Alexa, ask the Good Luck Guru

/**
 *
 * Examples:
 * One-shot model
 * User: Alexa, get today horoscope for Leo.
 * Alexa: You will attempt to reschedule your daily routine to be able to make the most of your day. While it is easy to make plans, implementing 
 * them and sticking to them depends on your own discipline and determination. You will become more aware about health issues and pay closer 
 * attention to your diet. You will spend an enjoyable time with your family, says Ganesha.
 *
 * Dialog model:
 * User: Alexa, ask Good Luck Guru.
 * Alexa: Welcome to the Good Luck Guru.  What is your horoscope?
 * User: Leo
 * Alexa: You will attempt to reschedule your daily routine to be able to make the most of your day. While it is easy to make plans, implementing 
 * them and sticking to them depends on your own discipline and determination. You will become more aware about health issues and pay closer 
 * attention to your diet. You will spend an enjoyable time with your family, says Ganesha.
 *
 */

'use strict';
/**
 * App ID for the skill
 */
var APP_ID = "your_app_id"; 

/**
 * The key to find the current index from the session attributes
 */
var KEY_CURRENT_INDEX = "current";


var HOROSCOPES = [
	"aries",
	"taurus",
	"geminiemini",
	"cancer",
	"leo",
	"virgo",
	"libra",
	"scorpio",
	"sagittarius",
	"capricorn",
	"aquarius",
	"pisces"
];

var http = require("http");

var optionsGet = {
	host : 'horoscope-api.herokuapp.com', 
    port : 80,
    path : '', 
    method : 'GET'
};

/**
 * The AlexaSkill prototype and helper functions
 */
var AlexaSkill = require('./AlexaSkill');


/**
 * GoodLuckGuru is a child of AlexaSkill.
 * To read more about inheritance in JavaScript, see the link below.
 *
 * @see https://developer.mozilla.org/en-US/docs/Web/JavaScript/Introduction_to_Object-Oriented_JavaScript#Inheritance
 */
var GoodLuckGuru = function () {
    AlexaSkill.call(this, APP_ID);
};

// Extend AlexaSkill
GoodLuckGuru.prototype = Object.create(AlexaSkill.prototype);
GoodLuckGuru.prototype.constructor = GoodLuckGuru;

GoodLuckGuru.prototype.eventHandlers.onSessionStarted = function (sessionStartedRequest, session) {
    console.log("GoodLuckGuru onSessionStarted requestId: " + sessionStartedRequest.requestId
        + ", sessionId: " + session.sessionId);

    // any session init logic would go here
};

GoodLuckGuru.prototype.eventHandlers.onLaunch = function (launchRequest, session, response) {
    console.log("GoodLuckGuru onLaunch requestId: " + launchRequest.requestId + ", sessionId: " + session.sessionId);
    getWelcomeResponse(response);
};

GoodLuckGuru.prototype.eventHandlers.onSessionEnded = function (sessionEndedRequest, session) {
    console.log("GoodLuckGuru onSessionEnded requestId: " + sessionEndedRequest.requestId
        + ", sessionId: " + session.sessionId);

    // any session cleanup logic would go here
};

GoodLuckGuru.prototype.intentHandlers = {
    "DailyHoroscope": function (intent, session, response) {
        getHoroscope(intent, session, response);
    },

    "AMAZON.HelpIntent": function (intent, session, response) {
        helpTheUser(intent, session, response);
    },

    "AMAZON.StopIntent": function (intent, session, response) {
        var speechOutput = "Goodbye";
        response.tell(speechOutput);
    },

    "AMAZON.CancelIntent": function (intent, session, response) {
        var speechOutput = "Goodbye";
        response.tell(speechOutput);
    }
};

/**
 * Returns the welcome response for when a user invokes this skill.
 */
function getWelcomeResponse(response) {
    // If we wanted to initialize the session to have some attributes we could add those here.
    var speechText = "Welcome to the Good Luck Guru. What is your horoscope?";
    var repromptText = "<speak>Please choose a horoscope by saying, " +
        "leo <break time=\"0.2s\" /> " +
        "libra <break time=\"0.2s\" /> " +
        "scorpio <break time=\"0.2s\" /> " +
        "pisces</speak>";

    var speechOutput = {
        speech: speechText,
        type: AlexaSkill.speechOutputType.PLAIN_TEXT
    };
    var repromptOutput = {
        speech: repromptText,
        type: AlexaSkill.speechOutputType.SSML
    };
    response.ask(speechOutput, repromptOutput);
}

function getHoroscope(intent, session, response) {
    var speechText = "",
        repromptText = "",
        speechOutput,
        repromptOutput;

    var horoscopeSlot = intent.slots.Horoscope;

    if (isHoroscope(horoscopeSlot)) {
        // Remove the periods to fix things like d. v. d.s to dvds
        var horoscope = horoscopeSlot.value.replace(/\.\s*/g, '');

		optionsGet.path = "/horoscope/today/" + horoscope;
		
		// do the GET request
		var reqGet = http.request(optionsGet, function(res) {
			console.log("statusCode: ", res.statusCode);
			// uncomment it for header details
			// console.log("headers: ", res.headers);
		 
		 
			res.on('data', function(d) {
				console.info('GET result:\n');
				process.stdout.write(d);
				console.info('\n\nCall completed');

				var obj = JSON.parse(d);
				speechText = obj.horoscope;
				repromptText = "<speak>" + obj.horoscope + "</speak>";
				
				speechOutput = {
					speech: speechText,
					type: AlexaSkill.speechOutputType.PLAIN_TEXT
				};
				repromptOutput = {
					speech: repromptText,
					type: AlexaSkill.speechOutputType.SSML
				};
				response.ask(speechOutput, repromptOutput);
			});
		 
		});
		 
		reqGet.end();
		reqGet.on('error', function(e) {
			console.error(e);

			speechText = "speech text err";
			repromptText = "reprompt text err";
			
			speechOutput = {
				speech: speechText,
				type: AlexaSkill.speechOutputType.PLAIN_TEXT
			};
			repromptOutput = {
				speech: repromptText,
				type: AlexaSkill.speechOutputType.SSML
			};
			response.ask(speechOutput, repromptOutput);

		});
    } else {

        // The horoscope didn't match one of our predefined horoscopes. Reprompt the user.
        speechText = "I'm not sure what the horoscope is, please try again";
        repromptText = "<speak>I'm not sure what the horoscope is, you can say, " +
            "leo <break time=\"0.2s\" /> " +
            "libra <break time=\"0.2s\" /> " +
            "scorpio <break time=\"0.2s\" /> " +
            "pisces.</speak>";
        speechOutput = {
            speech: speechText,
            type: AlexaSkill.speechOutputType.PLAIN_TEXT
        };
        repromptOutput = {
            speech: repromptText,
            type: AlexaSkill.speechOutputType.SSML
        };
        response.ask(speechOutput, repromptOutput);
    }
}

/**
 * Check if horoscopeSlot has a valid input value.
 */
function isHoroscope(horoscopeSlot) {
	var isHoroscope = false;
	if (horoscopeSlot && horoscopeSlot.value) {
		// lower case and remove spaces
		var horoscope = horoscopeSlot.value.toLowerCase().replace(/ /g, '').replace(/\./g, '');
		
		HOROSCOPES.forEach( function(item) {
			if (item === horoscope) {
				isHoroscope = true;
				return;
			}
		});
	}
	
	return isHoroscope;
}

/**
 * Instructs the user on how to interact with this skill.
 */
function helpTheUser(intent, session, response) {
    var speechText = "You can ask for the daily horoscope. " +
        "For example, get daily horoscope for leo, or you can say exit. " +
        "Now, what can I help you with?";
    var repromptText = "<speak> I'm sorry I didn't understand that. You can say things like, " +
        "leo <break time=\"0.2s\" /> " +
        "libra <break time=\"0.2s\" /> " +
        "scorpio. Or you can say exit. " +
        "Now, what can I help you with? </speak>";

    var speechOutput = {
        speech: speechText,
        type: AlexaSkill.speechOutputType.PLAIN_TEXT
    };
    var repromptOutput = {
        speech: repromptText,
        type: AlexaSkill.speechOutputType.SSML
    };
    response.ask(speechOutput, repromptOutput);
}

// Create the handler that responds to the Alexa Request.
exports.handler = function (event, context) {
    var goodLuckGuru = new GoodLuckGuru();
    goodLuckGuru.execute(event, context);
};