nope.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 BookletState = vumigo.states.BookletState;
var InteractionMachine = vumigo.state_machine.InteractionMachine;
var StateCreator = vumigo.state_machine.StateCreator;

function GoNikeGHRError(msg) {
    var self = this;
    self.msg = msg;

    self.toString = function() {
        return "<GoNikeGHRError: " + self.msg + ">";
    };
}

function GoNikeGHR() {
    var self = this;

    self.post_headers = {
        'Content-Type': ['application/x-www-form-urlencoded']
    };

    // The first state to enter

    StateCreator.call(self, 'initial_state');

    self.get_today = function(im) {
        if (im.config.testing) {
            return new Date(im.config.testing_mock_today[0],
                             im.config.testing_mock_today[1],
                             im.config.testing_mock_today[2],
                             im.config.testing_mock_today[3],
                             im.config.testing_mock_today[4]);
        } else {
            return new Date();
        }
    };

    self.error_state = function() {
        return new EndState(
            "end_state_error",
            "Sorry! Something went wrong. Please redial and try again.",
            "initial_state"
        );
    };

    self.get_contact = function(im){
        var p = im.api_request('contacts.get_or_create', {
            delivery_class: 'ussd',
            addr: im.user_addr
        });
        return p;
    };



    self.make_main_menu = function(){
        return new ChoiceState(
            "main_menu",
            function(choice) {
                return choice.value;
            },
            "",
            [
                new Choice("articles", "Articles"),
                new Choice("opinions", "Opinions"),
                new Choice("wwnd", "What would Ndabaga do?"),
                new Choice("quiz_start", "Weekly quiz"),
                new Choice("directory_start", "Directory")
            ]
        );
    };

    self.add_creator('initial_state', function(state_name, im) {
        // Check if they've already registered
        var p = self.get_contact(im);

        p.add_callback(function(result) {
            // This callback creates extras if first time visitor - or just passes through
            if (result.contact["extras-ghr_reg_complete"] === undefined){
                // First visit - create extras
                var today = self.get_today(im);
                var fields = {
                    "ghr_reg_complete": "false",
                    "ghr_reg_started": today.toISOString(),
                    "ghr_questions": JSON.stringify([]),
                    "ghr_gender": "",
                    "ghr_age": "",
                    "ghr_sector": "",
                    "ghr_terms_accepted": "false"
                };
                // Run the extras update
                return im.api_request('contacts.update_extras', {
                    key: result.contact.key,
                    fields: fields
                });
            } else {
                // Not first so just pass previous callback result on
                return result;
            }
        });

        p.add_callback(function(result) {
            // This callback generates the state the user sees
            if (result.success){
                if (result.contact["extras-ghr_reg_complete"] == "false"){
                    // Did not finish registration and session state not found
                    return new ChoiceState(
                        state_name,
                        function(choice) {
                            return choice.value;
                        },
                        "To proceed with registration, do you accept the Terms " +
                        "and Conditions of Ni Nyampinga - " + im.config.terms_url + ":",
                        [
                            new Choice("reg_gender", "Yes"),
                            new Choice("reg_noterms", "No")
                        ]
                    );
                } else {
                    // Registration complete so check for questions
                    // Check all question sets have been answered
                    return self.make_main_menu();
                }
            } else {
                // Something went wrong saving the extras
                return self.error_state();
            }
        });
        return p;  // return the promise
    });

    self.add_state(new EndState(
        "reg_noterms",
        "Sorry but we can't proceed with your registration unless you accept the " +
        "Terms & Conditions. Please redial if you change your mind. Thanks!",
        "initial_state"
    ));


    self.add_state(new EndState(
        "end_state",
        "Thank you and bye bye!",
        "first_state"
    ));
}

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