feat(Konstanten): Erzeugen von Optionen aus Appsettings über IOptions.

- Konstantenmodell mit UserLanguages String-Array erstellen. Hinzufügen einer benutzerdefinierten Methode zum Abrufen der Eigenschaft über Name.
- imlement in appsettings und confgire in Program.cs

DigitalData.UserManager.API/Controllers/ConstantsController.cs

@@ -0,0 +1,27 @@
+using DigitalData.UserManager.API.Models;
+using Microsoft.AspNetCore.Mvc;
+using Microsoft.Extensions.Options;
+
+namespace DigitalData.UserManager.API.Controllers
+{
+    [Route("api/[controller]")]
+    [ApiController]
+    public class ConstantsController : ControllerBase
+    {
+        private readonly Constants _constants;
+        public ConstantsController(IOptions<Constants> constantsOptions)
+        {
+            _constants = constantsOptions.Value;
+        }
+
+        [HttpGet]
+        public IActionResult GetConstant(string? name = null)
+        {
+            if(name is null)
+                return Ok(_constants);
+
+
+            return Ok(_constants[name]);
+        }
+    }
+}

DigitalData.UserManager.API/Models/Constants.cs

@@ -0,0 +1,13 @@
+using System.Reflection;
+
+namespace DigitalData.UserManager.API.Models
+{
+    public class Constants
+    {
+        public IEnumerable<string> UserLanguages { get; init; } = Array.Empty<string>();
+
+        public object? this[string propertyName] => GetType()
+            .GetProperty(propertyName, BindingFlags.IgnoreCase | BindingFlags.Public | BindingFlags.Instance)?
+            .GetValue(this, null);
+    }
+}

DigitalData.UserManager.API/Program.cs

@@ -9,6 +9,8 @@ using DigitalData.Core.API;
 using DigitalData.UserManager.API.Controllers;
 using DigitalData.UserManager.Application.Services;
 using Microsoft.Data.SqlClient;
+using System.Reflection.Metadata;
+using DigitalData.UserManager.API.Models;
 
 var logger = LogManager.Setup().LoadConfigurationFromAppSettings().GetCurrentClassLogger();
 logger.Debug("init main");
@@ -77,7 +79,9 @@ try {
     builder.Services.AddDirectorySearchService();
 
     builder.Services.AddCookieBasedLocalizer();
-    
+
+    builder.ConfigureBySection<Constants>();
+
     var app = builder.Build();
 
     cnn_str = new(() =>

DigitalData.UserManager.API/appsettings.json

@@ -73,5 +73,11 @@
   },
   // Delete below in production
   "UseEncryptor": true,
-  "UseSwagger": true
+  "UseSwagger": true,
+  "Constants": {
+    "UserLanguages": [
+      "de-DE",
+      "en-US"
+    ]
+  }
 }