INTERFACE {{p}}if_tour_planner PUBLIC.
  TYPES ty_status TYPE c LENGTH 10.

  CONSTANTS:
    BEGIN OF c_status,
      ok        TYPE ty_status VALUE 'OK',
      invalid   TYPE ty_status VALUE 'INVALID',
      duplicate TYPE ty_status VALUE 'DUPLICATE',
    END OF c_status.

  TYPES:
    BEGIN OF ty_item,
      tour_id  TYPE c LENGTH 4,
      stop_no  TYPE i,
      customer TYPE c LENGTH 10,
      packages TYPE i,
      weight   TYPE p LENGTH 8 DECIMALS 2,
    END OF ty_item,
    tt_item TYPE STANDARD TABLE OF ty_item WITH EMPTY KEY,

    BEGIN OF ty_tour,
      tour_id  TYPE c LENGTH 4,
      stops    TYPE i,
      packages TYPE i,
      weight   TYPE p LENGTH 8 DECIMALS 2,
    END OF ty_tour,
    tt_tour TYPE STANDARD TABLE OF ty_tour WITH EMPTY KEY.

  METHODS add_item
    IMPORTING iv_tour_id       TYPE c LENGTH 4
              iv_stop_no       TYPE i
              iv_customer      TYPE c LENGTH 10
              iv_packages      TYPE i
              iv_weight        TYPE p LENGTH 8 DECIMALS 2
    RETURNING VALUE(rv_status) TYPE ty_status.

  METHODS remove_tour
    IMPORTING iv_tour_id      TYPE c LENGTH 4
    RETURNING VALUE(rv_count) TYPE i.

  METHODS items
    RETURNING VALUE(rt_item) TYPE tt_item.

  METHODS stops_of_tour
    IMPORTING iv_tour_id     TYPE c LENGTH 4
    RETURNING VALUE(rt_item) TYPE tt_item.

  METHODS find_stop
    IMPORTING iv_tour_id     TYPE c LENGTH 4
              iv_stop_no     TYPE i
    RETURNING VALUE(rs_item) TYPE ty_item.

  METHODS tour_summary
    RETURNING VALUE(rt_tour) TYPE tt_tour.
ENDINTERFACE.