From a1f996b3282b116dcdcf4b54f5d505631f102486 Mon Sep 17 00:00:00 2001
From: Developer 02 <developer02@didaloghe.onmicrosoft.com>
Date: Tue, 21 Jan 2025 15:23:22 +0100
Subject: [PATCH] =?UTF-8?q?feat:=20`DependentExtensions`=20f=C3=BCr=20exte?=
 =?UTF-8?q?nsions=20mit=20Abh=C3=A4ngigkeiten=20hinzugef=C3=BCgt=20=20-=20?=
 =?UTF-8?q?Methoden=20`AddDependentExtensions`=20und=20`TryGetByRoute`=20h?=
 =?UTF-8?q?inzugef=C3=BCgt,=20um=20die=20Konfiguration=20von=20`AuthApiPar?=
 =?UTF-8?q?ams`=20und=20das=20Abrufen=20von=20Deskriptoren=20zu=20erm?=
 =?UTF-8?q?=C3=B6glichen.?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

---
 .../Config/DependentExtensions.cs             | 39 +++++++++++++++++++
 src/DigitalData.Auth.API/Program.cs           |  3 ++
 2 files changed, 42 insertions(+)
 create mode 100644 src/DigitalData.Auth.API/Config/DependentExtensions.cs

diff --git a/src/DigitalData.Auth.API/Config/DependentExtensions.cs b/src/DigitalData.Auth.API/Config/DependentExtensions.cs
new file mode 100644
index 0000000..cecc453
--- /dev/null
+++ b/src/DigitalData.Auth.API/Config/DependentExtensions.cs
@@ -0,0 +1,39 @@
+using DigitalData.Core.Abstractions.Security;
+using Microsoft.Extensions.Options;
+
+namespace DigitalData.Auth.API.Config
+{
+    public static class DependentExtensions
+    {
+        private static AuthApiParams? _authApiParams;
+
+        private static AuthApiParams AuthApiParams
+        {
+            get => _authApiParams
+                ?? throw new InvalidOperationException(
+                    $"DependentExtensions have not been added to the application or are not configured correctly. {typeof(AuthApiParams)} cannot be provided."
+                    );
+            set => _authApiParams = value;
+        }
+
+        public static IApplicationBuilder AddDependentExtensions(this IApplicationBuilder application)
+        {
+            var authApiParamOptions = application.ApplicationServices.GetRequiredService<IOptions<AuthApiParams>>();
+            _authApiParams = authApiParamOptions.Value;
+            return application;
+        }
+
+        public static bool TryGetByRoute(this IEnumerable<IAsymmetricTokenDescriptor> descriptors, string consumerRoute, out IAsymmetricTokenDescriptor descriptor)
+        {
+#pragma warning disable CS8625 // Cannot convert null literal to non-nullable reference type.
+            descriptor = null;
+#pragma warning restore CS8625 // Cannot convert null literal to non-nullable reference type.
+            if (!AuthApiParams.Consumers.TryGetByRoute(consumerRoute, out var consumer)
+                || descriptors.TryGet(AuthApiParams.Issuer, consumer.Audience, out var _descriptor))
+                return false;
+
+            descriptor = _descriptor;
+            return true;
+        }
+    }
+}
\ No newline at end of file
diff --git a/src/DigitalData.Auth.API/Program.cs b/src/DigitalData.Auth.API/Program.cs
index a9017d8..6048147 100644
--- a/src/DigitalData.Auth.API/Program.cs
+++ b/src/DigitalData.Auth.API/Program.cs
@@ -12,6 +12,7 @@ using Microsoft.IdentityModel.JsonWebTokens;
 using Microsoft.IdentityModel.Tokens;
 using Microsoft.OpenApi.Models;
 using System.Security.Claims;
+using static System.Net.Mime.MediaTypeNames;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -116,6 +117,8 @@ builder.Services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme)
 
 var app = builder.Build();
 
+app.AddDependentExtensions();
+
 issuerSigningKeyInitiator = new Lazy<SecurityKey>(() =>
 {
     var factory = app.Services.GetRequiredService<ICryptoFactory>();