public static GridBuilder UpdatedForRequest(this GridBuilder builder, PlacePieceRequest r)
{
if (r.Piece == PlacePieceRequest.Move.X)
{
builder.WithXAt(r.Position);
}
else
{
builder.WithOAt(r.Position);
}
return(builder);
}
public void Execute(PlacePieceRequest r)
{
var existingGrid = _persistence.Read();
switch (r?.Piece)
{
case null:
case PlacePieceRequest.Move.O when existingGrid.WhoMovedLast() == Grid.Player.Nobody:
case PlacePieceRequest.Move.X when existingGrid.WhoMovedLast() == Grid.Player.PlayerX:
return;
}
if (Grid.PieceType.Blank != existingGrid.Pieces[r.Position])
{
return;
}
var builder = new GridBuilder(existingGrid);
_persistence.Save(builder.UpdatedForRequest(r).Build());
}
private void PlacePiece(PlacePieceRequest request) => new PlacePiece(this).Execute(request);