/// <summary>
/// Try to replace all saved files into the parent state.
/// </summary>
/// <param name="temporaryContainer"></param>
/// <param name="destinationFileSystem"></param>
/// <param name="stateStreamManager"></param>
/// <returns>If the replacement was successful.</returns>
private async Task <SaveResult> TryReplaceFiles(IFileSystem temporaryContainer, IFileSystem destinationFileSystem,
IStreamManager stateStreamManager)
{
// 1. Check that all saved files exist in the parent filesystem already or can at least be created if missing
foreach (var file in temporaryContainer.EnumeratePaths(UPath.Root))
{
if (!destinationFileSystem.FileExists(file) && !destinationFileSystem.CanCreateFiles)
{
return(new SaveResult(false, $"'{file}' did not exist in '{destinationFileSystem.ConvertPathToInternal(UPath.Root)}'."));
}
}
// 2. Set new file data into parent file system
foreach (var file in temporaryContainer.EnumeratePaths(UPath.Root))
{
try
{
var openedFile = await temporaryContainer.OpenFileAsync(file);
destinationFileSystem.SetFileData(file, openedFile);
stateStreamManager.Register(openedFile);
}
catch (Exception ex)
{
return(new SaveResult(ex));
}
}
return(SaveResult.SuccessfulResult);
}
/// <inheritdoc />
public Stream CreateTemporaryStream()
{
EnsureTemporaryDirectory(_temporaryDirectory);
var fileName = GetTemporaryName();
var file = File.Create(Path.Combine(_temporaryDirectory, fileName));
var temporaryStream = new TemporaryStream(file);
_streamManager.Register(temporaryStream);
return(temporaryStream);
}