/// <summary>
/// Opens the file
/// </summary>
/// <param name="fileAccess">Specifies whether the file should be opened in read-only or read/write mode</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>A <see cref="Stream"/> which can be used to read from or write to the file</returns>
public async Task <Stream> OpenAsync(FileAccess fileAccess, CancellationToken cancellationToken)
{
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
if (fileAccess == FileAccess.Read)
{
return(File.OpenRead(Path));
}
else if (fileAccess == FileAccess.ReadAndWrite)
{
return(File.Open(Path, FileMode.Open, System.IO.FileAccess.ReadWrite));
}
else
{
throw new ArgumentException("Unrecognized FileAccess value: " + fileAccess);
}
}
/// <summary>
/// Checks whether a folder or file exists at the given location.
/// </summary>
/// <param name="name">The name of the file or folder to check for.</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// A task whose result is the result of the existence check.
/// </returns>
public async Task <ExistenceCheckResult> CheckExistsAsync(string name, CancellationToken cancellationToken)
{
Requires.NotNullOrEmpty(name, "name");
await AwaitExtensions.SwitchOffMainThreadAsync(cancellationToken);
string checkPath = PortablePath.Combine(this.Path, name);
if (File.Exists(checkPath))
{
return(ExistenceCheckResult.FileExists);
}
else if (Directory.Exists(checkPath))
{
return(ExistenceCheckResult.FolderExists);
}
else
{
return(ExistenceCheckResult.NotFound);
}
}
