Enhancements and additions to Reactor Networking (#91)

* Update ExtraMessageExtensions.cs

Added enum methods

* Update MessageSerializer.cs

Add enum serialisation

* Oops documentation fix

* Fix errors + add long serialisation

* Correction: ulong not long

* Specify format

* Add long serialisation + improve enum serialisation

* Add a shorthand method

* Removed generic enum write and fix long write

* Add generic converter support + read enum improvement

* Remove leftover code

* Better long serialisation

* Serialise the array directly

* Allow serialising color values

* Update .gitignore

* Update ExtraMessageExtensions.cs

* Discard changes to .gitignore

Reactor/Networking/Attributes/MessageConverterAttribute.cs

@@ -38,8 +38,7 @@ public sealed class MessageConverterAttribute : Attribute
 
                 try
                 {
-                    var messageConverter = (UnsafeMessageConverter) Activator.CreateInstance(type)!;
-                    MessageSerializer.Register(messageConverter);
+                    MessageSerializer.Register(type);
                 }
                 catch (Exception e)
                 {
@@ -52,5 +51,6 @@ public sealed class MessageConverterAttribute : Attribute
     internal static void Initialize()
     {
         IL2CPPChainloader.Instance.PluginLoad += (_, assembly, _) => Register(assembly);
+        IL2CPPChainloader.Instance.Finished += MessageSerializer.ClearMaps;
     }
 }

Reactor/Networking/Extensions/ExtraMessageExtensions.cs

@@ -1,6 +1,8 @@
 using System;
+using System.Globalization;
 using Hazel;
 using Hazel.Udp;
+using Reactor.Networking.Serialization;
 using UnityEngine;
 
 namespace Reactor.Networking.Extensions;
@@ -12,10 +14,11 @@ public static class ExtraMessageExtensions
 {
     private const float MIN = -50f;
     private const float MAX = 50f;
+    private const float DIFF = MAX - MIN;
 
     private static float ReverseLerp(float t)
     {
-        return Mathf.Clamp((t - MIN) / (MAX - MIN), 0f, 1f);
+        return Mathf.Clamp01((t - MIN) / DIFF);
     }
 
     /// <summary>
@@ -32,6 +35,33 @@ public static class ExtraMessageExtensions
         writer.Write(y);
     }
 
+    /// <summary>
+    /// Writes an Enum value to the <paramref name="writer"/>.
+    /// </summary>
+    /// <param name="writer">The <see cref="MessageWriter"/> to write to.</param>
+    /// <param name="value">The <see cref="Enum"/> to write.</param>
+    public static void Write(this MessageWriter writer, Enum value) => writer.Serialize(Convert.ChangeType(value, Enum.GetUnderlyingType(value.GetType()), CultureInfo.InvariantCulture));
+
+    /// <summary>
+    /// Writes a long value to the <paramref name="writer"/>.
+    /// </summary>
+    /// <param name="writer">The <see cref="MessageWriter"/> to write to.</param>
+    /// <param name="value">The <see cref="long"/> to write.</param>
+    public static void Write(this MessageWriter writer, long value) => writer.Write(BitConverter.GetBytes(value));
+
+    /// <summary>
+    /// Writes a color value to the <paramref name="writer"/>.
+    /// </summary>
+    /// <param name="writer">The <see cref="MessageWriter"/> to write to.</param>
+    /// <param name="value">The <see cref="Color32"/> to write.</param>
+    public static void Write(this MessageWriter writer, Color32 value)
+    {
+        writer.Write(value.r);
+        writer.Write(value.g);
+        writer.Write(value.b);
+        writer.Write(value.a);
+    }
+
     /// <summary>
     /// Reads a <see cref="Vector2"/> from the <paramref name="reader"/>.
     /// </summary>
@@ -45,6 +75,43 @@ public static class ExtraMessageExtensions
         return new Vector2(Mathf.Lerp(MIN, MAX, x), Mathf.Lerp(MIN, MAX, y));
     }
 
+    /// <summary>
+    /// Reads an enum value and casts it to the specified type from a network message.
+    /// </summary>
+    /// <param name="reader">The <see cref="MessageReader"/> to read from.</param>
+    /// <typeparam name="T">The <see cref="Enum"/> type to convert to.</typeparam>
+    /// <returns>An <see cref="Enum"/> value from the <paramref name="reader"/>.</returns>
+    public static T ReadEnum<T>(this MessageReader reader) where T : struct, Enum => (T) reader.ReadEnum(typeof(T));
+
+    /// <summary>
+    /// Reads an enum value from a network message.
+    /// </summary>
+    /// <param name="reader">The <see cref="MessageReader"/> to read from.</param>
+    /// <param name="enumType">The type of the enum.</param>
+    /// <returns>The resulting enum value from the <paramref name="reader"/>.</returns>
+    public static object ReadEnum(this MessageReader reader, Type enumType) => Enum.ToObject(enumType, reader.Deserialize(Enum.GetUnderlyingType(enumType)));
+
+    /// <summary>
+    /// Reads a long value from a network message.
+    /// </summary>
+    /// <param name="reader">The <see cref="MessageReader"/> to read from.</param>
+    /// <returns>The resulting long value from the <paramref name="reader"/>.</returns>
+    public static long ReadInt64(this MessageReader reader) => BitConverter.ToInt64(reader.ReadBytes(8), 0);
+
+    /// <summary>
+    /// Reads a color value from a network message.
+    /// </summary>
+    /// <param name="reader">The <see cref="MessageReader"/> to read from.</param>
+    /// <returns>The resulting Color32 value from the <paramref name="reader"/>.</returns>
+    public static Color32 ReadColor32(this MessageReader reader) => new(reader.ReadByte(), reader.ReadByte(), reader.ReadByte(), reader.ReadByte());
+
+    /// <summary>
+    /// Reads a color value from a network message.
+    /// </summary>
+    /// <param name="reader">The <see cref="MessageReader"/> to read from.</param>
+    /// <returns>The resulting Color value from the <paramref name="reader"/>.</returns>
+    public static Color ReadColor(this MessageReader reader) => new(reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle(), reader.ReadSingle());
+
     /// <summary>
     /// Sends a message on the <paramref name="connection"/> with an <paramref name="ackCallback"/>.
     /// </summary>

Reactor/Networking/Serialization/MessageSerializer.cs

@@ -15,33 +15,83 @@ public static class MessageSerializer
     private static List<UnsafeMessageConverter> MessageConverters { get; } = new();
 
     private static Dictionary<Type, UnsafeMessageConverter?> MessageConverterMap { get; } = new();
+    private static Dictionary<Type, Type> GenericConvertersMap { get; } = new();
+
+    internal static void ClearMaps()
+    {
+        MessageConverterMap.Clear();
+    }
 
     /// <summary>
     /// Registers a MessageConverter.
     /// </summary>
-    /// <param name="messageConverter">The MessageConverter to be registered.</param>
-    public static void Register(UnsafeMessageConverter messageConverter)
+    /// <param name="type">The Type of the MessageConverter to be registered.</param>
+    public static void Register(Type type)
     {
-        MessageConverters.Add(messageConverter);
-        MessageConverterMap.Clear();
+        if (type.IsGenericTypeDefinition)
+        {
+            var baseType = type.BaseType!;
+
+            if (!baseType.Name.Contains("MessageConverter"))
+                throw new InvalidOperationException($"{type.Name} should directly inherit from MessageConverter<T>");
+
+            var generics = baseType.GetGenericArguments();
+            var param = generics[0];
+
+            GenericConvertersMap.Add(param.GetGenericTypeDefinition(), type);
+        }
+        else
+        {
+            var messageConverter = (UnsafeMessageConverter) Activator.CreateInstance(type)!;
+            MessageConverters.Add(messageConverter);
+        }
     }
 
     /// <summary>
     /// Finds a MessageConverter for the specified <paramref name="type"/>.
     /// </summary>
     /// <param name="type">The type of an object.</param>
-    /// <returns>A MessageConverted that can convert the specified <see cref="Type"/>.</returns>
+    /// <returns>A MessageConverter that can convert the specified <see cref="Type"/>.</returns>
     public static UnsafeMessageConverter? FindConverter(Type type)
     {
-        if (MessageConverterMap.TryGetValue(type, out var value))
+        if (!MessageConverterMap.TryGetValue(type, out var value))
         {
-            return value;
+            value = MessageConverters.SingleOrDefault(x => x.CanConvert(type));
+
+            if (value == null)
+                return null;
+
+            MessageConverterMap.Add(type, value);
         }
 
-        var converter = MessageConverters.SingleOrDefault(x => x.CanConvert(type));
-        MessageConverterMap.Add(type, converter);
+        return value;
+    }
 
-        return converter;
+    /// <summary>
+    /// Finds and builds a MessageConverter for the specified <paramref name="type"/> using a registered generic converter.
+    /// </summary>
+    /// <param name="type">The type of an object.</param>
+    /// <returns>A MessageConverter that can convert the specified <see cref="Type"/>.</returns>
+    public static UnsafeMessageConverter? FindGenericConverter(Type type)
+    {
+        if (MessageConverterMap.TryGetValue(type, out var value))
+            return value;
+
+        if (!type.IsGenericType)
+            return null;
+
+        var typeDef = type.GetGenericTypeDefinition();
+
+        if (!GenericConvertersMap.TryGetValue(typeDef, out var builder))
+            return null;
+
+        var generic = builder.MakeGenericType(type.GetGenericArguments());
+        value = (UnsafeMessageConverter) Activator.CreateInstance(generic)!;
+
+        MessageConverters.Add(value);
+        MessageConverterMap.Add(type, value);
+
+        return value;
     }
 
     /// <summary>
@@ -49,7 +99,7 @@ public static class MessageSerializer
     /// </summary>
     /// <param name="writer">The <see cref="MessageWriter"/> to write to.</param>
     /// <param name="args">The args to be written.</param>
-    public static void Serialize(MessageWriter writer, object[] args)
+    public static void Serialize(this MessageWriter writer, params object[] args)
     {
         foreach (var arg in args)
         {
@@ -87,24 +137,48 @@ public static class MessageSerializer
             case bool i:
                 writer.Write(i);
                 break;
+            case ulong i:
+                writer.Write(i);
+                break;
+            case long i:
+                ExtraMessageExtensions.Write(writer, i); // For some reason this insists on referring the to float write method, so this is me taking precautions
+                break;
             case Vector2 i:
                 writer.Write(i);
                 break;
             case string i:
                 writer.Write(i);
                 break;
+            case Color i:
+                writer.Write(i);
+                break;
+            case Color32 i:
+                writer.Write(i);
+                break;
+            case Enum i:
+                writer.Write(i);
+                break;
             default:
-                var converter = FindConverter(@object.GetType());
-                if (converter != null)
-                {
-                    converter.UnsafeWrite(writer, @object);
-                    break;
-                }
+                var type = @object.GetType();
+                var converter = FindGenericConverter(type) ?? FindConverter(type);
 
-                throw new NotSupportedException("Couldn't serialize " + @object.GetType());
+                if (converter != null)
+                    converter.UnsafeWrite(writer, @object);
+                else
+                    throw new NotSupportedException("Couldn't serialize " + type.Name);
+
+                break;
         }
     }
 
+    /// <summary>
+    /// Deserializes a generic <typeparamref name="T"/> value from the <paramref name="reader"/>.
+    /// </summary>
+    /// <param name="reader">The <see cref="MessageReader"/> to read from.</param>
+    /// <typeparam name="T">The type to be read.</typeparam>
+    /// <returns>A generic <typeparamref name="T"/> value from the <paramref name="reader"/>.</returns>
+    public static T Deserialize<T>(this MessageReader reader) => (T) reader.Deserialize(typeof(T));
+
     /// <summary>
     /// Deserializes an <see cref="object"/> of <paramref name="objectType"/> from the <paramref name="reader"/>.
     /// </summary>
@@ -158,7 +232,33 @@ public static class MessageSerializer
             return reader.ReadString();
         }
 
-        var converter = FindConverter(objectType);
+        if (objectType == typeof(ulong))
+        {
+            return reader.ReadUInt64();
+        }
+
+        if (objectType == typeof(long))
+        {
+            return reader.ReadInt64();
+        }
+
+        if (objectType == typeof(Color))
+        {
+            return reader.ReadColor();
+        }
+
+        if (objectType == typeof(Color32))
+        {
+            return reader.ReadColor32();
+        }
+
+        if (objectType.IsEnum)
+        {
+            return reader.ReadEnum(objectType);
+        }
+
+        var converter = FindGenericConverter(objectType) ?? FindConverter(objectType);
+
         if (converter != null)
         {
             return converter.UnsafeRead(reader, objectType);