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))]
    [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 (playerInputComponent.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
                            )
                        );
                    }
                }
            }
        }
    }
}