xxxproject/Demo/Domain/UseCase/UseCaseGeneratePresence.cs

using Demo.Data.LocalData;
using Demo.domain.Models;
using System;
using System.Collections.Generic;
using System.Linq;

namespace Demo.Domain.UseCase
{
    public class UseCaseGeneratePresence
    {
        public List<Presence> GenerateDailyPresence(int startLesson, int endLesson, int groupId, DateTime currentDate)
        {
            var users = LocalStaticData.users.Where(u => u.GroupID == groupId).ToList();
            var presences = new List<Presence>();

            for (int lesson = startLesson; lesson <= endLesson; lesson++)
            {
                foreach (var user in users)
                {
                    presences.Add(new Presence
                    {
                        User = new User
                        {
                            Guid = user.Guid,
                            FIO = user.FIO,
                            Group = new Group { Id = groupId, Name = LocalStaticData.groups.First(g => g.Id == groupId).Name }
                        },
                        Date = DateOnly.FromDateTime(currentDate),
                        LessonNumber = lesson,
                        IsAttedance = true
                    });
                }
            }
            return presences;
        }

        public List<Presence> GenerateWeeklyPresence(int startLesson, int endLesson, int groupId, DateTime startDate)
        {
            var presences = new List<Presence>();

            for (int i = 0; i < 7; i++)
            {
                DateTime currentDate = startDate.AddDays(i);
                var dailyPresences = GenerateDailyPresence(startLesson, endLesson, groupId, currentDate);
                presences.AddRange(dailyPresences);
            }
            return presences;
        }
    }
}