server.js

var config = require('./config/config');
var staticServer = require('node-static'); // github.com/bign8/node-static
var fileServer = new(staticServer.Server)('./www'); // create server

// Create web server
var webServer = require('http').createServer(function(req, res) {
	fileServer.serve(req, res);
}).listen(config.system_port);

// Create socket server
var io = require('socket.io').listen(webServer, { // github.com/LearnBoost/Socket.IO/wiki/Configuring-Socket.IO
	'log level': (config.is_production) ? 1 : 2,
	'browser client minification': true,
	'browser client etag': true,
	'browser client gzip': false, // wierd kill error
	'transports': ['websocket', 'flashsocket', 'htmlfile', 'xhr-polling', 'jsonp-polling'],
	'heartbeat interval': 25, // this and following are defaults, testing error
	'heartbeats': true
});

// Start subClients of sockets - move to other areas once better understood
var admin = io.of('/admin');
var client = io.of('/client');

// combine and/or remove some of the below objects if possible
//var clients = {}; // list of connected clients, by socketID
var uniqueClients = {}; // list of connected clients, by GUID with prettyNum
var screens = {}; // list of connected screen sizes, by socketID
var admins  = {}; // list of connected admins

// Client settings
var prettyNum = 1;
var settings = {
	'active': true,
	'ballCount': 5,
	'maxSpeed': 4,
	'adminNumbers': false,
	'refreshRate': 15,
	'prettyNum': '...',
	'appGUID': undefined
};

client.on('connection', function(clientSocket) {
	// List of live connected clients - http://bit.ly/13mp9cO
	//clients[clientSocket.id] = clientSocket;
	clientSocket.on('disconnect', function() {
		//delete clients[clientSocket.id];
		delete screens[clientSocket.id];
		admin.emit('leaveScreen', clientSocket.id);
	});
	
	clientSocket.on('resetSize', function(screen) {
		// this information now includes GUID - use unique clients object instead of screens
		screens[clientSocket.id] = screen;
		screen.id = clientSocket.id;
		admin.emit('resizeFrame', screen);
	});

	// can re-assign GUID or just properly classify a new client
	clientSocket.on('checkGUID', function(GUID, fn){
		var tempNum;
		if (GUID != undefined && Object.keys(uniqueClients).indexOf(GUID) > -1) {
			tempNum = uniqueClients[GUID].prettyNum; // assert prettyNum
		} else {
			GUID = uniqueGUID(Object.keys(uniqueClients)); // Generate new GUID
			uniqueClients[GUID] = clientSocket;
			tempNum = uniqueClients[GUID].prettyNum = prettyNum++;
		}
		fn({'GUID':GUID, 'prettyNum': tempNum});
	});

	clientSocket.emit('assignSettings', settings);
});
admin.on('connection', function(adminSocket) {
	// list of live connected admins - http://bit.ly/13mp9cO
	admins[adminSocket.id] = adminSocket;
	adminSocket.on('disconnect', function() {
		delete admins[adminSocket.id];
	});
	console.log('Number of admins: ' + Object.keys(admins).length);
	
	adminSocket.on('setSettings', function(newSettings, fn) {
		settings = newSettings;
		client.emit('assignSettings', newSettings);
		admin.emit('updateSettings', newSettings); // update all admins
	});

	adminSocket.on('loadSettings', function(undefined, fn) {
		fn(settings);
	});

	// this may need to be modified
	adminSocket.emit('loadScreens', screens);
	
	/*adminSocket.on('setState', function(state) {
		console.log(state);
		client.socket(state.id).emit('setState', state)
	});//*/
});

// Show that things have begun
console.log('Application listening on http://' + (config.system_server || '*') + ":" + config.system_port + ".");

// Using GUID's to identify clients and points
function s4() {
	return Math.floor((1 + Math.random()) * 0x10000).toString(16).substring(1);
};
function uniqueGUID(list) {
	var GUID;
	do {
		GUID = s4() + s4() + '-' + s4() + '-' + s4() + '-' + s4() + '-' + s4() + s4() + s4();
	} while ( list.indexOf(GUID) > -1 );
	return GUID;
}