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FINAL
CREATE PUBLIC .
PUBLIC SECTION.
CONSTANTS c_splitter TYPE string VALUE `|`.
CONSTANTS c_root TYPE string VALUE `@`.
CLASS-METHODS serialize
IMPORTING
it_checksums TYPE zif_abapgit_persistence=>ty_local_checksum_tt
RETURNING
VALUE(rv_string) TYPE string.
CLASS-METHODS deserialize
IMPORTING
iv_string TYPE string
RETURNING
VALUE(rt_checksums) TYPE zif_abapgit_persistence=>ty_local_checksum_tt.
PROTECTED SECTION.
PRIVATE SECTION.
ENDCLASS.
CLASS lcl_checksum_serializer IMPLEMENTATION.
METHOD deserialize.
DATA lt_buf_tab TYPE string_table.
DATA lv_buf TYPE string.
DATA lt_checksums LIKE rt_checksums.
FIELD-SYMBOLS <ls_cs> LIKE LINE OF lt_checksums.
FIELD-SYMBOLS <ls_file> LIKE LINE OF <ls_cs>-files.
SPLIT iv_string AT |\n| INTO TABLE lt_buf_tab.
LOOP AT lt_buf_tab INTO lv_buf.
CHECK lv_buf IS NOT INITIAL. " In fact this is a bug ... it cannot be empty, maybe raise
IF lv_buf+0(1) = '/'.
IF <ls_cs> IS NOT ASSIGNED.
" Incorrect checksums structure, maybe raise, though it is not critical for execution
RETURN.
ENDIF.
APPEND INITIAL LINE TO <ls_cs>-files ASSIGNING <ls_file>.
SPLIT lv_buf AT c_splitter INTO <ls_file>-path <ls_file>-filename <ls_file>-sha1.
IF <ls_file>-path IS INITIAL OR <ls_file>-filename IS INITIAL OR <ls_file>-sha1 IS INITIAL.
" Incorrect checksums structure, maybe raise, though it is not critical for execution
RETURN.
ENDIF.
ELSEIF lv_buf = c_root. " Root
APPEND INITIAL LINE TO lt_checksums ASSIGNING <ls_cs>. " Empty item
ELSE.
APPEND INITIAL LINE TO lt_checksums ASSIGNING <ls_cs>.
SPLIT lv_buf AT c_splitter INTO <ls_cs>-item-obj_type <ls_cs>-item-obj_name <ls_cs>-item-devclass.
IF <ls_cs>-item-obj_type IS INITIAL OR <ls_cs>-item-obj_name IS INITIAL OR <ls_cs>-item-devclass IS INITIAL.
" Incorrect checksums structure, maybe raise, though it is not critical for execution
RETURN.
ENDIF.
ENDIF.
ENDLOOP.
rt_checksums = lt_checksums.
ENDMETHOD.
METHOD serialize.
DATA lt_buf_tab TYPE string_table.
DATA lv_buf TYPE string.
DATA lt_checksums_sorted TYPE zif_abapgit_persistence=>ty_local_checksum_by_item_tt.
FIELD-SYMBOLS <ls_cs> LIKE LINE OF it_checksums.
FIELD-SYMBOLS <ls_file> LIKE LINE OF <ls_cs>-files.
lt_checksums_sorted = it_checksums.
LOOP AT lt_checksums_sorted ASSIGNING <ls_cs>.
IF lines( <ls_cs>-files ) = 0.
CONTINUE.
ENDIF.
IF <ls_cs>-item-obj_type IS NOT INITIAL.
CONCATENATE <ls_cs>-item-obj_type <ls_cs>-item-obj_name <ls_cs>-item-devclass
INTO lv_buf
SEPARATED BY c_splitter.
ELSE.
lv_buf = c_root.
ENDIF.
APPEND lv_buf TO lt_buf_tab.
LOOP AT <ls_cs>-files ASSIGNING <ls_file>.
CONCATENATE <ls_file>-path <ls_file>-filename <ls_file>-sha1
INTO lv_buf
SEPARATED BY c_splitter.
APPEND lv_buf TO lt_buf_tab.
ENDLOOP.
ENDLOOP.
rv_string = concat_lines_of(
table = lt_buf_tab
sep = |\n| ).
ENDMETHOD.
ENDCLASS.
**********************************************************************
* UPDATE CALCULATOR
**********************************************************************
CLASS lcl_update_calculator DEFINITION
FINAL
CREATE PUBLIC.
PUBLIC SECTION.
CLASS-METHODS calculate_updated
IMPORTING
it_updated_files TYPE zif_abapgit_git_definitions=>ty_file_signatures_tt
it_current_checksums TYPE zif_abapgit_persistence=>ty_local_checksum_tt
it_local_files TYPE zif_abapgit_definitions=>ty_files_item_tt
RETURNING
VALUE(rt_checksums) TYPE zif_abapgit_persistence=>ty_local_checksum_tt.
PRIVATE SECTION.
CLASS-METHODS process_updated_files
CHANGING
ct_update_index TYPE zif_abapgit_git_definitions=>ty_file_signatures_ts
ct_checksums TYPE zif_abapgit_persistence=>ty_local_checksum_by_item_tt.
CLASS-METHODS add_new_files
IMPORTING
it_local TYPE zif_abapgit_definitions=>ty_files_item_tt
it_update_index TYPE zif_abapgit_git_definitions=>ty_file_signatures_ts
CHANGING
ct_checksums TYPE zif_abapgit_persistence=>ty_local_checksum_by_item_tt.
ENDCLASS.
CLASS lcl_update_calculator IMPLEMENTATION.
METHOD calculate_updated.
DATA lt_update_index TYPE zif_abapgit_git_definitions=>ty_file_signatures_ts.
DATA lt_checksums_sorted TYPE zif_abapgit_persistence=>ty_local_checksum_by_item_tt.
lt_checksums_sorted = it_current_checksums.
lt_update_index = it_updated_files.
process_updated_files(
CHANGING
ct_update_index = lt_update_index
ct_checksums = lt_checksums_sorted ).
add_new_files(
EXPORTING
it_update_index = lt_update_index
it_local = it_local_files
CHANGING
ct_checksums = lt_checksums_sorted ).
rt_checksums = lt_checksums_sorted.
ENDMETHOD.
METHOD process_updated_files.
DATA lv_cs_row TYPE i.
DATA lv_file_row TYPE i.
FIELD-SYMBOLS <ls_checksum> LIKE LINE OF ct_checksums.
FIELD-SYMBOLS <ls_file> LIKE LINE OF <ls_checksum>-files.
FIELD-SYMBOLS <ls_new_state> LIKE LINE OF ct_update_index.
" Loop through current checksum state, update sha1 for common files
LOOP AT ct_checksums ASSIGNING <ls_checksum>.
lv_cs_row = sy-tabix.
LOOP AT <ls_checksum>-files ASSIGNING <ls_file>.
lv_file_row = sy-tabix.
READ TABLE ct_update_index ASSIGNING <ls_new_state>
WITH KEY
path = <ls_file>-path
filename = <ls_file>-filename.
IF sy-subrc <> 0.
CONTINUE. " Missing in updated files -> nothing to update, skip
ENDIF.
IF <ls_new_state>-sha1 IS INITIAL. " Empty input sha1 is a deletion marker
DELETE <ls_checksum>-files INDEX lv_file_row.
ELSE.
<ls_file>-sha1 = <ls_new_state>-sha1. " Update sha1
CLEAR <ls_new_state>-sha1. " Mark as processed
ENDIF.
ENDLOOP.
IF lines( <ls_checksum>-files ) = 0. " Remove empty objects
DELETE ct_checksums INDEX lv_cs_row.
ENDIF.
ENDLOOP.
DELETE ct_update_index WHERE sha1 IS INITIAL. " Remove processed
ENDMETHOD.
METHOD add_new_files.
DATA lt_local_sorted TYPE zif_abapgit_definitions=>ty_files_item_by_file_tt.
DATA ls_checksum LIKE LINE OF ct_checksums.
FIELD-SYMBOLS <ls_checksum> LIKE LINE OF ct_checksums.
FIELD-SYMBOLS <ls_new_file> LIKE LINE OF it_update_index.
FIELD-SYMBOLS <ls_local> LIKE LINE OF lt_local_sorted.
lt_local_sorted = it_local.
" Add new files - not deleted and not marked as processed
LOOP AT it_update_index ASSIGNING <ls_new_file>.
READ TABLE lt_local_sorted ASSIGNING <ls_local>
WITH KEY
file-path = <ls_new_file>-path
file-filename = <ls_new_file>-filename.
IF sy-subrc <> 0.
" The file should be in locals, however:
" if the deserialization fails, the local file might not be there
" in this case no new CS added, and the file will appear to be remote+new
CONTINUE.
ENDIF.
READ TABLE ct_checksums ASSIGNING <ls_checksum>
WITH KEY
item-obj_type = <ls_local>-item-obj_type
item-obj_name = <ls_local>-item-obj_name.
IF sy-subrc <> 0.
MOVE-CORRESPONDING <ls_local>-item TO ls_checksum-item.
INSERT ls_checksum INTO TABLE ct_checksums ASSIGNING <ls_checksum>.
ENDIF.
APPEND <ls_new_file> TO <ls_checksum>-files.
ENDLOOP.
ENDMETHOD.
ENDCLASS.
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