[ABAP] PDFs mittels Klasse CL_RSPO_PDF_MERGE zusammenfügen (mergen)

* benötigt KEIN ADS (Adobe Document Service)
TRY.
    DATA: lv_rc TYPE i.
    DATA: it_files TYPE filetable.
    DATA: lv_action TYPE i.

* FileOpen-Dialog aufrufen
    cl_gui_frontend_services=>file_open_dialog( EXPORTING
                                                  file_filter    = |pdf (*.pdf)\|*.pdf\|{ cl_gui_frontend_services=>filetype_all }|
                                                  multiselection = abap_true
                                                CHANGING
                                                  file_table  = it_files
                                                  rc          = lv_rc
                                                  user_action = lv_action ).

    IF lv_action = cl_gui_frontend_services=>action_ok.
* wenn mind. zwei Dateien ausgewählt worden sind
      IF lines( it_files ) > 1.
* PDF-Merge Objekt
        DATA(o_pdf_merger) = NEW cl_rspo_pdf_merge( ).

* Dateiliste durchgehen
        LOOP AT it_files ASSIGNING FIELD-SYMBOL(<f>).

          DATA(lv_filesize) = CONV w3param-cont_len( '0' ).
          DATA(it_bin_data) = VALUE w3mimetabtype( ).

* Datei auf Appl. Server hochladen (binary)
          cl_gui_frontend_services=>gui_upload( EXPORTING
                                                  filename   = |{ it_files[ sy-tabix ]-filename }|
                                                  filetype   = 'BIN'
                                                IMPORTING
                                                  filelength = lv_filesize
                                                CHANGING
                                                  data_tab   = it_bin_data ).

* solix -> xstring
          DATA(lv_bin_data) = cl_bcs_convert=>solix_to_xstring( it_solix = it_bin_data ).

* Binärdaten der PDF-Datei als xstring zum Merger-Objekt hinzufügen
          o_pdf_merger->add_document( lv_bin_data ).

          WRITE: / |Hinzugefügt: { it_files[ sy-tabix ]-filename } ({ lv_filesize } Bytes)|.
        ENDLOOP.

* PDF-Dokumente mergen
        o_pdf_merger->merge_documents( IMPORTING merged_document = DATA(lv_merged_pdf)
                                                 rc              = lv_rc ).

        IF lv_rc = 0.
          DATA: lv_filename TYPE string.
          DATA: lv_fullpath TYPE string.
          DATA: lv_path TYPE string.

* SaveDialog
          cl_gui_frontend_services=>file_save_dialog( EXPORTING
                                                        default_extension   = 'pdf'
                                                        default_file_name   = 'merged.pdf'
                                                        file_filter         = |pdf (*.pdf)\|*.pdf\|{ cl_gui_frontend_services=>filetype_all }|
                                                        prompt_on_overwrite = abap_true
                                                      CHANGING
                                                        filename          = lv_filename     " Dateiname
                                                        path              = lv_path         " Pfad
                                                        fullpath          = lv_fullpath     " Pfad + Dateiname
                                                        user_action       = lv_action ).    " Benutzeraktion

          IF lv_action EQ cl_gui_frontend_services=>action_ok.
* xstring -> solix
            DATA(it_bin_data_merged) = cl_bcs_convert=>xstring_to_solix( lv_merged_pdf ).

            DATA(lv_size_merged) = xstrlen( lv_merged_pdf ).

* Datei lokal speichern
            cl_gui_frontend_services=>gui_download( EXPORTING
                                                      filename                = lv_fullpath
                                                      filetype                = 'BIN'
                                                      bin_filesize            = lv_size_merged
                                                    CHANGING
                                                      data_tab                = it_bin_data_merged ).

            WRITE: / |Gespeichert: { lv_fullpath } ({ lv_size_merged } Bytes)|.

          ENDIF.
        ENDIF.
      ENDIF.
    ENDIF.
  CATCH cx_root INTO DATA(e_txt).
    WRITE: / e_txt->get_text( ).
ENDTRY.