server.js

var express = require('express');
var fs = require('fs');
var ini = require('ini');
var multiLine = require('multi-ini');
var bodyParser = require('body-parser');
var childProcess = require('child_process');
var basicAuth = require('basic-auth-connect');
var jsonfile = require('jsonfile');
var util = require('util');
var extend = require('node.extend');

var settings = require('./settings');

var username = settings.username;
var password = settings.password;

var sTrackerPath = buildSTrackerPath(settings.sTrackerPath);
var serverPath = buildServerPath(settings.serverPath);
var contentPath = buildContentPath(serverPath);

var isRunningOnWindows = /^win/.test(process.platform);

var acServerStatus = 0;
var sTrackerServerStatus = 0;
var acServerPid;
var sTrackerServerPid;
var acServerLogName;

var currentSession;
var modTyres;

try {
	var config =  multiLine.read(serverPath + 'cfg/server_cfg.ini', {encoding: 'utf8'});
	var entryList =  multiLine.read(serverPath + 'cfg/entry_list.ini', {encoding: 'utf8'});
	var ksTyres =  multiLine.read(serverPath + 'manager/ks_tyres.ini', {encoding: 'utf8'});
} catch (e) {
	console.log('Error - ' + e);
}

fs.exists(serverPath + 'manager/mod_tyres.ini', function (exists) {
	try {
		if (exists) {
			modTyres = ini.parse(fs.readFileSync(serverPath + 'manager/mod_tyres.ini', 'utf-8'));
		}
	} catch (e) {
		console.log('Error - ' + e);
	}
});

function saveConfig() {
	try {
		fs.writeFileSync(serverPath + 'cfg/server_cfg.ini', ini.stringify(config).replace(/\\/gi,''));
	} catch (e) {
		console.log('Error - ' + e);
	}
}

function saveEntryList() {
	try {
		fs.writeFileSync(serverPath + 'cfg/entry_list.ini', ini.stringify(entryList).replace(/\\/gi,''));
	} catch (e) {
		console.log('Error - ' + e);
	}
}

function getDirectories(srcpath) {
	try {
		return fs.readdirSync(srcpath).filter(function (file) {
			return fs.statSync(srcpath + "/" + file).isDirectory();
		});
	} catch (e) {
		console.log('Error - ' + e);
	}
}

function getDateTimeString() {
	try {
		var d = new Date();
		return d.getFullYear() + ('0' + d.getMonth()).slice(-2) + ('0' + d.getDate()).slice(-2) + '_' + ('0' + d.getHours()).slice(-2) + ('0' + d.getMinutes()).slice(-2) + ('0' + d.getSeconds()).slice(-2);
	} catch (e) {
		console.log('Error - ' + e);
	}
}

function writeLogFile(filename, message) {
	try {
		fs.appendFile(__dirname + '/logs/' + filename, message + '\r\n', function (err) {});
	} catch (e) {
		console.log('Error - ' + e);
	}	
}

function buildSTrackerPath(sTrackerPath) {
	if (sTrackerPath && sTrackerPath !== '') {
		if(sTrackerPath.substr(-1) !== '/'){
			sTrackerPath = sTrackerPath + '/';
		}
	}
	return sTrackerPath;
}

function buildServerPath(serverPath) {
	if(serverPath.substr(-1) !== '/'){
		serverPath = serverPath + '/';
	}
	return serverPath;
}

function buildContentPath(serverPath) {
	var contentPath = serverPath + 'content';
	if (settings.contentPath && settings.contentPath !== '') {
		contentPath = settings.contentPath;
		if(contentPath.substr(-1) === '/') {
			contentPath = contentPath.substring(0, contentPath.length - 1);
		}
	}
	return contentPath;
}

var app = express();
if (username !== '' && password !== '') {
	app.use(basicAuth(username, password));
}
app.use(bodyParser.json());
app.use(express.static(__dirname + '/frontend'));

// get complete configuration
app.get('/api', function (req, res) {
	try {
		res.status(200);
		res.send(config);
	} catch (e) {
		console.log('Error: GET/api - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get server config
app.get('/api/server', function (req, res) {
	try {
		res.status(200);
		res.send(config.SERVER);
	} catch (e) {
		console.log('Error: GET/api/server - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get server status
app.get('/api/server/status', function (req, res) {
	try {
		res.status(200);
		res.send({ session: currentSession });
	} catch (e) {
		console.log('Error: GET/api/server/status - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get server config by id
app.get('/api/server/:id', function (req, res) {
	try {
		res.status(200);
		res.send({ value: config.SERVER[req.params.id.toUpperCase()] });
	} catch (e) {
		console.log('Error: GET/api/server/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post new server config
app.post('/api/server', function (req, res) {
	try {
		for (var param in req.body) {
			config.SERVER[param.toUpperCase()] = req.body[param];
		}
		
		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/server - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post server config by id
app.post('/api/server/:id', function (req, res) {
	try {
		config.SERVER[req.params.id.toUpperCase()] = req.body.value;
		saveConfig();
		res.status(200);
		res.send('OK');
	}
	catch (e) {
		console.log('Error: POST/api/server/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get booking config
app.get('/api/book', function (req, res) {
	try {
		res.status(200);
		res.send(config.BOOK);
	} catch (e) {
		console.log('Error: GET/api/book - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get booking config by id
app.get('/api/book/:id', function (req, res) {
	try {
		res.status(200);
		res.send(config.BOOK[req.params.id.toUpperCase()]);
	} catch (e) {
		console.log('Error: GET/api/book/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post new booking config
app.post('/api/book', function (req, res) {
	try {
		if (!Object.keys(req.body).length) {
			if (config.BOOK) {
				delete config.BOOK;
			}
		} else {
			if (config.BOOK === undefined) {
				config.BOOK = {};
			}
			for (var param in req.body) {
				config.BOOK[param.toUpperCase()] = req.body[param];
			}
		}

		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/book/ - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post booking config by id
app.post('/api/book/:id', function (req, res) {
	try {
		config.BOOK[req.params.id.toUpperCase()] = req.body.value;
		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/book/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get practice config
app.get('/api/practice', function (req, res) {
	try {
		res.status(200);
		res.send(config.PRACTICE);
	} catch (e) {
		console.log('Error: GET/api/practice - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get practice config by id
app.get('/api/practice/:id', function (req, res) {
	try {
		res.status(200);
		res.send(config.PRACTICE[req.params.id.toUpperCase()]);
	} catch (e) {
		console.log('Error: GET/api/practice/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post new practice config
app.post('/api/practice', function (req, res) {
	try {
		if (!Object.keys(req.body).length) {
			if (config.PRACTICE) {
				delete config.PRACTICE;
			}
		} else {
			if (config.PRACTICE === undefined) {
				config.PRACTICE = {};
			}
			for (var param in req.body) {
				config.PRACTICE[param.toUpperCase()] = req.body[param];
			}
		}

		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/practice - ' + e);
		res.status(500);
		res.send('Application error');
	}

});

// post practice config by id
app.post('/api/practice/:id', function (req, res) {
	try {
		config.PRACTICE[req.params.id.toUpperCase()] = req.body.value;
		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/practice/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get qualify config
app.get('/api/qualify', function (req, res) {
	try {
		res.send(config.QUALIFY);
	} catch (e) {
		console.log('Error: GET/api/qualify - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get qualify config by id
app.get('/api/qualify/:id', function (req, res) {
	try {
		res.status(200);
		res.send(config.QUALIFY[req.params.id.toUpperCase()]);
	} catch (e) {
		console.log('Error: GET/api/qualify/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}

});

// post new qualify config
app.post('/api/qualify', function (req, res) {
	try {
		if (!Object.keys(req.body).length) {
			if (config.QUALIFY) {
				delete config.QUALIFY;
			}
		} else {
			if (config.QUALIFY === undefined) {
				config.QUALIFY = {};
			}
			for (var param in req.body) {
				config.QUALIFY[param.toUpperCase()] = req.body[param];
			}
		}

		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/qualify - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post qualify config
app.post('/api/qualify/:id', function (req, res) {
	try {
		config.QUALIFY[req.params.id.toUpperCase()] = req.body.value;
		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/qualify/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get race config
app.get('/api/race', function (req, res) {
	try {
		res.status(200);
		res.send(config.RACE);
	} catch (e) {
		console.log('Error: GET/api/race - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get race config by id
app.get('/api/race/:id', function (req, res) {
	try {
		res.send(config.RACE[req.params.id.toUpperCase()]);
	} catch (e) {
		console.log('Error: GET/api/race/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post new race config
app.post('/api/race', function (req, res) {
	try {
		if (!Object.keys(req.body).length) {
			if (config.RACE) {
				delete config.RACE;
			}
		} else {
			if (config.RACE === undefined) {
				config.RACE = {};
			}
			for (var param in req.body) {
				config.RACE[param.toUpperCase()] = req.body[param];
			}
		}

		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/race - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post race config by id
app.post('/api/race/:id', function (req, res) {
	try {
		config.RACE[req.params.id.toUpperCase()] = req.body.value;
		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/race/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get dynamictrack config
app.get('/api/dynamictrack', function (req, res) {
	try {
		res.status(200);
		res.send(config.DYNAMIC_TRACK);
	} catch (e) {
		console.log('Error: GET/api/dynamictrack - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get dynamictrack config by id
app.get('/api/dynamictrack/:id', function (req, res) {
	try {
		res.status(200);
		res.send(config.DYNAMIC_TRACK[req.params.id.toUpperCase()]);
	} catch (e) {
		console.log('Error: GET/api/dynamictrack/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post dynamictrack config
app.post('/api/dynamictrack', function (req, res) {
	try {
		if (!Object.keys(req.body).length) {
			if (config.DYNAMIC_TRACK) {
				delete config.DYNAMIC_TRACK;
			}
		} else {
			if (config.DYNAMIC_TRACK === undefined) {
				config.DYNAMIC_TRACK = {};
			}
			for (var param in req.body) {
				config.DYNAMIC_TRACK[param.toUpperCase()] = req.body[param];
			}
		}

		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/dynamictrack - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post track dynamictrack config by id
app.post('/api/dynamictrack/:id', function (req, res) {
	try {
		config.DYNAMIC_TRACK[req.params.id.toUpperCase()] = req.body.value;
		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/dynamictrack/:id - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get weather config
app.get('/api/weather', function (req, res) {
	try {
		var weather = [];

		Object.keys(config).forEach(function (key) {
			if (key.indexOf("WEATHER_") === 0) {
				weather.push(config[key]);
			}
		});

		res.status(200);
		res.send(weather);
	} catch (e) {
		console.log('Error: GET/api/weather - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post weather config
app.post('/api/weather', function (req, res) {
	try {
		Object.keys(config).forEach(function (key) {
			if (key.indexOf("WEATHER_") === 0) {
				delete config[key];
			}
		});

		for (var param in req.body) {
			config['WEATHER_' + param] = req.body[param];
		}

		saveConfig();
		res.status(200);
		res.send('OK');
	} catch (e) {
		console.log('Error: POST/api/weather - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get tracks available on server
app.get('/api/tracks', function (req, res) {
	try {
		var trackNames = fs.readdirSync(contentPath + "/tracks");
		var tracks = [];

		for (var trackName in trackNames) {
			var track = {
				name: trackNames[trackName]
			};

			try {
				var configs = getDirectories(contentPath + "/tracks/" + trackNames[trackName] + "/ui");
				track.configs = configs;
			}
			catch (e) {
				//console.log(e);
			}

			tracks.push(track);
		}

		res.status(200);
		res.send(tracks);
	} catch (e) {
		console.log('Error: GET/api/tracks - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get track
app.get('/api/tracks/:track', function (req, res) {
	try {
		var trackDetails = fs.readFileSync(contentPath + '/tracks/' + req.params.track + '/ui/ui_track.json', 'utf-8');
		res.status(200);
		res.send(trackDetails);
	} catch (e) {
		console.log('Error: GET/api/tracks/:track - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get track image
app.get('/api/tracks/:track/image', function (req, res) {
	try {
		res.status(200);;
		var image = fs.readFileSync(contentPath + '/tracks/' + req.params.track + '/ui/preview.png');
		res.contentType('image/jpeg');
		res.send(image);
	} catch (e) {
		console.log('Error: GET/api/tracks/:track/image - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get track config
app.get('/api/tracks/:track/:config', function (req, res) {
	try {
		var trackDetails = fs.readFileSync(contentPath + '/tracks/' + req.params.track + '/ui/' + req.params.config + '/ui_track.json', 'utf-8');
		res.status(200);
		res.send(trackDetails);
	} catch (e) {
		console.log('Error: GET/api/tracks/:track/:config - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get track config image
app.get('/api/tracks/:track/:config/image', function (req, res) {
	try {
		res.status(200);;
		var image = fs.readFileSync(contentPath + '/tracks/' + req.params.track + '/ui/' + req.params.config + '/preview.png');
		res.contentType('image/jpeg');
		res.send(image);
	} catch (e) {
		console.log('Error: GET/api/tracks/:track/:config/image - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get cars available on server
app.get('/api/cars', function (req, res) {
	try {
		var cars = fs.readdirSync(contentPath + "/cars");
		res.status(200);
		res.send(cars);
	} catch (e) {
		console.log('Error: GET/api/cars - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get car skin
app.get('/api/cars/:car', function (req, res) {
	try {
		var skins = {}
		try {
			var skins = fs.readdirSync(contentPath + "/cars/" + req.params.car + "/skins");
		}
		catch (e) {
			console.log("Car not found: " + req.params.car);
		}

		res.status(200);
		res.send({ skins: skins });
	} catch (e) {
		console.log('Error: GET/api/cars/:car - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get entry list
app.get('/api/entrylist', function (req, res) {
	try {
		res.status(200);
		res.send(entryList);
	} catch (e) {
		console.log('Error: GET/api/entrylist - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post entry list
app.post('/api/entrylist', function (req, res) {
	try {
		var newEntryList = {};

		for (var param in req.body) {
			newEntryList[param.toUpperCase()] = req.body[param];
		}
		entryList = newEntryList;
		saveEntryList();
	}
	catch (e) {
		console.log("Failed to save entry list");
		res.status(500);
		res.send("Failed to save entry list")
	}

	res.status(200);
	res.send('OK');
});

// get drivers
app.get('/api/drivers', function (req, res) {
	try {
		var drivers = [];

		jsonfile.readFile(__dirname + '/drivers.json', function (err, data) {
			if (!err) {
				drivers = data;
			}

			res.status(200);
			res.send(drivers)
		});
	}
	catch (e) {
		console.log("Failed to retrieve drivers");
		res.status(500);
		res.send("Failed to retrieve drivers");
	}
});

// post drivers
app.post('/api/drivers', function (req, res) {
	try {
		var drivers = [];
		var driver = {};
		for (var param in req.body) {
			driver[param.toUpperCase()] = req.body[param];
		}

		jsonfile.readFile(__dirname + '/drivers.json', function (err, data) {
			if (!err) {
				drivers = data;
			}

			drivers.push(driver);

			jsonfile.writeFile(__dirname + '/drivers.json', drivers, function (err) {
				if (err) {
					console.error(err);
					throw err;
				}
			});
		});
	}
	catch (e) {
		console.log("Failed to save drivers");
		res.status(500);
		res.send("Failed to save drivers");
	}

	res.status(200);
	res.send('OK');
});

// delete driver by guid
app.delete('/api/drivers/:guid', function (req, res) {
	try {
		var guid = req.params.guid;
		if (!guid) {
			throw "GUID not provided";
		}

		jsonfile.readFile(__dirname + '/drivers.json', function (err, data) {
			if (err) {
				throw err;
			}

			var found = data.filter(function (item) {
				return item.GUID == guid;
			});

			if (found) {
				for (i = 0; i < found.length; i++) {
					data.splice(data.indexOf(found[i]), 1);
				}

				jsonfile.writeFile(__dirname + '/drivers.json', data, function (err) {
					if (err) {
						console.error(err);
						throw err;
					}
				});
			}
		});
	}
	catch (e) {
		console.log('Error: DELETE/api/drivers - ' + e);
		res.status(500);
		res.send("Failed to delete driver");
		return;
	}

	res.status(200);
	res.send('OK');
});

// get tyres for cars
app.get('/api/tyres', function (req, res) {
	try {
		var result = ksTyres;
		if (modTyres) {
			result = extend(ksTyres, modTyres)
		}

		if (req.query.cars) {
			var cars = req.query.cars.split(',');
			var filtered = {};
			for (var car in cars) {
				if (result[cars[car]]) {
					filtered[cars[car]] = result[cars[car]];
				}
			}
			result = filtered;
		}

		res.status(200);
		res.send(result)
	}
	catch (e) {
		console.log("Failed to retrieve tyres");
		res.status(500);
		res.send("Failed to retrieve tyres");
	}
});

// get acserver status
app.get('/api/acserver/status', function (req, res) {
	try {
		res.status(200);
		res.send({ status: acServerStatus });
	} catch (e) {
		console.log('Error: GET/api/acserver/status - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// start acserver process
app.post('/api/acserver', function (req, res) {
	try {
		console.log("OS is " + process.platform);
		var acServer = undefined;

		if (isRunningOnWindows) {
			console.log("Starting Windows Server");
			acServer = childProcess.spawn('acServer.exe', { cwd: serverPath });
		} else {
			console.log("Starting Linux Server");
			acServer = childProcess.spawn('./acServer', { cwd: serverPath });
		}
		acServerPid = acServer.pid;
		acServerLogName = getDateTimeString() + '_log.txt';

		acServer.stdout.on('data', function (data) {
			if (acServerStatus === 0) {
				acServerStatus = -1;
			}

			var dataString = String(data);

			if (dataString.indexOf('OK') !== -1) {
				acServerStatus = 1;
			}
			
		   if (dataString.indexOf('stracker has been restarted') !== -1) {
				sTrackerServerStatus = 1
			}

			if (dataString.indexOf('PAGE: /ENTRY') === -1) {
				//Log to console and file
				console.log(dataString);
				writeLogFile('server_' + acServerLogName, getDateTimeString() + ': ' + data);

				//Set current session
				if (dataString.indexOf('session name') !== -1) {
					var session = dataString.substr(dataString.indexOf('session name :') + 14);
					currentSession = session.substr(0, dataString.indexOf('\n')).trim();
				}
			}

		});
		acServer.stderr.on('data', function (data) {
			console.log('stderr: ' + data);
			writeLogFile('error_' + acServerLogName, getDateTimeString() + ': ' + data);
		});
		acServer.on('close', function (code) {
			console.log('closing code: ' + code);
		});
		acServer.on('exit', function (code) {
			console.log('exit code: ' + code);
			acServerStatus = 0;
		});

		res.status(200);
		res.send("OK");
	} catch (e) {
		console.log('Error: POST/api/acserver - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post stop ac server
app.post('/api/acserver/stop', function (req, res) {
	try {
		if (acServerPid) {
			if (isRunningOnWindows) {
				console.log("Stopping Windows Server");
				childProcess.spawn("taskkill", ["/pid", acServerPid, '/f', '/t']);
			} else {
				console.log("Stopping Linux Server");
				childProcess.spawn("kill", [acServerPid]);
			}

			acServerPid = undefined;
			acServerLogName = undefined;
		}

		res.status(200);
		res.send("OK");
	} catch (e) {
		console.log('Error: POST/api/acserver/stop - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// get stracker server status
app.get('/api/strackerserver/status', function (req, res) {
	try {
		res.status(200);
		res.send({ status: sTrackerPath === '' ? -2 : sTrackerServerStatus });
	} catch (e) {
		console.log('Error: GET/api/strackerserver/status - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post start stracker server
app.post('/api/strackerserver', function (req, res) {
	try {
		var sTracker = childProcess.spawn('stracker.exe', ['--stracker_ini', 'stracker.ini'], { cwd: sTrackerPath });
		sTrackerServerPid = sTracker.pid;
		
		if (sTrackerServerStatus == 0) {
			sTrackerServerStatus = -1;
		}

		sTracker.stdout.on('data', function (data) {
			console.log(data);
		});
		sTracker.stderr.on('data', function (data) {
			console.log('stderr: ' + data);
		});
		sTracker.on('close', function (code) {
			console.log('closing code: ' + code);
		});
		sTracker.on('exit', function (code) {
			console.log('exit code: ' + code);
			sTrackerServerStatus = 0;
		});

		res.status(200);
		res.send("OK");
	} catch (e) {
		console.log('Error: POST/api/strackerserver - ' + e);
		res.status(500);
		res.send('Application error');
	}
});

// post stop stracker server
app.post('/api/strackerserver/stop', function (req, res) {
	try {
		if (sTrackerServerPid) {
			childProcess.spawn("taskkill", ["/pid", sTrackerServerPid, '/f', '/t']);
			sTrackerServerPid = undefined;
		}

		res.status(200);
		res.send("OK");
	} catch (e) {
		console.log('Error: POST/api/strackerserver/stop - ' + e);
		res.status(500);
		res.send('Application error');
	}
});


// get fronend index page
app.get('*', function (req, res) {
	res.sendFile(__dirname + '/frontend/index.html');
});

// server port node.js
app.listen(settings.port);