FEATURE: Add quote-modified class if a quote has been modified

lib/cooked_post_processor.rb

@@ -3,6 +3,7 @@
 
 require_dependency 'url_helper'
 require_dependency 'pretty_text'
+require_dependency 'quote_comparer'
 
 class CookedPostProcessor
   include ActionView::Helpers::NumberHelper
@@ -33,6 +34,7 @@ class CookedPostProcessor
       DiscourseEvent.trigger(:before_post_process_cooked, @doc, @post)
       post_process_oneboxes
       post_process_images
+      post_process_quotes
       keep_reverse_index_up_to_date
       optimize_urls
       update_post_image
@@ -90,6 +92,24 @@ class CookedPostProcessor
     end
   end
 
+  def post_process_quotes
+    @doc.css("aside.quote").each do |q|
+      post_number = q['data-post']
+      topic_id = q['data-topic']
+      if topic_id && post_number
+        comparer = QuoteComparer.new(
+          topic_id.to_i,
+          post_number.to_i,
+          q.css('blockquote').text
+        )
+
+        if comparer.modified?
+          q['class'] = ((q['class'] || '') + " quote-modified").strip
+        end
+      end
+    end
+  end
+
   def add_large_image_placeholder!(img)
     url = img["src"]