REPORT {{p}}planetarium.

TYPES: BEGIN OF ty_visit,
         show_id      TYPE {{p}}visit-show_id,
         tickets      TYPE {{p}}visit-tickets,
         ticket_price TYPE {{p}}visit-ticket_price,
       END OF ty_visit.
TYPES tt_visit TYPE STANDARD TABLE OF ty_visit.

TYPES: BEGIN OF ty_line,
         show_id TYPE {{p}}visit-show_id,
         tickets TYPE i,
         revenue TYPE p LENGTH 15 DECIMALS 2,
       END OF ty_line.
TYPES tt_line TYPE STANDARD TABLE OF ty_line.

DATA gv_show_id TYPE {{p}}visit-show_id.

PARAMETERS p_from TYPE d OBLIGATORY.
SELECT-OPTIONS s_show FOR gv_show_id.

CLASS lcl_report DEFINITION FINAL.
  PUBLIC SECTION.
    METHODS aggregate
      IMPORTING it_visits TYPE tt_visit
      CHANGING  ct_lines  TYPE tt_line.
    METHODS display
      CHANGING ct_lines TYPE tt_line.
ENDCLASS.

CLASS lcl_report IMPLEMENTATION.
  METHOD aggregate.
    DATA: ls_visit TYPE ty_visit,
          ls_line  TYPE ty_line.

    LOOP AT it_visits INTO ls_visit.
      READ TABLE ct_lines INTO ls_line WITH KEY show_id = ls_visit-show_id.
      IF sy-subrc = 0.
        ls_line-tickets = ls_line-tickets + ls_visit-tickets.
        ls_line-revenue = ls_line-revenue + ls_visit-tickets * ls_visit-ticket_price.
        MODIFY ct_lines FROM ls_line INDEX sy-tabix.
      ELSE.
        CLEAR ls_line.
        ls_line-show_id = ls_visit-show_id.
        ls_line-tickets = ls_visit-tickets.
        ls_line-revenue = ls_visit-tickets * ls_visit-ticket_price.
        APPEND ls_line TO ct_lines.
      ENDIF.
    ENDLOOP.

    SORT ct_lines BY revenue DESCENDING show_id ASCENDING.
  ENDMETHOD.

  METHOD display.
    DATA: lo_alv   TYPE REF TO cl_salv_table,
          lx_error TYPE REF TO cx_salv_msg.

    TRY.
        cl_salv_table=>factory(
          IMPORTING r_salv_table = lo_alv
          CHANGING  t_table      = ct_lines ).
        lo_alv->display( ).
      CATCH cx_salv_msg INTO lx_error.
        MESSAGE lx_error TYPE 'I' DISPLAY LIKE 'E'.
    ENDTRY.
  ENDMETHOD.
ENDCLASS.

START-OF-SELECTION.
  DATA: lt_visits TYPE tt_visit,
        lt_lines  TYPE tt_line,
        lo_report TYPE REF TO lcl_report.

  SELECT show_id tickets ticket_price
    FROM {{p}}visit
    INTO TABLE lt_visits
    WHERE visit_date >= p_from
      AND show_id IN s_show
      AND tickets <= 0.

  CREATE OBJECT lo_report.
  lo_report->aggregate( EXPORTING it_visits = lt_visits
                        CHANGING  ct_lines  = lt_lines ).
  lo_report->display( CHANGING ct_lines = lt_lines ).

CLASS ltc_report DEFINITION FINAL FOR TESTING DURATION SHORT RISK LEVEL HARMLESS.
  PRIVATE SECTION.
    METHODS sums_by_show FOR TESTING.
    METHODS sorted_by_revenue FOR TESTING.
    METHODS tie_break_by_show FOR TESTING.
ENDCLASS.

CLASS ltc_report IMPLEMENTATION.
  METHOD sums_by_show.
    DATA: lt_visits TYPE tt_visit,
          lt_lines  TYPE tt_line,
          ls_visit  TYPE ty_visit,
          ls_line   TYPE ty_line,
          lv_exp    TYPE p LENGTH 15 DECIMALS 2,
          lo_report TYPE REF TO lcl_report.

    CLEAR ls_visit.
    ls_visit-show_id = 'A'.
    ls_visit-tickets = 10.
    ls_visit-ticket_price = '12.00'.
    APPEND ls_visit TO lt_visits.

    CLEAR ls_visit.
    ls_visit-show_id = 'A'.
    ls_visit-tickets = 5.
    ls_visit-ticket_price = '12.00'.
    APPEND ls_visit TO lt_visits.

    CLEAR ls_visit.
    ls_visit-show_id = 'B'.
    ls_visit-tickets = 4.
    ls_visit-ticket_price = '15.00'.
    APPEND ls_visit TO lt_visits.

    CREATE OBJECT lo_report.
    lo_report->aggregate( EXPORTING it_visits = lt_visits
                          CHANGING  ct_lines  = lt_lines ).

    cl_abap_unit_assert=>assert_equals( exp = 2 act = lines( lt_lines ) ).

    READ TABLE lt_lines INTO ls_line INDEX 1.
    cl_abap_unit_assert=>assert_equals( exp = 'A' act = ls_line-show_id ).
    cl_abap_unit_assert=>assert_equals( exp = 15 act = ls_line-tickets ).
    lv_exp = 15 * 12.
    cl_abap_unit_assert=>assert_equals( exp = lv_exp act = ls_line-revenue ).

    READ TABLE lt_lines INTO ls_line INDEX 2.
    cl_abap_unit_assert=>assert_equals( exp = 'B' act = ls_line-show_id ).
    cl_abap_unit_assert=>assert_equals( exp = 4 act = ls_line-tickets ).
    lv_exp = 4 * 15.
    cl_abap_unit_assert=>assert_equals( exp = lv_exp act = ls_line-revenue ).
  ENDMETHOD.

  METHOD sorted_by_revenue.
    DATA: lt_visits TYPE tt_visit,
          lt_lines  TYPE tt_line,
          ls_visit  TYPE ty_visit,
          ls_line   TYPE ty_line,
          lo_report TYPE REF TO lcl_report.

    CLEAR ls_visit.
    ls_visit-show_id = 'C'.
    ls_visit-tickets = 1.
    ls_visit-ticket_price = '5.00'.
    APPEND ls_visit TO lt_visits.

    CLEAR ls_visit.
    ls_visit-show_id = 'D'.
    ls_visit-tickets = 10.
    ls_visit-ticket_price = '5.00'.
    APPEND ls_visit TO lt_visits.

    CREATE OBJECT lo_report.
    lo_report->aggregate( EXPORTING it_visits = lt_visits
                          CHANGING  ct_lines  = lt_lines ).

    READ TABLE lt_lines INTO ls_line INDEX 1.
    cl_abap_unit_assert=>assert_equals( exp = 'D' act = ls_line-show_id ).
  ENDMETHOD.

  METHOD tie_break_by_show.
    DATA: lt_visits TYPE tt_visit,
          lt_lines  TYPE tt_line,
          ls_visit  TYPE ty_visit,
          ls_line   TYPE ty_line,
          lo_report TYPE REF TO lcl_report.

    CLEAR ls_visit.
    ls_visit-show_id = 'Z'.
    ls_visit-tickets = 2.
    ls_visit-ticket_price = '5.00'.
    APPEND ls_visit TO lt_visits.

    CLEAR ls_visit.
    ls_visit-show_id = 'A'.
    ls_visit-tickets = 2.
    ls_visit-ticket_price = '5.00'.
    APPEND ls_visit TO lt_visits.

    CREATE OBJECT lo_report.
    lo_report->aggregate( EXPORTING it_visits = lt_visits
                          CHANGING  ct_lines  = lt_lines ).

    READ TABLE lt_lines INTO ls_line INDEX 1.
    cl_abap_unit_assert=>assert_equals( exp = 'A' act = ls_line-show_id ).
    READ TABLE lt_lines INTO ls_line INDEX 2.
    cl_abap_unit_assert=>assert_equals( exp = 'Z' act = ls_line-show_id ).
  ENDMETHOD.
ENDCLASS.