internal void FilterItems(ItemFilter itemFilter, CancellationToken token)
{
if (!Items.Contains(_loadingStatusIndicator))
{
Items.Add(_loadingStatusIndicator);
}
_loadingStatusIndicator.Status = LoadingStatus.Loading;
// If there is another async loading process - cancel it.
var loadCts = CancellationTokenSource.CreateLinkedTokenSource(token);
Interlocked.Exchange(ref _loadCts, loadCts)?.Cancel();
try
{
if (itemFilter == ItemFilter.UpdatesAvailable)
{
ApplyUIFilterForUpdatesAvailable();
}
else
{
//Show all the items, without an Update filter.
ClearUIFilter();
}
}
finally
{
//If no items are shown in the filter, indicate in the list that no packages are found.
if (FilteredItemsCount == 0)
{
_loadingStatusIndicator.Status = LoadingStatus.NoItemsFound;
}
else
{
if (Items.Contains(_loadingStatusIndicator))
{
Items.Remove(_loadingStatusIndicator);
}
}
}
UpdateCheckBoxStatus();
LoadItemsCompleted?.Invoke(this, EventArgs.Empty);
}
private void LoadItems(PackageItemListViewModel selectedPackageItem, CancellationToken token)
{
// If there is another async loading process - cancel it.
var loadCts = CancellationTokenSource.CreateLinkedTokenSource(token);
Interlocked.Exchange(ref _loadCts, loadCts)?.Cancel();
var currentLoader = _loader;
_joinableTaskFactory.Value.RunAsync(async() =>
{
await TaskScheduler.Default;
var addedLoadingIndicator = false;
try
{
// add Loading... indicator if not present
if (!Items.Contains(_loadingStatusIndicator))
{
Items.Add(_loadingStatusIndicator);
addedLoadingIndicator = true;
}
await LoadItemsCoreAsync(currentLoader, loadCts.Token);
await _joinableTaskFactory.Value.SwitchToMainThreadAsync();
if (selectedPackageItem != null)
{
UpdateSelectedItem(selectedPackageItem);
}
}
catch (OperationCanceledException) when(!loadCts.IsCancellationRequested)
{
loadCts.Cancel();
loadCts.Dispose();
currentLoader.Reset();
await _joinableTaskFactory.Value.SwitchToMainThreadAsync();
// The user cancelled the login, but treat as a load error in UI
// So the retry button and message is displayed
// Do not log to the activity log, since it is not a NuGet error
_logger.Log(ProjectManagement.MessageLevel.Error, Resx.Resources.Text_UserCanceled);
_loadingStatusIndicator.SetError(Resx.Resources.Text_UserCanceled);
_loadingStatusBar.SetCancelled();
_loadingStatusBar.Visibility = Visibility.Visible;
}
catch (Exception ex) when(!loadCts.IsCancellationRequested)
{
loadCts.Cancel();
loadCts.Dispose();
currentLoader.Reset();
// Write stack to activity log
Mvs.ActivityLog.LogError(LogEntrySource, ex.ToString());
await _joinableTaskFactory.Value.SwitchToMainThreadAsync();
var errorMessage = ExceptionUtilities.DisplayMessage(ex);
_logger.Log(ProjectManagement.MessageLevel.Error, errorMessage);
_loadingStatusIndicator.SetError(errorMessage);
_loadingStatusBar.SetError();
_loadingStatusBar.Visibility = Visibility.Visible;
}
finally
{
if (_loadingStatusIndicator.Status != LoadingStatus.NoItemsFound &&
_loadingStatusIndicator.Status != LoadingStatus.ErrorOccurred)
{
// Ideally, After a serach, it should report its status and,
// do not keep the LoadingStatus.Loading forever.
// This is a workaround.
var emptyListCount = addedLoadingIndicator ? 1 : 0;
if (Items.Count == emptyListCount)
{
_loadingStatusIndicator.Status = LoadingStatus.NoItemsFound;
}
else
{
Items.Remove(_loadingStatusIndicator);
}
}
}
UpdateCheckBoxStatus();
LoadItemsCompleted?.Invoke(this, EventArgs.Empty);
});
}
private void LoadItems(PackageItemListViewModel selectedPackageItem, CancellationToken token)
{
// If there is another async loading process - cancel it.
var loadCts = CancellationTokenSource.CreateLinkedTokenSource(token);
Interlocked.Exchange(ref _loadCts, loadCts)?.Cancel();
var currentLoader = _loader;
_joinableTaskFactory.Value.RunAsync(async() =>
{
await TaskScheduler.Default;
try
{
await LoadItemsCoreAsync(currentLoader, loadCts.Token);
await _joinableTaskFactory.Value.SwitchToMainThreadAsync();
if (selectedPackageItem != null)
{
UpdateSelectedItem(selectedPackageItem);
}
}
catch (OperationCanceledException) when(!loadCts.IsCancellationRequested)
{
loadCts.Cancel();
loadCts.Dispose();
currentLoader.Reset();
await _joinableTaskFactory.Value.SwitchToMainThreadAsync();
// The user cancelled the login, but treat as a load error in UI
// So the retry button and message is displayed
// Do not log to the activity log, since it is not a NuGet error
_logger.Log(ProjectManagement.MessageLevel.Error, Resx.Resources.Text_UserCanceled);
_loadingStatusIndicator.SetError(Resx.Resources.Text_UserCanceled);
_loadingStatusBar.SetCancelled();
_loadingStatusBar.Visibility = Visibility.Visible;
}
catch (Exception ex) when(!loadCts.IsCancellationRequested)
{
loadCts.Cancel();
loadCts.Dispose();
currentLoader.Reset();
// Write stack to activity log
Mvs.ActivityLog.LogError(LogEntrySource, ex.ToString());
await _joinableTaskFactory.Value.SwitchToMainThreadAsync();
var errorMessage = ExceptionUtilities.DisplayMessage(ex);
_logger.Log(ProjectManagement.MessageLevel.Error, errorMessage);
_loadingStatusIndicator.SetError(errorMessage);
_loadingStatusBar.SetError();
_loadingStatusBar.Visibility = Visibility.Visible;
}
UpdateCheckBoxStatus();
LoadItemsCompleted?.Invoke(this, EventArgs.Empty);
});
}