Changes

Infrastructure/Identity/KeycloakConfiguration.cs

@@ -1,4 +1,6 @@
-namespace Musify.Infrastructure.Identity
+using Microsoft.Extensions.Configuration;
+
+namespace Musify.Infrastructure.Identity
 {
     public class KeycloakConfiguration
     {
@@ -11,5 +13,29 @@
         public string Username { get; set; } = string.Empty;
 
         public string Password { get; set; } = string.Empty;
+
+        public static KeycloakConfiguration Load(IConfiguration configuration)
+        {
+            var keycloakConfiguration = configuration.GetSection(SectionName).Get<KeycloakConfiguration>()
+                ?? throw new InvalidOperationException($"{SectionName} configuration section not found.");
+
+            Validate(keycloakConfiguration);
+
+            return keycloakConfiguration;
+        }
+
+        static void Validate(KeycloakConfiguration configuration)
+        {
+            EnsureValue(configuration.BaseUrl, nameof(configuration.BaseUrl));
+            EnsureValue(configuration.Realm, nameof(configuration.Realm));
+            EnsureValue(configuration.Username, nameof(configuration.Username));
+            EnsureValue(configuration.Password, nameof(configuration.Password));
+        }
+
+        static void EnsureValue(string value, string name)
+        {
+            if (string.IsNullOrEmpty(value))
+                throw new InvalidOperationException($"{name} configuration value not found.");
+        }
     }
 }

Infrastructure/Identity/KeycloakDependencyInjection.cs

@@ -0,0 +1,18 @@
+using Microsoft.Extensions.Configuration;
+using Microsoft.Extensions.DependencyInjection;
+using Musify.Application.Contracts.Infrastructure;
+
+namespace Musify.Infrastructure.Identity
+{
+    public static class KeycloakDependencyInjection
+    {
+        public static void AddKeycloakAuthentication(this IServiceCollection serviceDescriptors, IConfiguration configuration)
+        {
+            var keycloakConfiguration = KeycloakConfiguration.Load(configuration);
+
+            serviceDescriptors.AddSingleton(keycloakConfiguration);
+
+            serviceDescriptors.AddScoped<IKeycloakUserClient, KeycloakIdentityService>();
+        }
+    }
+}