MafiaTelegramBot/MafiaTelegramBot/DataBase/Entity/UserEntity.cs

using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using System.Threading.Tasks;
using MafiaTelegramBot.DataBase.EntityDao;

namespace MafiaTelegramBot.DataBase.Entity
{
    [Table("users")]
    public class UserEntity
    {
        [Key]
        [DatabaseGenerated(DatabaseGeneratedOption.None)]
        [Column("id")] public long Id { get; init; }
        [Column("chat_id")] public long ChatId { get; init; }
        
        [NotMapped] private string _username = "\\[NoUsername\\]";
        [Column("username")] public string Username
        {
            get => _username;
            set
            {
                var buff = _username;
                _username = value;
                if (buff != value && buff != "\\[NoUsername\\]") Task.Run(async () => await UserDao.Update(this));
            }
        }

        [Column("nickname")] public string NickName { get; set; } = "\\[NoNickname\\]";

        public async Task UpdateNickName(string newName)
        {
            var buff = NickName;
            NickName = newName;
            if (buff != newName && buff != "\\[NoNickname\\]")
                await UserDao.Update(this);
        }
    }
}