CustomPrivilege.cs

using System;
 
namespace Waher.Security.Authorization
{
    public class CustomPrivilege<T> : IAuthorization<T>
    {
        private readonly Func<T, string> calculatePrivilege;
        public CustomPrivilege(Func<T, string> CalculatePrivilege)
        {
            if (CalculatePrivilege is null)
                throw new ArgumentNullException(nameof(CalculatePrivilege));
 
            this.calculatePrivilege = CalculatePrivilege;
        }
 
        public bool IsAuthorized(T Resource, IHasPrivileges User)
        {
            string Privilege = this.calculatePrivilege(Resource);
            return User.HasPrivilege(Privilege);
        }
    }
}