/// <summary>
/// Ctor <see cref="HandsHistoryMemento"/>.
/// </summary>
public HandsHistoryMemento(IReadOnlyList <Hand> hands,
HandsHistoryMemento previous = null, HandsHistoryMemento next = null)
{
Hands = hands;
Previous = previous;
Next = next;
}
/// <inheritdoc />
public bool SaveHands(IReadOnlyList <Hand> hands)
{
_hands = hands ?? throw new ArgumentNullException(nameof(hands));
// New hands -> new memento snapshot!
_memento = new HandsHistoryMemento(_hands);
UpdateUsers();
return(true);
}
/// <inheritdoc />
/// <remarks>
/// Memento use only on removed/restore hands.
/// </remarks>
public bool RemoveHand(string id)
{
CheckHands();
var hand = _hands.FirstOrDefault(x => x.Id == id);
if (hand == null)
{
_notificationManager.ShowErrorMessage($"Can not find in collection hand by id {id}");
return(false);
}
_hands = _hands.Where(x => x.Id != id).ToList();
_memento = _memento.AddNext(new HandsHistoryMemento(_hands, _memento));
UpdateUsers();
return(true);
}
/// <inheritdoc />
public void Redo()
{
if (_memento == null)
{
_notificationManager.ShowErrorMessage("Please, change path where are hands");
return;
}
if (_memento.Next != null)
{
_hands = _memento.Next.Hands;
_memento = _memento.Next;
UpdateUsers();
}
else
{
_notificationManager.ShowMessage("Can not do 'redo'");
}
}
/// <inheritdoc />
public void SaveHandsHistoryPath(string path)
{
if (path.IsEmpty())
{
throw new ArgumentNullException(nameof(path));
}
var files = DirectoryUtils.DirectoryDirSearch(path, new List <string>(), true);
if (files.IsEmpty())
{
throw new EmptyFolderException(path);
}
_hands = _parser.ParseHandsByFilePath(files);
CheckHands();
UpdateUsers();
// New files -> new memento snapshot!
_memento = new HandsHistoryMemento(_hands);
}
/// <summary>
/// Add next memento.
/// </summary>
public HandsHistoryMemento AddNext(HandsHistoryMemento memento)
{
Next = memento;
return(memento);
}
