Bug 10584 - Hide OPAC biblio details if all items are hidden

If there are items for a given biblio number, and they are all
hidden, then biblio needs to be hidden. If the biblio needs to
be hidden, this is done by setting the biblionumber to 0, which
triggers the same output as if the biblionumber does not exist.

Signed-off-by: Srdjan <srdjan@catalyst.net.nz>
Signed-off-by: Kyle M Hall <kyle@bywatersolutions.com>
Passes koha-qa.pl, works as advertised.

opac/opac-detail.pl

@@ -70,9 +70,20 @@ my ( $template, $borrowernumber, $cookie ) = get_template_and_user(
     }
 );
 
-my $biblionumber = $query->param('biblionumber') || $query->param('bib');
+my $biblionumber = $query->param('biblionumber') || $query->param('bib') || 0;
 $biblionumber = int($biblionumber);
 
+my @itemsmatchingbiblionumber = GetItemsInfo($biblionumber);
+if (scalar @itemsmatchingbiblionumber >= 1) {
+    my @items2hide = GetHiddenItemnumbers(@itemsmatchingbiblionumber);
+
+    if (scalar @items2hide == scalar @itemsmatchingbiblionumber ) {
+        # biblionumber=0 effectively hides the biblio record
+        # since there is no such biblionumber.
+        $biblionumber = 0;
+    }
+}
+
 my $record       = GetMarcBiblio($biblionumber);
 if ( ! $record ) {
     print $query->redirect("/cgi-bin/koha/errors/404.pl"); # escape early