feat: Networked Keyboard Inputs

Game/Behaviours/KeyboardInputsBehaviour.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-
 using Microsoft.Xna.Framework.Input;
 
 using Syntriax.Engine.Core;

Game/Behaviours/NetworkedKeyboardInputs.cs

@@ -0,0 +1,122 @@
+using System;
+using System.Collections.Generic;
+using LiteNetLib;
+using Microsoft.Xna.Framework.Input;
+using Syntriax.Engine.Input;
+using Syntriax.Engine.Network;
+
+namespace Pong.Behaviours;
+
+public class NetworkedKeyboardInputs : NetworkBehaviour, IButtonInputs<Keys>
+{
+    private readonly Dictionary<Keys, Action<IButtonInputs<Keys>, Keys>> OnPressed = new(256);
+    private readonly Dictionary<Keys, Action<IButtonInputs<Keys>, Keys>> OnReleased = new(256);
+
+    private int cachePressedCurrentlyCount = 0;
+    private readonly Keys[] cachePressedCurrently = new Keys[256];
+
+    private int cachePressedPreviouslyCount = 0;
+    private readonly Keys[] cachePressedPreviously = new Keys[256];
+
+    public void RegisterOnPress(Keys key, Action<IButtonInputs<Keys>, Keys> callback)
+    {
+        if (OnPressed.TryGetValue(key, out var action))
+        {
+            action += callback;
+            return;
+        }
+
+        OnPressed.Add(key, callback);
+    }
+
+    public void UnregisterOnPress(Keys key, Action<IButtonInputs<Keys>, Keys> callback)
+    {
+        if (OnPressed.TryGetValue(key, out var action))
+            action -= callback;
+    }
+
+    public void RegisterOnRelease(Keys key, Action<IButtonInputs<Keys>, Keys> callback)
+    {
+        if (OnReleased.TryGetValue(key, out var action))
+        {
+            action += callback;
+            return;
+        }
+
+        OnReleased.Add(key, callback);
+    }
+
+    public void UnregisterOnRelease(Keys key, Action<IButtonInputs<Keys>, Keys> callback)
+    {
+        if (OnReleased.TryGetValue(key, out var action))
+            action -= callback;
+    }
+
+    protected override void OnUpdate()
+    {
+        if (!IsServer && !LocalAssigned)
+            return;
+
+        KeyboardState keyboardState = Keyboard.GetState();
+        keyboardState.GetPressedKeys(cachePressedCurrently);
+        cachePressedCurrentlyCount = keyboardState.GetPressedKeyCount();
+
+        for (int i = 0; i < cachePressedCurrentlyCount; i++)
+        {
+            Keys currentlyPressedKey = cachePressedCurrently[i];
+
+            if (!OnPressed.TryGetValue(currentlyPressedKey, out var action))
+                continue;
+
+            if (WasPressed(currentlyPressedKey))
+                continue;
+
+            action.Invoke(this, currentlyPressedKey);
+        }
+
+        for (int i = 0; i < cachePressedPreviouslyCount; i++)
+        {
+            Keys previouslyPressedKey = cachePressedPreviously[i];
+
+            if (!OnReleased.TryGetValue(previouslyPressedKey, out var action))
+                continue;
+
+            if (IsPressed(previouslyPressedKey))
+                continue;
+
+            action.Invoke(this, previouslyPressedKey);
+        }
+
+        Array.Copy(cachePressedCurrently, cachePressedPreviously, cachePressedCurrentlyCount);
+        cachePressedPreviouslyCount = cachePressedCurrentlyCount;
+    }
+
+    public bool IsPressed(Keys key)
+    {
+        for (int i = 0; i < cachePressedCurrentlyCount; i++)
+            if (cachePressedCurrently[i] == key)
+                return true;
+        return false;
+    }
+
+    public bool WasPressed(Keys key)
+    {
+        for (int i = 0; i < cachePressedPreviouslyCount; i++)
+            if (cachePressedPreviously[i] == key)
+                return true;
+        return false;
+    }
+
+    protected override void OnMessageReceived(NetPacketReader reader, NetPeer peer)
+    {
+        bool isPressed = reader.GetBool();
+        Keys key = (Keys)reader.GetInt();
+
+        if (isPressed)
+            if (OnPressed.TryGetValue(key, out var action))
+                action.Invoke(this, key);
+        if (!isPressed)
+            if (OnReleased.TryGetValue(key, out var action))
+                action.Invoke(this, key);
+    }
+}