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var http = require('http');
var express = require('express');
var fs = require('fs');
var io = require('socket.io');
var crypto = require('crypto');
var app = express();
var staticDir = express.static;
var server = http.createServer(app);
io = io(server);
var opts = {
port: process.env.PORT || 1948,
baseDir: __dirname + '/../../'
};
io.on('connection', function (socket) {
socket.on('multiplex-statechanged', function (data) {
if (typeof data.secret == 'undefined' || data.secret == null || data.secret === '') return;
if (createHash(data.secret) === data.socketId) {
data.secret = null;
socket.broadcast.emit(data.socketId, data);
}
});
});
['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'});
var stream = fs.createReadStream(opts.baseDir + '/index.html');
stream.on('error', function (error) {
res.write('<style>body{font-family: sans-serif;}</style><h2>reveal.js multiplex server.</h2><a href="/token">Generate token</a>');
res.end();
});
stream.on('readable', function () {
stream.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
server.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);
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