abap-sdk/ZGOOG_SDK_QUICKSTART/zr_qs_gmail_get_attachments.prog.abap

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*  Copyright 2023 Google LLC                                         *
*                                                                    *
*  Licensed under the Apache License, Version 2.0 (the "License");   *
*  you may not use this file except in compliance with the License.  *
*  You may obtain a copy of the License at                           *
*      https://www.apache.org/licenses/LICENSE-2.0                   *
*  Unless required by applicable law or agreed to in writing,        *
*  software distributed under the License is distributed on an       *
*  "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,      *
*  either express or implied.                                        *
*  See the License for the specific language governing permissions   *
*  and limitations under the License.                                *
**********************************************************************
REPORT zr_qs_gmail_get_attachments.

* Data declarations
DATA:
  lt_message_parts TYPE /goog/cl_gmail_v1=>ty_t_038,
  lv_p_id          TYPE string,
  lv_p_user_id     TYPE string.

FIELD-SYMBOLS:
               <lt_message_parts> TYPE data.

TRY.
* Open HTTP Connection
    DATA(lo_client) = NEW /goog/cl_gmail_v1( iv_key_name = 'TEST_GMAIL' ).

* Populate relevant parameters
    lv_p_id = '<Message ID>'. "Pass the email Message ID here
    lv_p_user_id = 'me'.         "Short hand to pass your Gmail ID

* Call API method: gmail.users.messages.get
    CALL METHOD lo_client->get_messages
      EXPORTING
        iv_p_id      = lv_p_id
        iv_p_user_id = lv_p_user_id
      IMPORTING
        es_output    = DATA(ls_output)
        ev_ret_code  = DATA(lv_ret_code)
        ev_err_text  = DATA(lv_err_text)
        es_err_resp  = DATA(ls_err_resp).
    IF lo_client->is_success( lv_ret_code ).
* Post processing to extract the response data reference to ABAP Type shipped with the SDK
      ASSIGN ls_output-payload-parts->* TO <lt_message_parts>.
      DATA(lv_json) = /goog/cl_json_util=>serialize_json( is_data = <lt_message_parts> ).
      /goog/cl_json_util=>deserialize_json( EXPORTING iv_json        = lv_json
                                                      iv_pretty_name = /ui2/cl_json=>pretty_mode-extended
                                            IMPORTING es_data        = lt_message_parts ).
* Iterate internal table to browse through the message parts which have attachments
      LOOP AT lt_message_parts ASSIGNING FIELD-SYMBOL(<ls_message_part>) WHERE filename IS NOT INITIAL.
* Call API method: gmail.users.messages.attachments.get
        CALL METHOD lo_client->get_attachments
          EXPORTING
            iv_p_id         = <ls_message_part>-body-attachment_id
            iv_p_message_id = lv_p_id
            iv_p_user_id    = lv_p_user_id
          IMPORTING
            es_output       = DATA(ls_output_attachment)
            ev_ret_code     = lv_ret_code
            ev_err_text     = lv_err_text
            es_err_resp     = ls_err_resp.
        IF lo_client->is_success( lv_ret_code ).
* Display the returned file content in Base64 encoded format
          cl_demo_output=>display( ls_output_attachment ).
        ELSE.
          MESSAGE lv_err_text TYPE 'E'.

        ENDIF.

      ENDLOOP.
    ELSE.
      MESSAGE lv_err_text TYPE 'E'.

    ENDIF.

* Close HTTP Connection
    lo_client->close( ).

  CATCH /goog/cx_sdk INTO DATA(lo_exception).
    MESSAGE lo_exception->get_text( ) TYPE 'E'.

ENDTRY.