module MovieStone
  class Renderer
    def initialize(template_name)
      @template_file = File.expand_path("../templates/#{template_name}.erb", __FILE__)
      raise ArgumentError, "Template is invalid" unless File.exist? @template_file
    end

    def render(movie)
      @movie = movie
      ERB.new(File.read(@template_file)).result(binding)
    end
  end
end