feat: remove dependency to Identity.Web

src/Intility.Authorization.Azure.GuestPolicies/Intility.Authorization.Azure.GuestPolicies.csproj

@@ -23,7 +23,6 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.Identity.Web" Version="2.15.3" />
     <PackageReference Include="Microsoft.AspNetCore.Authorization" Version="8.0.0" />
   </ItemGroup>
 

src/Intility.Authorization.Azure.GuestPolicies/Policy/DenyGuestsExtensions.cs

@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.DependencyInjection.Extensions;
+using System.Security.Claims;
 
 namespace Intility.Authorization.Azure.GuestPolicies;
 
@@ -16,8 +17,6 @@ public static class DenyGuestsExtensions
     /// <returns>Services.</returns>
     public static IServiceCollection AddDenyGuestsAuthorization(this IServiceCollection services)
     {
-        services.AddAuthorization();
-
         services.TryAddEnumerable(ServiceDescriptor.Singleton<IAuthorizationHandler, DenyGuestsAuthorizationsHandler>());
 
         return services;
@@ -36,4 +35,17 @@ public static AuthorizationPolicyBuilder DenyGuests(this AuthorizationPolicyBuil
 
         return authorizationPolicyBuilder;
     }
+
+    /// <summary>
+    /// Returns the value for the first claim of the specified type, otherwise null if the claim is not present.
+    /// </summary>
+    /// <param name="principal">The <see cref="ClaimsPrincipal"/> instance this method extends.</param>
+    /// <param name="claimType">The claim type whose first value should be returned.</param>
+    /// <returns>The value of the first instance of the specified claim type, or null if the claim is not present.</returns>
+    internal static string? FindFirstValue(this ClaimsPrincipal principal, string claimType)
+    {
+        ArgumentNullException.ThrowIfNull(principal);
+        var claim = principal.FindFirst(claimType);
+        return claim?.Value;
+    }
 }