implement super voters

app/models/super_voter.rb

@@ -0,0 +1,33 @@
+class SuperVoter < ActiveRecord::Base
+  MAGNITUDE = 5
+  DURATION = 1.week
+
+  belongs_to :user
+  validates_uniqueness_of :user_id
+  after_create :update_user_on_create
+  after_destroy :update_user_on_destroy
+
+  def self.prune!
+    where("created_at < ?", DURATION.ago).destroy_all
+  end
+
+  def self.init!
+    report = Reports::UserSimilarity.new(User.admins.first.id)
+    report.prime
+    report.fetch_similar_user_ids.scan(/\S+/).in_groups_of(2).each do |user_id, score|
+      unless where("user_id = ?", user_id.to_i).exists?
+        create(:user_id => user_id)
+      end
+    end
+  end
+
+  def update_user_on_create
+    user.is_super_voter = true
+    user.save
+  end
+
+  def update_user_on_destroy
+    user.is_super_voter = false
+    user.save
+  end
+end