fix: refactor DefaultJsonPatchGenerator to use IServiceProvider for I…

src/JsonPatchGenerator/DefaultJsonPatchGenerator.cs

@@ -4,19 +4,23 @@
 using Firebend.JsonPatch.Models;
 using Microsoft.AspNetCore.JsonPatch;
 using Microsoft.AspNetCore.JsonPatch.Operations;
+using Microsoft.Extensions.DependencyInjection;
 using Newtonsoft.Json;
 
 namespace Firebend.JsonPatch;
 
 public class DefaultJsonPatchGenerator : IJsonPatchGenerator
 {
     private readonly IJsonDiffDetector _diffDetector;
-    private readonly Func<IJsonPatchWriter> _writerFactory;
+    private readonly IServiceProvider _serviceProvider;
     private readonly IJsonDiffSettingsProvider _settings;
-    public DefaultJsonPatchGenerator(IJsonDiffDetector diffDetector, Func<IJsonPatchWriter> writerFactory, IJsonDiffSettingsProvider settings)
+
+    public DefaultJsonPatchGenerator(IJsonDiffDetector diffDetector,
+        IServiceProvider serviceProvider,
+        IJsonDiffSettingsProvider settings)
     {
         _diffDetector = diffDetector;
-        _writerFactory = writerFactory;
+        _serviceProvider = serviceProvider;
         _settings = settings;
     }
 
@@ -42,7 +46,8 @@ public JsonPatchDocument<T> Generate<T>(T original, T modified)
 
         if (!diffs.Any()) { return new(); }
 
-        var writer = _writerFactory();
+        using var scope = _serviceProvider.CreateScope();
+        var writer = scope.ServiceProvider.GetRequiredService<IJsonPatchWriter>();
 
         foreach (var jsonDiff in diffs)
         {

src/JsonPatchGenerator/Extensions/ServiceCollectionExtensions.cs

@@ -46,10 +46,7 @@ public static IServiceCollection AddJsonPatchGenerator(this IServiceCollection c
 
         collection.TryAddSingleton<IJsonDiffSettingsProvider>(new JsonDiffSettingsProvider(settings));
         collection.TryAddTransient<IJsonPatchWriter, JsonPatchWriter>();
-        collection.TryAddTransient<IJsonPatchGenerator>(sp =>
-            new DefaultJsonPatchGenerator(sp.GetRequiredService<IJsonDiffDetector>(),
-                sp.GetRequiredService<IJsonPatchWriter>,
-                sp.GetRequiredService<IJsonDiffSettingsProvider>()));
+        collection.TryAddTransient<IJsonPatchGenerator, DefaultJsonPatchGenerator>();
         collection.TryAddTransient<IJsonDiffDetector, JsonDiffDetector>();
 
         return collection;