index.js

// Copyright 2018, Google, Inc.
// Licensed under the Apache License, Version 2.0 (the 'License');
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//  http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an 'AS IS' BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

'use strict';

// Import the Dialogflow module and response creation dependencies
// from the Actions on Google client library.
const {
  dialogflow,
  BasicCard,
  Permission,
  Suggestions,
} = require('actions-on-google');

// Import the firebase-functions package for deployment.
const functions = require('firebase-functions');

// Instantiate the Dialogflow client.
const app = dialogflow({debug: true});

// Define a mapping of fake color strings to basic card objects.
const colorMap = {
  'indigo taco': {
    title: 'Indigo Taco',
    text: 'Indigo Taco is a subtle bluish tone.',
    image: {
      url: 'https://storage.googleapis.com/material-design/publish/material_v_12/assets/0BxFyKV4eeNjDN1JRbF9ZMHZsa1k/style-color-uiapplication-palette1.png',
      accessibilityText: 'Indigo Taco Color',
    },
    display: 'WHITE',
  },
  'pink unicorn': {
    title: 'Pink Unicorn',
    text: 'Pink Unicorn is an imaginative reddish hue.',
    image: {
      url: 'https://storage.googleapis.com/material-design/publish/material_v_12/assets/0BxFyKV4eeNjDbFVfTXpoaEE5Vzg/style-color-uiapplication-palette2.png',
      accessibilityText: 'Pink Unicorn Color',
    },
    display: 'WHITE',
  },
  'blue grey coffee': {
    title: 'Blue Grey Coffee',
    text: 'Calling out to rainy days, Blue Grey Coffee brings to mind your favorite coffee shop.',
    image: {
      url: 'https://storage.googleapis.com/material-design/publish/material_v_12/assets/0BxFyKV4eeNjDZUdpeURtaTUwLUk/style-color-colorsystem-gray-secondary-161116.png',
      accessibilityText: 'Blue Grey Coffee Color',
    },
    display: 'WHITE',
  },
};

// Handle the Dialogflow intent named 'Default Welcome Intent'.
app.intent('Default Welcome Intent', (conv) => {
  // Asks the user's permission to know their name, for personalization.
  conv.ask(new Permission({
    context: 'Hi there, to get to know you better',
    permissions: 'NAME',
  }));
});

// Handle the Dialogflow intent named 'actions_intent_PERMISSION'. If user
// agreed to PERMISSION prompt, then boolean value 'permissionGranted' is true.
app.intent('actions_intent_PERMISSION', (conv, params, permissionGranted) => {
  if (!permissionGranted) {
    // If the user denied our request, go ahead with the conversation.
    conv.ask(`OK, no worries. What's your favorite color?`);
    conv.ask(new Suggestions('Blue', 'Red', 'Green'));
  } else {
    // If the user accepted our request, store their name in
    // the 'conv.data' object for the duration of the conversation.
    conv.data.userName = conv.user.name.display;
    conv.ask(`Thanks, ${conv.data.userName}. What's your favorite color?`);
    conv.ask(new Suggestions('Blue', 'Red', 'Green'));
  }
});

// Handle the Dialogflow intent named 'favorite color'.
// The intent collects a parameter named 'color'.
app.intent('favorite color', (conv, {color}) => {
  const luckyNumber = color.length;
  const audioSound = 'https://actions.google.com/sounds/v1/cartoon/clang_and_wobble.ogg';
  if (conv.data.userName) {
    // If we collected user name previously, address them by name and use SSML
    // to embed an audio snippet in the response.
    conv.ask(`<speak>${conv.data.userName}, your lucky number is ` +
      `${luckyNumber}.<audio src="${audioSound}"></audio> ` +
      `Would you like to hear some fake colors?</speak>`);
    conv.ask(new Suggestions('Yes', 'No'));
  } else {
    conv.ask(`<speak>Your lucky number is ${luckyNumber}.` +
      `<audio src="${audioSound}"></audio> ` +
      `Would you like to hear some fake colors?</speak>`);
    conv.ask(new Suggestions('Yes', 'No'));
  }
});

// Handle the Dialogflow intent named 'favorite fake color'.
// The intent collects a parameter named 'fakeColor'.
app.intent('favorite fake color', (conv, {fakeColor}) => {
  // Present user with the corresponding basic card and end the conversation.
  conv.close(`Here's the color`, new BasicCard(colorMap[fakeColor]));
});

// Set the DialogflowApp object to handle the HTTPS POST request.
exports.dialogflowFirebaseFulfillment = functions.https.onRequest(app);