app.js

const https = require('https');
const fs = require('fs');
const debug = require('debug');
const server = require('./lib/server.js');
const database = require('./database/database.js');
const engine = require('./engine/engine.js');

var ssl = {
    key: fs.readFileSync(process.env.SSLKEY),
    cert: fs.readFileSync(process.env.SSLCERT)
};

/**
 * Set the debug for this file the 'app' debugger
 */
const appDebug = debug('app');
var port = getPort();

// Start the server
var slapDashServer = https.createServer(ssl, server);

database.databaseInit();

slapDashServer.listen(process.env.SSLPORT || 8443);
slapDashServer.on('error', httpOnError);
slapDashServer.on('listening', httpOnListening);

// Initialize the engine
engine.engine();

/**
 * Function to be called if the server failed opening
 * @param error The error reason
 */
function httpOnError(err) {
    appDebug("Server failed to start the server:");
    appDebug(err);
    process.exit(1);
}

/**
 * Function to be called when server starts
 */
function httpOnListening() {
    var addr = slapDashServer.address();
    var bind = typeof addr === 'string'
    	? 'pipe ' + addr
    	: 'port ' + addr.port;
    appDebug('Listening on ' + bind);
}

/**
 * Will return the port that server should run on
 */
function getPort() {
    var newPort;
    if (process.env.PORT) { // get the port from environment
        newPort = parseInt(process.env.PORT, 10);
    } else {
        newPort = 4000;
    }
    return newPort;
}