oecs-sharp/Game.Blackjack/Commands/StandCommand.cs

using MessagePack;
using OECS;

namespace Game.Blackjack;

/// <summary>
/// Player stands: advance to the dealer's turn.
/// </summary>
[MessagePackObject]
public struct StandCommand : ICommand
{
    public void Execute(World world)
    {
        ref var state = ref world.GetSingleton<GameState>();

        if (state.Phase != GamePhase.PlayerTurn)
            return;

        state.Phase = GamePhase.DealerTurn;
        world.MarkModified<GameState>(World.SingletonEntity);
    }
}