index.js

'use strict'
const Alexa = require('alexa-sdk')
var stringSimilarity = require('string-similarity')

// =========================================================================================================================================
// TODO: The items below this comment need your attention
// =========================================================================================================================================

// Replace with your app ID (OPTIONAL).  You can find this value at the top of your skill's page on http://developer.amazon.com.
// Make sure to enclose your value in quotes, like this:  const APP_ID = "amzn1.ask.skill.bb4045e6-b3e8-4133-b650-72923c5980f1";
const APP_ID = '<APP_ID Here>'

// This function returns a descriptive sentence about your data.
function getSpeechDescription (item) {
  let sentence = item.Explanation
  return sentence
}

// This function returns the one question. The counter is the index value of question from the set of 10, to be asked.
function getQuestion (counter, item) {
  return ' Here is your ' + counter + 'th question. ' + item.Question + ' ' + item.Options + '. '
}

// This is the function that returns an answer to your user during the quiz. 
function getAnswer (item) {
  return ' The answer is ' + item.Answer + '. ' + item.Explanation + '. '
}

// This is a list of positive speechcons that this skill will use when a user gets a correct answer.  For a full list of supported
// speechcons, go here: https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/speechcon-reference
const speechConsCorrect = ['All righty', 'Bingo', 'Cheers', 'Hurray', 'Righto', 'Well done', 'Yay']

// This is a list of negative speechcons that this skill will use when a user gets an incorrect answer.  For a full list of supported
// speechcons, go here: https://developer.amazon.com/public/solutions/alexa/alexa-skills-kit/docs/speechcon-reference
const speechConsWrong = ['Argh', 'Aw man', 'Eek', 'Oh boy', 'Oh dear', 'Oof', 'Ouch', 'Uh oh', 'Yikes']

// This is the welcome message for when a user starts the skill without a specific intent.
const WELCOME_MESSAGE = 'Welcome to Everyday Quiz Game! Are you ready to take the quiz?'

// This is the message a user will hear when they start a quiz.
const START_QUIZ_MESSAGE = 'OK. I will ask you 10 questions for you today. Your answer should be a sentance like this: THE ANSWER IS DONALD TRUMP. '

// This is the message a user will hear when they try to cancel or stop the skill, or when they finish a quiz.
const EXIT_SKILL_MESSAGE = "Thank you for playing the Quiz Game!  Let's play again soon!"

// This is the message a user will hear after they ask (and hear) about a specific data element.
const REPROMPT_SPEECH = 'Test your knowledge by asking me to Start a Quiz.'

// This is the message a user will hear when they ask Alexa for help in your skill.
const HELP_MESSAGE = 'You can test your knowledge by asking me to Start a Quiz.'

// This is the response a user will receive when they ask about something we weren't expecting.  For example, say "pizza" to your
// skill when it starts.  This is the response you will receive.
function getBadAnswer (item) {
  return "I'm sorry. " + item + ' is not something I know very much about in this skill. ' + HELP_MESSAGE
}

// This is the message a user will receive after each question of a quiz.  It reminds them of their current score.
function getCurrentScore (score, counter) {
  return ' Your current score is ' + score + ' out of ' + counter + '. '
}

// This is the message a user will receive after they complete a quiz.  It tells them their final score.
function getFinalScore (score, counter) {
  return ' Your final score is ' + score + ' out of ' + counter + '. '
}

// =========================================================================================================================================
// Editing anything below this line might break your skill.
// =========================================================================================================================================

const states = {
  START: '_START',
  QUIZ: '_QUIZ'
}

const handlers = {
  'LaunchRequest': function () {
    this.handler.state = states.START
    this.emitWithState('Start')
  },
  'QuizIntent': function () {
    this.handler.state = states.QUIZ
    this.emitWithState('Quiz')
  },
  'AMAZON.YesIntent': function () {
    this.handler.state = states.START
    this.emitWithState('AskQuestion')
  },
  'AMAZON.NoIntent': function () {
    this.response.speak(EXIT_SKILL_MESSAGE)
    this.emit(':responseReady')
  },
  'AnswerIntent': function () {
    this.handler.state = states.START
    this.emitWithState('AnswerIntent')
  },
  'AskQuestion': function () {
    this.handler.state = states.START
    this.emitWithState('AskQuestion')
  },
  'AMAZON.HelpIntent': function () {
    this.response.speak(HELP_MESSAGE).listen(HELP_MESSAGE)
    this.emit(':responseReady')
  },
  'Unhandled': function () {
    this.handler.state = states.START
    this.emitWithState('Start')
  }
}

const startHandlers = Alexa.CreateStateHandler(states.START, {
  'Start': function () {
    this.response.speak(WELCOME_MESSAGE).listen(HELP_MESSAGE)
    this.emit(':responseReady')
  },
  'AnswerIntent': function () {
    var data = this.attributes['data']
    let item = getItem(this.event.request.intent.slots)

    if (item && item[Object.getOwnPropertyNames(data[0])[0]] !== undefined) {
      this.response.speak(getSpeechDescription(item)).listen(REPROMPT_SPEECH)
    } else {
      this.response.speak(getBadAnswer(item)).listen(getBadAnswer(item))
    }

    this.emit(':responseReady')
  },
  'QuizIntent': function () {
    this.handler.state = states.QUIZ
    this.emitWithState('Quiz')
  },
  'AskQuestion': function () {
    this.handler.state = states.QUIZ
    this.emitWithState('AskQuestion')
  },
  'AMAZON.YesIntent': function () {
    this.handler.state = states.QUIZ
    this.emitWithState('Quiz')
  },
  'AMAZON.NoIntent': function () {
    this.response.speak(EXIT_SKILL_MESSAGE)
    this.emit(':responseReady')
  },
  'AMAZON.PauseIntent': function () {
    this.response.speak(EXIT_SKILL_MESSAGE)
    this.emit(':responseReady')
  },
  'AMAZON.StopIntent': function () {
    this.response.speak(EXIT_SKILL_MESSAGE)
    this.emit(':responseReady')
  },
  "AMAZON.CancelIntent": function() {
    this.response.speak(EXIT_SKILL_MESSAGE);
    this.emit(":responseReady");
  },
  'AMAZON.HelpIntent': function () {
    this.response.speak(HELP_MESSAGE).listen(HELP_MESSAGE)
    this.emit(':responseReady')
  },
  'Unhandled': function () {
    this.emitWithState('Start')
  }
})

const quizHandlers = Alexa.CreateStateHandler(states.QUIZ, {
  'Quiz': function () {
    var d = new Date()
    var n = d.getDay()
    var data = require('./' + n + '.json')

    this.attributes['data'] = data
    this.attributes['response'] = ''
    this.attributes['counter'] = 0
    this.attributes['quizscore'] = 0
    this.emitWithState('AskQuestion')
  },
  'AskQuestion': function () {
    try {
      var data = this.attributes['data']
      let item = data[this.attributes['counter']]

      this.attributes['answered'] = false
      this.attributes['quizitem'] = item
      this.attributes['counter']++

      let question = getQuestion(this.attributes['counter'], item)
      if (this.attributes['counter'] === 1) {
        question = START_QUIZ_MESSAGE + ' ' + question
      }
      if (this.attributes['counter'] <= 10) {
        this.emit(':ask', question, question)
      } else {
        response += getFinalScore(this.attributes['quizscore'], this.attributes['counter'])
        speechOutput = response + ' ' + EXIT_SKILL_MESSAGE

        this.response.speak(speechOutput)
        this.emit(':responseReady')
      }
    } catch (ex) {
       this.emit(':tell', EXIT_SKILL_MESSAGE)
    }
  },
  'AnswerIntent': function () {
    let response = ''
    let speechOutput = ''
    let item = this.attributes['quizitem']
    
    try {
      let correct = compareSlots(this.event.request.intent.slots, item)

      if (correct) {
        response = getSpeechCon(true)
        if (this.attributes['quizscore'] < this.attributes['counter'] && this.attributes['answered'] === false) {
          this.attributes['quizscore']++
          this.attributes['answered'] = true
        }
      } else {
        response = getSpeechCon(false)
        this.attributes['answered'] = true
      }

      response += getAnswer(item)

      if (this.attributes['counter'] < 10) {
        response += getCurrentScore(this.attributes['quizscore'], this.attributes['counter'])

        this.attributes['response'] = response
        this.emit(':ask', response + '  Can we go to the next question?')
      } else {
        response += getFinalScore(this.attributes['quizscore'], this.attributes['counter'])
        speechOutput = response + ' ' + EXIT_SKILL_MESSAGE

        this.response.speak(speechOutput)
        this.emit(':responseReady')
      }
    } catch(ex) {
      this.emit(':ask', 'Please say your answer as a sentance. For example say like this: the answer is Donald Trump')
    }
  },

  'AMAZON.RepeatIntent': function () {
    let question = getQuestion(this.attributes['counter'], this.attributes['quizproperty'], this.attributes['quizitem'])
    this.response.speak(question).listen(question)
    this.emit(':responseReady')
  },
  'AMAZON.StartOverIntent': function () {
    this.emitWithState('Quiz')
  },
  'AMAZON.YesIntent': function () {
    this.emitWithState('AskQuestion')
  },
  'AMAZON.NoIntent': function () {
    this.response.speak(EXIT_SKILL_MESSAGE)
    this.emit(':responseReady')
  },
  'AMAZON.StopIntent': function () {
    this.response.speak(EXIT_SKILL_MESSAGE)
    this.emit(':responseReady')
  },
  'AMAZON.PauseIntent': function () {
    this.response.speak(EXIT_SKILL_MESSAGE)
    this.emit(':responseReady')
  },
  "AMAZON.CancelIntent": function() {
    this.response.speak(EXIT_SKILL_MESSAGE);
    this.emit(":responseReady");
  },
  'AMAZON.HelpIntent': function () {
    this.response.speak(HELP_MESSAGE).listen(HELP_MESSAGE)
    this.emit(':responseReady')
  },
  'Unhandled': function () {
    this.emitWithState('AnswerIntent')
  }
})

function compareSlots (slots, item) {
  var value = item.Answer
  var option = item.answerOption
  var optionAnswer = 'option' + ' ' + item.answerOption

  var requestSlotvalue = slots.Answer.value

  var similarity1 = stringSimilarity.compareTwoStrings(requestSlotvalue.toString().toLowerCase(), value.toString().toLowerCase())

  if (requestSlotvalue.toString().toLowerCase() === option.toString().toLowerCase()) {
    var similarity2 = true
  }
  if (requestSlotvalue.toString().toLowerCase() === optionAnswer.toString().toLowerCase()) {
    var similarity3 = true
  }

  if (similarity1 >= 0.6 || similarity2 === true || similarity3 === true) {
    return true
  } else {
    return false
  }
}

function getRandom (min, max) {
  return Math.floor(Math.random() * (max - min + 1) + min)
}

function getItem (slots) {

  var d = new Date()
  var n = d.getDay()
  var data = require('./' + n + '.json')

  let propertyArray = Object.getOwnPropertyNames(data[0])
  let value

  for (let slot in slots) {
    if (slots[slot].value !== undefined) {
      value = slots[slot].value
      for (let property in propertyArray) {
        let item = data.filter(x => x[propertyArray[property]].toString().toLowerCase() === slots[slot].value.toString().toLowerCase())
        if (item.length > 0) {
          return item[0]
        }
      }
    }
  }
  return value
}

function getSpeechCon (type) {
  if (type) return "<say-as interpret-as='interjection'>" + speechConsCorrect[getRandom(0, speechConsCorrect.length - 1)] + "! </say-as><break strength='strong'/>"
  else return "<say-as interpret-as='interjection'>" + speechConsWrong[getRandom(0, speechConsWrong.length - 1)] + " </say-as><break strength='strong'/>"
}

exports.handler = (event, context) => {
  console.log(JSON.stringify(event, null, 2))
  const alexa = Alexa.handler(event, context)
  alexa.appId = APP_ID
  alexa.registerHandlers(handlers, startHandlers, quizHandlers)
  alexa.execute()
}