#pragma warning disable CS1998 // Async method lacks 'await' operators and will run synchronously -- deleting local file is synchronous
public async Task Delete(string objectName, CancellationToken cancellationToken)
#pragma warning restore CS1998 // Async method lacks 'await' operators and will run synchronously
{
var path = FilesystemUtils.PreparePath(objectName, _context);
var recyclePath = _recycleContext is object?FilesystemUtils.PreparePath(objectName, _recycleContext) : null;
cancellationToken.ThrowIfCancellationRequested();
if (recyclePath is object)
{
if (Path.GetDirectoryName(path) is { } directory)
{
Directory.CreateDirectory(directory);
}
try
{
File.Move(path, recyclePath, true);
}
catch (FileNotFoundException)
{
return;
}
catch (DirectoryNotFoundException)
{
return;
}
}
else
{
try
{
File.Delete(path);
}
catch (DirectoryNotFoundException)
{
return;
}
}
var root = Path.GetDirectoryName(FilesystemUtils.PreparePath("", _context));
if (root is null)
{
return;
}
var rootLength = root.Length;
while (true)
{
if (Path.GetDirectoryName(path) is not {
} directory)
{
break;
}
cancellationToken.ThrowIfCancellationRequested();
if (Directory.EnumerateFileSystemEntries(directory).Any())
{
break;
}
var dirLength = directory.Length;
if (dirLength == rootLength)
{
break;
}
if (dirLength < rootLength)
{
throw new InvalidProgramException(FormattableString.Invariant($"Recursive deletion of directory \"{directory}\" attempted to escape root \"{root}\"."));
}
Directory.Delete(directory);
path = directory;
}
}