UserService/UserService.DatabaseLayer/DataModels/Node.cs

#nullable enable
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;

namespace UserService.DatabaseLayer.DataModels
{
    public class OrganizationUnit : Node
    {
        public Member? Manager { get; set; }
    }

    public class SecurityGroup : Member
    {
    }

    public class User : Member
    {
        public string? FirstName { get; set; }
        public string? LastName { get; set; }
        public bool IsActive { get; set; }

        public string FullName => $"{FirstName} {LastName}";

        public IEnumerable<UserMember> MemberOf { get; set; } = new List<UserMember>();
    }

    public class UserMember
    {
        public int MemberId { get; set; }
        public Member? Member { get; set; }

        public int UserId { get; set; }

        public User? User { get; set; }
    }

    public abstract class Member : Node
    {
        [EmailAddress]
        public string? EMail { get; set; }

        public ICollection<UserMember> Members { get; set; } = new List<UserMember>();
    }

    public abstract class Node : ICloneable
    {
        public int Id { get; set; }
        [Required] public string CommonName { get; set; } = null!;
        public string? Description { get; set; }
        public ICollection<Node> Children { get; set; } = new List<Node>();
        public Node? Parent { get; set; } //Parent
        public int? ParentId { get; set; }

        public override string ToString() => CommonName;

        public int Level => Parent?.Level + 1 ?? 0;

        /// <inheritdoc />
        public virtual object Clone() => MemberwiseClone();
    }
}