Pong/Assets/Scripts/Game/Player.cs

using System;
using Unity.Netcode;
using UnityEngine;
using UnityEngine.InputSystem;

namespace Game {
	
	public enum Side {Top, Bottom}
	
	public class Player : NetworkBehaviour {

		public Side Side { get; set; }

		private int score;
		
		protected bool goingLeft, goingRight;

		// Units per second
		protected float Speed => 15;
		
		// Unit distance from zero
		protected float Border => 10;
		
		private SpeedModification speedModification;
		private BorderModification borderModification;

		protected float Width => transform.localScale.x;
		
		private float LeftEdge => X() - Width / 2;
		private float RightEdge => X() + Width / 2;

		protected float X() {
			return transform.position.x;
		}

		protected float Y() {
			return transform.position.y;
		}

		protected void ClampInsideBorders() {
			if (LeftEdge < -Border)
				transform.Translate(Vector2.right * (-Border - LeftEdge), Space.World);
			if (RightEdge > Border) 
				transform.Translate(Vector2.left * (RightEdge - Border), Space.World);
		}

		protected void TryLinearMove(float h) {
			Vector2 trans = new Vector2((goingLeft ? -1 : 0) + (goingRight ? 1 : 0), 0);
			trans *= Speed * h;
			transform.Translate(trans, Space.World);
			ClampInsideBorders();
		}

		private void Start() {
			float y = Side switch {
				Side.Bottom => BorderSize.Singleton.y1,
				Side.Top => BorderSize.Singleton.y2,
				_ => throw new ArgumentOutOfRangeException()
			};
			transform.position = new Vector2(0, y);
			if (Side == Side.Top)
				transform.Rotate(transform.forward, 180);
		}
	}
	
	public class RealPlayer : Player {
		public bool isThisClient;
		
		private void FixedUpdate() {
			if (!isThisClient)
				return;
			
			var keyboard = Keyboard.current;
			goingLeft = keyboard.aKey.isPressed;
			goingRight = keyboard.dKey.isPressed;

			TryLinearMove(Time.fixedDeltaTime);
		}
	}
}