private async Task <City> GetCity(string cityId, bool forceServerRefresh = false, MetaDataCityRow cityMetaData = null)
{
if (_cityLoading.ContainsKey(cityId) && _cityLoading[cityId] != null && !_cityLoading[cityId].IsFaulted && !_cityLoading[cityId].IsCompleted && !_cityLoading[cityId].IsCanceled)
{
if (!forceServerRefresh || _initialized)
{
return(await _cityLoading[cityId]);
}
}
_cityLoading[cityId] = Task.Run(async() =>
{
Debug.WriteLine("[MainVm] GetCity for {0} (forcerefresh={1})", cityId, forceServerRefresh);
if (!forceServerRefresh)
{
var offlineCity = await GetOfflineCityData(cityId);
if (offlineCity != null)
{
Debug.WriteLine("[MainVm] GetCity for {0} (forcerefresh={1}): found offline data", cityId,
forceServerRefresh);
return(offlineCity);
}
}
if (!InternetAvailable)
{
Debug.WriteLine(
"[MainVm] GetCity for {0} (forcerefresh={1}): internet not available, returning null", cityId,
forceServerRefresh);
return(null);
}
Debug.WriteLine("[MainVm] GetCity for {0} (forcerefresh={1}): perform request", cityId,
forceServerRefresh);
City city;
try
{
city = await _client.GetCityAsync(cityId);
}
catch (ApiException e)
{
_exceptionService.HandleApiExceptionForCityData(e, MetaData.Cities.Get(cityId));
return(null);
}
Debug.WriteLine("[MainVm] GetCity for {0} (forcerefresh={1}): got response", cityId, forceServerRefresh);
_cityHasOnlineData[cityId] = true;
await Task.Run(() =>
{
Task.Factory.StartNew(async() =>
{
await Task.Delay(4000);
_storage.SaveCityData(cityId, city);
});
Task.Factory.StartNew(async() =>
{
await Task.Delay(2000);
_voiceCommands.UpdateParkingLotList(cityMetaData ?? SelectedCity, city);
});
});
return(city);
});
return(await _cityLoading[cityId]);
}
