module Recommendations
  class User
    module Ratings
      def rate(item_id, rating)
        Recommendations.redis.hset("recommendations:ratings:user:#{id}", item_id, rating)
        Recommendations.redis.zadd("recommendations:ratings:item:#{item_id}", rating, id)
      end

      def ratings
        Recommendations.redis.hgetall("recommendations:ratings:user:#{id}")
      end
    end
  end
end