server.js

var static = require('node-static'),
    five = require('johnny-five');

//
// Node server
//
var file = new static.Server('./dist');

var server = require('http').createServer(function (request, response) {
  request.addListener('end', function () {
    file.serve(request, response);
  }).resume();
});
server.listen(process.env.PORT || 8080);

//
// Socket.io
//
var io = require('socket.io').listen(server);

io.sockets.on('connection', function (socket) {

  var board = new five.Board();

  socket.emit('server event', { text: 'Socket.io works' });

  socket.on('client event', function (data) {
    console.log(data.text);
  });

  //
  // Arduino
  //
  board.on('ready', function () {
    var tilt = new five.Button(2),
      greenLed = new five.Led(7),
      redLed = new five.Led(8),
      totalTimePoured = 0,
      pourStartTime = 0,
      holdCalled = false,
      downCalled = false;


    board.repl.inject({
      button: tilt
    })

    tilt.on('down', function () {
      if (downCalled) {
        return;
      }

      pourStartTime = new Date().getTime();
      holdCalled = false;
      downCalled = true;

      console.log('START POURIN: ' + pourStartTime);
      greenLed.on()
      redLed.off()
    })

    tilt.on('hold', function () {
      holdCalled = true;
      var currentTime = new Date().getTime();
      console.log('BEEN POURIN FOR: ' + (currentTime - pourStartTime) + ' MILLISECONDS');
    })

    tilt.on('up', function () {
      redLed.on()
      greenLed.off();

      var endTime = new Date().getTime();
      var thisPourLength = (endTime - pourStartTime);
      pourStartTime = endTime;
      downCalled = false;

      // 500 millisecond hysteresis to get rid of some sensor noise
      if (holdCalled && thisPourLength > 500) {
        addPourTimeToTotal(thisPourLength);
        console.log('BEERS DONE, POURED FOR: ' + thisPourLength + ' MILLISECONDS');
        console.log('TOTAL FOR ALL POURS: ' + totalTimePoured + ' MILLISECONDS');
      }
      else {
        console.log('POUR TOO SHORT');
      }

      holdCalled = false;
    })

    this.on('exit', function () {
      greenLed.off()
      redLed.off()
    })

    function reset() {
      totalTimePoured = 0;
    }

    function addPourTimeToTotal(time) {
      totalTimePoured += time;
      // update UI
      socket.emit('pour done', {
        value: totalTimePoured
      });
    }

  })

});