CustomPrivileges.cs

using System;
 
namespace Waher.Security.Authorization
{
    public class CustomPrivileges<T> : IAuthorization<T>
    {
        private readonly Func<T, string[]> calculatePrivileges;
        public CustomPrivileges(Func<T, string[]> CalculatePrivileges)
        {
            if (CalculatePrivileges is null)
                throw new ArgumentNullException(nameof(CalculatePrivileges));
 
            this.calculatePrivileges = CalculatePrivileges;
        }
 
        public bool IsAuthorized(T Resource, IHasPrivileges User)
        {
            string[] Privileges = this.calculatePrivileges(Resource);
            int i, c = Privileges.Length;
 
            for (i = 0; i < c; i++)
            {
                if (!User.HasPrivilege(Privileges[i]))
                    return false;
            }
 
            return true;
        }
    }
}