module Rad
  class StaticFiles

    def initialize(app, dir, filter = nil)
      @app = app
      @dir = File.expand_path(dir)
      @file_server = Rack::File.new(@dir)
      @filter = filter
    end

    def call(env)
      path = env["PATH_INFO"]

      if (!@filter or (@filter and @filter =~ path)) and File.exist?("#{@dir}#{path}")
        @file_server.call(env)
      else
        @app.call(env)
      end
    end
  end
end