simple.js

var vumigo = require('vumigo_v01');
var jed = require('jed');

if (typeof api === 'undefined') {
    // testing hook (supplies api when it is not passed in by the real sandbox)
    var api = this.api = new vumigo.dummy_api.DummyApi();
}

var Promise = vumigo.promise.Promise;
var success = vumigo.promise.success;
var Choice = vumigo.states.Choice;
var ChoiceState = vumigo.states.ChoiceState;
var FreeText = vumigo.states.FreeText;
var EndState = vumigo.states.EndState;
var InteractionMachine = vumigo.state_machine.InteractionMachine;
var StateCreator = vumigo.state_machine.StateCreator;

function Simple() {
  var self = this;
  // The first state to enter
  StateCreator.call(self, 'initial_state');

  self.add_state(new ChoiceState(
    'initial_state',
    function(choice) { return choice.value; },
    'What would you like?',
    [new Choice('state_little', 'Spam bacon sausage and spam'),
     new Choice('state_some', 'Spam egg spam spam bacon and spam'),
     new Choice('state_lots', 'Spam sausage spam spam bacon spam spam tomato and spam')])
  );

  self.add_state(new EndState(
    'state_little',
    'Ok, bye.',
    'initial_state'));

  self.add_state(new FreeText(
    'state_some',
    function(content, done) { done('state_response_why_some'); },
    'Why?'));

  self.add_state(new EndState(
    'state_response_why_some',
    'Cool, bye.',
    'initial_state'));

  self.add_creator('state_lots', function(state_name, im) {
    var n = Math.floor(Math.random() * (10 - 4) +  4);
    var spams = [];
    while (n--) { spams.push('spam'); }

    new EndState(
      state_name,
      '...' + spams.join(' ') + '...',
      'initial_state');
  });
}

// launch app
var states = new Simple();
var im = new InteractionMachine(api, states);
im.attach();