT || 3000;

server.listen(port, function() {
	console.log('Server listening at port %d', port);
});

console.log('here');
// Routing
app.use(express.static(path.join(__dirname, 'public')));

var numUsers = 0;

io.on('connection', function(socket) {
	var addedUser = false;

	// when the client emits 'new message', this listens and executes
	socket.on('new message', function(data) {
		// we tell the client to execute 'new message'
		socket.broadcast.emit('new message', {
			username: socket.username,
			message: data
		});
	});

	// when the client emits 'add user', this listens and executes
	socket.on('add user', function(username) {
		if (addedUser) return;

		// we store the username in the socket session for this client
		socket.username = username;
		++numUsers;
		addedUser = true;
		socket.emit('login', {
			numUsers: numUsers
		});
		// echo globally (all clients) that a person has connected
		socket.broadcast.emit('user joined', {
			username: socket.username,
			numUsers: numUsers
		});
	});

	// when the client emits 'typing', we broadcast it to others
	socket.on('typing', function() {
		socket.broadcast.emit('typing', {
			username: socket.username
		});
	});

	// when the client emits 'stop typing', we broadcast it to others
	socket.on('stop typing', function() {
		socket.broadcast.emit('stop typing', {
			username: socket.username
		});
	});

	// when the user disconnects.. perform this
	socket.on('disconnect', function() {
		if (addedUser) {
			--numUsers;

			// echo globally that this client has left
			socket.broadcast.emit('user left', {
				username: socket.username,
				numUsers: numUsers
			});
		}
	});
});