INTERFACE {{p}}if_kart_check PUBLIC.
  TYPES ty_reason TYPE c LENGTH 12.

  TYPES:
    BEGIN OF ty_booking,
      driver_name  TYPE c LENGTH 20,
      driver_age   TYPE i,
      laps         TYPE i,
      booking_time TYPE t,
    END OF ty_booking.

  TYPES tt_bookings TYPE STANDARD TABLE OF ty_booking WITH EMPTY KEY.

  CONSTANTS:
    BEGIN OF c_reason,
      ok        TYPE ty_reason VALUE 'OK',
      no_name   TYPE ty_reason VALUE 'NO_NAME',
      too_young TYPE ty_reason VALUE 'TOO_YOUNG',
      too_old   TYPE ty_reason VALUE 'TOO_OLD',
      bad_laps  TYPE ty_reason VALUE 'BAD_LAPS',
      closed    TYPE ty_reason VALUE 'CLOSED',
      too_many  TYPE ty_reason VALUE 'TOO_MANY',
    END OF c_reason.

  CONSTANTS:
    BEGIN OF c_limit,
      min_age     TYPE i VALUE 12,
      max_age     TYPE i VALUE 75,
      min_laps    TYPE i VALUE 5,
      max_laps    TYPE i VALUE 30,
      max_drivers TYPE i VALUE 8,
    END OF c_limit.

  CONSTANTS:
    c_open_from TYPE t VALUE '090000',
    c_open_to   TYPE t VALUE '220000'.

  METHODS check_booking
    IMPORTING is_booking       TYPE ty_booking
    RETURNING VALUE(rv_reason) TYPE ty_reason.

  METHODS check_group
    IMPORTING it_bookings      TYPE tt_bookings
    RETURNING VALUE(rv_reason) TYPE ty_reason.

  METHODS is_open
    IMPORTING iv_time        TYPE t
    RETURNING VALUE(rv_open) TYPE abap_bool.
ENDINTERFACE.