Make REST UserGroups by ID use Projectable

src/Tgstation.Server.Host/Controllers/Transformers/UserGroupResponseTransformer.cs

@@ -0,0 +1,37 @@
+using System.Collections.Generic;
+
+using Tgstation.Server.Api.Models;
+using Tgstation.Server.Api.Models.Response;
+
+namespace Tgstation.Server.Host.Controllers.Transformers
+{
+	/// <summary>
+	/// <see cref="Models.ITransformer{TInput, TOutput}"/> for <see cref="Models.UserGroup"/>s to <see cref="UserGroupResponse"/>s.
+	/// </summary>
+	sealed class UserGroupResponseTransformer : Models.TransformerBase<Models.UserGroup, UserGroupResponse>
+	{
+		/// <summary>
+		/// Initializes a new instance of the <see cref="UserGroupResponseTransformer"/> class.
+		/// </summary>
+		public UserGroupResponseTransformer()
+			: base(
+				  BuildSubProjection<
+					  Models.PermissionSet,
+					  IEnumerable<Models.User>,
+					  PermissionSet,
+					  List<UserName>,
+					  PermissionSetTransformer,
+					  Models.CollectionTransformer<Models.User, UserName, UserNameTransformer>>(
+					  (model, permissionSet, users) => new UserGroupResponse
+					  {
+						  Id = model.Id,
+						  Name = model.Name,
+						  PermissionSet = permissionSet,
+						  Users = users,
+					  },
+					  model => model.PermissionSet,
+					  model => model.Users))
+		{
+		}
+	}
+}

src/Tgstation.Server.Host/Controllers/UserGroupController.cs

@@ -13,6 +13,7 @@ using Tgstation.Server.Api.Models.Request;
 using Tgstation.Server.Api.Models.Response;
 using Tgstation.Server.Host.Authority;
 using Tgstation.Server.Host.Controllers.Results;
+using Tgstation.Server.Host.Controllers.Transformers;
 using Tgstation.Server.Host.Database;
 using Tgstation.Server.Host.Models;
 using Tgstation.Server.Host.Security;
@@ -129,7 +130,9 @@ namespace Tgstation.Server.Host.Controllers
 		[ProducesResponseType(typeof(UserGroupResponse), 200)]
 		[ProducesResponseType(typeof(ErrorMessageResponse), 410)]
 		public ValueTask<IActionResult> GetId(long id, CancellationToken cancellationToken)
-			=> userGroupAuthority.InvokeTransformable<UserGroup, UserGroupResponse>(this, authority => authority.GetId(id, true, cancellationToken));
+			=> userGroupAuthority.InvokeTransformable<UserGroup, UserGroupResponse, UserGroupResponseTransformer>(
+				this,
+				authority => authority.GetId<UserGroupResponse>(id, cancellationToken));
 
 		/// <summary>
 		/// Lists all <see cref="UserGroup"/>s.