PongFE/PongFE/Engines/InputEngine.cs

using Encompass;
using Microsoft.Xna.Framework.Input;
using PongFE.Components;
using PongFE.Enums;
using PongFE.Messages;

namespace PongFE.Engines
{
    [Reads(typeof(PlayerInputComponent), typeof(PlayerComponent))]
    [Sends(typeof(PaddleMoveMessage))]
    public class InputEngine : Engine
    {
        public override void Update(double dt)
        {
            var keyboardState = Keyboard.GetState();

            foreach (ref readonly var playerInputEntity in ReadEntities<PlayerInputComponent>())
            {
                ref readonly var playerInputComponent = ref GetComponent<PlayerInputComponent>(playerInputEntity);
                if (HasComponent<PlayerComponent>(playerInputEntity))
                {
                    ref readonly var playerComponent = ref GetComponent<PlayerComponent>(playerInputEntity);
                    if (playerComponent.PlayerIndex == PlayerIndex.One)
                    {
                        if (keyboardState.IsKeyDown(Keys.Down))
                        {
                            SendMessage(
                                new PaddleMoveMessage(
                                    playerInputEntity,
                                    PaddleMoveDirection.Down
                                )
                            );
                        }
                        else if (keyboardState.IsKeyDown(Keys.Up))
                        {
                            SendMessage(
                                new PaddleMoveMessage(
                                    playerInputEntity,
                                    PaddleMoveDirection.Up
                                )
                            );
                        }
                    }
                }
            }
        }
    }
}