REPORT {{p}}print_sum.

DATA gv_customer TYPE {{p}}prtjob-customer.

PARAMETERS p_from TYPE d OBLIGATORY.
SELECT-OPTIONS s_cust FOR gv_customer.

CLASS lcl_report DEFINITION FINAL.
  PUBLIC SECTION.
    TYPES:
      BEGIN OF ty_job,
        customer TYPE {{p}}prtjob-customer,
        sheets   TYPE {{p}}prtjob-sheets,
        amount   TYPE {{p}}prtjob-amount,
      END OF ty_job,
      tt_job TYPE STANDARD TABLE OF ty_job,
      BEGIN OF ty_line,
        customer TYPE {{p}}prtjob-customer,
        jobs     TYPE i,
        sheets   TYPE {{p}}prtjob-sheets,
        revenue  TYPE {{p}}prtjob-amount,
      END OF ty_line,
      tt_line     TYPE STANDARD TABLE OF ty_line,
      tt_customer TYPE RANGE OF {{p}}prtjob-customer.
    METHODS read_jobs
      IMPORTING iv_from     TYPE d
                it_customer TYPE tt_customer
      CHANGING  ct_jobs     TYPE tt_job.
    METHODS aggregate
      IMPORTING it_jobs  TYPE tt_job
      CHANGING  ct_lines TYPE tt_line.
    METHODS display
      CHANGING ct_lines TYPE tt_line.
ENDCLASS.

CLASS lcl_report IMPLEMENTATION.
  METHOD read_jobs.
    SELECT customer sheets amount
      INTO CORRESPONDING FIELDS OF TABLE ct_jobs
      FROM {{p}}prtjob
      WHERE job_date >= iv_from
        OR customer IN it_customer.
  ENDMETHOD.

  METHOD aggregate.
    FIELD-SYMBOLS <ls_job> TYPE ty_job.
    FIELD-SYMBOLS <ls_line> TYPE ty_line.

    LOOP AT it_jobs ASSIGNING <ls_job>.
      READ TABLE ct_lines ASSIGNING <ls_line>
        WITH KEY customer = <ls_job>-customer.
      IF sy-subrc <> 0.
        APPEND INITIAL LINE TO ct_lines ASSIGNING <ls_line>.
        <ls_line>-customer = <ls_job>-customer.
      ENDIF.
      <ls_line>-jobs = <ls_line>-jobs + 1.
      <ls_line>-sheets = <ls_line>-sheets + <ls_job>-sheets.
      <ls_line>-revenue = <ls_line>-revenue + <ls_job>-amount.
    ENDLOOP.

    SORT ct_lines BY revenue DESCENDING customer 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.

START-OF-SELECTION.
  DATA go_report TYPE REF TO lcl_report.
  DATA lt_jobs TYPE lcl_report=>tt_job.
  DATA lt_lines TYPE lcl_report=>tt_line.
  DATA lt_customer TYPE lcl_report=>tt_customer.

  CREATE OBJECT go_report.
  lt_customer = s_cust[].
  go_report->read_jobs(
    EXPORTING iv_from = p_from it_customer = lt_customer
    CHANGING  ct_jobs = lt_jobs ).
  go_report->aggregate(
    EXPORTING it_jobs = lt_jobs
    CHANGING  ct_lines = lt_lines ).
  go_report->display( CHANGING ct_lines = lt_lines ).

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

CLASS ltc_report IMPLEMENTATION.
  METHOD aggregate_jobs.
    DATA lt_jobs TYPE lcl_report=>tt_job.
    DATA ls_job TYPE lcl_report=>ty_job.
    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_count TYPE i.
    DATA lv_amount TYPE {{p}}prtjob-amount.
    DATA lv_customer TYPE {{p}}prtjob-customer.

    CLEAR ls_job.
    ls_job-customer = 'A'.
    ls_job-sheets = 10.
    ls_job-amount = 10.
    APPEND ls_job TO lt_jobs.

    CLEAR ls_job.
    ls_job-customer = 'A'.
    ls_job-sheets = 5.
    ls_job-amount = 5.
    APPEND ls_job TO lt_jobs.

    CLEAR ls_job.
    ls_job-customer = 'B'.
    ls_job-sheets = 20.
    ls_job-amount = 40.
    APPEND ls_job TO lt_jobs.

    CREATE OBJECT lo_report.
    lo_report->aggregate(
      EXPORTING it_jobs = lt_jobs
      CHANGING  ct_lines = lt_lines ).

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

    READ TABLE lt_lines INTO ls_line INDEX 1.
    lv_customer = 'B'.
    cl_abap_unit_assert=>assert_equals( exp = lv_customer act = ls_line-customer ).
    lv_amount = 40.
    cl_abap_unit_assert=>assert_equals( exp = lv_amount act = ls_line-revenue ).

    READ TABLE lt_lines INTO ls_line INDEX 2.
    cl_abap_unit_assert=>assert_equals( exp = 2 act = ls_line-jobs ).
    lv_amount = 15.
    cl_abap_unit_assert=>assert_equals( exp = lv_amount act = ls_line-revenue ).
  ENDMETHOD.
ENDCLASS.