public async Task <DeleteScheduleSessionRs> Delete(int id)
{
var rs = new DeleteScheduleSessionRs();
var schedule = await _dbContext.Schedules.FirstOrDefaultAsync(s => s.Id == id);
if (schedule == null)
{
throw new Exception("Lịch học không tồn tại");
}
var userAndCountRegistrationMap = schedule.ScheduleDetails
.SelectMany(x => x.Registrations)
.Select(x => x.UserId)
.GroupBy(x => x)
.ToDictionary(x => x.Key, x => x.Count());
rs.IsUserGetSessionBack = ReturnSessionBackToRegisteredUser(userAndCountRegistrationMap);
_dbContext.Schedules.Remove(schedule);
await _dbContext.SaveChangesAsync();
rs.Success = true;
return(rs);
}
public async Task <DeleteScheduleSessionRs> DeleteSession(int scheduleDetailId)
{
var session = await _dbContext.ScheduleDetails.FirstOrDefaultAsync(x => x.Id == scheduleDetailId);
if (session == null)
{
throw new Exception("Buổi học không tồn tại!");
}
if (session.SessionNo == 1)
{
return(await this.Delete(session.ScheduleId));
}
var rs = new DeleteScheduleSessionRs();
var schedule = await _dbContext.Schedules.FirstOrDefaultAsync(s => s.Id == session.ScheduleId);
schedule.Sessions = session.SessionNo - 1;
var deletedSessions = _dbContext.ScheduleDetails
.Where(x => x.ScheduleId == session.ScheduleId && x.SessionNo >= session.SessionNo);
var userAndCountRegistrationMap = await deletedSessions
.SelectMany(x => x.Registrations)
.Select(x => x.UserId)
.GroupBy(x => x)
.ToDictionaryAsync(x => x.Key, x => x.Count());
rs.IsUserGetSessionBack = ReturnSessionBackToRegisteredUser(userAndCountRegistrationMap);
_dbContext.ScheduleDetails.RemoveRange(deletedSessions);
await _dbContext.SaveChangesAsync();
rs.Success = true;
return(rs);
}
