Weigh staff likes higher when calculating scores. New site setting: `staff_like_weight`

can set the factor (default is 3)

app/models/post_action.rb

@@ -202,12 +202,22 @@ class PostAction < ActiveRecord::Base
     column = "#{post_action_type.to_s}_count"
     delta = deleted_at.nil? ? 1 : -1
 
-    # Voting also changes the sort_order
-    if post_action_type == :vote
-      Post.update_all ["vote_count = vote_count + :delta, sort_order = :max - (vote_count + :delta)", delta: delta, max: Topic.max_sort_order], id: post_id
+    # We probably want to refactor this method to something cleaner.
+    case post_action_type
+    when :vote
+      # Voting also changes the sort_order
+      Post.update_all ["vote_count = vote_count + :delta, sort_order = :max - (vote_count + :delta)",
+                        delta: delta,
+                        max: Topic.max_sort_order], id: post_id
+    when :like
+      # `like_score` is weighted higher for staff accounts
+      Post.update_all ["like_count = like_count + :delta, like_score = like_score + :score_delta",
+                        delta: delta,
+                        score_delta: user.staff? ? delta * SiteSetting.staff_like_weight : delta], id: post_id
     else
       Post.update_all ["#{column} = #{column} + ?", delta], id: post_id
     end
+
     Topic.update_all ["#{column} = #{column} + ?", delta], id: post.topic_id
 
 

app/models/site_setting.rb

@@ -114,6 +114,8 @@ class SiteSetting < ActiveRecord::Base
 
   setting(:allow_duplicate_topic_titles, false)
 
+  setting(:staff_like_weight, 3)
+
   setting(:add_rel_nofollow_to_user_content, true)
   setting(:exclude_rel_nofollow_domains, '')
   setting(:post_excerpt_maxlength, 300)

config/locales/server.en.yml

@@ -585,6 +585,7 @@ en:
     privacy_policy_url: "If you have a Privacy Policy document hosted elsewhere that you want to use, provide the full URL here."
 
     newuser_spam_host_threshold: "How many times a new user can post a link to the same host within their `newuser_spam_host_posts` posts before being considered spam."
+    staff_like_weight: "Extra weighting factor given to likes when performed by staff."
 
   notification_types:
     mentioned: "%{display_username} mentioned you in %{link}"

db/migrate/20130527152648_add_like_score_to_posts.rb

@@ -0,0 +1,19 @@
+class AddLikeScoreToPosts < ActiveRecord::Migration
+  def change
+    add_column :posts, :like_score, :integer, default: 0, null: false
+
+    execute "UPDATE posts p
+              set like_score = x.like_score
+              FROM (SELECT pa.post_id,
+                            SUM(CASE
+                                 WHEN u.admin OR u.moderator THEN 3
+                                 ELSE 1
+                                END) AS like_score
+                    FROM post_actions AS pa
+                    INNER JOIN users AS u ON u.id = pa.user_id
+                    GROUP BY pa.post_id) AS x
+              WHERE x.post_id = p.id"
+  end
+end
+
+

lib/score_calculator.rb

@@ -3,7 +3,7 @@ class ScoreCalculator
   def self.default_score_weights
     {
       reply_count: 5,
-      like_count: 15,
+      like_score: 15,
       incoming_link_count: 5,
       bookmark_count: 2,
       avg_time: 0.05,

spec/models/post_action_spec.rb

@@ -122,18 +122,30 @@ describe PostAction do
   end
 
   describe 'when a user likes something' do
-    it 'should increase the post counts when a user likes' do
-      lambda {
-        PostAction.act(codinghorror, post, PostActionType.types[:like])
-        post.reload
-      }.should change(post, :like_count).by(1)
-    end
+    it 'should increase the `like_count` and `like_score` when a user likes something' do
+      PostAction.act(codinghorror, post, PostActionType.types[:like])
+      post.reload
+      post.like_count.should == 1
+      post.like_score.should == 1
+      post.topic.reload
+      post.topic.like_count.should == 1
 
-    it 'should increase the forum topic like count when a user likes' do
-      lambda {
-        PostAction.act(codinghorror, post, PostActionType.types[:like])
-        post.topic.reload
-      }.should change(post.topic, :like_count).by(1)
+      # When a staff member likes it
+      PostAction.act(moderator, post, PostActionType.types[:like])
+      post.reload
+      post.like_count.should == 2
+      post.like_score.should == 4
+
+      # Removing likes
+      PostAction.remove_act(codinghorror, post, PostActionType.types[:like])
+      post.reload
+      post.like_count.should == 1
+      post.like_score.should == 3
+
+      PostAction.remove_act(moderator, post, PostActionType.types[:like])
+      post.reload
+      post.like_count.should == 0
+      post.like_score.should == 0
     end
   end