public PageModel(Entities.Lecture lecture, Entities.User user, CommitInfo commitInfo, string current_page_path, string branch, System.Dynamic.ExpandoObject viewBag)
{
this.lecture = lecture;
Lecture = new Lecture(lecture);
CommitInfo = commitInfo;
CurrentPagePath = current_page_path;
Branch = branch;
ViewBag = viewBag;
User = new User(user, user.IsTeacher(lecture) ? Role.Teacher : Role.Studnet);
Teachers = lecture.GetTeachers().Where(x => x.IsTeacher(lecture)).Select(x => new User(x, Role.Teacher));
Students = lecture.GetTeachers().Where(x => x.IsStudent(lecture)).Select(x => new User(x, Role.Studnet));
}