// unfasten.js
(function () {
  /*global adventurejs A*/
  var p = adventurejs.Tangible.prototype;

  /**
   * <strong>unfasten</strong> tries several methods for
   * unfastening.
   * @memberOf adventurejs.Tangible
   * @method adventurejs.Tangible#unfasten
   * @returns {string}
   */
  p.unfasten = function Tangible_unfasten() {
    let unfasten = "";
    if (this.is.zipped) {
      unfasten = "unzip";
      this.is.zipped = false;
      this.incrementDoVerbCount("unzip", "dov");
    } else if (this.is.buttoned) {
      unfasten = "unbutton";
      this.is.buttoned = false;
      this.incrementDoVerbCount("unbutton", "dov");
    }
    return unfasten;
  };
})();