private async Task <MetaData> GetMetaData(bool forceServerRefresh = false)
{
if (forceServerRefresh && _metaLoadingTask != null && !_metaLoadingTask.IsCompleted && !_metaLoadingTask.IsFaulted && !_metaLoadingTask.IsCanceled)
{
return(await _metaLoadingTask);
}
_metaLoadingTask = Task.Run(async() =>
{
Debug.WriteLine("[MainVm] GetMetaData (forcerefresh={0})", forceServerRefresh);
if (!forceServerRefresh)
{
var offlineMetaData = await GetOfflineMetaData();
if (offlineMetaData != null)
{
Debug.WriteLine("[MainVm] GetMetaData (forcerefresh={0}): found offline data",
forceServerRefresh);
return(offlineMetaData);
}
}
if (!InternetAvailable)
{
Debug.WriteLine("[MainVm] GetMetaData (forcerefresh={0}): internet not available, returning null",
forceServerRefresh);
return(null);
}
Debug.WriteLine("[MainVm] GetMetaData (forcerefresh={0}): perform request", forceServerRefresh);
MetaData metaData;
try
{
metaData = await _client.GetMetaDataAsync();
}
catch (ApiException e)
{
_exceptionService.HandleApiExceptionForMetaData(e);
return(null);
}
Debug.WriteLine("[MainVm] GetMetaData (forcerefresh={0}): got response", forceServerRefresh);
_metaDataIsOnlineData = true;
_storage.SaveMetaData(metaData);
UpdateServiceData();
return(metaData);
});
return(await _metaLoadingTask);
}