math-guru.js

/* IMPORTANT COPYRIGHT: Shaquilla Johnson - DO NOT COPY IDEA */

 // 1. Text strings =====================================================================================================
 //    Modify these strings and messages to change the behavior of your Lambda function
// SEE BOTTOM FOR INTERACTION MODEL

var speechOutput;
var reprompt;

 // 2. Skill Code =======================================================================================================
"use strict";
var Alexa = require('alexa-sdk');
var APP_ID = undefined;  // TODO replace with your app ID (OPTIONAL).
var speechOutput = '';
var handlers = {
    'LaunchRequest': function () {
        this.response
            .speak('Welcome to Math Guru. To get started, just say something like: I want to practice my 6 times tables')
            .listen('I didnt catch that. Try saying: practice my 4 times tables.')
        this.emit(':responseReady')
    },
	'AMAZON.HelpIntent': function () {
        speechOutput = '';
        reprompt = '';
        this.emit(':ask', speechOutput, reprompt);
    },
    'AMAZON.CancelIntent': function () {
        speechOutput = '';
        this.emit(':tell', speechOutput);
    },
    'AMAZON.StopIntent': function () {
        speechOutput = '';
        this.emit(':tell', speechOutput);
    },
    'SessionEndedRequest': function () {
        speechOutput = '';
        //this.emit(':saveState', true);//uncomment to save attributes to db on session end
        this.emit(':tell', speechOutput);
    },
	"AnswerIntent": function () {
		var guess = parseInt(this.event.request.intent.slots.number.value);
        var answer = parseInt(this.attributes.number) * parseInt(this.attributes.multiplier);
        var response = '';
        if( guess && answer == guess ) {
            var newMultiplier = getQuestion();
            response = 'Great job! ' + this.attributes.number + ' times ' + this.attributes.multiplier + ' is ' + answer + '. What is ' + this.attributes.number + ' times ' + newMultiplier + '?';
            this.attributes.multiplier = newMultiplier;
        } else {
            this.attributes.lives--;
            response = 'That is incorrect. You have ' + this.attributes.lives + ' lives left. Try again.';
            
            if(this.attributes.lives < 1 ) {
                response = 'That is incorrect. You lose! Say something like I want to practice my 4 times tables to start over';
            }

        }

    	this.response.speak(response).listen(response);
    	this.emit(':responseReady');
    },
	"PracticeTimestables": function () {

		var number = parseInt(this.event.request.intent.slots.number.value);
		this.attributes.number = number;
		this.attributes.multiplier = getQuestion();
		this.attributes.lives = 3;

    	//Your custom intent handling goes here
    	var response = 'Ok, lets practice your ' + number + ' times tables. What is ' + number + ' times ' + this.attributes.multiplier + '?';
        this.response.speak(response).listen(response);
        this.emit(':responseReady');
	    
	},	
	'Unhandled': function () {
        speechOutput = "The skill didn't quite understand what you wanted.  Do you want to try something else?";
        this.emit(':ask', speechOutput, speechOutput);
    }
};

function getQuestion() {
    return Math.floor(Math.random()*12);
}

exports.handler = (event, context) => {
    var alexa = Alexa.handler(event, context);
    alexa.APP_ID = APP_ID;
    // To enable string internationalization (i18n) features, set a resources object.
    //alexa.resources = languageStrings;
    alexa.registerHandlers(handlers);
	//alexa.dynamoDBTableName = 'DYNAMODB_TABLE_NAME'; //uncomment this line to save attributes to DB
    alexa.execute();
};

//    END of Intent Handlers {} ========================================================================================
// 3. Helper Function  =================================================================================================

function resolveCanonical(slot){
	//this function looks at the entity resolution part of request and returns the slot value if a synonyms is provided
    try{
		var canonical = slot.resolutions.resolutionsPerAuthority[0].values[0].value.name;
	}catch(err){
	    console.log(err.message);
	    var canonical = slot.value;
	};
	return canonical;
};

function delegateSlotCollection(){
  console.log("in delegateSlotCollection");
  console.log("current dialogState: "+this.event.request.dialogState);
    if (this.event.request.dialogState === "STARTED") {
      console.log("in Beginning");
	  var updatedIntent= null;
	  // updatedIntent=this.event.request.intent;
      //optionally pre-fill slots: update the intent object with slot values for which
      //you have defaults, then return Dialog.Delegate with this updated intent
      // in the updatedIntent property
      //this.emit(":delegate", updatedIntent); //uncomment this is using ASK SDK 1.0.9 or newer
	  
	  //this code is necessary if using ASK SDK versions prior to 1.0.9 
	  if(this.isOverridden()) {
			return;
		}
		this.handler.response = buildSpeechletResponse({
			sessionAttributes: this.attributes,
			directives: getDialogDirectives('Dialog.Delegate', updatedIntent, null),
			shouldEndSession: false
		});
		this.emit(':responseReady', updatedIntent);
		
    } else if (this.event.request.dialogState !== "COMPLETED") {
      console.log("in not completed");
      // return a Dialog.Delegate directive with no updatedIntent property.
      //this.emit(":delegate"); //uncomment this is using ASK SDK 1.0.9 or newer
	  
	  //this code necessary is using ASK SDK versions prior to 1.0.9
		if(this.isOverridden()) {
			return;
		}
		this.handler.response = buildSpeechletResponse({
			sessionAttributes: this.attributes,
			directives: getDialogDirectives('Dialog.Delegate', updatedIntent, null),
			shouldEndSession: false
		});
		this.emit(':responseReady');
		
    } else {
      console.log("in completed");
      console.log("returning: "+ JSON.stringify(this.event.request.intent));
      // Dialog is now complete and all required slots should be filled,
      // so call your normal intent handler.
      return this.event.request.intent;
    }
}


function randomPhrase(array) {
    // the argument is an array [] of words or phrases
    var i = 0;
    i = Math.floor(Math.random() * array.length);
    return(array[i]);
}
function isSlotValid(request, slotName){
        var slot = request.intent.slots[slotName];
        //console.log("request = "+JSON.stringify(request)); //uncomment if you want to see the request
        var slotValue;

        //if we have a slot, get the text and store it into speechOutput
        if (slot && slot.value) {
            //we have a value in the slot
            slotValue = slot.value.toLowerCase();
            return slotValue;
        } else {
            //we didn't get a value in the slot.
            return false;
        }
}

//These functions are here to allow dialog directives to work with SDK versions prior to 1.0.9
//will be removed once Lambda templates are updated with the latest SDK

function createSpeechObject(optionsParam) {
    if (optionsParam && optionsParam.type === 'SSML') {
        return {
            type: optionsParam.type,
            ssml: optionsParam['speech']
        };
    } else {
        return {
            type: optionsParam.type || 'PlainText',
            text: optionsParam['speech'] || optionsParam
        };
    }
}

function buildSpeechletResponse(options) {
    var alexaResponse = {
        shouldEndSession: options.shouldEndSession
    };

    if (options.output) {
        alexaResponse.outputSpeech = createSpeechObject(options.output);
    }

    if (options.reprompt) {
        alexaResponse.reprompt = {
            outputSpeech: createSpeechObject(options.reprompt)
        };
    }

    if (options.directives) {
        alexaResponse.directives = options.directives;
    }

    if (options.cardTitle && options.cardContent) {
        alexaResponse.card = {
            type: 'Simple',
            title: options.cardTitle,
            content: options.cardContent
        };

        if(options.cardImage && (options.cardImage.smallImageUrl || options.cardImage.largeImageUrl)) {
            alexaResponse.card.type = 'Standard';
            alexaResponse.card['image'] = {};

            delete alexaResponse.card.content;
            alexaResponse.card.text = options.cardContent;

            if(options.cardImage.smallImageUrl) {
                alexaResponse.card.image['smallImageUrl'] = options.cardImage.smallImageUrl;
            }

            if(options.cardImage.largeImageUrl) {
                alexaResponse.card.image['largeImageUrl'] = options.cardImage.largeImageUrl;
            }
        }
    } else if (options.cardType === 'LinkAccount') {
        alexaResponse.card = {
            type: 'LinkAccount'
        };
    } else if (options.cardType === 'AskForPermissionsConsent') {
        alexaResponse.card = {
            type: 'AskForPermissionsConsent',
            permissions: options.permissions
        };
    }

    var returnResult = {
        version: '1.0',
        response: alexaResponse
    };

    if (options.sessionAttributes) {
        returnResult.sessionAttributes = options.sessionAttributes;
    }
    return returnResult;
}

function getDialogDirectives(dialogType, updatedIntent, slotName) {
    let directive = {
        type: dialogType
    };

    if (dialogType === 'Dialog.ElicitSlot') {
        directive.slotToElicit = slotName;
    } else if (dialogType === 'Dialog.ConfirmSlot') {
        directive.slotToConfirm = slotName;
    }

    if (updatedIntent) {
        directive.updatedIntent = updatedIntent;
    }
    return [directive];
}





/* 

{
  "intents": [
    {
      "name": "AMAZON.CancelIntent",
      "samples": []
    },
    {
      "name": "AMAZON.HelpIntent",
      "samples": []
    },
    {
      "name": "AMAZON.StopIntent",
      "samples": []
    },
    {
      "name": "AnswerIntent",
      "samples": [
        "{number}",
        "i think the answer is {number}",
        "the answer is {number}",
        "is it {number}",
        "my answer is {number}",
        "i guess {number}",
        "i guess the answer is {number}",
        "maybe {number}",
        "my response is {number}"
      ],
      "slots": [
        {
          "name": "number",
          "type": "AMAZON.NUMBER",
          "samples": []
        }
      ]
    },
    {
      "name": "PracticeTimestables",
      "samples": [
        "I want to practice my {number} times tables",
        "practice the {number} times tables",
        "practice multiplications with {number}",
        "switch to {number} times table",
        "now let us practice with {number}"
      ],
      "slots": [
        {
          "name": "number",
          "type": "AMAZON.NUMBER",
          "samples": []
        }
      ]
    }
  ]
}

*/