/// <summary>
/// Executes a file download for a <see cref="FileRevision"/>
/// </summary>
/// <param name="downloadFileViewModel">The <see cref="IDownloadFileViewModel"/></param>
/// <param name="fileRevision">The <see cref="FileRevision"/></param>
/// <returns>An awaitable <see cref="Task"/></returns>
public async Task ExecuteDownloadFile(IDownloadFileViewModel downloadFileViewModel, FileRevision fileRevision)
{
if (fileRevision != null)
{
downloadFileViewModel.LoadingMessage = "Downloading";
var cancelEnabledInterval = Observable.Interval(TimeSpan.FromMilliseconds(250));
var subscription = cancelEnabledInterval.Subscribe(_ => { downloadFileViewModel.IsCancelButtonVisible = downloadFileViewModel.Session.CanCancel(); });
downloadFileViewModel.IsBusy = true;
try
{
await fileRevision.DownloadFile(downloadFileViewModel.Session);
}
catch (Exception ex)
{
if (ex is OperationCanceledException || ex.InnerException is TaskCanceledException)
{
this.messageBoxService.Show($"Downloading {fileRevision.Name} was cancelled", "Download cancelled", MessageBoxButton.OK, MessageBoxImage.Exclamation);
}
else
{
Logger.Error(ex, $"Downloading {fileRevision.Name} caused an error");
this.messageBoxService.Show($"Downloading {fileRevision.Name} caused an error: {ex.Message}", "Download failed", MessageBoxButton.OK, MessageBoxImage.Error);
}
}
finally
{
subscription.Dispose();
downloadFileViewModel.LoadingMessage = "";
downloadFileViewModel.IsCancelButtonVisible = false;
downloadFileViewModel.IsBusy = false;
}
}
}
/// <summary>
/// Cancels a file download
/// </summary>
/// <param name="downloadFileViewModel">The <see cref="IDownloadFileViewModel"/></param>
public void CancelDownloadFile(IDownloadFileViewModel downloadFileViewModel)
{
if (downloadFileViewModel.Session.CanCancel())
{
downloadFileViewModel.Session.Cancel();
}
}
/// <summary>
/// Executes a file download for a <see cref="File"/>
/// </summary>
/// <param name="downloadFileViewModel">The <see cref="IDownloadFileViewModel"/></param>
/// <param name="file">The <see cref="File"/></param>
/// <returns>An awaitable <see cref="Task"/></returns>
public async Task ExecuteDownloadFile(IDownloadFileViewModel downloadFileViewModel, File file)
{
await this.ExecuteDownloadFile(downloadFileViewModel, file.FileRevision.OrderByDescending(x => x.CreatedOn).FirstOrDefault());
}
