app.js

/* global require console process Promise module */

const express = require('express'),
  app = express();

function getRandomInt(max) {
  return Math.floor(Math.random() * Math.floor(max));
}

function getTail() {
  let c = [
    'a',
    'b',
    'c',
    'd',
    'e',
    'f',
    'g',
    'h',
    'i',
    'j',
    'k',
    'l',
    'm',
    'n',
    'o',
    'p',
    'q',
    'r',
    's',
    't',
    'u',
    'v',
    'w',
    'x',
    'y',
    'z'
  ];
  return `N${getRandomInt(9999)}${c[getRandomInt(c.length - 1)]}`;
}

function getAirline() {
  const airlines = [
    'SWA',
    'AAL',
    'BAW',
    'DAL',
    'UAE',
    'KLM',
    'DLH',
    'ASA',
    'UAL',
    'FDX',
    'PXM',
    'SKW',
    'JBU',
    'ACA',
    'QXE',
    'NKS',
    'VIR',
    'LXJ',
    'QFA'
  ];
  return airlines[getRandomInt(airlines.length - 1)];
}

function getTime() {
  return '01:23';
}

function getFlight() {
  return getRandomInt(2000);
}

function getHeading() {
  return getRandomInt(359)
    .toString()
    .padStart(3, '0');
}

function getGate() {
  const t = ['A', 'B', 'C'][getRandomInt(2)];
  const g = getRandomInt(30);
  return `${t}${g}`;
}

function getCity() {
  const cities = [
    'Atlanta',
    'Baltimore',
    'Charleston',
    'Durban',
    'Edinburgh',
    'Frankfurt',
    'Galveston',
    'Havana',
    'Iowa City',
    'Jakarta',
    'Karachi',
    'Los Angeles',
    'Mexico City',
    'Nairobi',
    'Ontario',
    'Pittsburgh',
    'Quebec City',
    'Roanoake',
    'San Diego',
    'Tallahassee'
  ];
  return cities[getRandomInt(20)];
}

function getTime() {
  let hrs = getRandomInt(23)
    .toString()
    .padStart(2, '0');
  let mins = getRandomInt(59)
    .toString()
    .padStart(2, '0');
  return `${hrs}${mins}`;
}

// ========================================================================
// API

app.use('/api/arrivals', (req, res) => {
  let r = {
    data: []
  };

  for (let i = 0; i < 18; i++) {
    // Create the data for a row.
    let data = {
      airline: getAirline(),
      flight: getFlight(),
      city: getCity(),
      gate: getGate(),
      scheduled: getTime()
    };

    // Let's add an occasional delayed flight.
    data.status = getRandomInt(10) > 7 ? 'B' : 'A';
    if (data.status === 'B') {
      data.remarks = `Delayed ${getRandomInt(50)}M`;
    }

    // Add the row the the response.
    r.data.push(data);
  }

  res.json(r);
});

// ========================================================================
// STATIC FILES
app.use('/', express.static('public'));

// ========================================================================
// WEB SERVER
const port = process.env.PORT || 8080;
app.listen(port);
console.log('split flap started on port ' + port);