From 8cde45e0723a4b34bdf26c7ef4cfd2d8e767c837 Mon Sep 17 00:00:00 2001
From: Jonathan Druart <jonathan.druart@bugs.koha-community.org>
Date: Wed, 13 Dec 2023 11:10:24 +0100
Subject: [PATCH] Bug 35558: Do not retrieve the local image if none exists

On the search results we are fetching the thumbnails of the local cover
images using catalogue/image.pl
Which means 1 GET per results on the page.

This patch suggests to have this information beforehand in order to
reduce the number of hits and network traffic?

However the page load will be slightly slower ofc.

Signed-off-by: Owen Leonard <oleonard@myacpl.org>
Signed-off-by: Nick Clemens <nick@bywatersolutions.com>
Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>
---
 catalogue/search.pl                                          | 4 ++++
 koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/results.tt | 2 +-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff --git a/catalogue/search.pl b/catalogue/search.pl
index c6ba6c52fe..6430c6ab91 100755
--- a/catalogue/search.pl
+++ b/catalogue/search.pl
@@ -666,6 +666,10 @@ for (my $i=0;$i<@servers;$i++) {
                 if ( grep {$_ eq $line->{'biblionumber'}} @cart_list) {
                     $line->{'incart'} = 1;
                 }
+
+                if ( C4::Context->preference('LocalCoverImages') ) {
+                    $line->{has_local_cover_image} = $line->{biblio_object}->cover_images->count;
+                }
             }
             my( $page_numbers, $hits_to_paginate, $pages, $current_page_number, $previous_page_offset, $next_page_offset, $last_page_offset ) =
                 Koha::SearchEngine::Search->pagination_bar(
diff --git a/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/results.tt b/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/results.tt
index e09aeeb072..91db336895 100644
--- a/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/results.tt
+++ b/koha-tmpl/intranet-tmpl/prog/en/modules/catalogue/results.tt
@@ -480,7 +480,7 @@
                                             [% IF ( CoverImagePlugins || AmazonCoverImages  || LocalCoverImages || IntranetCoce || ( SyndeticsCovers ) || (Koha.Preference('CustomCoverImages') && Koha.Preference('CustomCoverImagesURL')) ) %]
     <td class="bookcoverimg">
         <div id="cover-slides-[% SEARCH_RESULT.biblionumber | html %]" class="cover-slides" data-biblionumber="[% SEARCH_RESULT.biblionumber | html %]" data-isbn="[% To.json(SEARCH_RESULT.normalized_isbn) | $raw %]" data-processedbiblio="[% PROCESS biblio_a_href biblionumber => SEARCH_RESULT.biblionumber | $raw %]">
-            [% IF ( LocalCoverImages ) %]
+            [% IF ( LocalCoverImages && SEARCH_RESULT.has_local_cover_image ) %]
                 <div id="local-coverimg-[% SEARCH_RESULT.biblionumber | html %]" class="cover-image local-coverimg">
                     <a href="[% PROCESS biblio_a_href biblionumber => SEARCH_RESULT.biblionumber %]">
                         <img src="/cgi-bin/koha/catalogue/image.pl?thumbnail=1&amp;biblionumber=[% SEARCH_RESULT.biblionumber | uri %]" alt="Local cover image" />
-- 
2.20.1