feat: add AddStartups method to IServiceCollection for dynamic startu…

packages/CodeDesignPlus.Net.Core/src/CodeDesignPlus.Net.Core/Extensions/ServiceCollectionExtensions.cs

@@ -32,4 +32,28 @@ public static IServiceCollection AddCore(this IServiceCollection services, IConf
 
         return services;
     }
+
+    /// <summary>
+    /// Adds the services of the specified <see cref="IStartup"/> implementations to the specified <see cref="IServiceCollection"/> using the provided <see cref="IConfiguration"/>.
+    /// </summary>
+    /// <param name="services">The <see cref="IServiceCollection"/> to add the services to.</param>
+    /// <param name="configuration">The <see cref="IConfiguration"/> used to configure the services.</param>
+    /// <returns>The modified <see cref="IServiceCollection"/> instance.</returns>
+    public static IServiceCollection AddStartups(this IServiceCollection services, IConfiguration configuration)
+    {
+        var startups = AppDomain.CurrentDomain
+            .GetAssemblies()
+            .SelectMany(x => x.GetTypes())
+            .Where(x => !x.FullName.StartsWith("Castle") || !x.FullName.Contains("DynamicProxyGenAssembly"))
+            .Where(x => typeof(IStartup).IsAssignableFrom(x) && !x.IsInterface && !x.IsAbstract)
+            .Select(x => (IStartup)Activator.CreateInstance(x))
+            .ToArray();
+
+        foreach (var startup in startups)
+        {
+            startup.Initialize(services, configuration);
+        }
+
+        return services;
+    }
 }

packages/CodeDesignPlus.Net.Core/tests/CodeDesignPlus.Net.Core.Test/Extensions/ServiceCollectionExtensionsTest.cs

@@ -66,5 +66,19 @@ public void AddCore_SameOptions_Success()
         Assert.Equal(ConfigurationUtil.CoreOptions.AppName, value.AppName);
     }
 
+    [Fact]
+    public void AddStartups_Success()
+    {
+        // Arrange
+        var configuration = ConfigurationUtil.GetConfiguration();
+
+        var serviceCollection = new ServiceCollection();
+
+        // Act
+        serviceCollection.AddStartups(configuration);
+
+        // Assert
+        Assert.True(StartupFake.Initialized);
+    }
 
 }

packages/CodeDesignPlus.Net.Core/tests/CodeDesignPlus.Net.Core.Test/Helpers/StartupFake.cs

@@ -0,0 +1,13 @@
+using System;
+
+namespace CodeDesignPlus.Net.Core.Test.Helpers;
+
+public class StartupFake: IStartup
+{
+    public static bool Initialized { get; private set; }
+
+    public void Initialize(IServiceCollection services, IConfiguration configuration)
+    {
+        Initialized = true;
+    }
+}