MafiaTelegramBot/MafiaTelegramBot/DataBase/UserDao.cs

using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.EntityFrameworkCore;

namespace MafiaTelegramBot.DataBase
{
    public static class UserDao
    {
        //private static readonly List<UserEntity> DataBase = new();
        private static Mafia DataBase = new Mafia();
        
        private static readonly Dictionary<long,UserEntity> ActiveUsers = new();
        public static async Task<UserEntity> GetUserById(long id)
        {
            if (ActiveUsers.ContainsKey(id)) return ActiveUsers[id];
            var user = await Task.Run(()=> DataBase.Users.First(user1 => user1.Id == id));
            ActiveUsers.Add(user.Id, user);
            return user;
        }

        private static UserEntity ConvertToUser()
        {
            return new();
        }
        
        public static async Task Update(UserEntity userEntity)
        {
            if (await DataBase.Users.AnyAsync(user => user.Id == userEntity.Id))
            {
                DataBase.Update(userEntity);
            }
            else
            {
                DataBase.Add(userEntity);
            }
            await DataBase.SaveChangesAsync();
        }

        public static async Task<bool> UserExists(long id)
        {
            if (ActiveUsers.ContainsKey(id))
                return true;
            return await DataBase.Users.AnyAsync(user => user.Id == id);
                /*
                 return await Task.Run(() =>
                {
                    return ActiveUsers.ContainsKey(id) || DataBase.Users.AnyAsync(user => user.Id == id);
                });
                */
        }
    }
}