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我已经设法在 V1 DialogflowApp 中一个接一个地成功调用这 2 个方法（geocoder.reverse、timezone.data），但我现在正在升级到 V2，并且似乎无法正确调用这两个异步方法。请帮忙。我分别使用这些包

  • 节点地理编码器：^3.22.0

  • 节点谷歌时区：^0.1.1

         const options = { provider: 'google', httpAdapter: 'https', apiKey: googleApi, formatter: 'json'};
     const geocoder = NodeGeocoder(options);
     const timezone = require('node-google-timezone');

app.intent('saving_prompt', (conv) => {
        if (conv.data.area) {       
           const deviceCoordinatesStart = conv.device.location.coordinates;
           const latitudeValueStart = deviceCoordinatesStart.latitude;
           const longitudeValueStart = deviceCoordinatesStart.longitude;
           let start = moment(); //Start time in UTC, you could also use dateTime()
           let startTz = momentTz(); //used because of getting the Timezone
           const timestamp = 1402629305; // Just a dud placeholder to fulfil timezone function

    //GEOLOCATION REVERSAL (METHOD 1)
    geocoder.reverse({lat:latitudeValueStart, lon:longitudeValueStart}, (err, res) => {
        if (err) {
            console.log(err);
        }
        let startLocation = res[0].administrativeLevels.level1long; 
        conv.data.startLocation = startLocation;

            //GETTING LOCAL TIMEZONE FROM LAT/LONG AND TIMESTAMP (METHOD 2)
            timezone.data(latitudeValueStart, longitudeValueStart, timestamp, (err, tz) => { 
                if (err) {
                    console.log(err);
                    }
                var zoneHolder = tz.raw_response.timeZoneId;  
                const localTime = startTz.tz(zoneHolder).format('LLL'); 
                conv.data.localTime = localTime; 
                app.ask('Your race starts by ' + localTime + 'at' + startLocation);
                conv.ask(new Suggestions('End Race'));
            });
    });
} else {  //Returned if permission not granted
        conv.ask('You do not have your location on. Say "Locate me", to retrieve your location');
        conv.ask(new Suggestions(['Locate me', 'Exit']));

}
});

//创建函数以获取没有“node-google-timezone”包的时区

function callTimezoneApi(lat, lon) {
    return new Promise((resolve, reject) => {
         let path = '/maps/api/timezone/json?location=' + lat +
          ',' + lon + '&timestamp=' + ts + '&key=' + googleApi;
         console.log('API Request: ' + host + path);
         // Make the HTTP request to get the weather
         http.get({
          host: host,
          path: path
         }, (res) => {
              let body = ''; // var to store the response chunks
              res.on('data', (d) => {
               body += d;
              }); // store each response chunk
              res.on('end', () => {
                   let response = JSON.parse(body);
                   let zoneHolder = response.timeZoneId;
                   let startTz = momentTz(); //used in fulfilling the Timezone
                   const localTime = startTz.tz(zoneHolder).format('LLL');
                   console.log(localTime);
                   return resolve(localTime);
              });
          res.on('error', (error) => {reject(error);});
        });
    });
}
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1 回答 1

2

如果你使用 Node 8，你可以使用 async/await 来解开嵌套的回调结构。它将确保您的异步调用在继续下一个调用之前完成，该调用依赖于另一个异步值。

app.intent('saving_prompt', async (conv) => {
    if (conv.data.area) {
        const deviceCoordinatesStart = conv.device.location.coordinates;
        const latitudeValueStart = deviceCoordinatesStart.latitude;
        const longitudeValueStart = deviceCoordinatesStart.longitude;
        let start = moment(); //Start time in UTC, you could also use dateTime()
        let startTz = momentTz(); //used because of getting the Timezone
        const timestamp = 1402629305; // Just a dud placeholder to fulfil timezone function

        const startLocation = await new Promise((resolve, reject) => {
            geocoder.reverse({ lat: latitudeValueStart, lon: longitudeValueStart }, (err, res) => {
                if (err) {
                    console.log(err);
                    reject(err);
                } else {
                    resolve(res[0].administrativeLevels.level1long);
                }
            });
        });

        const localTime = await new Promise((resolve, reject) => {
            timezone.data(latitudeValueStart, longitudeValueStart, timestamp, (err, tz) => {
                if (err) {
                    console.log(err);
                    reject(err);
                } else {
                    var zoneHolder = tz.raw_response.timeZoneId;
                    resolve(startTz.tz(zoneHolder).format('LLL'));
                }
            });
        });

        app.ask('Your race starts by ' + localTime + 'at' + startLocation);
        conv.ask(new Suggestions('End Race'));
    } else {  //Returned if permission not granted
        conv.ask('You do not have your location on. Say "Locate me", to retrieve your location');
        conv.ask(new Suggestions(['Locate me', 'Exit']));

    }
});
于 2018-12-13T01:46:32.367 回答