slarny4/Demo1/Domain/UseCase/PresenceUseCase.cs

// C:\Users\class_Student\source\repos\slarny4\Demo1\Domain\UseCase\PresenceUseCase.cs
using System;
using System.Collections.Generic;
using Demo.Data.LocalData.Entity;
using Demo.Data.Repository;

namespace Demo.Domain.UseCase
{
    public class PresenceUseCase
    {
        private readonly IPresenceRepository _presenceRepository;
        private readonly IGroupRepository _groupRepository;
        private readonly IUserRepository _userRepository;

        public PresenceUseCase(IPresenceRepository presenceRepository, IGroupRepository groupRepository, IUserRepository userRepository)
        {
            _presenceRepository = presenceRepository;
            _groupRepository = groupRepository;
            _userRepository = userRepository;
        }

        public IEnumerable<LocalPresence> GetPresencesByGroupAndDate(int groupId, DateTime date)
        {
            return _presenceRepository.GetPresencesByGroupAndDate(groupId, date);
        }

        public void MarkUserAbsent(Guid userId, int lessonNumber, DateTime date)
        {
            var presence = _presenceRepository.GetAllPresences();
            foreach (var p in presence)
            {
                if (p.UserId == userId && p.ClassDate.Date == date.Date && p.LessonNumber == lessonNumber)
                {
                    p.WasPresent = false;
                    _presenceRepository.UpdatePresence(p);
                }
            }
        }

        public IEnumerable<LocalPresence> GetAllPresences()
        {
            return _presenceRepository.GetAllPresences();
        }
    }
}