module Conjur
  module WebServer
    # a helper class to render HTML partials
    class Renderer
      def initialize root
        @root = root
        @files = []
      end

      attr_reader :files

      def render template
        ERB.new(template).result binding
      end

      private

      def method_missing name, *a, &b
        super if !a.empty? || block_given?

        # try to load fragments
        path = expand_path "_#{name}.html"
        super unless File.exists? path

        @files << path
        File.read path
      end

      def expand_path filename
        File.expand_path(filename, @root)
      end
    end
  end
end