Perepis/domain/UseCase/UseCasePresence.cs

using Data.RemoteData.DAO;
namespace Data.domain.UseCase
{
    internal class UseCasePresence
    {
        private List<PresnceDao> attendanceRecords;

        public UseCasePresence(List<PresnceDao> attendanceRecords)
        {
            this.attendanceRecords = attendanceRecords;
        }

        public List<PresnceDao> GetAttendanceByGroup(string groupNumber)
        {
            return attendanceRecords.Where(record => record.userDao.Group.GroupName == groupNumber).ToList();
        }

        public List<PresnceDao> GetAttendanceByGroupAndDate(string groupNumber, DateOnly date)
        {
            return attendanceRecords.Where(record => record.userDao.Group.GroupName == groupNumber && record.Date == date).ToList();
        }

        public void MarkUserAsAbsent(string groupNumber, int firstLesson, int lastLesson, DateOnly date)
        {
            foreach (var lesson in Enumerable.Range(firstLesson, lastLesson - firstLesson + 1))
            {
                var record = attendanceRecords.FirstOrDefault(r => r.userDao.Group.GroupName == groupNumber && r.LessonNumber == lesson && r.Date == date);
                if (record != null)
                {
                    record.IsAttendensy = false;
                }
            }
        }

        public void MarkUserAsAbsentForWeek(string groupNumber, int firstLesson, int lastLesson, DateOnly startDate)
        {
            foreach (var day in Enumerable.Range(0, 7))
            {
                var date = startDate.AddDays(day);
                MarkUserAsAbsent(groupNumber, firstLesson, lastLesson, date);
            }
        }
    }
}