def set_student_attended(request):
    try:
        training_id = int(request.POST.get("training_id"))
        student_id = int(request.POST.get("student_id"))
        yn = request.POST.get("yn", False)

        training = PepRegTraining.objects.get(id=training_id)
        try:
            student = PepRegStudent.objects.get(training_id=training_id, student_id=student_id)
        except:
            student = PepRegStudent()
            student.user_create = request.user
            student.date_create = datetime.now(UTC)
            student.training = training
            student.student = request.user

        student.user_modify = request.user
        student.date_modify = datetime.now(UTC)
       
        if yn == "true":
            student.student_status = "Attended"
            if not training.allow_validation:
                student.student_credit = training.credits
            student.save()
        else:
            if training.allow_registration:
                student.student_status = "Registered"
                student.student_credit = 0
                student.save()
            else:
                student.delete()
                student = None

        if student:
            data = {"id": student.id,
                    "email": student.student.email,
                    "status": student.student_status,
                    "is_attended": student.student_status == "Validated" or student.student_status == "Attended",
                    "is_validated": student.student_status == "Validated",
                    "student_credit": student.student_credit,
                    "student_id": student.student_id,
                    }
        else:
            data = None
        
    except Exception as e:
        db.transaction.rollback()
        return HttpResponse(json.dumps({'success': False, 'error': '%s' % e}), content_type="application/json")

    return HttpResponse(json.dumps({'success': True, 'data': data}), content_type="application/json")
def register(request):
    try:
        join = request.POST.get("join", "false") == "true"
        training_id = request.POST.get("training_id")
        user_id = request.POST.get("user_id")
        training = PepRegTraining.objects.get(id=training_id)

        if user_id:
            student_user = User.objects.get(id=int(user_id))
        else:
            student_user = request.user

        if join:
            if reach_limit(training):
                raise Exception("Maximum number of users have registered for this training.")

            try:
                student = PepRegStudent.objects.get(training_id=training_id, student=student_user)
            except:
                student = PepRegStudent()
                student.user_create = request.user
                student.date_create = datetime.now(UTC)

            student.student = student_user
            student.student_status = "Registered"
            student.training_id = int(training_id)
            student.user_modify = request.user
            student.date_modify = datetime.now(UTC)
            student.save()

            if training.type == "pepper_course":
                cea, created = CourseEnrollmentAllowed.objects.get_or_create(email=student_user.email, course_id=training.pepper_course)
                cea.is_active = True
                cea.save()
                CourseEnrollment.enroll(student_user, training.pepper_course)
        else:
            student = PepRegStudent.objects.get(training_id=training_id, student=student_user)
            remove_student(student)
    
    except Exception as e:
        return HttpResponse(json.dumps({'success': False, 'error': '%s' % e}), content_type="application/json")

    return HttpResponse(json.dumps({'success': True}), content_type="application/json")