old-tellall/backend/components/alexa.js

var alexa = require ('alexa-app');
const config = require ('../config/config');
var databaseHelper = require ('../helpers/database');

//User data for sending message, this is skill-related and will be in some skill container
var Name = null;
var Email = null;
var Message = null;
var State = 0; // states should be defined in seperate file. (Not sending message, Waiting for name, Waiting for email, Waiting for message)
//For now (this is not long term solution)
// 0 : Not sending Message
// 1 : Waiting for name
// 2 : Waiting for email
// 3 : Waiting for message

var alexaApp = new alexa.app ('saburly'); // this means we still work with one skill

module.exports = {
  init: function (express) {
    alexaApp.express ({
      expressApp: express,
    
      // verifies requests come from amazon alexa. Must be enabled for production.
      // You can disable this if you're running a dev environment and want to POST
      // things to test behavior. enabled by default.
      checkCert: false,
    
      // sets up a GET route when set to true. This is handy for testing in
      // development, but not recommended for production. disabled by default
      debug: true,
    });    
  },

  updateIntentsJSON: function () {
    databaseHelper
      .getSkill (config.SKILL_DB_ID)
      .then (skill => {
        skill.intents.map (intent => {
          alexaApp.intent (
            intent.intentName,
            {
              slots: [],
              utterances: intent.questions,
            },
            function (request, response) {
              return response.say (intent.answer).shouldEndSession (false);
            }
          );
        });

        alexaApp.launch ((request, response) => {
          return response.say (skill.invocationAnswer).shouldEndSession (false);
        });

        alexaApp.intent (
          'EmailIntentLaunch',
          {
            slots: [],
            utterances: [
              'I want to send a message',
              'I would like to send a message',
              'I would like to leave a message',
              'Leave a message',
            ],
          },
          function (request, response) {
            Name = null;
            Email = null;
            Message = null;
            State = 1;

            return response
              .say ('Ok. What is your name')
              .shouldEndSession (false);
          }
        );

        //TODO : Watch out for this intent. It will make trouble with other regular intents
        //if other intents have utterance with just one slot like {Data}
        //It should be taken care somwhere before this, to check if Email Intent is invoked
        //This is problem only if we introduce slot options for regular intents for users
        alexaApp.intent (
          'EmailIntent',
          {
            slots: {
              Name: 'AMAZON.US_FIRST_NAME',
              Email: 'AMAZON.LITERAL',
              Message: 'AMAZON.LITERAL',
              Data: 'AMAZON.LITERAL',
            },
            utterances: [
              'My name is {-|Name}',
              'I am {-|Name}',
              '{dawdw at dwd wdw|Data}',
              'My email is {wadwwdw at wadwwd wdw|Email}',
              'Send replay to {fkofkeofe at dppfam wd|Email}',
              'My message is {Quick brown fox jumps over lazy dog|Message}',
            ],
          },
          function (request, response) {
            let Data = undefined;
            try {
              if (!Name) Name = request.slot ('Name');
            } catch (e) {
              console.log ('Error. No name slot ');
              Name = undefined;
            }
            try {
              if (!Email) Email = request.slot ('Email');
            } catch (e) {
              console.log ('Error. No Email slot');
              Email = undefined;
            }
            try {
              if (!Message) Message = request.slot ('Message');
            } catch (e) {
              console.log ('Error. No Message slot');
              Message = undefined;
            }
            try {
              Data = request.slot ('Data');
            } catch (e) {
              console.log ('Error. No Data slot');
              Data = undefined;
            }
            console.log ('State : ' + State);

            //TODO : Responses could be configurable for each skill ?

            if (State === 1) {
              //Was waiting for name, so if Name is null, name is probably in Data
              if ((!Name && Data) || Name) {
                //got the name, let's continue for the email
                if (!Name) Name = Data;
                State = 2;
                return response
                  .say ('Ok ' + Name + '. What is your email ?')
                  .shouldEndSession (false);
              } else {
                //Something is wrong, ask for name again
                return response
                  .say (
                    'Sorry, I didnt understand your name. Can you say it again ?'
                  )
                  .shouldEndSession (false);
              }
            } else if (State === 2) {
              //was waiting for email, so if Email is null, email is probably in Data
              if ((!Email && Data) || Email) {
                //Got the email, first verify email and than continue to message
                if (!Email) Email = Data;
                //TODO : verify email
                State = 3;
                return response
                  .say ('Great. Whats the message ?')
                  .shouldEndSession (false);
              } else {
                //Something is wrong, ask for the email again
                return response
                  .say (
                    'Sorry, I didnt understan you email. Can you say it again ?'
                  )
                  .shouldEndSession (false);
              }
            } else if (State === 3) {
              //Was waiting for message, so if Message is null, message is probably in Data
              if ((!Message && Data) || Message) {
                //Ok, we got all informations. Exit email intent
                if (!Message) Message = Data;
                State = 0;
                //TODO : Send email
                console.log (
                  'Name : ' +
                    Name +
                    ' | Email : ' +
                    Email +
                    ' | Message :  ' +
                    Message
                );
                return response.say (
                  'Message sent. Someone will contact you ASAP'
                );
              } else {
                //Something is wrong, ask for the message again
                return response
                  .say (
                    'Sorry, I didnt understand your message. Can you say it again ?'
                  )
                  .shouldEndSession (false);
              }
            } else {
              console.log ('State strange ! ' + State);
            }
          }
        );
      })
      .catch (err => {
        console.log (err);
        alexaApp.launch ((request, response) => {
          return response.say ('Sorry, there was no skill with that name');
        });
      });
  },
};