Question

我正在尝试为Alexa创建一项技能，该技能可以根据我选择的tg的类别来复制.mp3文件。我声明自己从未使用过node.js，并且看过一门有关如何创建alexa技能的课程。到目前为止，我已经创建了该技能的框架，并且创建了一个database.json文件，其中包含带有链接的各种新闻类别。

INDEX.JS

const Alexa = require('ask-sdk-core');
const database = require('./database'); 

function getCategoryStreamUrl(name) { 
    let category = database.find(e => e.name === name);
    if (category !== null && category !== undefined) {
        return category.StreamUrl;
    } else {
        return "";
    }
}

function getCategoryUpdateDate(name) { 
    let category = database.find(e => e.name === name);
    if (category !== null && category !== undefined) {
        return category.UpdateDate;
    } else {
        return "";
    }
}

const LaunchRequestHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'LaunchRequest';
    },
    handle(handlerInput) {
        const speakOutput = 'Welcome, with this skill you can listen to our TG. You can choose a category or say Help.';
        const repromptOutput = 'You can choose a category or say Help. What do you want to do?'
        return handlerInput.responseBuilder
            .speak(speakOutput)
            .reprompt(repromptOutput)
            .getResponse();
    }
};
const ScegliCategoriaIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && Alexa.getIntentName(handlerInput.requestEnvelope) === 'ScegliCategoriaIntent';
    },
    handle(handlerInput) {
        const speakOutput = 'The TGs available are: Political, Lazio, Environment, Health, School, Pediatrics, Rehabilitation, Agriculture, Psychology and Youth. Which do you want to hear?'
        return handlerInput.responseBuilder
            .speak(speakOutput)
            .reprompt(repromptOutput)
            .getResponse();
    }
};
 const CategoriaIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && Alexa.getIntentName(handlerInput.requestEnvelope) === 'CategoriaIntent';
    },
    handle(handlerInput) {
        const filledSlots = handlerInput.requestEnvelope.request.intent.slots;
        const slotValues = getSlotValues(filledSlots);

        console.log("CategoriaIntentHandler >>>>>>>>>>>>>>>>");
        console.log(slotValues);

        const categoryName = slotValues["category"].synonym
        const categoryStreamUrl = getCategoryStreamUrl(categoryName);
        const categoryUpdateDate = getCategoryUpdateDate(categoryName);

        var speakOutput = "";
        if (categoryStreamUrl !== "") {
            speakOutput = "You have chosen the TG " + categoryName + ". The TG was updated on " + categoryUpdateDate + ". " + categoryStreamUrl + ". If you want to hear other news, name another TG or you can say STOP to close this skill.";
        } else {
            speakOutput = "I'm sorry, the selected TG is not available. You can say the name of another TG or 'categories' to hear the list of available categories. What do you want to do?";
        }

        return handlerInput.responseBuilder
            .speak(speakOutput)
            .reprompt("If you want to hear more news, say the name of another TG. You can say 'categories' to listen to the list of available categories or you can say STOP to close this skill. What do you want to do?")
            .getResponse();
    }
};
const HelpIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && Alexa.getIntentName(handlerInput.requestEnvelope) === 'AMAZON.HelpIntent';
    },
    handle(handlerInput) {
        const speakOutput = "You can say 'categories' to listen to the list of available categories or you can say STOP to close this skill. What do you want to do?";
        const repromptOutput = "If you want to stop listening, say STOP."

        return handlerInput.responseBuilder
            .speak(speakOutput)
            .reprompt(repromptOutput)
            .getResponse();
    }
};
const CancelAndStopIntentHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest'
            && (Alexa.getIntentName(handlerInput.requestEnvelope) === 'AMAZON.CancelIntent'
                || Alexa.getIntentName(handlerInput.requestEnvelope) === 'AMAZON.StopIntent');
    },
    handle(handlerInput) {
        const speakOutput = "Goodbye!";
        return handlerInput.responseBuilder
            .speak(speakOutput)
            .getResponse();
    }
};
const SessionEndedRequestHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'SessionEndedRequest';
    },
    handle(handlerInput) {
        // Any cleanup logic goes here.
        return handlerInput.responseBuilder.getResponse();
    }
};

// The intent reflector is used for interaction model testing and debugging.
// It will simply repeat the intent the user said. You can create custom handlers
// for your intents by defining them above, then also adding them to the request
// handler chain below.
const IntentReflectorHandler = {
    canHandle(handlerInput) {
        return Alexa.getRequestType(handlerInput.requestEnvelope) === 'IntentRequest';
    },
    handle(handlerInput) {
        const intentName = Alexa.getIntentName(handlerInput.requestEnvelope);
        const speakOutput = `You just triggered ${intentName}`;

        return handlerInput.responseBuilder
            .speak(speakOutput)
            //.reprompt('add a reprompt if you want to keep the session open for the user to respond')
            .getResponse();
    }
};

// Generic error handling to capture any syntax or routing errors. If you receive an error
// stating the request handler chain is not found, you have not implemented a handler for
// the intent being invoked or included it in the skill builder below.
const ErrorHandler = {
    canHandle() {
        return true;
    },
    handle(handlerInput, error) {
        console.log(`~~~~ Error handled: ${error.stack}`);
        const speakOutput = `I'm sorry I did not understand. Say 'Help' to know the available commands.`;

        return handlerInput.responseBuilder
            .speak(speakOutput)
            .reprompt(speakOutput)
            .getResponse();
    }
};

function getSlotValues (filledSlots) {

    let slotValues = {}; //

    console.log('The filled slots: ' + JSON.stringify(filledSlots));
    Object.keys(filledSlots).forEach(function(item) {

    var name = filledSlots[item].name;

    if(filledSlots[item]&&
        filledSlots[item].resolutions &&
        filledSlots[item].resolutions.resolutionsPerAuthority[0] &&
        filledSlots[item].resolutions.resolutionsPerAuthority[0].status &&
        filledSlots[item].resolutions.resolutionsPerAuthority[0].status.code ) {

        switch (filledSlots[item].resolutions.resolutionsPerAuthority[0].status.code) {
            case "ER_SUCCESS_MATCH": 
                slotValues[name] = {
                    "synonym": filledSlots[item].value,
                    "resolved": filledSlots[item].resolutions.resolutionsPerAuthority[0].values[0].value.name,
                    "isValidated": true
                };
                break;
            case "ER_SUCCESS_NO_MATCH": 
                slotValues[name] = {
                    "synonym": filledSlots[item].value,
                    "resolved": filledSlots[item].value,
                    "isValidated":false
                };
                break;
            }
        } else { 
            slotValues[name] = {
                "synonym": filledSlots[item].value,
                "resolved": filledSlots[item].value,
                "isValidated": false
            };
        }
    },this);
    return slotValues;
}

// The SkillBuilder acts as the entry point for your skill, routing all request and response
// payloads to the handlers above. Make sure any new handlers or interceptors you've
// defined are included below. The order matters - they're processed top to bottom.
exports.handler = Alexa.SkillBuilders.custom()
    .addRequestHandlers(
        LaunchRequestHandler,
        ScegliCategoriaIntentHandler,
        CategoriaIntentHandler,
        HelpIntentHandler,
        CancelAndStopIntentHandler,
        SessionEndedRequestHandler,
        IntentReflectorHandler, // make sure IntentReflectorHandler is last so it doesn't override your custom intent handlers
    )
    .addErrorHandlers(
        ErrorHandler,
    )
    .lambda();

DATABASE.JSON

[
    {
        "uid":"ID",
        "updateDate": "DATA",
        "name": "NAME SLOT",
        "titleText": "TG 01",
        "mainText":"",
        "streamUrl":"https://www.mysite.it/tg.mp3",
        "redirectionUrl":"https://www.mysite.it/category/tg"
          },
    {
        etc_01
        },
{
        etc_02
        },
{
        etc_03
        },
]

问题是，现在它不起作用了，事实上，当我问alexa告诉我 TG 01 她告诉我：

“您选择了TG01。未定义TG。未定义。另一个TG，或者您可以说停止以关闭此技能。”

简而言之，它无法识别categoryUpdateDate或categoryStreamUrl。

我该怎么做才能解决它？

Answer 1

您在两个函数中都返回了错误的数据：

它们应该为：category.updateDate和category.streamUrl，因为您正在读取JSON文件。（也许读this guide可以更好地了解如何读取和访问JSON属性，等等。）

function getCategoryStreamUrl(name) { 
    let category = database.find(e => e.name === name);
    if (category !== null && category !== undefined) {
        return category.streamUrl;
    } else {
        return "";
    }
}

function getCategoryUpdateDate(name) { 
    let category = database.find(e => e.name === name);
    if (category !== null && category !== undefined) {
        return category.updateDate;
    } else {
        return "";
    }
}

Alexa技能：是否可以让Alexa从Alexa开发者控制台-Alexa托管播放.mp3？

1 个答案: