From 8c1ee663ae08ef4bce6149da02435aa7c4df9095 Mon Sep 17 00:00:00 2001
From: Joe Atzberger <ohiocore@gmail.com>
Date: Wed, 16 Nov 2016 15:17:10 -0800
Subject: [PATCH] Clean up inventory jquery

Main thing here is avoided error when `focus.offset()` is undefined.
---
 app/assets/javascripts/inventory.js | 36 +++++++++++------------------
 app/views/inventory/index.html.erb  |  2 +-
 2 files changed, 15 insertions(+), 23 deletions(-)

diff --git a/app/assets/javascripts/inventory.js b/app/assets/javascripts/inventory.js
index 700ff18..eedce70 100644
--- a/app/assets/javascripts/inventory.js
+++ b/app/assets/javascripts/inventory.js
@@ -1,8 +1,7 @@
 $(document).ready(function(){
   if($("[data-collapse='true']").length > 0) {
     $("ul", $("[data-collapse='true']")).each(function(){
-      var toggle_text = $(this).children("li[data-behavior='toggle-handler']");
-      toggle_text.each(function(){
+      $(this).children("li[data-behavior='toggle-handler']").each(function(){
         var icon = $(this).children("i");
         icon.toggle();
         var nested_list = $(this).next("li");
@@ -12,46 +11,39 @@ $(document).ready(function(){
           nested_list.slideToggle();
           expandedType = nested_list.children().attr('class');
           if (expandedType == 'folder-items' && icon.is('.glyphicon-minus-sign')) {
-            imageItems = nested_list.find('.item-image-link');
-            loadInventoryImages(imageItems);
+            loadInventoryImages(nested_list.find('.item-image-link'));
           }
-          // Refresh the scrollspy since we've changed the DOM
-          $('.scrollspy-content').scrollspy("refresh");
+          $('.scrollspy-content').scrollspy("refresh"); // Refresh the scrollspy since we've changed the DOM
         });
       });
     });
-    // Refresh the scrollspy since we've changed the DOM
-    $('.scrollspy-content').scrollspy("refresh");
+    $('.scrollspy-content').scrollspy("refresh"); // Refresh the scrollspy since we've changed the DOM
   }
 
   // When we have an anchor on the inventory page on page load
   if($(".blacklight-inventory").length > 0 && window.location.hash != '') {
     var focus = $("[data-reference-id='" + window.location.hash +"']");
     // Show the next list item and all its hidden list item parents
-    nested_list = focus.next("li");
-    nested_list.show();
-    imageItems = nested_list.find('.item-image-link');
-    loadInventoryImages(imageItems);
+    nested_list = focus.next("li").show();
+    loadInventoryImages(nested_list.find('.item-image-link'));
     focus.children("i").toggleClass("glyphicon-minus-sign");
     focus.parents("li:hidden").each(function(){
-      $(this).show();
-      $(this).prev("li").children("i").toggleClass("glyphicon-minus-sign");
+      $(this).show().prev("li").children("i").toggleClass("glyphicon-minus-sign");
     });
-    // Scroll to the item that we're trying to focus on.
-    $(window).scrollTop(focus.offset().top);
-    // Refresh the scrollspy since we've changed the DOM
-    $('.scrollspy-content').scrollspy("refresh");
+    if (focus.offset()) {
+      $(window).scrollTop(focus.offset().top); // Scroll to the item that we're trying to focus on.
+    }
+    $('.scrollspy-content').scrollspy("refresh"); // Refresh the scrollspy since we've changed the DOM
   }
 });
 
+// load all images on the inventory page; not currently used
 function loadAllInventoryImages() {
-  // load all images on the inventory page; not currently used
-  itemImages = $('.item-image-link');
-  loadInventoryImages(itemImages);
+  loadInventoryImages($('.item-image-link'));
 }
 
+// only load specified images on the inventory page by passing in a JQuery object (dom item)
 function loadInventoryImages(itemImages) {
-  // only load specified images on the inventory page by passing in a dom item
   for (var i = 0 ; i < itemImages.length; i++) {
     itemImages[i].innerHTML = '<a href="' + itemImages[i].attributes['data-image-link'].value + '"><img alt=\'' + itemImages[i].attributes['data-image-title'].value + '\' title=\'' +  itemImages[i].attributes['data-image-title'].value + '\' src="' + itemImages[i].attributes['data-image-url'].value + '"></a>'
   }
diff --git a/app/views/inventory/index.html.erb b/app/views/inventory/index.html.erb
index e89e677..d25c75c 100644
--- a/app/views/inventory/index.html.erb
+++ b/app/views/inventory/index.html.erb
@@ -42,7 +42,7 @@
                       <li>
                         <ul class="folder-items">
                           <li class="item-count"><%=t('bassi.show.item', count: folder.children.total_members)%>:</li>
-                            <ul class="item-list">
+                          <ul class="item-list">
                             <%- folder.children.each do |document| -%>
                               <li class="item-image-link" data-image-link="<%=solr_document_path(document[:id])%>" data-image-url="<%=show_image(document.images(:square).first)%>" data-image-title="<%=document.title%>">
                                 <noscript>