tbf/Common/IUser.cs

using System;

namespace Common
{
    public interface IUser
    {
        string UserName { get; }	    /// = name, alias, abbreviation
        string FullName { get; }	    /// = description
        string Tag { get; }
        int Number { get; }

        /// Access rights
        bool IsPowerUser();
        bool IsMemberOf(GID group);
        bool IsMemberOf(GID[] groups);
        bool IsCorrectPassword(string password);

        /// Password complexity, history, etc.
        bool IsPasswordExpired();
        bool IsPasswordUsedInPast(string passwordCandidate);
        void SetPassword(string password);
    }
}