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GDG-Capital Region DevFest

12 Nov 2016

Who am I?

Allen Firstenberg

Software developer / Consultant

Google Developer Expert

Author: Designing and Developing for Google Glass

http://spiders.com/

http://prisoner.com/

What are we talking about?

• Google Home
• The Google Assistant
• Programming (more like some kludges) with the Google Assistant, IFTTT, the Firebase Database, and some code.

Default Features in Home

• Voice commands
• Voice responses
• Contextual conversations

• Ask questions
• Audio
• Home device control

What about programming?

• Bad news
• "OK" news
• Good news!

Programming: Bad news

Not available. Yet.

Programming: Good news

It is coming!

Sign up at:

https://developers.google.com/actions/

Programming: Until then...

IFTTT for the Google Assistant is available today, and we can use it to build some simple actions.

Like being able to control a slide deck.

Coding: node.js server

We need a simple server that will accept some JSON and set a value in Firebase.

exports.webFirebase = function( req, res ){
  var body  = req.body;
  var child = body.child;
  var cmd   = body.cmd;
  var val   = body.val;

  var fb = require('firebase');
  fb.initialzieApp(config);
  var ref = fb.database().ref('/slides').child(child);

  if( cmd === 'change' ){
    ref.once( 'value' ).then( oldValue => {
      var newValue = oldValue.val() + val;
      return ref.set( newValue );
    }).then( result => {
      console.log( 'result', result );
    }).catch( err => {
      console.log( 'err', err );
    } ).then( () => res.send('') );
  } else if( cmd === 'set' ){
    ref.set( val ).then( result => {
      console.log( 'set result', result );
    } ).catch( err => {
      console.log( 'set err', err );
    } ).then( () => res.send('') );
  }
};

(Some parts of this, like security, have clearly been omitted.)

Coding: Slide deck

Start with slides generated from https://slides.com/

<script src="https://www.gstatic.com/firebasejs/3.5.2/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/3.5.2/firebase-database.js"></script>
<script>
  // Initialize Firebase
  var config = {
    apiKey: "...",
    authDomain: "...",
    databaseURL: "..."
  };
  firebase.initializeApp(config);

  var db = firebase.database();
  db.ref('/slides/gdg-capdist-home').on('value', function(ref){
    var val = ref.val();
    Reveal.slide(val);
  });
</script>

Then add some code that calls the reveal.js API when the Firebase db changes

Coding Glue: IFTTT This

Use the "Google Assistant" service to setup a trigger that includes a number

Coding Glue: IFTTT That

Use the "Maker" service to setup an action that POSTs some JSON to a public URL

(Again, some parts of this, like security, have been omitted.)

Questions?

Allen Firstenberg

http://spiders.com/

http://prisoner.com/