User Summary improvements

Added "Top Links" list
Added "Most Liked By" list

Added "Bookmark count" stat

UX: Use fa heart icon instead of "like" text in stats

Change the order of the user stats

app/models/user_summary.rb

@@ -2,8 +2,8 @@
 
 class UserSummary
 
+  MAX_SUMMARY_RESULTS = 6
   MAX_BADGES = 6
-  MAX_TOPICS = 6
 
   alias :read_attribute_for_serialization :send
 
@@ -20,7 +20,7 @@ class UserSummary
       .where(user: @user)
       .order('like_count DESC, created_at ASC')
       .includes(:user, :category)
-      .limit(MAX_TOPICS)
+      .limit(MAX_SUMMARY_RESULTS)
   end
 
   def replies
@@ -33,7 +33,47 @@ class UserSummary
       .where('post_number > 1')
       .where('topics.archetype <> ?', Archetype.private_message)
       .order('posts.like_count DESC, posts.created_at ASC')
-      .limit(MAX_TOPICS)
+      .limit(MAX_SUMMARY_RESULTS)
+  end
+
+  def links
+    TopicLink
+      .where(user: @user)
+      .where(internal: false)
+      .where(reflection: false)
+      .order('clicks DESC, created_at ASC')
+      .limit(MAX_SUMMARY_RESULTS)
+  end
+
+  class LikedByUser < OpenStruct
+    include ActiveModel::SerializerSupport
+  end
+
+  def most_liked_by_users
+    likers_ids = []
+    counts = []
+    UserAction.where(user: @user)
+              .where(action_type: UserAction::WAS_LIKED)
+              .group(:acting_user_id)
+              .order("COUNT(*) DESC")
+              .limit(MAX_SUMMARY_RESULTS)
+              .pluck("acting_user_id, COUNT(*)")
+              .each do |i|
+                likers_ids << i[0]
+                counts << i[1]
+              end
+
+    User.where(id: likers_ids)
+        .pluck(:id, :username, :name, :uploaded_avatar_id)
+        .map.with_index do |u, i|
+      LikedByUser.new(
+        id: u[0],
+        username: u[1],
+        name: u[2],
+        avatar_template: User.avatar_template(u[1], u[3]),
+        likes: counts[i]
+      )
+    end
   end
 
   def badges
@@ -44,6 +84,13 @@ class UserSummary
     @user.user_stat
   end
 
+  def bookmark_count
+    UserAction
+      .where(user: @user)
+      .where(action_type: UserAction::BOOKMARK)
+      .count
+  end
+
   delegate :likes_given,
            :likes_received,
            :days_visited,