Dial-O-spresso

coffee.js

var ninjaBlocks = require('ninja-blocks');

// IMPORTANT - express 2.x must be availailable for the node-twilio lib to work
var TwilioClient = require('twilio').Client,
    Twiml = require('twilio').Twiml;

// Instantiate a Ninja Blocks client - get your _user_access_token from a.ninja.is/hacking
var ninja = ninjaBlocks.app({user_access_token:'YOUR_API_TOKEN'});

// Instantiate a Twilio client and phone number - note the host must be publicly accessible
var client = new TwilioClient('TWILIO_SID', 'TWILIO_TOKEN', 'HOSTNAME');
var phone = client.getPhoneNumber('+14158309667');

var STR = {
    POWER : 'Power',
    SHORT : 'Espresso',
    LONG : 'Long Black'
}

// Fetch our ninja devices
ninja.devices(function(err,devices) {
    if (err) {
        throw 'Error fetching devices: "'+ err.error +'"'
    } else {

        // Create a quick map of device name to guid and check that the required relays exist
        var guids = {};
        Object.keys(devices).forEach(function(guid) {
            guids[devices[guid].shortName] = guid;
        });
        if (!guids[STR.POWER] || !guids[STR.SHOT] || !guids[STR.LONG]) {
            throw 'ERROR: You must have relays named "'+STR.POWER+'", "'+STR.SHORT+'", and "'+STR.LONG+'"'
        }

        phone.setup(function(){
            // Listen for incoming calls 
            phone.on('incomingCall', function(reqParams,res){

                res.append(new Twiml.Say('Hi there . . . Coffee is delicious! . . . Would you like a cup?'));
                res.append(new Twiml.Pause());

                // Gather a response from callers (times out after 5 seconds)
                var gather = new Twiml.Gather(new Twiml.Say('Press 1 for Espresso,  Press 2 for Long Black'));
                gather.on('gathered',function(gParams,gRes){
                    var choice = "never enough";
                    if (gParams.Digits == 1){
                        coffee.pour(STR.SHORT);
                    } else if (gParams.Digits == 2) {
                        coffee.pour(STR.LONG);
                    } else {
                        choice = "bad for you";
                    }
                    // send positive reinforcement
                    gRes.append(new Twiml.Say('Good choice. Too much coffee is '+choice)).send();
                });
                // send twiml response to twilio
                res.append(gather).send();
            });

        })

        var coffee = {
            // using a relay to do a button press requires the relay to be turned on (press
            // down) and turned off (relase). This machine goes into programming mode if the
            // button is held too long, and doesn't trigger if not pressed long enough
            pressButton : function(relayName, delay) {
                ninja.device(guids[relayName]).actuate('1');
                setTimeout(function(){ninja.device(guids[relayName]).actuate('0')},delay);
            },
            pour : function(coffeeType){
                // Power up machine with a short press of the power button
                coffee.pressButton(STR.POWER,1000);
                // wait 5 seconds for machine to start then press appropriate coffee button
                setTimeout(function(){
                    coffee.pressButton(coffeeType,1000)}
                ,5000);
                // wait 20 seconds then power down machine with a long press
                setTimeout(function(){
                    coffee.pressButton(STR.POWER,5000)}
                ,25000);
            } 
        };

        // Test pour on start
        // coffee.pour(STR.SHORT);
    }
});

package.json

{
	"name": "dial-o-spresso",
	"author" : "@askpete",
	"version": "0.0.1",
	"dependencies": { 
		"express": "2.x",
		"ninja-blocks" : "latest",
		"twilio" : "latest"
	}
}