public async Task <IActionResult> AddStudentToSubject(int subjectId, int studentId = -1)
{
if (_subjectService.DoesSubjectBelongsToStudent(subjectId, studentId))
{
return(RedirectToAction("IndexTeacher", new { subjectId = subjectId }));
}
if (studentId != -1)
{
// studentId checking
await _subjectService.AddStudentToSubject(subjectId, studentId);
}
Teacher teacher = await _authentication.GetCurrentTeacherAsync();
if (!_subjectService.DoesSubjectBelongsToTeacher(subjectId, teacher.Id))
{
return(RedirectToAction("IndexTeacher", new { subjectId = subjectId }));
}
Subject subject = _databaseWorker.GetSubjectById(subjectId);
IEnumerable <Student> availableStudents = await _subjectService.GetStudentsWithoutThisSubject(subject);
StudentSubjectViewModel model = new StudentSubjectViewModel {
Subject = subject, Students = availableStudents
};
return(View(model));
}