require 'sass'

module Sass
  module Rails
    class CacheStore < ::Sass::CacheStores::Base
      attr_reader :environment

      def initialize(environment)
        @environment = environment
      end

      def _store(key, version, sha, contents)
        environment.cache_set("sass/#{key}", {:version => version, :sha => sha, :contents => contents})
      end

      def _retrieve(key, version, sha)
        if obj = environment.cache_get("sass/#{key}")
          return unless obj[:version] == version
          return unless obj[:sha] == sha
          obj[:contents]
        else
          nil
        end
      end

      def path_to(key)
        key
      end
    end
  end
end