Final version

TimetableDesigner.Backend.Events/BuilderExtensions.cs

@@ -0,0 +1,21 @@
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace TimetableDesigner.Backend.Events;
+
+public static class BuilderExtensions
+{
+    public static IServiceCollection AddEventQueue<T>(this IServiceCollection services, Action<T> configuration) where T : EventQueue, new()
+    {
+        T builder = new T();
+        configuration(builder);
+        builder.Setup(services);
+        return services;
+    }
+
+    public static void AddEventHandler<T>(this WebApplication app, Func<T, Task> handler) where T : class
+    {
+        IEventQueueSubscriber subscriber = app.Services.GetService<IEventQueueSubscriber>()!;
+        subscriber.Subscribe(handler);
+    }
+}

TimetableDesigner.Backend.Events/Class1.cs

@@ -1,5 +0,0 @@
-namespace TimetableDesigner.Backend.Events;
-
-public class Class1
-{
-}

TimetableDesigner.Backend.Events/EventQueue.cs

@@ -0,0 +1,8 @@
+using Microsoft.Extensions.DependencyInjection;
+
+namespace TimetableDesigner.Backend.Events;
+
+public abstract class EventQueue
+{
+    internal abstract void Setup(IServiceCollection services);
+}

TimetableDesigner.Backend.Events/IEventQueuePublisher.cs

@@ -0,0 +1,6 @@
+namespace TimetableDesigner.Backend.Events;
+
+public interface IEventQueuePublisher
+{
+    public Task PublishAsync<T>(T data) where T : class;
+}

TimetableDesigner.Backend.Events/IEventQueueSubscriber.cs

@@ -0,0 +1,6 @@
+namespace TimetableDesigner.Backend.Events;
+
+public interface IEventQueueSubscriber
+{
+    void Subscribe<T>(Func<T, Task> handler) where T : class;
+}

TimetableDesigner.Backend.Events/TimetableDesigner.Backend.Events.csproj

@@ -6,4 +6,15 @@
         <Nullable>enable</Nullable>
     </PropertyGroup>
 
+    <ItemGroup>
+      <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="10.0.2" />
+      <PackageReference Include="Microsoft.Extensions.Hosting.Abstractions" Version="10.0.2" />
+    </ItemGroup>
+
+    <ItemGroup>
+      <Reference Include="Microsoft.AspNetCore">
+        <HintPath>C:\Program Files\dotnet\shared\Microsoft.AspNetCore.App\10.0.2\Microsoft.AspNetCore.dll</HintPath>
+      </Reference>
+    </ItemGroup>
+
 </Project>