Make topic lists show last activity more intuitively

app/serializers/listable_topic_serializer.rb

@@ -8,6 +8,9 @@ class ListableTopicSerializer < BasicTopicSerializer
              :image_url,
              :created_at,
              :last_posted_at,
+             :bumped,
+             :bumped_at,
+             :bumped_age,
              :age,
              :unseen,
              :last_read_post_number,
@@ -18,6 +21,16 @@ class ListableTopicSerializer < BasicTopicSerializer
   def age
     AgeWords.age_words(Time.now - (object.created_at || Time.now))
   end
+  
+  def bumped
+    object.created_at < object.bumped_at
+  end
+  
+  def bumped_age
+    return nil if object.bumped_at.blank?
+    AgeWords.age_words(Time.now - object.bumped_at)
+  end
+  alias include_bumped_age? :bumped
 
   def seen
     object.user_data.present?

app/serializers/suggested_topic_serializer.rb

@@ -1,11 +1,6 @@
 class SuggestedTopicSerializer < ListableTopicSerializer
 
-  attributes :archetype, :like_count, :views, :last_post_age
+  attributes :archetype, :like_count, :views
   has_one :category, embed: :objects
 
-  def last_post_age
-    return nil if object.last_posted_at.blank?
-    AgeWords.age_words(Time.now - object.last_posted_at)
-  end
-
 end

app/serializers/topic_list_item_serializer.rb

@@ -8,7 +8,6 @@ class TopicListItemSerializer < ListableTopicSerializer
              :pinned,
              :closed,
              :archived,
-             :last_post_age,
              :starred,
              :has_best_of,
              :archetype
@@ -16,11 +15,6 @@ class TopicListItemSerializer < ListableTopicSerializer
   has_one :category
   has_many :posters, serializer: TopicPosterSerializer, embed: :objects
 
-  def last_post_age
-    return nil if object.last_posted_at.blank?
-    AgeWords.age_words(Time.now - object.last_posted_at)
-  end
-
   def starred
     object.user_data.starred?
   end