public IEnumerable <GetLectureDTO> GetLectures(int userId, string role) { IEnumerable <Lecture> lectureEntites; if (role == "teacher") { lectureEntites = _repository.GetLecturesOfTeacher(userId); } else { lectureEntites = _repository.GetLectures(); } return(Mapper.Map <IEnumerable <GetLectureDTO> >(lectureEntites)); }