alexa.js

const Alexa = require('ask-sdk-core');

const LaunchRequestHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'LaunchRequest';
  },
  handle(handlerInput) {
    const speakOutput = 'Welcome to Voice Travel';

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

const DemoHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'love';
  },
  handle(handlerInput) {
    const speakOutput = 'I dont think so';

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

const HelpHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.HelpIntent';
  },
  handle(handlerInput) {
    const speakOutput = 'You can say hello to me!';

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

const CancelAndStopHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.request.type === 'IntentRequest'
      && (handlerInput.requestEnvelope.request.intent.name === 'AMAZON.CancelIntent'
        || handlerInput.requestEnvelope.request.intent.name === 'AMAZON.StopIntent');
  },
  handle(handlerInput) {
    const speakOutput = 'Goodbye!';

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

const SessionEndedRequestHandler = {
  canHandle(handlerInput) {
    return handlerInput.requestEnvelope.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}`);
    console.log(error.trace);

    return handlerInput.responseBuilder
      .speak('Sorry, I can\'t understand the command. Please say again.')
      .getResponse();
  },
};

const skillBuilder = Alexa.SkillBuilders.custom();

exports.handler = skillBuilder
  .addRequestHandlers(
    LaunchRequestHandler,
    DemoHandler,
    HelpHandler,
    CancelAndStopHandler,
    SessionEndedRequestHandler,
  )
  .addErrorHandlers(ErrorHandler)
  .lambda();