CLASS zcl_abapgit_default_transport DEFINITION
  PUBLIC
  CREATE PUBLIC .

  PUBLIC SECTION.
    INTERFACES zif_abapgit_default_transport.

    METHODS
      constructor
        RAISING
          zcx_abapgit_exception.

  PROTECTED SECTION.
  PRIVATE SECTION.
    DATA mv_is_set_by_abapgit TYPE abap_bool .
    DATA ms_save TYPE e070use .

    METHODS store
      RAISING
        zcx_abapgit_exception .
    METHODS restore
      RAISING
        zcx_abapgit_exception .
    METHODS set_internal
      IMPORTING
        !iv_transport TYPE trkorr
      RAISING
        zcx_abapgit_exception .
    METHODS clear
      IMPORTING
        !is_default_task TYPE e070use
      RAISING
        zcx_abapgit_exception .
ENDCLASS.



CLASS ZCL_ABAPGIT_DEFAULT_TRANSPORT IMPLEMENTATION.


  METHOD clear.

    CALL FUNCTION 'TR_TASK_RESET'
      EXPORTING
        iv_username      = is_default_task-username
        iv_order         = is_default_task-ordernum
        iv_task          = is_default_task-tasknum
        iv_dialog        = abap_false
      EXCEPTIONS
        invalid_username = 1
        invalid_order    = 2
        invalid_task     = 3
        OTHERS           = 4.
    IF sy-subrc <> 0.
      zcx_abapgit_exception=>raise_t100( ).
    ENDIF.

  ENDMETHOD.


  METHOD constructor.

    store( ).

  ENDMETHOD.


  METHOD restore.

    IF ms_save IS INITIAL.
      " There wasn't a default transport request before
      " so we needn't restore anything.
      RETURN.
    ENDIF.

    CALL FUNCTION 'TR_TASK_SET'
      EXPORTING
        iv_order          = ms_save-ordernum
        iv_task           = ms_save-tasknum
      EXCEPTIONS
        invalid_username  = 1
        invalid_category  = 2
        invalid_client    = 3
        invalid_validdays = 4
        invalid_order     = 5
        invalid_task      = 6
        OTHERS            = 7.
    IF sy-subrc <> 0.
      zcx_abapgit_exception=>raise_t100( ).
    ENDIF.

  ENDMETHOD.


  METHOD set_internal.

    CALL FUNCTION 'TR_TASK_SET'
      EXPORTING
        iv_order          = iv_transport
        iv_validdays      = 1
      EXCEPTIONS
        invalid_username  = 1
        invalid_category  = 2
        invalid_client    = 3
        invalid_validdays = 4
        invalid_order     = 5
        invalid_task      = 6
        OTHERS            = 7.

    IF sy-subrc <> 0.
      zcx_abapgit_exception=>raise_t100( ).
    ENDIF.

  ENDMETHOD.


  METHOD store.

    ms_save = zif_abapgit_default_transport~get( ).

  ENDMETHOD.


  METHOD zif_abapgit_default_transport~get.

    DATA lt_e070use TYPE STANDARD TABLE OF e070use WITH DEFAULT KEY.
    DATA ls_line    LIKE LINE OF lt_e070use.

    CALL FUNCTION 'TR_TASK_GET'
      TABLES
        tt_e070use       = lt_e070use
      EXCEPTIONS
        invalid_username = 1
        invalid_category = 2
        invalid_client   = 3
        OTHERS           = 4.
    IF sy-subrc <> 0.
      zcx_abapgit_exception=>raise_t100( ).
    ENDIF.

    READ TABLE lt_e070use INTO ls_line INDEX 1.
    IF sy-subrc = 0.
      MOVE-CORRESPONDING ls_line TO rs_default_task.
    ENDIF.

  ENDMETHOD.


  METHOD zif_abapgit_default_transport~reset.

    DATA: ls_default_task TYPE e070use.

    IF mv_is_set_by_abapgit = abap_false.
      " if the default transport request task isn't set
      " by us there is nothing to do.
      RETURN.
    ENDIF.

    CLEAR mv_is_set_by_abapgit.

    ls_default_task = zif_abapgit_default_transport~get( ).

    IF ls_default_task IS NOT INITIAL.

      clear( ls_default_task ).

    ENDIF.

    restore( ).

  ENDMETHOD.


  METHOD zif_abapgit_default_transport~set.

    " checks whether object changes of the package are rerorded in transport
    " requests. If true then we set the default task, so that no annoying
    " transport request popups are shown while deserializing.

    IF mv_is_set_by_abapgit = abap_true.
      " the default transport request task is already set by us
      " -> no reason to do it again.
      RETURN.
    ENDIF.

    IF iv_transport IS INITIAL.
      zcx_abapgit_exception=>raise( |No transport request was supplied| ).
    ENDIF.

    set_internal( iv_transport ).

    mv_is_set_by_abapgit = abap_true.

  ENDMETHOD.
ENDCLASS.