How To Develop A Chat Bot With Node.js

const botBuilder = require('claudia-bot-builder');

module.exports = botBuilder(request => 'Thanks for sending ${request.text}');

const botBuilder = require('claudia-bot-builder');

module.exports = botBuilder(request => `Hello from space explorer bot! Your request was: ${request.text}`);

claudia create --region us-east-1 --api-module bot --configure-fb-bot

const botBuilder = require('claudia-bot-builder');
const fbTemplate = botBuilder.fbTemplate;
const rp = require('minimal-request-promise');

module.exports = botBuilder((request, originalApiRequest) => {
  // If request is not postback
  if (!request.postback)
    // We'll get some basic info about the user
    return rp.get(`https://graph.facebook.com/v2.6/${request.sender}?fields=first_name&access_token=${originalApiRequest.env.facebookAccessToken}`)
      .then(response => {
        const user = JSON.parse(response.body)
        // Then let's send two text messages and one generic template with three elements/bubbles
        return [
          `Hello, ${user.first_name}. Welcome to Space Explorer! Ready to start a journey through space?`,
          'What can I do for you today?',
          return new fbTemplate.generic()
            .addBubble(`NASA's Astronomy Picture of the Day`, 'Satellite icon by parkjisun from the Noun Project')
              .addImage('https://raw.githubusercontent.com/stojanovic/space-explorer-bot/master/assets/images/apod.png')
              .addButton('Show', 'SHOW_APOD')
              .addButton('What is APOD?', 'ABOUT_APOD')
              .addButton('Website', 'https://apod.nasa.gov/apod/')
            .addBubble(`Photos from NASA's rovers on Mars`, 'Curiosity Rover icon by Oliviu Stoian from the Noun Project')
              .addImage('https://raw.githubusercontent.com/stojanovic/space-explorer-bot/master/assets/images/mars-rover.png')
              .addButton('Curiosity', 'CURIOSITY_IMAGES')
              .addButton('Opportunity', 'OPPORTUNITY_IMAGES')
              .addButton('Spirit', 'SPIRIT_IMAGES')
            .addBubble('Help & info', 'Monster icon by Paulo Sá Ferreira from the Noun Project')
              .addImage('https://raw.githubusercontent.com/stojanovic/space-explorer-bot/master/assets/images/about.png')
              .addButton('About the bot', 'ABOUT')
              .addButton('Credits', 'CREDITS')
              .addButton('Report an issue', 'https://github.com/stojanovic/space-explorer-bot/issues')
            .get();
        ];
      });
}

// In case of the 'SHOW_APOD' postback, we'll contact NASA API and get the photo of the day.
if (request.text === 'SHOW_APOD')
  return rp(`https://api.nasa.gov/planetary/apod?api_key=${originalApiRequest.env.nasaApiKey}`)
    .then(response => {
      const APOD = JSON.parse(response.body)
      return [
        `NASA's Astronomy Picture of the Day for ${APOD.date}`,
        `"${APOD.title}", © ${APOD.copyright}`,
        new fbTemplate.image(APOD.url).get(),
        APOD.explanation,
        new fbTemplate.button('More actions:')
          .addButton('Download HD', APOD.hdurl)
          .addButton('Visit website', 'https://apod.nasa.gov/apod/')
          .addButton('Back to start', 'MAIN_MENU')
          .get()
      ]
    });

// Common API call
function getRoverPhotos(rover, sol, nasaApiKey) {
  // If sol (Mars day) is not defined, take a random one.
  if (!sol)
    sol = (parseInt(Math.random() * 9) + 1) * 100;

  // Contact the API
  return rp(`https://api.nasa.gov/mars-photos/api/v1/rovers/${rover}/photos?sol=${sol}&api_key=${nasaApiKey}`)
    .then(response => {
      let rawBody = response.body;

      let roverInfo = JSON.parse('' + rawBody);
      // Create generic template with up to 10 photos.
      let photos = roverInfo.photos.slice(0, 10);
      let roverImages = new fbTemplate.generic();

      photos.forEach(photo => {
        return roverImages.addBubble(photo.rover.name, 'At ' + photo.earth_date + ' (sol ' + photo.sol + '), using ' + photo.camera.full_name)
          .addImage(photo.img_src)
          .addButton('Download', photo.img_src)
      });

      // Send the message.
      return [
        `${roverInfo.photos[0].rover.name} rover`,
        `Landing Date: ${roverInfo.photos[0].rover.landing_date} \nTotal photos: ${roverInfo.photos[0].rover.total_photos}`,
        roverImages.get(),
        new fbTemplate.button('More actions:')
          .addButton('Show newest photos', `PHOTOS_${rover}_${roverInfo.photos[0].rover.max_sol}`)
          .addButton('Visit Wikipedia', `https://en.wikipedia.org/wiki/${rover}_(rover)`)
          .addButton('Back to start', 'MAIN_MENU')
          .get()
      ];
    })
    .catch(err => {
      // If the selected sol doesn't have any photos, take the photos from sol 1000.
      console.log(err);
      return getRoverPhotos(rover, 1000, nasaApiKey);
    });
}

// Curiosity photos
if (request.text === 'CURIOSITY_IMAGES')
  return getRoverPhotos('curiosity', null, originalApiRequest.env.nasaApiKey);

// Opportunity photos
if (request.text === 'OPPORTUNITY_IMAGES')
  return getRoverPhotos('opportunity', null, originalApiRequest.env.nasaApiKey);

// Spirit photos
if (request.text === 'SPIRIT_IMAGES')
  return getRoverPhotos('spirit', null, originalApiRequest.env.nasaApiKey);

// Rover photos by sol (Mars day)
if (request.text.indexOf('PHOTOS_') === 0) {
  const args = request.text.split('_')
  return getRoverPhotos(args[1], args[2], originalApiRequest.env.nasaApiKey);
}

// About Astronomy Picture of the Day
if (request.text === 'ABOUT_APOD')
  return [
    `The Astronomy Picture of the Day is one of the most popular websites at NASA. In fact, this website is one of the most popular websites across all federal agencies. It has the popular appeal of a Justin Bieber video.`,
    `Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer.`,
    new fbTemplate.button('More actions:')
      .addButton('Show photo', 'SHOW_APOD')
      .addButton('Visit website', 'https://apod.nasa.gov/apod/')
      .addButton('Back to start', 'MAIN_MENU')
      .get()
  ];

// About the bot
if (request.text === 'ABOUT')
  return [
    `Space Explorer is simple Messenger chat bot that uses NASA's API to get the data and images about the space`,
    `It's created for fun and also as a showcase for Claudia Bot Builder, node.js library for creating chat bots for various platform and deploying them on AWS Lambda`,
    new fbTemplate.button('More actions:')
      .addButton('Claudia Bot Builder', 'https://github.com/claudiajs/claudia-bot-builder')
      .addButton('Source code', 'https://github.com/stojanovic/space-explorer-bot')
      .get()
  ];

// Finally, credits
if (request.text === 'CREDITS')
  return [
    'Claudia Bot Builder was created by Gojko Adžić, Aleksandar Simović and Slobodan Stojanović',
    'Icons used for the bot are from the Noun Project',
    '- Rocket icon by misirlou, \n- Satellite icon by parkjisun, \n- Curiosity Rover icon by Oliviu Stoian, \n- Monster icon by Paulo Sá Ferreira',
    'This bot was created by Claudia Bot Builder team',
    new fbTemplate.button('More actions:')
      .addButton('Claudia Bot Builder', 'https://github.com/claudiajs/claudia-bot-builder')
      .addButton('The Noun Project', 'https://thenounproject.com')
      .addButton('Source code', 'https://github.com/stojanovic/space-explorer-bot')
      .get()
  ];