var express = require('express'); var fs = require('fs'); var io = require('socket.io'); var crypto = require('crypto');

var app = express.createServer(); var staticDir = express.static;

io = io.listen(app);

var opts = {

port: 1948,
baseDir : __dirname + '/../../'

};

io.sockets.on('connection', function(socket) {

socket.on('slidechanged', function(slideData) {
        if (typeof slideData.secret == 'undefined' || slideData.secret == null || slideData.secret === '') return;
        if (createHash(slideData.secret) === slideData.socketId) {
                slideData.secret = null;
                socket.broadcast.emit(slideData.socketId, slideData);
        };
});

});

app.configure(function() {

[ 'css', 'js', 'plugin', 'lib' ].forEach(function(dir) {
        app.use('/' + dir, staticDir(opts.baseDir + dir));
});

});

app.get(“/”, function(req, res) {

res.writeHead(200, {'Content-Type': 'text/html'});
fs.createReadStream(opts.baseDir + '/index.html').pipe(res);

});

app.get(“/token”, function(req,res) {

var ts = new Date().getTime();
var rand = Math.floor(Math.random()*9999999);
var secret = ts.toString() + rand.toString();
res.send({secret: secret, socketId: createHash(secret)});

});

var createHash = function(secret) {

var cipher = crypto.createCipher('blowfish', secret);
return(cipher.final('hex'));

};

// Actually listen app.listen(opts.port || null);

var brown = '033[33m',

green = '\033[32m',
reset = '\033[0m';

console.log( brown + “reveal.js:” + reset + “ Multiplex running on port ” + green + opts.port + reset );