implemented moderator dashboard queue

app/logical/moderator/dashboard/queries/comment.rb

@@ -4,8 +4,27 @@ module Moderator
       class Comment
         attr_reader :comment, :count
 
+        def self.all(min_date, max_level)
+          sql = <<-EOS
+            SELECT comment_votes.comment_id, count(*) 
+            FROM comment_votes 
+            JOIN comments ON comments.id = comment_id 
+            JOIN users ON users.id = comments.creator_id 
+            WHERE 
+              comment_votes.created_at > ? 
+              AND comments.score < 0 
+              AND users.level <= ? 
+            GROUP BY comment_votes.comment_id 
+            HAVING count(*) >= 3 
+            ORDER BY count(*) DESC 
+            LIMIT 10
+          EOS
+          
+          ActiveRecord::Base.select_all_sql(sql, min_date, max_level).map {|x| new(x)}
+        end
+
         def initialize(hash)
-          @comment = Comment.find(hash["comment_id"])
+          @comment = ::Comment.find(hash["comment_id"])
           @count = hash["count"]
         end
       end