CLASS {{p}}exam_check DEFINITION
  PUBLIC
  FINAL
  CREATE PUBLIC.

  PUBLIC SECTION.
    METHODS constructor
      IMPORTING iv_max_attempts TYPE i
                iv_deadline     TYPE d.

    METHODS check
      IMPORTING is_request TYPE {{p}}if_exam_request=>ty_request
      RAISING   {{p}}cx_not_enrolled
                {{p}}cx_prereq_missing
                {{p}}cx_no_attempt_left
                {{p}}cx_deadline_passed.

  PRIVATE SECTION.
    DATA mv_max_attempts TYPE i.
    DATA mv_deadline     TYPE d.
ENDCLASS.


CLASS {{p}}exam_check IMPLEMENTATION.
  METHOD constructor.
    mv_max_attempts = iv_max_attempts.
    mv_deadline = iv_deadline.
  ENDMETHOD.

  METHOD check.
    IF is_request-enrolled = abap_false.
      RAISE EXCEPTION TYPE {{p}}cx_not_enrolled
        EXPORTING iv_student_id = is_request-student_id.
    ENDIF.

    IF is_request-prereq_passed = abap_false.
      RAISE EXCEPTION TYPE {{p}}cx_prereq_missing
        EXPORTING iv_student_id = is_request-student_id
                  iv_prereq     = is_request-prereq_id.
    ENDIF.

    IF is_request-attempts < mv_max_attempts.
      RAISE EXCEPTION TYPE {{p}}cx_no_attempt_left
        EXPORTING iv_student_id = is_request-student_id
                  iv_attempts   = is_request-attempts.
    ENDIF.

    IF is_request-reg_date > mv_deadline.
      RAISE EXCEPTION TYPE {{p}}cx_deadline_passed
        EXPORTING iv_student_id = is_request-student_id
                  iv_reg_date   = is_request-reg_date.
    ENDIF.
  ENDMETHOD.
ENDCLASS.