feat: more plugin work and intra-scope communication

addons/GodotDI/ServiceSource.cs

@@ -1,7 +1,9 @@
 using System;
+using System.Linq;
 using System.Reflection;
 using Godot;
 using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.Logging;
 using OwofGames.GodotLume;
 
 namespace GodotHostTest.GodotDI;
@@ -13,18 +15,33 @@ public partial class ServiceSource : Node
     [Export] private string _serviceScope = RootScopeQualifiedName;
     [Export] protected Node?[] InjectedNodes = [];
 
-    internal void ResolveInjectedNodes(IServiceProvider serviceProvider)
+    internal void ResolveInjectedNodes(IServiceProvider serviceProvider, Delegate? onScopeCreated)
     {
+        var logger = serviceProvider.GetRequiredService<ILogger<ServiceSource>>();
+
         // if this service source must also act as a scope, create the scope and use its service provider
         if (_serviceScope != RootScopeQualifiedName)
         {
+            // create the scoped provider
+            var serviceScope = ScopeTypesAndNames.GetType(_serviceScope);
+            var scopedProvider = serviceProvider
+                .GetRequiredService<IProvider>()
+                .GetScopedProvider(serviceScope);
+            // convert it also to an IServiceProvider
             var serviceProviderCreator = serviceProvider.GetRequiredService<Func<IProvider, IServiceProvider>>();
-            var scopedProvider = serviceProvider.GetRequiredService<IProvider>()
-                .GetScopedProvider(ScopeTypesAndNames.GetType(_serviceScope));
             serviceProvider = serviceProviderCreator(scopedProvider);
-            // serviceProvider = serviceProvider
-            //     .CreateScope()
-            //     .ServiceProvider;
+            // invoke onScopeCreated, if present
+            // TODO: replace with a source code generation by turning this method private partial with Action<IProvider> argument, and every invocation site calls the necessary provider.Get<...> to build the argument list
+            if (onScopeCreated != null)
+            {
+                var parameters = onScopeCreated.Method.GetParameters()
+                    .Select(parameterInfo => scopedProvider.Get(parameterInfo.ParameterType));
+                onScopeCreated.DynamicInvoke(parameters);
+            }
+        }
+        else if (onScopeCreated != null)
+        {
+            logger.LogWarning("onScopeCreated passed during instantiation, but no scoped provider was created.");
         }
 
         // resolve the injected nodes against the chosen service provider
@@ -32,6 +49,7 @@ public partial class ServiceSource : Node
         foreach (var node in InjectedNodes)
         {
             if (node == null) continue;
+            logger.LogTrace("Injecting {Node}.", node.Name);
             var nodeType = node.GetType();
             foreach (var field in nodeType
                          .GetFields(BindingFlags.Instance | BindingFlags.Public | BindingFlags.NonPublic))