Refactor (#62)

Co-authored-by: js6pak <kubastaron@hotmail.com>

Reactor/Networking/Attributes/MessageConverterAttribute.cs

@@ -0,0 +1,48 @@
+using System;
+using System.Collections.Generic;
+using System.Reflection;
+using BepInEx.Unity.IL2CPP;
+using HarmonyLib;
+using Reactor.Networking.Serialization;
+
+namespace Reactor.Networking.Attributes;
+
+[AttributeUsage(AttributeTargets.Class)]
+public class MessageConverterAttribute : Attribute
+{
+    private static readonly HashSet<Assembly> _registeredAssemblies = new();
+    
+    public static void Register(Assembly assembly)
+    {
+        if (_registeredAssemblies.Contains(assembly)) return;
+        _registeredAssemblies.Add(assembly);
+
+        foreach (var type in assembly.GetTypes())
+        {
+            var attribute = type.GetCustomAttribute<MessageConverterAttribute>();
+
+            if (attribute != null)
+            {
+                if (!type.IsSubclassOf(typeof(UnsafeMessageConverter)))
+                {
+                    throw new InvalidOperationException($"Type {type.FullDescription()} has {nameof(MessageConverterAttribute)} but doesn't extend {nameof(UnsafeMessageConverter)}.");
+                }
+
+                try
+                {
+                    var messageConverter = (UnsafeMessageConverter) Activator.CreateInstance(type)!;
+                    MessageSerializer.Register(messageConverter);
+                }
+                catch (Exception e)
+                {
+                    Warning($"Failed to register {type.FullDescription()}: {e}");
+                }
+            }
+        }
+    }
+
+    internal static void Initialize()
+    {
+        IL2CPPChainloader.Instance.PluginLoad += (_, assembly, _) => Register(assembly);
+    }
+}