[Koha-bugs] [Bug 16431] Marc subfield structure should be cached using Koha::Cache

[bugzilla-daemon at bugs.koha-community.org]

https://bugs.koha-community.org/bugzilla3/show_bug.cgi?id=16431

--- Comment #1 from Jonathan Druart <jonathan.druart at bugs.koha-community.org> ---
Created attachment 51139
  -->
https://bugs.koha-community.org/bugzilla3/attachment.cgi?id=51139&action=edit
Bug 16431: Use Koha::Cache to cache marc subfield structure

The marc subfield structure is currently cached using a global variable
of C4::Context. The infos are retrieved every time a new context is
created.
This patch suggests to use Koha::Cache instead.

To achieve this goal, a new subroutine is created
C4::Biblio::GetMarcSubfieldStructure, it will be called from code which
needs to get the marc subfield structure. GetMarcFromKohaField,
GetMarcSubfieldStructureFromKohaField, TransformKohaToMarc and
_get_inverted_marc_field_map are modified accordingly and the cache is cleared
when the table is updated (from the 3 pl scripts modified by this patch).

The caching done in C4::Context (marcfromkohafield) is removed.

Test plan:
Play with the marc subfield structure (in the administration module),
then add and edit records and make sure everything went fine.

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