public string LockFile(string userName, string currentDirectory, string fileName)
{
currentDirectory = NormalizeCurrentDirectory(currentDirectory);
if (!PathUtils.IsAbsolutePath(fileName))
{
fileName = PathUtils.CombinePath(currentDirectory, fileName);
}
string[] directoryParts = PathUtils.SplitPath(fileName);
IFileSystemItem currentItem = this.root;
for (int i = 0; i < directoryParts.Length; i++)
{
currentItem = currentItem.ChildItems.FirstOrDefault(item => FileSystemItemNameComparer.Equals(item.Name, directoryParts[i]));
if (currentItem is null)
{
throw new FileSystemConsoleException("Destination path is not exists.");
}
}
if (currentItem.Kind != FileSystemItemKind.File)
{
throw new FileSystemConsoleException("Destination path is not a file.");
}
currentItem.Lock(userName);
return(fileName);
}