REPORT {{p}}bake_sales.

DATA gv_shop TYPE {{p}}deliv-shop.

PARAMETERS p_date TYPE d OBLIGATORY.
SELECT-OPTIONS s_shop FOR gv_shop.

CLASS lcl_report DEFINITION FINAL.
  PUBLIC SECTION.
    TYPES: BEGIN OF ty_raw,
             shop       TYPE {{p}}deliv-shop,
             loaves     TYPE {{p}}deliv-loaves,
             unit_price TYPE {{p}}deliv-unit_price,
           END OF ty_raw.
    TYPES tt_raw TYPE STANDARD TABLE OF ty_raw.

    TYPES: BEGIN OF ty_line,
             shop       TYPE {{p}}deliv-shop,
             loaves     TYPE i,
             revenue    TYPE {{p}}deliv-unit_price,
             deliveries TYPE i,
           END OF ty_line.
    TYPES tt_line TYPE STANDARD TABLE OF ty_line.

    METHODS aggregate
      IMPORTING it_raw   TYPE tt_raw
      CHANGING  ct_lines TYPE tt_line.

    METHODS display
      CHANGING ct_lines TYPE tt_line.
ENDCLASS.

CLASS lcl_report IMPLEMENTATION.
  METHOD aggregate.
    DATA lt_sorted TYPE tt_raw.
    DATA ls_raw TYPE ty_raw.
    DATA ls_line TYPE ty_line.

    CLEAR ct_lines.
    lt_sorted = it_raw.
    SORT lt_sorted BY shop.

    LOOP AT lt_sorted INTO ls_raw.
      AT NEW shop.
        CLEAR ls_line.
        ls_line-shop = ls_raw-shop.
      ENDAT.
      ls_line-loaves = ls_line-loaves + ls_raw-loaves.
      ls_line-revenue = ls_line-revenue + ls_raw-loaves * ls_raw-unit_price.
      ls_line-deliveries = ls_line-deliveries + 1.
      AT END OF shop.
        APPEND ls_line TO ct_lines.
      ENDAT.
    ENDLOOP.

    SORT ct_lines BY revenue DESCENDING shop ASCENDING.
  ENDMETHOD.

  METHOD display.
    DATA lo_alv TYPE REF TO cl_salv_table.
    DATA 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.

DATA go_report TYPE REF TO lcl_report.
DATA gt_raw TYPE lcl_report=>tt_raw.
DATA gt_lines TYPE lcl_report=>tt_line.

START-OF-SELECTION.
  SELECT * FROM {{p}}deliv
    WHERE deliv_date = p_date
      AND shop IN s_shop
    INTO CORRESPONDING FIELDS OF TABLE gt_raw.

  CREATE OBJECT go_report.
  go_report->aggregate( EXPORTING it_raw = gt_raw CHANGING ct_lines = gt_lines ).
  go_report->display( CHANGING ct_lines = gt_lines ).

CLASS ltc_report DEFINITION FINAL FOR TESTING DURATION SHORT RISK LEVEL HARMLESS.
  PRIVATE SECTION.
    METHODS add_raw
      IMPORTING iv_shop  TYPE {{p}}deliv-shop
                iv_loaves TYPE i
                iv_price  TYPE {{p}}deliv-unit_price
      CHANGING  ct_raw   TYPE lcl_report=>tt_raw.
    METHODS sums_one_shop FOR TESTING.
    METHODS sorts_by_revenue FOR TESTING.
    METHODS keeps_shops_apart FOR TESTING.
ENDCLASS.

CLASS ltc_report IMPLEMENTATION.
  METHOD add_raw.
    DATA ls_raw TYPE lcl_report=>ty_raw.
    ls_raw-shop = iv_shop.
    ls_raw-loaves = iv_loaves.
    ls_raw-unit_price = iv_price.
    APPEND ls_raw TO ct_raw.
  ENDMETHOD.

  METHOD sums_one_shop.
    DATA lt_raw TYPE lcl_report=>tt_raw.
    DATA lt_lines TYPE lcl_report=>tt_line.
    DATA ls_line TYPE lcl_report=>ty_line.
    DATA lo_report TYPE REF TO lcl_report.
    DATA lv_exp TYPE {{p}}deliv-unit_price.
    DATA lv_count TYPE i.

    add_raw( EXPORTING iv_shop = 'NORD' iv_loaves = 10 iv_price = '2.00'
             CHANGING ct_raw = lt_raw ).
    add_raw( EXPORTING iv_shop = 'NORD' iv_loaves = 5 iv_price = '4.00'
             CHANGING ct_raw = lt_raw ).

    CREATE OBJECT lo_report.
    lo_report->aggregate( EXPORTING it_raw = lt_raw CHANGING ct_lines = lt_lines ).

    DESCRIBE TABLE lt_lines LINES lv_count.
    cl_abap_unit_assert=>assert_equals( exp = 1 act = lv_count ).
    READ TABLE lt_lines INTO ls_line INDEX 1.
    cl_abap_unit_assert=>assert_subrc( exp = 0 ).
    cl_abap_unit_assert=>assert_equals( exp = 15 act = ls_line-loaves ).
    cl_abap_unit_assert=>assert_equals( exp = 2 act = ls_line-deliveries ).
    lv_exp = '40.00'.
    cl_abap_unit_assert=>assert_equals( exp = lv_exp act = ls_line-revenue ).
  ENDMETHOD.

  METHOD sorts_by_revenue.
    DATA lt_raw TYPE lcl_report=>tt_raw.
    DATA lt_lines TYPE lcl_report=>tt_line.
    DATA ls_line TYPE lcl_report=>ty_line.
    DATA lo_report TYPE REF TO lcl_report.
    DATA lv_exp TYPE {{p}}deliv-shop.

    add_raw( EXPORTING iv_shop = 'A' iv_loaves = 10 iv_price = '1.00'
             CHANGING ct_raw = lt_raw ).
    add_raw( EXPORTING iv_shop = 'B' iv_loaves = 10 iv_price = '9.00'
             CHANGING ct_raw = lt_raw ).

    CREATE OBJECT lo_report.
    lo_report->aggregate( EXPORTING it_raw = lt_raw CHANGING ct_lines = lt_lines ).

    READ TABLE lt_lines INTO ls_line INDEX 1.
    cl_abap_unit_assert=>assert_subrc( exp = 0 ).
    lv_exp = 'B'.
    cl_abap_unit_assert=>assert_equals( exp = lv_exp act = ls_line-shop ).
  ENDMETHOD.

  METHOD keeps_shops_apart.
    DATA lt_raw TYPE lcl_report=>tt_raw.
    DATA lt_lines TYPE lcl_report=>tt_line.
    DATA lo_report TYPE REF TO lcl_report.
    DATA lv_count TYPE i.

    add_raw( EXPORTING iv_shop = 'A' iv_loaves = 1 iv_price = '1.00'
             CHANGING ct_raw = lt_raw ).
    add_raw( EXPORTING iv_shop = 'B' iv_loaves = 1 iv_price = '1.00'
             CHANGING ct_raw = lt_raw ).

    CREATE OBJECT lo_report.
    lo_report->aggregate( EXPORTING it_raw = lt_raw CHANGING ct_lines = lt_lines ).

    DESCRIBE TABLE lt_lines LINES lv_count.
    cl_abap_unit_assert=>assert_equals( exp = 2 act = lv_count ).
  ENDMETHOD.
ENDCLASS.