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@muttoni
Created April 18, 2018 15:24
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The lambda code to the Guitar Tuner skill we are building
/* This code has been generated from your interaction model
/* eslint-disable func-names */
/* eslint quote-props: ["error", "consistent"]*/
// There are three sections, Text Strings, Skill Code, and Helper Function(s).
// You can copy and paste the contents as the code for a new Lambda function, using the alexa-skill-kit-sdk-factskill template.
// This code includes helper functions for compatibility with versions of the SDK prior to 1.0.9, which includes the dialog directives.
// 1. Text strings =====================================================================================================
// Modify these strings and messages to change the behavior of your Lambda function
var speechOutput;
var reprompt;
var welcomeOutput = "Welcome to Guitar Tuner. You can ask me to play a note, like a low E, or a chord. How can I help?";
var welcomeReprompt = "You can say something like: give me a low E, or play the D string.";
// 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.emit(':ask', welcomeOutput, welcomeReprompt);
},
'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);
},
"PlayNoteIntent": function () {
var speechOutput = '';
var speechReprompt = '';
var noteSlot = resolveCanonical(this.event.request.intent.slots.note);
console.log('User requested note: ' + noteSlot);
var pitchSlot = resolveCanonical(this.event.request.intent.slots.pitch);
console.log('User requests pitch: ' + pitchSlot);
var notes = {
'a' : {
'low' : 'https://URL-to-your-bucket/a.mp3',
'high': 'https://URL-to-your-bucket/a.mp3'
},
'b' : {
'low' : 'https://URL-to-your-bucket/b.mp3',
'high': 'https://URL-to-your-bucket/b.mp3'
},
'd' : {
'low' : 'https://URL-to-your-bucket/d.mp3',
'high': 'https://URL-to-your-bucket/d.mp3'
},
'e' : {
'low' : 'https://URL-to-your-bucket/e_low.mp3',
'high': 'https://URL-to-your-bucket/e_high.mp3'
},
'g' : {
'low' : 'https://URL-to-your-bucket/g.mp3',
'high': 'https://URL-to-your-bucket/g.mp3'
}
}
var pitches = [
'low',
'high'
];
var note = '';
var pitch = '';
if(!noteSlot) {
this.emit(':ask', 'I did not hear a note. Which note do you want to hear?', 'You can say something like play me an E')
} else {
note = noteSlot.toLowerCase();
this.attributes['note'] = note;
}
if(pitchSlot) {
pitch = pitchSlot.toLowerCase();
}
if(notes[note]) {
var audio = '';
if(pitchSlot && pitches.indexOf(pitchSlot) > -1) {
pitch = pitchSlot;
} else {
pitch = 'low';
}
var audioSrc = notes[note][pitch];
speechOutput = 'Here is your note: <audio src="' + audioSrc + '" />';
speechReprompt = 'Would you like to hear it again?';
} else {
speechOutput = 'Sorry, the note you asked for is not supported yet.'
speechReprompt = 'I support: A, B, D, low E, high E, and G';
}
this.emit(":tell", speechOutput);
},
'Unhandled': function () {
speechOutput = "The skill didn't quite understand what you wanted. Do you want to try something else?";
this.emit(':ask', speechOutput, speechOutput);
}
};
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 = 'guitar-tuner'; //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];
}
@nehahnbgu
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hi,
I tried to use this code but getting an error: "There was a problem with the requested skill's response", every time I try to test it.
Can't really figure out the problem since I'm new to NodeJS. Please help.
Thanks

@karyttabahamon
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How to add a yes/no intent to this code? So it can repeat the note?

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