public async Task <IFile> MoveAsync(string newPath, CollisionOption collisionOption = CollisionOption.ReplaceExisting,
CancellationToken cancellationToken = new CancellationToken())
{
var newFolder = await StorageFolder.GetFolderFromPathAsync(System.IO.Path.GetDirectoryName(newPath))
.AsTask(cancellationToken)
.ConfigureAwait(false);
string newName = System.IO.Path.GetFileName(newPath);
try
{
await _storageFile.MoveAsync(newFolder, newName, collisionOption.ToNameCollisionOption())
.AsTask(cancellationToken)
.ConfigureAwait(false);
}
catch (Exception ex)
{
if (ex.HResult == FileAlreadyExists)
{
throw new UnifiedIOException(string.Format("The file {0} already exists", newPath), ex);
}
throw new UnifiedIOException(
string.Format("Could not move the file {0} to {1}: {2}", _path, newPath, ex.Message), ex);
}
_path = _storageFile.Path;
return(this);
}
/// <summary>
/// Moves the file to the specified directory path
/// </summary>
/// <param name="destinationDirectoryPath"></param>
/// <param name="option"></param>
/// <returns></returns>
public Task <bool> MoveAsync(string destinationDirectoryPath, CollisionOption option)
{
AssertFileExists();
return(Task.Factory.StartNew(() =>
{
bool wasMoved = false;
string fullDestinationPath = Environment.ExpandEnvironmentVariables(Path.Combine(destinationDirectoryPath, this.Filename));
switch (option)
{
case CollisionOption.ReplaceExisting:
if (File.Exists(fullDestinationPath))
{
File.Delete(fullDestinationPath);
}
_fileInfo.MoveTo(fullDestinationPath);
wasMoved = true;
break;
case CollisionOption.ThrowExisting:
if (File.Exists(fullDestinationPath))
{
throw new Exceptions.FileAlreadyExistsException("File already exists in the target directory");
}
goto case CollisionOption.ReplaceExisting;
default:
goto case CollisionOption.ReplaceExisting;
}
return wasMoved;
}));
}
public async Task <IFile> CreateFileAsync(string desiredName, CollisionOption option,
CancellationToken cancellationToken = new CancellationToken())
{
await EnsureExistsAsync(cancellationToken)
.ConfigureAwait(false);
StorageFile file;
try
{
file = await _storage.CreateFileAsync(desiredName, option.ToCreationCollisionOption())
.AsTask(cancellationToken)
.ConfigureAwait(false);
}
catch (Exception ex)
{
if (ex.HResult == WindowsStorageFile.FileAlreadyExists)
{
// File already exists (and potentially other failures, not sure what the HResult represents)
throw new UnifiedIOException(ex.Message, ex);
}
throw;
}
return(new WindowsStorageFile(file));
}
/// <summary>
/// Moves the directory to the destination directory specified
/// </summary>
/// <param name="destinationDirectoryPath"></param>
/// <param name="collisionOption"></param>
/// <returns></returns>
public Task <bool> MoveAsync(string destinationDirectoryPath, CollisionOption collisionOption)
{
AssertDirectoryExists();
return(Task.Factory.StartNew(() =>
{
bool wasMoved = false;
switch (collisionOption)
{
case CollisionOption.ReplaceExisting:
string fullDestination = Path.Combine(_systemPathMapper.GetUserContextFolder(destinationDirectoryPath), this.Name);
if (Directory.Exists(fullDestination))
{
Directory.Delete(fullDestination);
}
Directory.Move(this.FullPath, fullDestination);
_directoryInfo = new DirectoryInfo(fullDestination);
wasMoved = true;
break;
case CollisionOption.ThrowExisting:
throw new Exceptions.DirectoryAlreadyExistsException("Directory already exists in the target directory");
default:
goto case CollisionOption.ReplaceExisting;
}
return wasMoved;
}));
}
public async Task<IFile> CreateFileAsync(string desiredName, CollisionOption option,
CancellationToken cancellationToken = new CancellationToken())
{
await EnsureExistsAsync(cancellationToken)
.ConfigureAwait(false);
StorageFile file;
try
{
file = await _storage.CreateFileAsync(desiredName, option.ToCreationCollisionOption())
.AsTask(cancellationToken)
.ConfigureAwait(false);
}
catch (Exception ex)
{
if (ex.HResult == WindowsStorageFile.FileAlreadyExists)
{
// File already exists (and potentially other failures, not sure what the HResult represents)
throw new UnifiedIOException(ex.Message, ex);
}
throw;
}
return new WindowsStorageFile(file);
}
public async Task <IDirectory> CreateDirectoryAsync(string desiredName, CollisionOption option,
CancellationToken cancellationToken = default(CancellationToken))
{
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
EnsureExists();
string nameToUse = desiredName;
string newPath = System.IO.Path.Combine(Path, nameToUse);
if (Directory.Exists(newPath))
{
switch (option)
{
case CollisionOption.GenerateUniqueName:
{
for (int num = 2; Directory.Exists(newPath); num++)
{
cancellationToken.ThrowIfCancellationRequested();
nameToUse = string.Format("{0} ({1})", desiredName, num);
newPath = System.IO.Path.Combine(Path, nameToUse);
}
Directory.CreateDirectory(newPath);
break;
}
case CollisionOption.ReplaceExisting:
{
Directory.Delete(newPath, true);
Directory.CreateDirectory(newPath);
break;
}
case CollisionOption.FailIfExists:
throw new UnifiedIOException(string.Format("The directory {0} already exists",
newPath));
case CollisionOption.OpenIfExists:
{
// Do nothing...
break;
}
default:
throw new ArgumentOutOfRangeException("option", option, null);
}
}
else
{
Directory.CreateDirectory(newPath);
}
return(new DotNetDirectory(newPath));
}
public async Task <IFile> CreateFileAsync(string desiredName, CollisionOption option,
CancellationToken cancellationToken = default(CancellationToken))
{
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
string nameToUse = desiredName;
string newPath = System.IO.Path.Combine(Path, nameToUse);
if (File.Exists(newPath))
{
switch (option)
{
case CollisionOption.GenerateUniqueName:
{
string desiredRoot = System.IO.Path.GetFileNameWithoutExtension(desiredName);
string desiredExtension = System.IO.Path.GetExtension(desiredName);
for (int num = 1; File.Exists(newPath); num++)
{
cancellationToken.ThrowIfCancellationRequested();
nameToUse = string.Format("{0} ({1}).{2}", desiredRoot, num, desiredExtension);
newPath = System.IO.Path.Combine(Path, nameToUse);
}
break;
}
case CollisionOption.ReplaceExisting:
{
File.Delete(newPath);
CreateFile(newPath);
break;
}
case CollisionOption.FailIfExists:
throw new UnifiedIOException("Cannot create file, it already exists");
case CollisionOption.OpenIfExists:
{
// Do nothing
break;
}
default:
throw new ArgumentOutOfRangeException("option", option, null);
}
}
else
{
// Create file
CreateFile(newPath);
}
return(new DotNetFile(newPath));
}
public async Task RenameAsync(string newFileName, CollisionOption collisionOption = CollisionOption.FailIfExists, CancellationToken cancellationToken = default(CancellationToken))
{
await Task.Run(() =>
{
var currentFileName = System.IO.Path.GetFileName(Path);
var newFilePath = Path.Replace(currentFileName, newFileName);
System.IO.File.Move(Path, newFilePath);
Path = newFilePath;
}, cancellationToken);
}
public async Task <IFile> RenameAsync(string newName, CollisionOption collisionOption = CollisionOption.FailIfExists,
CancellationToken cancellationToken = default(CancellationToken))
{
var directory = System.IO.Path.GetDirectoryName(_path);
if (newName.StartsWith(directory))
{
throw new ArgumentException("The filename must not contain a path", "newName");
}
return(await MoveAsync(System.IO.Path.Combine(directory, newName), collisionOption, cancellationToken));
}
public async Task<IFile> CreateFileAsync(string desiredName, CollisionOption option,
CancellationToken cancellationToken = default(CancellationToken))
{
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
string nameToUse = desiredName;
string newPath = System.IO.Path.Combine(Path, nameToUse);
if (File.Exists(newPath))
{
switch (option)
{
case CollisionOption.GenerateUniqueName:
{
string desiredRoot = System.IO.Path.GetFileNameWithoutExtension(desiredName);
string desiredExtension = System.IO.Path.GetExtension(desiredName);
for (int num = 1; File.Exists(newPath); num++)
{
cancellationToken.ThrowIfCancellationRequested();
nameToUse = string.Format("{0} ({1}).{2}", desiredRoot, num, desiredExtension);
newPath = System.IO.Path.Combine(Path, nameToUse);
}
break;
}
case CollisionOption.ReplaceExisting:
{
File.Delete(newPath);
CreateFile(newPath);
break;
}
case CollisionOption.FailIfExists:
throw new UnifiedIOException("Cannot create file, it already exists");
case CollisionOption.OpenIfExists:
{
// Do nothing
break;
}
default:
throw new ArgumentOutOfRangeException("option", option, null);
}
}
else
{
// Create file
CreateFile(newPath);
}
return new DotNetFile(newPath);
}
public Task<IFile> RenameAsync(string newName, CollisionOption collisionOption = CollisionOption.FailIfExists,
CancellationToken cancellationToken = default(CancellationToken))
{
// Make sure the source file exists
EnsureExists();
var directoryPath = System.IO.Path.GetDirectoryName(_path);
if (directoryPath == null)
{
throw new ArgumentException("newName");
}
return MoveAsync( System.IO.Path.Combine(directoryPath, newName), collisionOption, cancellationToken );
}
public Task <IFile> RenameAsync(string newName, CollisionOption collisionOption = CollisionOption.FailIfExists,
CancellationToken cancellationToken = default(CancellationToken))
{
// Make sure the source file exists
EnsureExists();
var directoryPath = System.IO.Path.GetDirectoryName(_path);
if (directoryPath == null)
{
throw new ArgumentException("newName");
}
return(MoveAsync(System.IO.Path.Combine(directoryPath, newName), collisionOption, cancellationToken));
}
/// <summary>
/// Copies the contents of this directory to the target destination
/// CAUTION: If you want to directly copy this directory you must specify this directory name in the destination path
/// Example: CopyAsync(C:\ProgramData, CollisionOption) will just copy the files and subdirectories
/// in the directory to ProgramData. CopyAsync(C:\ProgramData\[NameOfDirectory], CollisionOption) will be like copying
/// the folder itself
/// </summary>
/// <returns></returns>
public Task <bool> CopyAsync(string destinationPath, CollisionOption collisionOption)
{
AssertDirectoryExists();
return(Task.Factory.StartNew(() =>
{
bool wasCopied = false;
// Expand the destination directory and add this directory name to the target directory
string expandedDestination = _systemPathMapper.GetUserContextFolder(destinationPath);
// Call the copy directory function, requires new method due to recursion
wasCopied = CopyDirectory(_directoryInfo.FullName, expandedDestination, collisionOption);
return wasCopied;
}));
}
public static NameCollisionOption ToNameCollisionOption(this CollisionOption option)
{
switch (option)
{
case CollisionOption.GenerateUniqueName:
return(NameCollisionOption.GenerateUniqueName);
case CollisionOption.ReplaceExisting:
return(NameCollisionOption.ReplaceExisting);
case CollisionOption.FailIfExists:
return(NameCollisionOption.FailIfExists);
default:
throw new ArgumentOutOfRangeException("option", option, null);
}
}
public async Task <ICrossFolder> CreateFolderAsync(string folderName, CollisionOption collisionOption = CollisionOption.FailIfExists, CancellationToken cancellationToken = default(CancellationToken))
{
return(await Task.Run(() =>
{
var newFolderPath = System.IO.Path.Combine(Path, folderName);
var exists = Directory.Exists(newFolderPath);
if (exists && collisionOption == CollisionOption.FailIfExists)
{
return null;
}
if (exists && collisionOption == CollisionOption.ReplaceExisting)
{
Directory.Delete(newFolderPath, false);
}
Directory.CreateDirectory(newFolderPath);
return new CrossFolder(folderName, newFolderPath);
}, cancellationToken));
}
/// <summary>
/// Moves the directory to the destination directory specified
/// </summary>
/// <param name="destinationDirectoryPath"></param>
/// <param name="collisionOption"></param>
/// <returns></returns>
public Task <bool> MoveAsync(string destinationDirectoryPath, CollisionOption collisionOption)
{
AssertDirectoryExists();
return(Task.Factory.StartNew(() =>
{
bool wasMoved = false;
string fullDestination = Environment.ExpandEnvironmentVariables(Path.Combine(destinationDirectoryPath, this.Name));
if (Directory.Exists(fullDestination))
{
switch (collisionOption)
{
case CollisionOption.ReplaceExisting:
Directory.Delete(fullDestination, true);
Directory.Move(this.FullPath, fullDestination);
_directoryInfo = new DirectoryInfo(fullDestination);
wasMoved = true;
break;
case CollisionOption.ThrowExisting:
throw new Exceptions.DirectoryAlreadyExistsException("Directory already exists in the target directory");
default:
goto case CollisionOption.ReplaceExisting;
}
}
else
{
Directory.Move(this.FullPath, fullDestination);
_directoryInfo = new DirectoryInfo(fullDestination);
wasMoved = true;
}
return wasMoved;
}));
}
public async Task <IFile> CopyAsync(string newPath, CollisionOption collisionOption = CollisionOption.ReplaceExisting,
CancellationToken cancellationToken = new CancellationToken())
{
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
await EnsureExistsAsync(cancellationToken);
StorageFile newFile;
using (Stream source = await _storageFile.OpenStreamForReadAsync())
{
newFile = await StorageFile.GetFileFromPathAsync(newPath)
.AsTask(cancellationToken)
.ConfigureAwait(false);
const int bufferSize = 4096;
using (Stream destination = await newFile.OpenStreamForWriteAsync())
{
await source.CopyToAsync(destination, bufferSize, cancellationToken);
}
}
return(new WindowsStorageFile(newFile));
}
public async Task <IFile> CopyAsync(string newPath, CollisionOption collisionOption = CollisionOption.ReplaceExisting,
CancellationToken cancellationToken = default(CancellationToken))
{
// Make sure the source file exists
EnsureExists();
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
using (Stream source = File.Open(_path, FileMode.Open))
{
const int bufferSize = 4096;
#if __UNIFIED__ || _ANDROID_
using (Stream destination = File.Create(newPath, bufferSize))
#else
using (Stream destination = File.Create(newPath, bufferSize, FileOptions.Asynchronous))
#endif
{
await source.CopyToAsync(destination, bufferSize, cancellationToken);
}
}
return(new DotNetFile(newPath));
}
public async Task MoveAsync(string newFilePath, CollisionOption collisionOption = CollisionOption.ReplaceExisting, CancellationToken cancellationToken = default(CancellationToken))
{
await Task.Run(() => { System.IO.File.Move(Path, newFilePath); }, cancellationToken);
}
public async Task <IFile> MoveAsync(string newPath, CollisionOption collisionOption = CollisionOption.ReplaceExisting,
CancellationToken cancellationToken = default(CancellationToken))
{
// Make sure the source file exists
EnsureExists();
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
string newDirectory = System.IO.Path.GetDirectoryName(newPath);
string newName = System.IO.Path.GetFileName(newPath);
for (int counter = 1;; counter++)
{
cancellationToken.ThrowIfCancellationRequested();
string candidateName = newName;
if (counter > 1)
{
candidateName = string.Format(
CultureInfo.InvariantCulture,
"{0} ({1}){2}",
System.IO.Path.GetFileNameWithoutExtension(newName),
counter,
System.IO.Path.GetExtension(newName));
}
string candidatePath = System.IO.Path.Combine(newDirectory, candidateName);
if (File.Exists(candidatePath))
{
switch (collisionOption)
{
case CollisionOption.FailIfExists:
{
throw new UnifiedIOException("File already exists.");
}
case CollisionOption.GenerateUniqueName:
{
// Continue with the loop and generate a new name
continue;
}
case CollisionOption.ReplaceExisting:
{
File.Delete(candidatePath);
break;
}
default:
{
throw new ArgumentOutOfRangeException("collisionOption", collisionOption, null);
}
}
}
File.Move(_path, candidatePath);
_path = candidatePath;
return(this);
}
}
public async Task<IDirectory> CreateDirectoryAsync(string desiredName, CollisionOption option,
CancellationToken cancellationToken = default(CancellationToken))
{
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
EnsureExists();
string nameToUse = desiredName;
string newPath = System.IO.Path.Combine(Path, nameToUse);
if (Directory.Exists(newPath))
{
switch (option)
{
case CollisionOption.GenerateUniqueName:
{
for (int num = 2; Directory.Exists(newPath); num++)
{
cancellationToken.ThrowIfCancellationRequested();
nameToUse = string.Format("{0} ({1})", desiredName, num);
newPath = System.IO.Path.Combine(Path, nameToUse);
}
Directory.CreateDirectory(newPath);
break;
}
case CollisionOption.ReplaceExisting:
{
Directory.Delete(newPath, true);
Directory.CreateDirectory(newPath);
break;
}
case CollisionOption.FailIfExists:
throw new UnifiedIOException(string.Format("The directory {0} already exists",
newPath));
case CollisionOption.OpenIfExists:
{
// Do nothing...
break;
}
default:
throw new ArgumentOutOfRangeException("option", option, null);
}
}
else
{
Directory.CreateDirectory(newPath);
}
return new DotNetDirectory(newPath);
}
public async Task<IFile> RenameAsync(string newName, CollisionOption collisionOption = CollisionOption.FailIfExists,
CancellationToken cancellationToken = default(CancellationToken))
{
var directory = System.IO.Path.GetDirectoryName(_path);
if (newName.StartsWith(directory))
{
throw new ArgumentException("The filename must not contain a path", "newName");
}
return await MoveAsync(System.IO.Path.Combine(directory, newName), collisionOption, cancellationToken);
}
public async Task <ICrossFile> WriteTextFileAsync(string fileName, string content, CollisionOption collisionOption = CollisionOption.ReplaceExisting, CancellationToken cancellationToken = default(CancellationToken))
{
return(await Task.Run(() =>
{
var fileExtension = "txt";
var newFilePath = System.IO.Path.Combine(Path, $"{fileName}.{fileExtension}");
var exists = System.IO.File.Exists(newFilePath);
if (exists && collisionOption == CollisionOption.FailIfExists)
{
return null;
}
if (exists && collisionOption == CollisionOption.ReplaceExisting)
{
System.IO.File.Delete(newFilePath);
}
System.IO.File.WriteAllText(newFilePath, content, Encoding.UTF8);
return new CrossFile(fileName, fileExtension, newFilePath);
}, cancellationToken));
}
public async Task <ICrossFile> CreateFileAsync(string fileName, string fileExtension, byte[] dataBytes, CollisionOption collisionOption = CollisionOption.FailIfExists, CancellationToken cancellationToken = default(CancellationToken))
{
return(await Task.Run(() =>
{
var newFilePath = System.IO.Path.Combine(Path, $"{fileName}.{fileExtension}");
var exists = System.IO.File.Exists(newFilePath);
if (exists && collisionOption == CollisionOption.FailIfExists)
{
return null;
}
if (exists && collisionOption == CollisionOption.ReplaceExisting)
{
System.IO.File.Delete(newFilePath);
}
System.IO.File.WriteAllBytes(newFilePath, dataBytes);
return new CrossFile(fileName, fileExtension, newFilePath);
}, cancellationToken));
}
/// <summary>
/// Recursive function to copy directories
/// </summary>
private bool CopyDirectory(string source, string destination, CollisionOption collisionOption)
{
bool wasCopied = false;
// Get the source directory
DirectoryInfo sourceDir = new DirectoryInfo(source);
// Create the directory if it does not already exist
if (!Directory.Exists(destination))
{
Directory.CreateDirectory(destination);
}
// Get the files & sub directories for the source directory
var files = sourceDir.GetFiles();
var subDirectories = sourceDir.GetDirectories();
switch (collisionOption)
{
// Replaces any existing folders or files
case CollisionOption.ReplaceExisting:
// Iterate through each file in the directory
foreach (var file in files)
{
// Get the file info for the destination path, to see if it already exists
FileInfo fileDestInfo = new FileInfo(Path.Combine(destination, file.Name));
if (fileDestInfo.Exists)
{
// Delete the existing target file
fileDestInfo.Delete();
}
// Copy the file to the new destination
file.CopyTo(Path.Combine(destination, file.Name), true);
}
// Iterate through each folder in the directory
foreach (var subDirectory in subDirectories)
{
// Get the directory info for the destination path, to see if it already exists
DirectoryInfo dirDestInfo = new DirectoryInfo(Path.Combine(destination, subDirectory.Name));
if (dirDestInfo.Exists)
{
// Delete the existing target directory
dirDestInfo.Delete(true);
}
// Copy the directory to the new destination
CopyDirectory(subDirectory.FullName, dirDestInfo.FullName, collisionOption);
}
wasCopied = true;
break;
// Throws exception if there are any pre-existing files or folders
case CollisionOption.ThrowExisting:
// Iterate through file in the directory
foreach (var file in files)
{
// Get the file info for the destination path, to see if it already exists
FileInfo fileDestInfo = new FileInfo(Path.Combine(destination, file.Name));
if (!fileDestInfo.Exists)
{
// Copy the file to the new destination
file.CopyTo(fileDestInfo.FullName, true);
}
else
{
throw new Exceptions.FileAlreadyExistsException(String.Format("File path {0} already exists.", file.FullName));
}
}
// Iterate through each sub-directory
foreach (var subDirectory in subDirectories)
{
// Get the directory info for the destination path, to see if it already exists
DirectoryInfo dirDestInfo = new DirectoryInfo(Path.Combine(destination, subDirectory.Name));
if (!dirDestInfo.Exists)
{
// Copy the directory to the new destination
CopyDirectory(subDirectory.FullName, dirDestInfo.FullName, collisionOption);
}
else
{
throw new Exceptions.FileAlreadyExistsException(String.Format("Directory path {0} already exists.", subDirectory.FullName));
}
}
wasCopied = true;
break;
default:
goto case CollisionOption.ReplaceExisting;
}
return(wasCopied);
}
public async Task<IFile> MoveAsync(string newPath, CollisionOption collisionOption = CollisionOption.ReplaceExisting,
CancellationToken cancellationToken = new CancellationToken())
{
var newFolder = await StorageFolder.GetFolderFromPathAsync(System.IO.Path.GetDirectoryName(newPath))
.AsTask(cancellationToken)
.ConfigureAwait(false);
string newName = System.IO.Path.GetFileName(newPath);
try
{
await _storageFile.MoveAsync(newFolder, newName, collisionOption.ToNameCollisionOption())
.AsTask(cancellationToken)
.ConfigureAwait(false);
}
catch (Exception ex)
{
if (ex.HResult == FileAlreadyExists)
{
throw new UnifiedIOException(string.Format("The file {0} already exists", newPath), ex);
}
throw new UnifiedIOException(
string.Format("Could not move the file {0} to {1}: {2}", _path, newPath, ex.Message), ex);
}
_path = _storageFile.Path;
return this;
}
public async Task<IFile> CopyAsync(string newPath, CollisionOption collisionOption = CollisionOption.ReplaceExisting,
CancellationToken cancellationToken = new CancellationToken())
{
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
await EnsureExistsAsync(cancellationToken);
StorageFile newFile;
using (Stream source = await _storageFile.OpenStreamForReadAsync())
{
newFile = await StorageFile.GetFileFromPathAsync(newPath)
.AsTask(cancellationToken)
.ConfigureAwait(false);
const int bufferSize = 4096;
using (Stream destination = await newFile.OpenStreamForWriteAsync())
{
await source.CopyToAsync(destination, bufferSize, cancellationToken);
}
}
return new WindowsStorageFile(newFile);
}
public async Task<IFile> MoveAsync(string newPath, CollisionOption collisionOption = CollisionOption.ReplaceExisting,
CancellationToken cancellationToken = default(CancellationToken))
{
// Make sure the source file exists
EnsureExists();
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
string newDirectory = System.IO.Path.GetDirectoryName(newPath);
string newName = System.IO.Path.GetFileName(newPath);
for (int counter = 1;; counter++)
{
cancellationToken.ThrowIfCancellationRequested();
string candidateName = newName;
if (counter > 1)
{
candidateName = string.Format(
CultureInfo.InvariantCulture,
"{0} ({1}){2}",
System.IO.Path.GetFileNameWithoutExtension(newName),
counter,
System.IO.Path.GetExtension(newName));
}
string candidatePath = System.IO.Path.Combine(newDirectory, candidateName);
if (File.Exists(candidatePath))
{
switch (collisionOption)
{
case CollisionOption.FailIfExists:
{
throw new UnifiedIOException("File already exists.");
}
case CollisionOption.GenerateUniqueName:
{
// Continue with the loop and generate a new name
continue;
}
case CollisionOption.ReplaceExisting:
{
File.Delete(candidatePath);
break;
}
default:
{
throw new ArgumentOutOfRangeException("collisionOption", collisionOption, null);
}
}
}
File.Move(_path, candidatePath);
_path = candidatePath;
return this;
}
}
public async Task<IFile> CopyAsync(string newPath, CollisionOption collisionOption = CollisionOption.ReplaceExisting,
CancellationToken cancellationToken = default(CancellationToken))
{
// Make sure the source file exists
EnsureExists();
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
using (Stream source = File.Open(_path, FileMode.Open))
{
const int bufferSize = 4096;
#if __UNIFIED__ || _ANDROID_
using (Stream destination = File.Create(newPath, bufferSize))
#else
using (Stream destination = File.Create(newPath, bufferSize, FileOptions.Asynchronous))
#endif
{
await source.CopyToAsync(destination, bufferSize, cancellationToken);
}
}
return new DotNetFile(newPath);
}
