add Comics Plus cover images when we have them, closes #41

catalog-js/comics-plus-cover.js

@@ -0,0 +1,40 @@
+// scrape the book cover image URL from the 856$u field  and add it as a Koha cover image
+if (path.match('/cgi-bin/koha/opac-detail.pl')) {
+    let hasCover = () => !!$('.cover-image').length
+
+    const addCPCover = function () {
+        if ($('#biblio-cover-slider').length && !hasCover()) {
+            // COCE cover image lookup still running, we have to wait
+            return
+        }
+
+        $('.online_resources .resource_list a').each(function () {
+            let link = $(this)
+            let url = link.attr('href')
+            // example URL: https://uniapi.librarypass.com/index.php/images/cover/md/6880002490009385420231110.png
+            if (url.match('uniapi.librarypass.com') && !hasCover()) {
+                // html adapted from Koha local cover image
+                $('.bookcover').first().html(
+`<div class="bookcover">
+    <div id="biblio-cover-slider" class="cover-slider">
+        <div class="cover-image local-coverimg" style="display: block;">
+            <a href="${url}">
+                <img style="max-width:107px;" src="${url}">
+            </a>
+        </div>
+    </div>
+</div>`
+                )
+            }
+            // if the text is simply "image" either way, whether we added a cover image or not, remove link
+            if (link.text().toLowerCase().trim() === 'image') {
+                link.parent().remove()
+            }
+        })
+
+        // clear the interval
+        clearInterval(interval)
+    }
+
+    const interval = setInterval(addCPCover, 400)
+}