index.js

/* eslint-disable  func-names */
/* eslint-disable  no-console */

const Alexa = require('ask-sdk-core');
const cookbook = require('./alexa-cookbook.js');

//=========================================================================================================================================
//TODO: The items below this comment need your attention.
//=========================================================================================================================================

const SKILL_NAME = 'Space Facts';
const GET_FACT_MESSAGE = 'Here\'s your fact: ';
const HELP_MESSAGE = 'You can say tell me a space fact, or, you can say exit... What can I help you with?';
const HELP_REPROMPT = 'What can I help you with?';
const FALLBACK_MESSAGE = 'The Space Facts skill can\'t help you with that.  It can help you discover facts about space if you say tell me a space fact. What can I help you with?';
const FALLBACK_REPROMPT = 'What can I help you with?';
const STOP_MESSAGE = 'Goodbye!';

//=========================================================================================================================================
//TODO: Replace this data with your own.  You can find translations of this data at http://github.com/alexa/skill-sample-nodejs-fact/tree/en-US/lambda/data
//=========================================================================================================================================

const data = [
  'A year on Mercury is just 88 days long.',
  'Despite being farther from the Sun, Venus experiences higher temperatures than Mercury.',
  'Venus rotates counter-clockwise, possibly because of a collision in the past with an asteroid.',
  'On Mars, the Sun appears about half the size as it does on Earth.',
  'Earth is the only planet not named after a god.',
  'Jupiter has the shortest day of all the planets.',
  'The Milky Way galaxy will collide with the Andromeda Galaxy in about 5 billion years.',
  'The Sun contains 99.86% of the mass in the Solar System.',
  'The Sun is an almost perfect sphere.',
  'A total solar eclipse can happen once every 1 to 2 years. This makes them a rare event.',
  'Saturn radiates two and a half times more energy into space than it receives from the sun.',
  'The temperature inside the Sun can reach 15 million degrees Celsius.',
  'The Moon is moving approximately 3.8 cm away from our planet every year.',
];

//=========================================================================================================================================
//Editing anything below this line might break your skill.
//=========================================================================================================================================

const GetNewFactHandler = {
  canHandle(handlerInput) {
    const request = handlerInput.requestEnvelope.request;
    return request.type === 'LaunchRequest'
      || (request.type === 'IntentRequest'
        && request.intent.name === 'GetNewFactIntent');
  },
  handle(handlerInput) {
    const randomFact = cookbook.getRandomItem(data);
    const speechOutput = GET_FACT_MESSAGE + randomFact;

    return handlerInput.responseBuilder
      .speak(speechOutput)
      .withSimpleCard(SKILL_NAME, randomFact)
      .getResponse();
  },
};

const HelpHandler = {
  canHandle(handlerInput) {
    const request = handlerInput.requestEnvelope.request;
    return request.type === 'IntentRequest'
      && request.intent.name === 'AMAZON.HelpIntent';
  },
  handle(handlerInput) {
    return handlerInput.responseBuilder
      .speak(HELP_MESSAGE)
      .reprompt(HELP_REPROMPT)
      .getResponse();
  },
};

const FallbackHandler = {
  // 2018-May-01: AMAZON.FallbackIntent is only currently available in en-US locale.
  //              This handler will not be triggered except in that locale, so it can be
  //              safely deployed for any locale.
  canHandle(handlerInput) {
    const request = handlerInput.requestEnvelope.request;
    return request.type === 'IntentRequest'
      && request.intent.name === 'AMAZON.FallbackIntent';
  },
  handle(handlerInput) {
    return handlerInput.responseBuilder
      .speak(FALLBACK_MESSAGE)
      .reprompt(FALLBACK_REPROMPT)
      .getResponse();
  },
};

const ExitHandler = {
  canHandle(handlerInput) {
    const request = handlerInput.requestEnvelope.request;
    return request.type === 'IntentRequest'
      && (request.intent.name === 'AMAZON.CancelIntent'
        || request.intent.name === 'AMAZON.StopIntent');
  },
  handle(handlerInput) {
    return handlerInput.responseBuilder
      .speak(STOP_MESSAGE)
      .getResponse();
  },
};

const SessionEndedRequestHandler = {
  canHandle(handlerInput) {
    const request = handlerInput.requestEnvelope.request;
    return request.type === 'SessionEndedRequest';
  },
  handle(handlerInput) {
    console.log(`Session ended with reason: ${handlerInput.requestEnvelope.request.reason}`);

    return handlerInput.responseBuilder.getResponse();
  },
};

const ErrorHandler = {
  canHandle() {
    return true;
  },
  handle(handlerInput, error) {
    console.log(`Error handled: ${error.message}`);

    return handlerInput.responseBuilder
      .speak('Sorry, an error occurred.')
      .reprompt('Sorry, an error occurred.')
      .getResponse();
  },
};

const skillBuilder = Alexa.SkillBuilders.custom();

exports.handler = skillBuilder
  .addRequestHandlers(
    GetNewFactHandler,
    HelpHandler,
    ExitHandler,
    FallbackHandler,
    SessionEndedRequestHandler
  )
  .addErrorHandlers(ErrorHandler)
  .lambda();