Alexa Skill - Find lunch near fishtown

handlers.js

const respondToAskAboutLunch = require('./lunch-handler');

module.exports = {
  AskAboutLunchIntent: respondToAskAboutLunch,
  LaunchRequest: respondToLaunch,
  'AMAZON.HelpIntent': respondToHelp,
  'AMAZON.StopIntent': respondToCancel,
  'AMAZON.CancelIntent': respondToCancel,
};

const helpSpeech = 'You can ask Lunchbot: where should I go to eat, or where can I get a certain kind of food?';

function respondToLaunch() {
  this.emit(':ask', `Hello! ${helpSpeech}`);
}

function respondToHelp() {
  this.emit(':ask', `Lunchbot will suggest an open restaurant for you in Fishtown, Philadelphia, based on what kind of food you're in the mood for. ${helpSpeech}`);
}

function respondToCancel() {
  this.emit(':tell', 'Sure thing.');
}

index.js

const skill = require('./src/skill');

exports.handler = skill;

lunch-handler.js

const yelp = require('./yelp');

module.exports = function respondToAskAboutLunch() {
  if (this.event.request.dialogState !== 'COMPLETED') {
    return this.emit(':delegate');
  }

  const intent = this.event.request.intent;
  const cuisine = intent.slots.Cuisine.value.toLowerCase();

  return getLunchOption(cuisine)
    .then((option) => {
      if (option) {
        return this.emit(':tell', `You could go to ${option.name}. It's at ${option.location.address1}.`);
      }
      return this.emit(':tell', 'Sorry, I couldn\'t find anything nearby.');
    })
    .catch((error) => {
      const errorBody = JSON.parse(error.response.body);
      const errorCode = errorBody && errorBody.error.code;

      if (errorCode === 'INVALID_CATEGORY') {
        const promptSpeech = 'Sorry, I didn\'t catch that. What would you like?';
        return this.emit(':elicitSlot', 'Cuisine', promptSpeech, promptSpeech);
      }

      const speech = 'Sorry, I had some trouble looking for restaurants. Try asking me again.';
      return this.emit(':tell', speech);
    });
};

function getLunchOption(cuisine) {
  return yelp.fetchNearbyLunchOption(cuisine)
    .then(options => getRandom(options));
}

function getRandom(arr) {
  return arr[Math.floor(Math.random() * arr.length)];
}

skill.js

const Alexa = require('alexa-sdk');
const handlers = require('./handlers');

module.exports = (event, context, callback) => {
  const alexa = Alexa.handler(event, context, callback);
  alexa.appId = process.env.ALEXA_APP_ID;
  alexa.registerHandlers(handlers);
  alexa.execute();
};

yelp.js

const yelp = require('yelp-fusion');

function createClient() {
  return yelp.client(process.env.YELP_ACCESS_TOKEN);
}

function fetchNearbyLunchOption(cuisine) {
  return createClient()
    .search({
      categories: `${cuisine}`,
      location: '1234 Frankford Ave, Philadelphia, PA 19125',
      radius: 800,
    })
    .then(response => response.jsonBody.businesses);
}

module.exports = {
  fetchNearbyLunchOption,
};