app.js

var express = require('express'),
	i18n = require('i18n'),
	request = require('request'),
	commit = null,
	moment = require('moment'),
	fs = require('fs');

var app = express();

i18n.configure({
	locales:[
		'en',
		'bg',
		'de',
		'eo',
		'es',
		'fr',
		'it',
		'ja',
		'nb',
		'nl',
		'pl',
		'pt',
		'ro',
		'sr'
	],
	defaultLocale: 'en',
	directory: __dirname + '/locales',
	updateFiles: false
});

app.use(i18n.init);

app.use(express.static(__dirname + '/assets'));
app.set('view engine', 'ejs');

var cache = parseInt(process.env.CACHE) || 5;

updateCache = function(callback){
	request('https://git.silence.dev/api/v4/projects/20/repository/commits', {timeout: parseInt(process.env.TIMEOUT) || 2000, headers: {'User-Agent': 'Silence Website'}}, function (err, res) {
		if (err || typeof res == 'undefined' || typeof res.statusCode == 'undefined' || res.statusCode != 200) return callback(true);
		fs.writeFile('./cache-commits.json', res.body, function (err) {
			if (err) return callback("Cannot write cache-commits.json");
			return callback(null, JSON.parse(res.body));
		});
	});
};

getCache = function(callback){
	fs.readFile('./cache-commits.json', function (err, data) {
		if (err) return callback(err);
		return callback(null, JSON.parse(data));
	});
};

getCacheTime = function(callback){
	fs.access('./cache-commits.json', fs.constants.F_OK | fs.constants.W_OK, function(err) {
		if (err) return callback(null, cache+1);
		fs.stat('./cache-commits.json', function(err, stats){
			if (err) return callback(err);
			return callback(null, Math.floor((new Date().getTime()-stats.mtime.getTime())/1000/60));
		});
	});
};

getData = function(callback){
	getCacheTime(function(err, time){
		if (err) {
			console.log('Error when fetching data...');
			return callback(err);
		} else if (time >= cache){
			updateCache(function(err, json){
				console.log('Updating cache...');
				return callback(err, json);
			});
		} else {
			getCache(function(err, json){
				console.log('Using cache...');
				return callback(err, json);
			});
		}
	});
};

app.get('/', function (req, res) {

	moment.locale(res.locale);

	getData(function(err, commits){
		if (err) console.log(err);
		if (!err){
			commit = {};
			commit.message = commits[0].message.split('\n')[0];
			commit.date = moment(commits[0].committed_date).fromNow();
			commit.author = commits[0].author_name;
			commit.link = 'https://git.silence.dev/Silence/Silence-Android/commit/'+commits[0].id;
		}
		return res.render('index', {req: req, res: res, commit: commit});
	});
});

app.get('/location', function(req, res) {
	var ip = req.headers['x-forwarded-for'] || req.connection.remoteAddress;
	var location = require('geoip-lite').lookup(ip);
	var country = (location != null) ? location.country : "unknown";
	return res.json({"country": country});
});

app.get('/beta', function(req, res) {
	return res.redirect('https://play.google.com/apps/testing/org.smssecure.smssecure');
});

app.get('/privacy', function(req, res) {
	return res.redirect('/#privacy');
});

app.get('/donate', function(req, res) {
	return res.redirect('/#bitcoin');
});

var server = app.listen(parseInt(process.env.PORT) || 3000, function () {
	console.log('App listening at http://%s:%s', server.address().address, server.address().port);
})