Add group support to partial permissions

back/src/Kyoo.Abstractions/Models/Attributes/Permission/PartialPermissionAttribute.cs

@@ -42,7 +42,7 @@ namespace Kyoo.Abstractions.Models.Permissions
 		/// <summary>
 		/// The group of this permission.
 		/// </summary>
-		public Group? Group { get; set; }
+		public Group Group { get; set; }
 
 		/// <summary>
 		/// Ask a permission to run an action.

back/src/Kyoo.Abstractions/Models/Attributes/Permission/PermissionAttribute.cs

@@ -54,6 +54,11 @@ namespace Kyoo.Abstractions.Models.Permissions
 	/// </summary>
 	public enum Group
 	{
+		/// <summary>
+		/// Default group indicating no value.
+		/// </summary>
+		None,
+
 		/// <summary>
 		/// Allow all operations on basic items types.
 		/// </summary>

back/src/Kyoo.Authentication/Controllers/PermissionValidator.cs

@@ -93,7 +93,7 @@ namespace Kyoo.Authentication
 			/// <summary>
 			/// The group of he permission.
 			/// </summary>
-			private readonly Group _group = Group.Overall;
+			private Group _group;
 
 			/// <summary>
 			/// The permissions options to retrieve default permissions.
@@ -146,7 +146,7 @@ namespace Kyoo.Authentication
 						);
 				}
 
-				if (group != null)
+				if (group is not null and not Group.None)
 					_group = group.Value;
 				_options = options;
 			}
@@ -159,6 +159,16 @@ namespace Kyoo.Authentication
 
 				if (permission == null || kind == null)
 				{
+					if (
+						context.HttpContext.Items["PermissionGroup"]
+						is Group group and not Group.None
+					)
+						_group = group;
+					else if (_group == Group.None)
+						_group = Group.Overall;
+					else
+						context.HttpContext.Items["PermissionGroup"] = _group;
+
 					switch (context.HttpContext.Items["PermissionType"])
 					{
 						case string perm: