server.js

// server.js
// where your node app starts

// init project
var express = require('express');
var app = express();
var strftime = require('strftime');

// enable CORS (https://en.wikipedia.org/wiki/Cross-origin_resource_sharing)
// so that your API is remotely testable by FCC 
var cors = require('cors');
app.use(cors({optionSuccessStatus: 200}));  // some legacy browsers choke on 204

// http://expressjs.com/en/starter/static-files.html
app.use(express.static('public'));

// http://expressjs.com/en/starter/basic-routing.html
app.get("/", function (req, res) {
  res.sendFile(__dirname + '/views/index.html');
});


// your first API endpoint... 
app.get("/api/hello", function (req, res) {
  res.json({greeting: 'hello API'});
});

function convertDate(date) {
  return new Date(date);
}

app.get("/api/timestamp/:dateString" , (req, res) => {
  var num = Number(req.params.dateString);
  if (isNaN(num)) {
    var time = Date.parse(req.params.dateString);
  }
  else{
    var time = new Date(num*1000);
  }
  if (isNaN(time)) {
    res.send({'unix':null,'natural':null});
  }
  else{
    res.send({'unix':time/1000,'natural':strftime('%B %d, %Y', new Date(time))});
  }
})



// listen for requests :)
var listener = app.listen(process.env.PORT, function () {
  console.log('Your app is listening on port ' + listener.address().port);
});