base structure

2026-07-17 09:59:07 +02:00
parent e560a743fb
commit 96fffb2f9e
25 changed files with 466 additions and 55 deletions
@@ -0,0 +1,58 @@
+using System;
+using System.Reflection;
+using Godot;
+using Microsoft.Extensions.DependencyInjection;
+using OwofGames.GodotLume;
+
+namespace GodotHostTest.GodotDI;
+
+[Icon("res://addons/GodotDI/ServiceSource.svg")]
+public partial class ServiceSource : Node
+{
+    [Export] private string _serviceScope = typeof(RootScope).AssemblyQualifiedName!;
+    [Export] protected Node?[] InjectedNodes = [];
+
+    internal void ResolveInjectedNodes(IServiceProvider serviceProvider)
+    {
+        // if this service source must also act as a scope, create the scope and use its service provider
+        if (_serviceScope != "")
+        {
+            serviceProvider = serviceProvider
+                .CreateScope()
+                .ServiceProvider;
+        }
+
+        // resolve the injected nodes against the chosen service provider
+        // TODO: move to source generator, make it the only way for injection
+        foreach (var node in InjectedNodes)
+        {
+            if (node == null) continue;
+            var nodeType = node.GetType();
+            foreach (var field in nodeType
+                         .GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))
+            {
+                if (field.GetCustomAttribute<InjectAttribute>() == null) continue;
+                var fieldType = field.FieldType;
+                var service = serviceProvider.GetRequiredService(fieldType);
+                field.SetValue(node, service);
+            }
+
+            foreach (var method in nodeType.GetMethods(BindingFlags.Instance | BindingFlags.Public |
+                                                       BindingFlags.NonPublic))
+            {
+                if (method.GetCustomAttribute<InjectAttribute>() == null) continue;
+                var parameters = method.GetParameters();
+                var values = new object?[parameters.Length];
+                var i = 0;
+                foreach (var parameter in parameters)
+                {
+                    var parameterType = parameter.ParameterType;
+                    var service = serviceProvider.GetRequiredService(parameterType);
+                    values[i++] = service;
+                }
+
+                method.Invoke(node, values);
+            }
+        }
+    }
+}