Styjun

/* ```````````````Index.js```````````````*/

const Alexa = require('ask-sdk');
const dbHelper = require('./helpers/dbHelper');
const GENERAL_REPROMPT = "What would you like to do?";
const dynamoDBTableName = "FORGETABLE_THINGS";
const LaunchRequestHandler = 
 canHandle(handlerInput) 
 return handlerInput.requestEnvelope.request.type === 'LaunchRequest';
 ,
 handle(handlerInput) 
 const speechText = 'Hello there. What is your favourite thing? You can say add itemname to add your item or say get to get your items.';
 const repromptText = 'What would you like to do? You can say HELP to get available options';

 return handlerInput.responseBuilder
 .speak(speechText)
 .reprompt(repromptText)
 .getResponse();
 ,
;

const InProgressAddItemIntentHandler = 
 canHandle(handlerInput) 
 const request = handlerInput.requestEnvelope.request;
 return request.type === 'IntentRequest' &&
 request.intent.name === 'AddItemIntent' &&
 request.dialogState !== 'COMPLETED';
 ,
 handle(handlerInput) 
 const currentIntent = handlerInput.requestEnvelope.request.intent;
 return handlerInput.responseBuilder
 .addDelegateDirective(currentIntent)
 .getResponse();
 


const AddItemIntentHandler = 
 canHandle(handlerInput) 
 return handlerInput.requestEnvelope.request.type === 'IntentRequest'
 && handlerInput.requestEnvelope.request.intent.name === 'AddItemIntent';
 ,
 async handle(handlerInput) 
 const responseBuilder = handlerInput;
 const userID = handlerInput.requestEnvelope.context.System.user.userId;
 const slots = handlerInput.requestEnvelope.request.intent.slots;
 const itemValue = slots.itemValue.value;
 const location = slots.location.value;
 return dbHelper.addItem(itemValue, location, userID)
 .then((data) => 
 const speechText = `You have added $itemValue, placed at $location. You can say add to add another one or remove to remove item`;
 return responseBuilder
 .speak(speechText)
 .reprompt(GENERAL_REPROMPT)
 .getResponse();
 )
 .catch((err) => 
 console.log("Error occured while saving it", err);
 const speechText = "we cannot save your item right now. Try again!"
 return responseBuilder
 .speak(speechText)
 .getResponse();
 )
 ,
;

const GetItemIntentHandler = 
 canHandle(handlerInput) 
 return handlerInput.requestEnvelope.request.type === 'IntentRequest'
 && handlerInput.requestEnvelope.request.intent.name === 'GetItemIntent';
 ,
 async handle(handlerInput) 
 const responseBuilder = handlerInput;
 //const userID = handlerInput.requestEnvelope.context.System.user.userId; 
 const itemName= slots.itemValue.value;
 return dbHelper.getItem(itemName)
 .then((data) => 
 var speechText = "Your items are "
 if (data.length == 0) 
 speechText = "You do not have any favourite item yet, add item by saying add itemname "
 else 
 const datas = data.map(e => e.itemName + " " + e.Location);
 speechText += datas.join(" ,")
 
 return responseBuilder
 .speak(speechText)
 .reprompt(GENERAL_REPROMPT)
 .getResponse();
 )
 .catch((err) => 
 const speechText = "we cannot get your item right now. Try again!"
 return responseBuilder
 .speak(speechText)
 .getResponse();
 )
 


const InProgressRemoveItemIntentHandler = 
 canHandle(handlerInput) 
 const request = handlerInput.requestEnvelope.request;
 return request.type === 'IntentRequest' &&
 request.intent.name === 'RemoveItemIntent' &&
 request.dialogState !== 'COMPLETED';
 ,
 handle(handlerInput) 
 const currentIntent = handlerInput.requestEnvelope.request.intent;
 return handlerInput.responseBuilder
 .addDelegateDirective(currentIntent)
 .getResponse();
 


const RemoveItemIntentHandler = 
 canHandle(handlerInput) 
 return handlerInput.requestEnvelope.request.type === 'IntentRequest'
 && handlerInput.requestEnvelope.request.intent.name === 'RemoveItemIntent';
 , 
 handle(handlerInput) 
 const responseBuilder = handlerInput;
 const userID = handlerInput.requestEnvelope.context.System.user.userId; 
 const slots = handlerInput.requestEnvelope.request.intent.slots;
 const itemValue = slots.itemValue.value;
 return dbHelper.removeItem(itemValue, userID)
 .then((data) => 
 const speechText = `You have removed item with name $itemValue you can add another one by saying add`
 return responseBuilder
 .speak(speechText)
 .reprompt(GENERAL_REPROMPT)
 .getResponse();
 )
 .catch((err) => 
 const speechText = `You do not have item with name $itemValue, you can add it by saying add`
 return responseBuilder
 .speak(speechText)
 .reprompt(GENERAL_REPROMPT)
 .getResponse();
 )
 


const HelpIntentHandler = 
 canHandle(handlerInput) 
 return handlerInput.requestEnvelope.request.type === 'IntentRequest'
 && handlerInput.requestEnvelope.request.intent.name === 'AMAZON.HelpIntent';
 ,
 handle(handlerInput) 
 const speechText = 'You can introduce yourself by telling me your name';

 return handlerInput.responseBuilder
 .speak(speechText)
 .reprompt(speechText)
 .getResponse();
 ,
;

const CancelAndStopIntentHandler = 
 canHandle(handlerInput) 
 return handlerInput.requestEnvelope.request.type === 'IntentRequest'
 && (handlerInput.requestEnvelope.request.intent.name === 'AMAZON.CancelIntent'
 ,
 handle(handlerInput) 
 const speechText = 'Goodbye!';

 return handlerInput.responseBuilder
 .speak(speechText)
 .getResponse();
 ,
;

const SessionEndedRequestHandler = 
 canHandle(handlerInput) 
 return handlerInput.requestEnvelope.request.type === 'SessionEndedRequest';
 ,
 handle(handlerInput) 
 console.log(`Session ended with reason: $handlerInput.requestEnvelope.request.reason`);

 return handlerInput.responseBuilder.getResponse();
 ,
;

const ErrorHandler = 
 canHandle() 
 return true;
 ,
 handle(handlerInput, error) 
 console.log(`Error handled: $error.message`);

 return handlerInput.responseBuilder
 .speak('Sorry, I can't understand the command. Please say again.')
 .reprompt('Sorry, I can't understand the command. Please say again.')
 .getResponse();
 ,
;

const skillBuilder = Alexa.SkillBuilders.standard();

exports.handler = skillBuilder
 .addRequestHandlers(
 LaunchRequestHandler,
 InProgressAddItemIntentHandler,
 AddItemIntentHandler,
 GetItemIntentHandler,
 InProgressRemoveItemIntentHandler,
 RemoveItemIntentHandler,
 HelpIntentHandler,
 CancelAndStopIntentHandler,
 SessionEndedRequestHandler
 )
 .addErrorHandlers(ErrorHandler)
 .withTableName(dynamoDBTableName)
 .withAutoCreateTable(true)
 .lambda();

/*```````````dbHelper.js`````````````*/
var AWS = require("aws-sdk");
AWS.config.update(
 region: "us-east-1"
);
const tableName = "FORGETABLE_THINGS";

var dbHelper = function() ;
var docClient = new AWS.DynamoDB.DocumentClient();

dbHelper.prototype.addItem = (item, location, userID) => 
 return new Promise((resolve, reject) => 
 const params = 
 TableName: tableName,
 Item: 
 'itemName': item,
 'Location': location,
 'userId': userID,

 
 ;
 docClient.put(params, (err, data) => 
 if (err) 
 console.log("Unable to insert =>", JSON.stringify(err))
 return reject("Unable to insert");
 
 console.log("Saved Data, ", JSON.stringify(data));
 resolve(data);
 );
 );


dbHelper.prototype.getItem = (userID) => 
 return new Promise((resolve, reject) => 
 const params = 
 TableName: tableName,
 KeyConditionExpression: "#userID = :user_id",
 ExpressionAttributeNames: 
 "#userID": "userId"
 "itemName": "itemName"
 ,
 ExpressionAttributeValues: 
 ":user_id": userID

 
 
 docClient.query(params, (err, data) => 
 if (err) 
 console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
 return reject(JSON.stringify(err, null, 2))
 
 console.log("GetItem succeeded:", JSON.stringify(data, null, 2));
 resolve(data.Items)

 )
 );


dbHelper.prototype.removeItem = (item, userID) => 
 return new Promise((resolve, reject) => 
 const params = 
 TableName: tableName,
 Key: 
 "userId": userID,
 "itemName": item
 ,
 ConditionExpression: "attribute_exists(itemName)"
 
 docClient.delete(params, function(err, data) 
 if (err) 
 console.error("Unable to delete item. Error JSON:", JSON.stringify(err, null, 2));
 return reject(JSON.stringify(err, null, 2));
 
 console.log(JSON.stringify(err));
 console.log("DeleteItem succeeded:", JSON.stringify(data, null, 2));
 resolve();
 )
 );
;

module.exports = new dbHelper();