added forge addon

addons/forge/nodes/ForgeAttributeSet.cs

@@ -0,0 +1,86 @@
+// Copyright © Gamesmiths Guild.
+
+using System;
+using System.Diagnostics;
+using System.Linq;
+using System.Reflection;
+using Gamesmiths.Forge.Attributes;
+using Gamesmiths.Forge.Godot.Editor.Attributes;
+using Godot;
+using Godot.Collections;
+
+namespace Gamesmiths.Forge.Godot.Nodes;
+
+[Tool]
+[GlobalClass]
+[Icon("uid://dnqaqpc02lx3p")]
+public partial class ForgeAttributeSet : Node
+{
+	[Export]
+	public string AttributeSetClass { get; set; } = string.Empty;
+
+	[Export]
+	public Dictionary<string, AttributeValues>? InitialAttributeValues { get; set; }
+
+	public override void _Ready()
+	{
+		base._Ready();
+
+		InitialAttributeValues ??= [];
+	}
+
+	public AttributeSet? GetAttributeSet()
+	{
+		if (string.IsNullOrEmpty(AttributeSetClass))
+		{
+			return null;
+		}
+
+		Debug.Assert(
+			InitialAttributeValues is not null,
+			$"{nameof(InitialAttributeValues)} should have been initialized on _Ready.");
+
+		Type? type = AppDomain.CurrentDomain.GetAssemblies()
+			.SelectMany(x => x.GetTypes())
+			.FirstOrDefault(x => x.Name == AttributeSetClass);
+
+		if (type is null || !typeof(AttributeSet).IsAssignableFrom(type))
+		{
+			return null;
+		}
+
+		var instance = (AttributeSet?)Activator.CreateInstance(type);
+		if (instance is null)
+		{
+			return null;
+		}
+
+		foreach (PropertyInfo prop in type.GetProperties(BindingFlags.Public | BindingFlags.Instance))
+		{
+			if (prop.PropertyType == typeof(EntityAttribute))
+			{
+				var name = prop.Name;
+				if (InitialAttributeValues.TryGetValue(name, out AttributeValues? value))
+				{
+					SetAttributeValue("SetAttributeBaseValue", instance, prop, value.Default);
+					SetAttributeValue("SetAttributeMinValue", instance, prop, value.Min);
+					SetAttributeValue("SetAttributeMaxValue", instance, prop, value.Max);
+				}
+			}
+		}
+
+		return instance;
+	}
+
+	private static void SetAttributeValue(string methodName, AttributeSet instance, PropertyInfo prop, int value)
+	{
+#pragma warning disable S3011 // Reflection should not be used to increase accessibility of classes, methods, or fields
+		// Do not attempt this in production environments without adult supervision.
+		MethodInfo? method = typeof(AttributeSet).GetMethod(
+			methodName,
+			BindingFlags.Static | BindingFlags.NonPublic);
+#pragma warning restore S3011 // Reflection should not be used to increase accessibility of classes, methods, or fields
+
+		method?.Invoke(null, [(EntityAttribute?)prop.GetValue(instance), value]);
+	}
+}