Bug 28676: Cache and retrieve match_count when searching a cached hea…

…ding

We use match_count to determine if a new authority record should be created, however,
we were not adding this count to the cache, so if a record returned too many matches on first
lookup, we would create a new record on the second lookup

To test:
1 - Set Linker Module to 'Default'
2 - Enable  AutoCreateAuthorities  and  BiblioAddsAuthorities and  CatalogModuleRelink and LinkerRelink
3 - Add two copies of a single authority via Z39
4 - Add two headings for that authority to a bib record (e.g. a 610 and 710)
5 - Save the record and note a new authority is generated
6 - Repeat and see another is generated
7 - Apply patch
8 - Restart all the things
9 - Save the record again, no new authority created

Signed-off-by: Phil Ringnalda <[email protected]>

Signed-off-by: Joonas Kylmälä <[email protected]>

Signed-off-by: Jonathan Druart <[email protected]>

C4/Linker/Default.pm

@@ -37,6 +37,7 @@ sub get_link {
     if ( $self->{'cache'}->{$search_form.$auth_type}->{'cached'} ) {
         $authid = $self->{'cache'}->{$search_form.$auth_type}->{'authid'};
         $fuzzy  = $self->{'cache'}->{$search_form.$auth_type}->{'fuzzy'};
+        $match_count = $self->{'cache'}->{$search_form.$auth_type}->{'match_count'};
     }
     else {
 
@@ -77,6 +78,7 @@ sub get_link {
         $self->{'cache'}->{$search_form.$auth_type}->{'cached'} = 1;
         $self->{'cache'}->{$search_form.$auth_type}->{'authid'} = $authid;
         $self->{'cache'}->{$search_form.$auth_type}->{'fuzzy'}  = $fuzzy;
+        $self->{'cache'}->{$search_form.$auth_type}->{'match_count'} = $match_count;
     }
     return $self->SUPER::_handle_auth_limit($authid), $fuzzy, $match_count;
 }