Methods to replace ordered arguments on strings and access certain paths on parsed JSON objects

i18n_messages_with_variables.groovy

   // UTIL METHODS

   /**
    * Replaces arguments in error messages: "This {0} is an error for {1}", [a, b] => "This a is an error for b"
    */
   private error_message_replace_values(String error_msg, List values)
   {
      for (int i = 0; i < values.size(); i++)
      {
         error_msg = error_msg.replace("{$i}", values[i].toString())
      }

      return error_msg
   }

   /**
    * object is a JSON parsed as a Map, we support JSON only for now!
    */
   private get_at_path(Map object, String path)
   {
      // path = a.b.c
      // path_quoted = "a"."b"."c"
      def path_quoted = '"'+ path.replaceAll('\\.', '"."') + '"'
      def command = ' o.'+ path_quoted

      // access object.a.b.c, where the object is named 'o' in the command
      Eval.me('o', object, command)
   }