Remove narrative_image attribute when possible

Author: migueldlr

app/resources/card_resource.rb

@@ -167,14 +167,17 @@ def images(id, face_index = nil)
     url_prefix = Rails.configuration.x.printing_images.nrdb_classic_prefix
     face_suffix = "-#{face_index}" unless face_index.nil?
     has_narrative_image = :narrative_text.presence && !face_index.nil?
+    image_sizes = {
+      'tiny' => "#{url_prefix}/tiny/#{id}#{face_suffix}.jpg",
+      'small' => "#{url_prefix}/small/#{id}#{face_suffix}.jpg",
+      'medium' => "#{url_prefix}/medium/#{id}#{face_suffix}.jpg",
+      'large' => "#{url_prefix}/large/#{id}#{face_suffix}.jpg"
+    }
+
+    image_sizes.narrative = "#{url_prefix}/large/#{id}#{face_suffix}-narrative.jpg" if has_narrative_image
+
     {
-      'nrdb_classic' => {
-        'tiny' => "#{url_prefix}/tiny/#{id}#{face_suffix}.jpg",
-        'small' => "#{url_prefix}/small/#{id}#{face_suffix}.jpg",
-        'medium' => "#{url_prefix}/medium/#{id}#{face_suffix}.jpg",
-        'large' => "#{url_prefix}/large/#{id}#{face_suffix}.jpg",
-        'narrative' => has_narrative_image ? "#{url_prefix}/large/#{id}#{face_suffix}-narrative.jpg" : nil
-      }
+      'nrdb_classic' => image_sizes
     }
   end
 end