public void Visit(MakeDirectoryCommand command)
{
Visit((ICommand)command);
if (Root.TryFindNode(command.ParentDirectoryId, out var parent) &&
parent is Directory parentDirectory)
{
var existingDirectory = parentDirectory.Children.FirstOrDefault(c => c.Name == command.Name);
if (existingDirectory == null)
{
var directory = _factory.CreateDirectory(command.Name);
parentDirectory.Children.Add(directory);
_timestamp.Increment();
Message = $"ID={directory.Id}";
}
else
{
OnNodeAlreadyExists(command.Name, command.ParentDirectoryId);
}
}
else
{
OnDirectoryDoesNotExist(command.ParentDirectoryId);
}
}
private static void Initialize()
{
Factory.Reset();
Timestamp.Reset();
_root = Factory.CreateDirectory("root");
}