presence/Demo/Data/Repository/SQLPresenceRepository.cs

using Demo.Data.LocalData;
using Demo.Data.RemoteData.RemoteDataBase;
using Demo.Data.RemoteData.RemoteDataBase.DAO;
using Demo.domain.Models;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Demo.Data.Repository
{
    public class SQLPresenceRepositoryImpl : IPresenceRepository
    {
        private readonly RemoteDatabaseContext _remoteDatabaseContext;

        public SQLPresenceRepositoryImpl(RemoteDatabaseContext remoteDatabaseContext)
        {
            _remoteDatabaseContext = remoteDatabaseContext;
        }

        public List<PresenceDao> GetPresenceByDateAndGroup(DateTime date, int groupId)
        {
            return _remoteDatabaseContext.PresenceDaos.Where(p => p.Date == DateOnly.FromDateTime(date) &&
                                         _remoteDatabaseContext.Users.Any(u => u.GroupId == groupId && u.UserId == p.UserId)).ToList();
        }

        // Реализация метода для получения всех данных по группе
        public List<PresenceDao> GetPresenceByGroup(int groupId)
        {
            foreach (var user in _remoteDatabaseContext.PresenceDaos)
            {
                Console.WriteLine(user);
            }
            return _remoteDatabaseContext.PresenceDaos.Where(p => p.GroupId == groupId).ToList();
        }

        public void SavePresence(List<PresenceDao> presences)
        {
            foreach (var presence in presences)
            {
                var existingPresence = _remoteDatabaseContext.PresenceDaos.FirstOrDefault(p =>
                    p.UserId == presence.UserId && 
                    p.Date == presence.Date &&
                    p.LessonNumber == presence.LessonNumber);

                if (existingPresence == null)
                {
                    _remoteDatabaseContext.PresenceDaos.Add(presence);
                }
                else
                {
                    existingPresence.IsAttedance = presence.IsAttedance;
                }
            }
        }
    }
}