index.js

// include modules
var	express = require('express'),
	app = express(),
	server = require('http').createServer(app,{'transports': ['websocket', 'polling']}),
	io = require('socket.io')(server),
	fs = require('fs'),
	request = require('request'),
	path = require('path'),
	less = require('less-middleware'),
	spawn = require('child_process').spawn;
	
// include settings
var defaultsettingslocation = path.join(__dirname, 'stsettings.dist.js');
var settingslocation = path.join(__dirname, 'stsettings.js');
if (!fs.existsSync(settingslocation)) { // copy distribution settings if none are specified
	var defaultsettingsdata = fs.readFileSync(defaultsettingslocation).toString();
	fs.writeFileSync(settingslocation,defaultsettingsdata);
}
stsettings = fs.existsSync(settingslocation) ? require('./stsettings') : require('./stsettings.dist');
	
// setup basics
var settings = JSON.parse(JSON.stringify(stsettings));
var allprices = {
	prices: JSON.parse(JSON.stringify(settings.pricesdefault)),
	bidprices: JSON.parse(JSON.stringify(settings.pricesdefault)),
};
	
app.use(less(path.join(__dirname,'source','less'),{
	dest: path.join(__dirname, 'public'),
	options: {
		compiler: {
			compress: !settings.testmode,
		},
	},
	preprocess: {
		path: function(pathname, req) {
			return pathname.replace('/css/','/'); 
		},
		less : function(src, req){
			var varString = '';
			for (var key in settings.styles.files){
				if (!settings.styles.files.hasOwnProperty(key)) continue;
				varString += '@' + key + ':~"../' + settings.styles.files[key] + '";';
			}
			for (var key in settings.styles.colors){
				if (!settings.styles.colors.hasOwnProperty(key)) continue;
				varString += '@' + key + ':' + settings.styles.colors[key] + ';';
			}
			return varString + src;
		}
	},
	debug: settings.testmode,
	force: settings.testmode,
}));
// serve static content
//~ app.use(function (req, res, next) {
	//~ res.setHeader('Access-Control-Allow-Origin', "http://"+req.headers.host+':1337');
	//~ res.setHeader('Access-Control-Allow-Methods', 'GET, POST, OPTIONS, PUT, PATCH, DELETE');
	//~ res.setHeader('Access-Control-Allow-Headers', 'X-Requested-With,content-type');
	//~ next();
//~ });
app.use(express.static(path.join(__dirname, 'public')));

// server up main page
app.get('/',function(req,res){
	res.sendFile(__dirname + '/index.html');
});

// setup server
server.listen(1337,function(){
	if (stsettings.launchmidori) {
		var midori = spawn('midori',['-e','Fullscreen','-a','http://localhost:1337']);
		//~ var chromium = spawn('chromium-browser',['--kiosk','http://localhost:1337']);
	}
});

// creating a new websocket
io.on('connection',function(socket){
	
	var publicsettings = JSON.parse(JSON.stringify(settings));
	delete publicsettings.code;
	delete publicsettings.url;
	
	socket.emit('settings',publicsettings);
	socket.emit('pricesupdate',allprices);

	// update prices on an interval
	updateinterval();
	var updateintervalintv = setInterval(updateinterval,settings.pricesupdateinterval * 1000 * 60);
	function updateinterval() {
		
		if (settings.testmode) {
			var newprices = {"updated":1417533961,"updatedreadable":"Tue, 02 Dec 2014 15:26:01 +0000","prices":{"gold":38.47479,"palladium":25.72059,"platinum":39.06315,"silver":0.52599}};
			updateprices(newprices);
		} else {
			var url = settings.url;
			url += '&code='+encodeURIComponent(settings.code);
			request.get(url, function(error,response,body){
				if (error || response.statusCode != 200) return false;
				try {
					var newprices = JSON.parse(response.body);
					if ('error' in newprices) {
						throw new Error(newprices.error);
						return false;
					}
					updateprices(newprices);						
				} catch(e) { console.log(e); }
			});
		}
		
		function updateprices(newprices) { 
			allprices.updated = new Date(newprices.updated*1000);
			for (var i=0; i<settings.todisplay.length; i++) {
				var meas = settings.todisplay[i];
				for (var j in allprices.prices[meas]) {
					if (!allprices.prices[meas].hasOwnProperty(j)) continue;
					allprices.prices[meas][j] = (newprices.prices[j]*settings.gconvert[meas]+settings.pricemodifiers[j].fixed)*settings.pricemodifiers[j].ratio;
				}
				for (var j in allprices.bidprices[meas]) {
					if (!allprices.bidprices[meas].hasOwnProperty(j)) continue;
					allprices.bidprices[meas][j] = newprices.prices[j]*settings.gconvert[meas];
				}
			}
			socket.emit('pricesupdate',allprices);
		}
	}
});