public function profileUpdate($studentAem, Request $request)
    {
        $student = Student::aem($studentAem)->first();
        if ($student == null)
            abort('404', 'studentProfileUpdateNotFoundException');
        $student->firstname = $request["firstname"];
        $student->lastname = $request["lastname"];
        $student->father_name = $request["father_name"];
        $student->semester = $request["semester"];
        $student->department_id = $request["department"];
        if ($request->file('photo') != null && $request->file('photo')->isValid()) {
            $extension = $request->photo->extension();
            if (in_array($extension, array('jpg', 'jpeg', 'png'))) {
                $student->photo = md5($student->id) . '.' . $extension;
                $request->photo->storeAs('public/studentProfiles', md5($student->id) . '.' . $extension);
                $student->save();
                return view('dashboard.student.profile', compact('student'));
            } else {
                return abort('403', 'studentProfileUpdateIllegalFileExtension');
            }
        } else {
            $student->save();
            return view('dashboard.student.profile', compact('student'));
        }
    }