public override async Task DeleteAsync(DeletionOption options, CancellationToken cancellationToken = default)
{
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
cancellationToken.ThrowIfCancellationRequested();
lock (_inMemoryFileSystem.Storage)
{
switch (options)
{
case DeletionOption.Fail:
_storage.GetFolderNode(Path).Delete();
break;
case DeletionOption.IgnoreMissing:
_storage.TryGetFolderNodeAndThrowOnConflictingFile(Path)?.Delete();
break;
default:
throw new NotSupportedException(ExceptionStrings.Enum.UnsupportedValue(options));
}
}
}
public override async Task <StorageFolder> RenameAsync(
string newName,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = newName ?? throw new ArgumentNullException(nameof(newName));
if (newName.Length == 0)
{
throw new ArgumentException(ExceptionStrings.String.CannotBeEmpty(), nameof(newName));
}
if (newName.Contains(_inMemoryFileSystem.InvalidNewNameCharacters))
{
throw new ArgumentException(
ExceptionStrings.StorageFolder.NewNameContainsInvalidChar(FileSystem.PathInformation),
nameof(newName)
);
}
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
cancellationToken.ThrowIfCancellationRequested();
var destinationPath = Path.FullPath.Parent?.Join(newName) ?? FileSystem.GetPath(newName);
lock (_inMemoryFileSystem.Storage)
{
return(MoveInternal(destinationPath, options, cancellationToken));
}
}
public override Task <Stream> CreateAndOpenAsync(
bool recursive,
CreationCollisionOption options,
CancellationToken cancellationToken = default
)
{
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
return(Task.Run <Stream>(() =>
{
if (recursive)
{
Directory.CreateDirectory(_fullParentPath.ToString());
}
try
{
cancellationToken.ThrowIfCancellationRequested();
return new FileStream(_fullPath.ToString(), options.ToFileMode());
}
catch (UnauthorizedAccessException ex)
{
EnsureNoConflictingFolderExists(_fullPath.ToString(), ex);
throw;
}
}, cancellationToken));
}
public override Task <StorageFolder> CopyAsync(
StoragePath destinationPath,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = destinationPath ?? throw new ArgumentNullException(nameof(destinationPath));
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
if (!(destinationPath is PhysicalStoragePath))
{
throw new ArgumentException(
ExceptionStrings.FsCompatibility.StoragePathTypeNotSupported(),
nameof(destinationPath)
);
}
return(Task.Run(() =>
{
var fullDestinationPath = destinationPath.FullPath;
var destination = FileSystem.GetFolder(destinationPath);
var overwrite = options.ToOverwriteBool();
// Specification requires DirectoryNotFoundException if the destination parent folder
// does not exist.
if (destination.Parent is PhysicalStorageFolder destinationParent)
{
destinationParent.EnsureExists();
}
if (overwrite)
{
DeleteConflictingDestinationFolderWithoutDeletingThisFolder(fullDestinationPath.ToString());
// At this point the conflicting destination folder should be deleted.
// If that is not the case, we can assume that we are essentially copying
// the folder to the same location (because otherwise, the method above would
// have deleted the folder at the destination path).
if (Directory.Exists(fullDestinationPath.ToString()))
{
throw new IOException(ExceptionStrings.StorageFolder.CannotCopyToSameLocation());
}
}
else
{
// The CopyDirectory helper cannot easily verify that no conflicting folder exists
// at the destination. Specification requires an IOException on conflicts for the Fail option.
if (Directory.Exists(fullDestinationPath.ToString()))
{
throw new IOException(ExceptionStrings.StorageFolder.CopyConflictingFolderExistsAtDestination());
}
}
FsHelper.CopyDirectory(_fullPath.ToString(), fullDestinationPath.ToString(), cancellationToken);
return destination;
}, cancellationToken));
}
public override Task <StorageFolder> RenameAsync(
string newName,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = newName ?? throw new ArgumentNullException(nameof(newName));
if (newName.Length == 0)
{
throw new ArgumentException(ExceptionStrings.String.CannotBeEmpty(), nameof(newName));
}
if (newName.Contains(PhysicalPathHelper.InvalidNewNameCharacters))
{
throw new ArgumentException(
ExceptionStrings.StorageFolder.NewNameContainsInvalidChar(FileSystem.PathInformation),
nameof(newName)
);
}
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
var destinationPath = _fullParentPath?.Join(newName) ?? FileSystem.GetPath(newName);
return(MoveAsync(destinationPath, options, cancellationToken));
}
public override Task <StorageFile> CopyAsync(
StoragePath destinationPath,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = destinationPath ?? throw new ArgumentNullException(nameof(destinationPath));
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
if (!(destinationPath is PhysicalStoragePath))
{
throw new ArgumentException(
ExceptionStrings.FsCompatibility.StoragePathTypeNotSupported(),
nameof(destinationPath)
);
}
return(Task.Run(() =>
{
var fullDstPath = destinationPath.FullPath;
var overwrite = options.ToOverwriteBool();
#if NETCOREAPP2_0 || NETCOREAPP2_1 || NETCOREAPP2_2
// File.Copy on Unix systems AND .NET Core 2.0 - 2.2 has this weird behavior where
// no exception is thrown if the destination is a folder. When copying a file to
// a conflicting folder, the API, instead of throwing, simply moves the file *into*
// the folder. For example, assume that we copy "src/srcFile.ext" to "dst":
// |_ src
// | |_ srcFile.ext
// |_ dst
//
// We'd assume that this throws, but instead, this happens:
// |_ src
// | |_ srcFile.ext
// |_ dst
// |_ srcFile.ext
//
// This can be fixed by preemptively verifying that there is no conflicting folder.
// This has the disadvantage that we lose the inner exception which would normally
// be thrown (the UnauthorizedAccessException below). To not lose it with other TFMs,
// only include the check in the failing .NET Core versions.
EnsureNoConflictingFolderExists(fullDstPath.ToString());
#endif
try
{
File.Copy(_fullPath.ToString(), fullDstPath.ToString(), overwrite);
return FileSystem.GetFile(destinationPath);
}
catch (UnauthorizedAccessException ex)
{
EnsureNoConflictingFolderExists(_fullPath.ToString(), ex);
EnsureNoConflictingFolderExists(fullDstPath.ToString(), ex);
throw;
}
}, cancellationToken));
}
public override Task SetAttributesAsync(IOFileAttributes attributes, CancellationToken cancellationToken = default)
{
// There's no "native" API for setting file/folder attributes.
// We can at least try to use System.IO's API - it should at least work in certain locations
// like the application data.
if (!EnumInfo.IsDefined(attributes))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(attributes), nameof(attributes));
}
return(Task.Run(async() =>
{
try
{
// Get the folder to ensure that it exists and to throw the appropriate exception.
await FsHelper.GetFolderAsync(_fullPath, cancellationToken).ConfigureAwait(false);
cancellationToken.ThrowIfCancellationRequested();
File.SetAttributes(_fullPath.ToString(), attributes);
}
catch (FileNotFoundException ex)
{
// Since we're using a File API, we must manually convert the FileNotFoundException.
throw new DirectoryNotFoundException(message: null, ex);
}
}, cancellationToken));
}
public override async Task CreateAsync(
bool recursive,
CreationCollisionOption options,
CancellationToken cancellationToken = default
)
{
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
await EnsureNoConflictingFolderExistsAsync(cancellationToken).ConfigureAwait(false);
WinStorageFolder parentFolder;
if (recursive)
{
parentFolder = await FsHelper
.GetOrCreateFolderAsync(_fullParentPath, cancellationToken)
.ConfigureAwait(false);
}
else
{
parentFolder = await FsHelper
.GetFolderAsync(_fullParentPath, cancellationToken)
.ConfigureAwait(false);
}
await parentFolder
.CreateFileAsync(_fullPath.Name, options.ToWinOptions())
.AsTask(cancellationToken)
.WithConvertedException()
.ConfigureAwait(false);
}
//
// The Open.../Read.../Write... methods below do not require explicit locking.
// Locking only happens when acquiring the FileContentStream from the node (via OpenFileContentStream(...)).
// Once the stream exists, the underlying FileNode automatically protects itself against
// modification since the file is "in use".
// See FileContentStream/FileNode for details.
//
public override async Task <Stream> OpenAsync(FileAccess fileAccess, CancellationToken cancellationToken = default)
{
if (!EnumInfo.IsDefined(fileAccess))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(fileAccess), nameof(fileAccess));
}
return(OpenFileContentStream(fileAccess, replaceExistingContent: false, cancellationToken));
}
/// <summary>
/// Converts the <paramref name="knownFolder"/> to a string and then calls the
/// <see cref="InMemoryFileSystem.GetPath(string)"/> method with it.
/// Then returns the full path of the result.
/// </summary>
/// <param name="fileSystem">
/// An <see cref="InMemoryFileSystem"/> instance for which the <see cref="KnownFolder"/>
/// should be located.
/// </param>
/// <param name="knownFolder">
/// The <see cref="KnownFolder"/> value to be located for the specified <paramref name="fileSystem"/>.
/// </param>
/// <returns>
/// A <see cref="StoragePath"/> which locates the specified <paramref name="knownFolder"/>
/// within the provided <paramref name="fileSystem"/>.
/// </returns>
/// <exception cref="ArgumentException">
/// <paramref name="knownFolder"/> is an invalid <see cref="KnownFolder"/> enumeration value.
/// </exception>
public StoragePath GetPath(InMemoryFileSystem fileSystem, KnownFolder knownFolder)
{
_ = fileSystem ?? throw new ArgumentNullException(nameof(fileSystem));
if (!EnumInfo.IsDefined(knownFolder))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(knownFolder), nameof(knownFolder));
}
return(fileSystem.GetPath(knownFolder.ToString()).FullPath);
}
public override Task DeleteAsync(DeletionOption options, CancellationToken cancellationToken = default)
{
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
return(options switch
{
DeletionOption.Fail => FailImpl(),
DeletionOption.IgnoreMissing => IgnoreMissingImpl(),
_ => throw new NotSupportedException(ExceptionStrings.Enum.UnsupportedValue(options)),
});
public override async Task CreateAsync(
bool recursive,
CreationCollisionOption options,
CancellationToken cancellationToken = default
)
{
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
CreateInternal(recursive, options, cancellationToken);
}
public override async Task SetAttributesAsync(FileAttributes attributes, CancellationToken cancellationToken = default)
{
if (!EnumInfo.IsDefined(attributes))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(attributes), nameof(attributes));
}
cancellationToken.ThrowIfCancellationRequested();
lock (_inMemoryFileSystem.Storage)
{
_storage.GetFolderNode(Path).Attributes = attributes;
}
}
public override Task SetAttributesAsync(FileAttributes attributes, CancellationToken cancellationToken = default)
{
if (!EnumInfo.IsDefined(attributes))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(attributes), nameof(attributes));
}
return(Task.Run(() =>
{
EnsureNoConflictingFolderExists(_fullPath.ToString());
cancellationToken.ThrowIfCancellationRequested();
File.SetAttributes(_fullPath.ToString(), attributes);
}, cancellationToken));
}
public override Task <StorageFolder> MoveAsync(
StoragePath destinationPath,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = destinationPath ?? throw new ArgumentNullException(nameof(destinationPath));
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
if (!(destinationPath is PhysicalStoragePath))
{
throw new ArgumentException(
ExceptionStrings.FsCompatibility.StoragePathTypeNotSupported(),
nameof(destinationPath)
);
}
return(Task.Run(() =>
{
// For whatever reason, Directory.Move moves files instead of throwing an exception.
// We've got to manually verify that the current location actually is a directory and not a file.
EnsureNoConflictingFileExists();
var fullDestinationPath = destinationPath.FullPath;
var destination = FileSystem.GetFolder(destinationPath);
var overwrite = options.ToOverwriteBool();
if (overwrite)
{
DeleteConflictingDestinationFolderWithoutDeletingThisFolder(fullDestinationPath.ToString());
// At this point the conflicting destination folder should be deleted.
// If that is not the case, we can assume that we are essentially moving
// the folder to the same location (because otherwise, the method above would
// have deleted the folder at the destination path).
if (Directory.Exists(fullDestinationPath.ToString()))
{
throw new IOException(ExceptionStrings.StorageFolder.CannotMoveToSameLocation());
}
}
cancellationToken.ThrowIfCancellationRequested();
Directory.Move(_fullPath.ToString(), fullDestinationPath.ToString());
return destination;
}, cancellationToken));
}
public override Task <StorageFile> MoveAsync(
StoragePath destinationPath,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = destinationPath ?? throw new ArgumentNullException(nameof(destinationPath));
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
if (!(destinationPath is PhysicalStoragePath))
{
throw new ArgumentException(
ExceptionStrings.FsCompatibility.StoragePathTypeNotSupported(),
nameof(destinationPath)
);
}
return(Task.Run(() =>
{
EnsureExists(cancellationToken);
var fullDestinationPath = destinationPath.FullPath;
var overwrite = options.ToOverwriteBool();
// System.IO doesn't throw when moving files to the same location.
// Detecting this via paths will not always work, but it fulfills the spec most of the time.
if (_fullPath == fullDestinationPath)
{
throw new IOException(ExceptionStrings.StorageFile.CannotMoveToSameLocation());
}
try
{
FilePolyfills.Move(_fullPath.ToString(), fullDestinationPath.ToString(), overwrite);
return FileSystem.GetFile(destinationPath);
}
catch (UnauthorizedAccessException ex)
{
EnsureNoConflictingFolderExists(_fullPath.ToString(), ex);
EnsureNoConflictingFolderExists(fullDestinationPath.ToString(), ex);
throw;
}
}, cancellationToken));
}
public override Task CreateAsync(
bool recursive,
CreationCollisionOption options,
CancellationToken cancellationToken = default
)
{
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
return(Task.Run(async() =>
{
// Directory.CreateDirectory is recursive by default.
// If recursive is false, we must manually ensure that the parent directory exists (if this is not
// a root directory).
if (!recursive && _fullParentPath is not null && !Directory.Exists(_fullParentPath.ToString()))
{
throw new DirectoryNotFoundException();
}
// Directory.CreateDirectory is very user friendly in the sense that it rarely throws exceptions.
// This means that we have to manually implement support for collision options.
// This can lead to race conditions, but it's the best we can do.
if (await ExistsAsync(cancellationToken).ConfigureAwait(false))
{
switch (options)
{
case CreationCollisionOption.Fail:
throw new IOException(ExceptionStrings.StorageFolder.CreateFailFolderAlreadyExists());
case CreationCollisionOption.ReplaceExisting:
await DeleteAsync(DeletionOption.IgnoreMissing, cancellationToken).ConfigureAwait(false);
break;
case CreationCollisionOption.UseExisting:
return;
default:
throw new NotSupportedException(ExceptionStrings.Enum.UnsupportedValue(options));
}
}
cancellationToken.ThrowIfCancellationRequested();
Directory.CreateDirectory(_fullPath.ToString());
}, cancellationToken));
}
public override async Task <Stream> CreateAndOpenAsync(
bool recursive,
CreationCollisionOption options,
CancellationToken cancellationToken = default
)
{
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
lock (_inMemoryFileSystem.Storage)
{
CreateInternal(recursive, options, cancellationToken);
return(OpenFileContentStream(FileAccess.ReadWrite, replaceExistingContent: false, cancellationToken));
}
}
public override async Task CreateAsync(
bool recursive,
CreationCollisionOption options,
CancellationToken cancellationToken = default
)
{
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
// We cannot reasonably create a root directory with the Windows Storage API.
// If someone tries to do so, we'll simply deny the call. In most cases, the root
// folder will exist anyway.
if (_fullParentPath is null)
{
throw new UnauthorizedAccessException();
}
await EnsureNoConflictingFileExistsAsync(cancellationToken).ConfigureAwait(false);
WinStorageFolder parentFolder;
if (recursive)
{
parentFolder = await FsHelper
.GetOrCreateFolderAsync(_fullParentPath, cancellationToken)
.ConfigureAwait(false);
}
else
{
parentFolder = await FsHelper
.GetFolderAsync(_fullParentPath, cancellationToken)
.ConfigureAwait(false);
}
await parentFolder
.CreateFolderAsync(_fullPath.Name, options.ToWinOptions())
.AsTask(cancellationToken)
.WithConvertedException()
.ConfigureAwait(false);
}
public override async Task <StorageFile> MoveAsync(
StoragePath destinationPath,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = destinationPath ?? throw new ArgumentNullException(nameof(destinationPath));
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
if (!(destinationPath is PhysicalStoragePath))
{
throw new ArgumentException(
ExceptionStrings.FsCompatibility.StoragePathTypeNotSupported(),
nameof(destinationPath)
);
}
if (destinationPath.FullPath.Parent is null)
{
throw new IOException(ExceptionStrings.StorageFile.CannotMoveToRootLocation());
}
var fullDestinationPath = destinationPath.FullPath;
var destinationFile = FileSystem.GetFile(fullDestinationPath);
var file = await FsHelper.GetFileAsync(_fullPath, cancellationToken).ConfigureAwait(false);
var destFolder = await FsHelper
.GetFolderAsync(fullDestinationPath.Parent, cancellationToken)
.ConfigureAwait(false);
await file
.MoveAsync(destFolder, fullDestinationPath.Name, options.ToWinOptions())
.AsTask(cancellationToken)
.WithConvertedException()
.ConfigureAwait(false);
return(destinationFile);
}
public override async Task <StorageFolder> MoveAsync(
StoragePath destinationPath,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = destinationPath ?? throw new ArgumentNullException(nameof(destinationPath));
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
if (!(destinationPath is PhysicalStoragePath))
{
throw new ArgumentException(
ExceptionStrings.FsCompatibility.StoragePathTypeNotSupported(),
nameof(destinationPath)
);
}
var fullDestinationPath = destinationPath.FullPath;
var destinationFolder = FileSystem.GetFolder(fullDestinationPath);
// There is no native Move API. The current "best practice" (haha) is to simply copy
// a folder instead of moving.
// We might be able to improve performance if we're moving into the same directory, i.e.
// if we're effectively doing a rename.
// Since this is path based, we have to be careful, of course.
if (fullDestinationPath.Parent == _fullParentPath)
{
await RenameAsync(destinationPath.FullPath.Name, options, cancellationToken).ConfigureAwait(false);
}
else
{
await CopyAsync(destinationPath, options, cancellationToken).ConfigureAwait(false);
}
await DeleteAsync(DeletionOption.IgnoreMissing, cancellationToken).ConfigureAwait(false);
return(destinationFolder);
}
public override Task SetAttributesAsync(FileAttributes attributes, CancellationToken cancellationToken = default)
{
if (!EnumInfo.IsDefined(attributes))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(attributes), nameof(attributes));
}
return(Task.Run(() =>
{
try
{
EnsureNoConflictingFileExists();
cancellationToken.ThrowIfCancellationRequested();
File.SetAttributes(_fullPath.ToString(), attributes);
}
catch (FileNotFoundException ex)
{
// Since we're using a File API, we must manually convert the FileNotFoundException.
throw new DirectoryNotFoundException(message: null, ex);
}
}, cancellationToken));
}
public override async Task <StorageFile> RenameAsync(
string newName,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = newName ?? throw new ArgumentNullException(nameof(newName));
if (newName.Length == 0)
{
throw new ArgumentException(ExceptionStrings.String.CannotBeEmpty(), nameof(newName));
}
if (newName.Contains(PhysicalPathHelper.InvalidNewNameCharacters))
{
throw new ArgumentException(
ExceptionStrings.StorageFile.NewNameContainsInvalidChar(FileSystem.PathInformation),
nameof(newName)
);
}
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
var destinationPath = _fullParentPath.Join(newName).FullPath;
var destinationFile = FileSystem.GetFile(destinationPath);
var file = await FsHelper.GetFileAsync(_fullPath, cancellationToken).ConfigureAwait(false);
await file
.RenameAsync(newName, options.ToWinOptions())
.AsTask(cancellationToken)
.WithConvertedException()
.ConfigureAwait(false);
return(destinationFile);
}
/// <inheritdoc/>
public override StoragePath GetPath(KnownFolder knownFolder)
{
if (!EnumInfo.IsDefined(knownFolder))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(knownFolder), nameof(knownFolder));
}
var path = knownFolder switch
{
KnownFolder.TemporaryData => Path.GetTempPath(),
KnownFolder.RoamingApplicationData => GetSpecialFolder(ApplicationData),
KnownFolder.LocalApplicationData => GetSpecialFolder(LocalApplicationData),
KnownFolder.ProgramData => GetSpecialFolder(CommonApplicationData),
KnownFolder.UserProfile => GetSpecialFolder(UserProfile),
KnownFolder.Desktop => GetSpecialFolder(Desktop),
KnownFolder.DocumentsLibrary => GetSpecialFolder(MyDocuments),
KnownFolder.PicturesLibrary => GetSpecialFolder(MyPictures),
KnownFolder.VideosLibrary => GetSpecialFolder(MyVideos),
KnownFolder.MusicLibrary => GetSpecialFolder(MyMusic),
_ => throw new NotSupportedException(ExceptionStrings.FileSystem.KnownFolderNotSupported(knownFolder)),
};
return(GetPath(path));
public override async Task <StorageFolder> MoveAsync(
StoragePath destinationPath,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = destinationPath ?? throw new ArgumentNullException(nameof(destinationPath));
if (!ReferenceEquals(destinationPath.FileSystem, FileSystem))
{
throw new ArgumentException(
ExceptionStrings.InMemoryFileSystem.MemberIncompatibleWithInstance(),
nameof(destinationPath)
);
}
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
return(MoveInternal(destinationPath, options, cancellationToken));
}
public override async Task <StorageFolder> CopyAsync(
StoragePath destinationPath,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = destinationPath ?? throw new ArgumentNullException(nameof(destinationPath));
if (!ReferenceEquals(destinationPath.FileSystem, FileSystem))
{
throw new ArgumentException(
ExceptionStrings.InMemoryFileSystem.MemberIncompatibleWithInstance(),
nameof(destinationPath)
);
}
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
cancellationToken.ThrowIfCancellationRequested();
var replaceExisting = options switch
{
NameCollisionOption.Fail => false,
NameCollisionOption.ReplaceExisting => true,
_ => throw new NotSupportedException(ExceptionStrings.Enum.UnsupportedValue(options)),
};
lock (_inMemoryFileSystem.Storage)
{
var folderNode = _storage.GetFolderNode(Path);
folderNode.Copy(destinationPath, replaceExisting);
return(FileSystem.GetFolder(destinationPath.FullPath));
}
}
public override async Task <StorageFolder> RenameAsync(
string newName,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = newName ?? throw new ArgumentNullException(nameof(newName));
if (newName.Length == 0)
{
throw new ArgumentException(ExceptionStrings.String.CannotBeEmpty(), nameof(newName));
}
if (newName.Contains(PhysicalPathHelper.InvalidNewNameCharacters))
{
throw new ArgumentException(
ExceptionStrings.StorageFolder.NewNameContainsInvalidChar(FileSystem.PathInformation),
nameof(newName)
);
}
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
var srcFolder = await FsHelper.GetFolderAsync(_fullPath, cancellationToken).ConfigureAwait(false);
var fullDestinationPath = _fullParentPath is null
? FileSystem.GetPath(newName).FullPath
: _fullParentPath.Join(newName).FullPath;
// The Windows Storage API doesn't do a hard replace with the ReplaceExisting option.
// For example, if we had this structure:
// |_ src
// | |_ foo.ext
// |_ dst
// |_ bar.ext
//
// and renamed `src` to `dst`, we'd get this result:
// |_ dst
// |_ foo.ext
// |_ bar.ext
//
// What we (and the spec) want is this:
// |_ dst
// |_ foo.ext
//
// We can manually delete the dst folder if it exists to fulfill the specification.
// We're *only* doing it if we can be sure that we're not doing an in-place rename though,
// i.e. rename `src` to `src`.
// Otherwise we'd run into the problem that `src` is deleted and that the rename operation
// will fail (DirectoryNotFound). Afterwards the entire folder is gone permanently.
// That must be avoided at all cost.
if (options == NameCollisionOption.ReplaceExisting &&
!fullDestinationPath.Name.Equals(_fullPath.Name, FileSystem.PathInformation.DefaultStringComparison))
{
try
{
var dstFolder = await FsHelper.GetFolderAsync(fullDestinationPath, cancellationToken).ConfigureAwait(false);
await dstFolder.DeleteAsync(StorageDeleteOption.PermanentDelete).AsAwaitable(cancellationToken);
}
catch
{
// If deleting the conflicting folder fails, it's okay, since the whole process
// is just there for fulfilling the specification.
// The Windows Storage API will still replace conflicting elements.
// It's just that certain files may be left over (as described above).
// Not fulfilling the spec is the best thing we can do without taking higher risks
// of lost data.
}
}
await srcFolder
.RenameAsync(newName, options.ToWinOptions())
.AsTask(cancellationToken)
.WithConvertedException()
.ConfigureAwait(false);
return(FileSystem.GetFolder(fullDestinationPath));
}
public override async Task <StorageFolder> CopyAsync(
StoragePath destinationPath,
NameCollisionOption options,
CancellationToken cancellationToken = default
)
{
_ = destinationPath ?? throw new ArgumentNullException(nameof(destinationPath));
if (!EnumInfo.IsDefined(options))
{
throw new ArgumentException(ExceptionStrings.Enum.UndefinedValue(options), nameof(options));
}
if (!(destinationPath is PhysicalStoragePath))
{
throw new ArgumentException(
ExceptionStrings.FsCompatibility.StoragePathTypeNotSupported(),
nameof(destinationPath)
);
}
if (destinationPath.FullPath.Parent is null)
{
throw new IOException(ExceptionStrings.StorageFolder.CannotMoveToRootLocation());
}
if (destinationPath.FullPath == _fullPath)
{
throw new IOException(ExceptionStrings.StorageFolder.CannotCopyToSameLocation());
}
var destinationParentFolder = await FsHelper
.GetFolderAsync(destinationPath.FullPath.Parent, cancellationToken)
.ConfigureAwait(false);
var sourceFolder = await FsHelper.GetFolderAsync(_fullPath, cancellationToken).ConfigureAwait(false);
await Impl(sourceFolder, destinationParentFolder, destinationPath.FullPath.Name).ConfigureAwait(false);
return(FileSystem.GetFolder(destinationPath.FullPath));
async Task Impl(WinStorageFolder src, WinStorageFolder dstFolderParent, string dstFolderName)
{
var dstFolder = await dstFolderParent
.CreateFolderAsync(dstFolderName, ((CreationCollisionOption)options).ToWinOptions())
.AsTask(cancellationToken)
.WithConvertedException()
.ConfigureAwait(false);
foreach (var file in await src.GetFilesAsync().AsAwaitable(cancellationToken))
{
await file
.CopyAsync(dstFolder, file.Name)
.AsTask(cancellationToken)
.WithConvertedException()
.ConfigureAwait(false);
}
foreach (var folder in await src.GetFoldersAsync().AsAwaitable(cancellationToken))
{
await Impl(folder, dstFolder, folder.Name).ConfigureAwait(false);
}
}
}