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#!/usr/bin/env node

/**
 * Module dependencies.
 */

var fs = require('fs')
var app = require('../app')
var debug = require('debug')('rooster:server')
var http = require('http')
var https = require('https')

var shouldUseHTTPS = true
try {
  fs.accessSync('/etc/letsencrypt/live/rooster.hetmml.nl/privkey.pem')
} catch (e) {
  shouldUseHTTPS = false
}

var privateKey = ''
var certificate = ''
var credentials = {}

if (shouldUseHTTPS) {
  privateKey = fs.readFileSync('/etc/letsencrypt/live/rooster.hetmml.nl/privkey.pem', 'utf8')
  certificate = fs.readFileSync('/etc/letsencrypt/live/rooster.hetmml.nl/cert.pem', 'utf8')
  credentials = {key: privateKey, cert: certificate}
}

/**
 * Get port from environment and store in Express.
 */

var port = normalizePort(process.env.PORT || '3000')
var httpsPort
if (shouldUseHTTPS) httpsPort = normalizePort(process.env.PORT_HTTPS || '3001')
app.set('port', port)

/**
 * Create HTTP server.
 */

var server = http.createServer(app)
var httpsServer
if (shouldUseHTTPS) httpsServer = https.createServer(credentials, app)

/**
 * Listen on provided port, on all network interfaces.
 */

server.listen(port)
server.on('error', onError)
server.on('listening', onListening)
if (shouldUseHTTPS) {
  httpsServer.listen(httpsPort)
  httpsServer.on('error', onError)
  httpsServer.on('listening', onListening)
}

/**
 * Normalize a port into a number, string, or false.
 */

function normalizePort (val) {
  var port = parseInt(val, 10)

  if (isNaN(port)) {
    // named pipe
    return val
  }

  if (port >= 0) {
    // port number
    return port
  }

  return false
}

/**
 * Event listener for HTTP server "error" event.
 */

function onError (error) {
  if (error.syscall !== 'listen') {
    throw error
  }

  var bind = typeof port === 'string'
    ? 'Pipe ' + port
    : 'Port ' + port

  // handle specific listen errors with friendly messages
  switch (error.code) {
    case 'EACCES':
      console.error(bind + ' requires elevated privileges')
      process.exit(1)
      break
    case 'EADDRINUSE':
      console.error(bind + ' is already in use')
      process.exit(1)
      break
    default:
      throw error
  }
}

/**
 * Event listener for HTTP server "listening" event.
 */

function onListening () {
  var addr = server.address()
  var bind = typeof addr === 'string'
    ? 'pipe ' + addr
    : 'port ' + addr.port
  debug('Listening on ' + bind)
}