add 'Most Liked' and 'Most Replied To' columns in user summary

app/models/user_summary.rb

@@ -46,7 +46,7 @@ class UserSummary
       .limit(MAX_SUMMARY_RESULTS)
   end
 
-  class LikedByUser < OpenStruct
+  class UserWithCount < OpenStruct
     include ActiveModel::SerializerSupport
   end
 
@@ -65,14 +65,71 @@ class UserSummary
     User.where(id: likers.keys)
         .pluck(:id, :username, :name, :uploaded_avatar_id)
         .map do |u|
-      LikedByUser.new(
+      UserWithCount.new(
         id: u[0],
         username: u[1],
         name: u[2],
         avatar_template: User.avatar_template(u[1], u[3]),
-        likes: likers[u[0].to_s]
+        count: likers[u[0].to_s]
       )
-    end.sort_by { |u| -u[:likes] }
+    end.sort_by { |u| -u[:count] }
+  end
+
+  def most_liked_users
+    liked_users = {}
+    UserAction.joins(:target_topic, :target_post)
+              .where('topics.archetype <> ?', Archetype.private_message)
+              .where(action_type: UserAction::WAS_LIKED)
+              .where(acting_user_id: @user.id)
+              .group(:user_id)
+              .order('COUNT(*) DESC')
+              .limit(MAX_SUMMARY_RESULTS)
+              .pluck('user_actions.user_id, COUNT(*)')
+              .each { |l| liked_users[l[0].to_s] = l[1] }
+
+    User.where(id: liked_users.keys)
+        .pluck(:id, :username, :name, :uploaded_avatar_id)
+        .map do |u|
+      UserWithCount.new(
+        id: u[0],
+        username: u[1],
+        name: u[2],
+        avatar_template: User.avatar_template(u[1], u[3]),
+        count: liked_users[u[0].to_s]
+      )
+    end.sort_by { |u| -u[:count] }
+  end
+
+  REPLY_ACTIONS ||= [UserAction::RESPONSE, UserAction::QUOTE, UserAction::MENTION]
+
+  def most_replied_to_users
+    replied_users = {}
+
+    Post
+      .joins(:topic)
+      .joins('JOIN posts replies ON posts.topic_id = replies.topic_id AND posts.reply_to_post_number = replies.post_number')
+      .includes(:topic)
+      .secured(@guardian)
+      .merge(Topic.listable_topics.visible.secured(@guardian))
+      .where(user: @user)
+      .where('replies.user_id <> ?', @user.id)
+      .group('replies.user_id')
+      .order('COUNT(*) DESC')
+      .limit(MAX_SUMMARY_RESULTS)
+      .pluck('replies.user_id, COUNT(*)')
+      .each { |r| replied_users[r[0].to_s] = r[1] }
+
+    User.where(id: replied_users.keys)
+        .pluck(:id, :username, :name, :uploaded_avatar_id)
+        .map do |u|
+      UserWithCount.new(
+        id: u[0],
+        username: u[1],
+        name: u[2],
+        avatar_template: User.avatar_template(u[1], u[3]),
+        count: replied_users[u[0].to_s]
+      )
+    end.sort_by { |u| -u[:count] }
   end
 
   def badges