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@dtrenz
Created March 19, 2014 21:51
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Example node + socket.io chat app using express.
#!/usr/bin/env node
var express = require('express');
var app = express();
var server_port = process.env.PORT || 5000;
var server = require('http').createServer(app);
var io = require('socket.io').listen(server);
var users = {};
server.listen(server_port);
console.log('###Express server listening on port %d', server_port);
app.use(express.static(__dirname + '/'));
io.sockets.on('connection', function(socket) {
socket.on('set nickname', function(nickname) {
user = getUserByNick(nickname);
if (user) {
socket.emit('ready', { id: user.id } );
} else {
user = registerUser(nickname, socket.id);
}
socket.set('nickname', user.nickname, function() {
socket.set('userID', user.id, function() {
socket.emit('ready', { id: user.id } );
});
});
});
socket.on('update visible users', function(users) {
for (var i in users) {
socket.join(users[i]);
}
});
socket.on('msg', function(msg) {
socket.get('nickname', function(err, nickname) {
var user = users[nickname];
if (user) {
socket.broadcast.to(user.id).emit('chat update', { nickname: user.nickname, text: msg });
}
});
});
});
function getUserByNick(nickname) {
return users[nickname];
}
function registerUser(nickname, socketID) {
if (users[nickname] == undefined) {
var userId = Object.keys(users).length + 100;
users[nickname] = {
id: userId,
nickname: nickname,
socketId: socketID
};
}
return users[nickname];
}
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