// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

/**
 * @fileoverview Simple functions for dismissible on-page help ("cues").
 */

/**
 * Dimisses the cue.  This both updates the DOM and hits the server to
 * record the fact that the user has dismissed it, so that it won't
 * be shown again.
 *
 * If no security token is present, only the DOM is updated and
 * nothing is recorded on the server.
 *
 * @param {string} cueId The identifier of the cue to hide.
 * @return {boolean} false to cancel any event.
 */
function CS_dismissCue(cueId) {
  let cueElements = document.querySelectorAll('.cue');
  for (let i = 0; i < cueElements.length; ++i) {
    cueElements[i].style.display = 'none';
  }

  if (CS_env.token) {
    window.prpcClient.call(
      'monorail.Users', 'SetUserPrefs',
      {prefs: [{name: cueId, value: 'true'}]});
  }
  return false;
}

// Exports
_CS_dismissCue = CS_dismissCue;