// isConnectedToNothing.js
(function () {
  /*global adventurejs A*/
  var p = adventurejs.Asset.prototype;
  /**
   * Check whether this asset is currently connected as an indirect
   * object to nothing (aka null) by the specified verb.
   * For example, in the case of a computer that can be plugged in, an
   * author might prefer not to create a specific outlet into which to
   * plug the computer. For that case we allow 'plug in computer', and
   * write a null value to
   * <code class="property">asset.is.connected_by.plugIn.to_iov</code>
   * to represent the computer's plugged in state.
   * @memberOf adventurejs.Asset
   * @method adventurejs.Asset#isConnectedToNothing
   * @param {String} verb The name of a verb.
   * @param {String} ov Direct or indirect object of verb.
   * @return {Boolean}
   */
  p.isConnectedToNothing = function Asset_isConnectedToNothing(verb, ov) {
    if (
      !verb ||
      !this.game.dictionary.verbs[verb] ||
      !this.is.connected_by ||
      !this.is.connected_by[verb]
    )
      return false;

    if (ov !== "dov" && ov !== "iov") {
      if (this.isDOV(verb)) ov = "iov";
      else if (this.isIOV(verb)) ov = "dov";
    }

    if (
      this.is.connected_by[verb]["to_" + ov] &&
      this.is.connected_by[verb]["to_" + ov].length
    ) {
      return true;
    }

    return false;
  };
})();