Added logic for modules to be initialized on startup

Author: Felix-CodingClimber

src/DotNetElements.AppFramework.AspNet/IStartupModule.cs

@@ -0,0 +1,9 @@
+using Microsoft.AspNetCore.Builder;
+
+namespace DotNetElements.AppFramework.AspNet;
+
+// todo better error handling
+public interface IStartupModule
+{
+    Task InitAsync(WebApplication app);
+}

src/DotNetElements.AppFramework.AspNet/Modules/WebApplicationExtensions.cs

@@ -15,6 +15,15 @@ public static WebApplication MapModuleEndpoints(this WebApplication app)
         return app;
     }
 
+    // todo better error handling
+    public static async Task InitModulesAsync(this WebApplication app)
+    {
+        ArgumentNullException.ThrowIfNull(WebApplicationBuilderExtensions.RegisteredModules);
+
+        foreach (IStartupModule module in WebApplicationBuilderExtensions.RegisteredModules.OfType<IStartupModule>())
+            await module.InitAsync(app);
+    }
+
     public static WebApplication MigrateDatabase<TDbContext>(this WebApplication app)
         where TDbContext : DbContext
     {

src/DotNetElements.AppFramework.AspNet/WebApplicationExtensions.cs

@@ -6,12 +6,12 @@ namespace DotNetElements.AppFramework.AspNet;
 
 public static class WebApplicationExtensions
 {
-    public static WebApplication UseAppFramework(this WebApplication app)
+    public static async Task UseAppFrameworkAsync(this WebApplication app)
     {
         app.UseSerilogRequestLogging();
 
         app.MapModuleEndpoints();
 
-        return app;
+        await app.InitModulesAsync();
     }
 }