app.js

var express = require('express');
var path = require('path');
var favicon = require('static-favicon');
var logger = require('morgan');
var cookieParser = require('cookie-parser');    
var bodyParser = require('body-parser');
var firebase = require('./config');

var spawn = require('child_process').spawn;

function spawnProcess() {
    var scriptPath = path.join(__dirname, 'neural-style', 'render.py');
    var modelsPath = path.join(__dirname, 'neural-style', 'models');
    var proc = spawn('python', [scriptPath, '-m', modelsPath]);

    proc.on('close', function(code) {
        console.error('Python process has shutdown unexpectedly...');
        spawnProcess();
    });
}

spawnProcess();

var routes = require('./app_ui/routes/index');
var routesApi = require('./app_api/routes')(firebase, path.join(__dirname, 'public', 'uploaded'));
var users = require('./app_ui/routes/users');

var app = express();

// view engine setup
app.set('views', path.join(__dirname, 'app_ui', 'views'));
app.set('view engine', 'jade');

app.use(favicon(__dirname + '/public/favicon.png'));
app.use(logger('dev'));
app.use(bodyParser.json());
app.use(bodyParser.urlencoded());
app.use(cookieParser());
app.use(express.static(path.join(__dirname, 'public')));

app.use('/', routes);
app.use('/api', routesApi);
app.use('/users', users);

/// catch 404 and forwarding to error handler
app.use(function(req, res, next) {
    var err = new Error('Not Found');
    err.status = 404;
    next(err);
});

/// error handlers

// development error handler
// will print stacktrace
if (app.get('env') === 'development') {
    app.use(function(err, req, res, next) {
        res.status(err.status || 500);
        res.render('error', {
            message: err.message,
            error: err
        });
    });
}

// production error handler
// no stacktraces leaked to user
app.use(function(err, req, res, next) {
    res.status(err.status || 500);
    res.render('error', {
        message: err.message,
        error: {}
    });
});

module.exports = app;