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(function () {
  'use strict';

/**
   * @copyright  (C) 2020 Open Source Matters, Inc. <https://www.joomla.org>
   * @license    GNU General Public License version 2 or later; see LICENSE.txt
   */

/**
   * Add a keyboard event listener to the Select a Module Type search element.
   *
   * IMPORTANT! This script is meant to be loaded deferred. This means that a. it's non-blocking
   * (the browser can load it whenever) and b. it doesn't need an on DOMContentLoaded event handler
   * because the browser is guaranteed to execute it only after the DOM content has loaded, the
   * whole point of it being deferred.
   *
   * The search box has a keyboard handler that fires every time you press a keyboard button or send
   * a keypress with a touch / virtual keyboard. We then iterate all module type cards and check if
   * the plain text (HTML stripped out) representation of the module title or description partially
   * matches the text you entered in the search box. If it doesn't we add a Bootstrap class to hide
   * the module.
   *
   * This way we limit the displayed modules only to those searched.
   *
   * This feature follows progressive enhancement. The search box is hidden by default and only
   * displayed when this JavaScript here executes. Furthermore, session storage is only used if it
   * is available in the browser. That's a bit of a pain but makes sure things won't break in older
   * browsers.
   *
   * Furthermore and to facilitate the user experience we auto-focus the search element which has a
   * suitable title so that non-sighted users are not startled. This way we address both UX concerns
   * and accessibility.
   *
   * Finally, the search string is saved into session storage on the assumption that the user is
   * probably going to be creating multiple instances of the same module, one after another, as is
   * typical when building a new Joomla! site.
   */
  // Make sure the element exists i.e. a template override has not removed it.
  var elSearch = document.getElementById('comModulesSelectSearch');
  var elSearchContainer = document.getElementById('comModulesSelectSearchContainer');
  var elSearchHeader = document.getElementById('comModulesSelectTypeHeader');
  var elSearchResults = document.getElementById('comModulesSelectResultsContainer');
  var alertElement = document.querySelector('.modules-alert');
  var elCards = [].slice.call(document.querySelectorAll('.comModulesSelectCard'));

if (elSearch && elSearchContainer) {
    // Add the keyboard event listener which performs the live search in the cards
    elSearch.addEventListener('keyup', function (event) {
      /** @type {KeyboardEvent} event */
      var partialSearch = event.target.value;
      var hasSearchResults = false; // Save the search string into session storage

if (typeof sessionStorage !== 'undefined') {
        sessionStorage.setItem('Joomla.com_modules.new.search', partialSearch);
      } // Iterate all the module cards

elCards.forEach(function (card) {
        // First remove the class which hide the module cards
        card.classList.remove('d-none'); // An empty search string means that we should show everything

if (!partialSearch) {
          return;
        }

var cardHeader = card.querySelector('.new-module-title');
        var cardBody = card.querySelector('.card-body');
        var title = cardHeader ? cardHeader.textContent : '';
        var description = cardBody ? cardBody.textContent : ''; // If the module title and description don’t match add a class to hide it.

if (title && !title.toLowerCase().includes(partialSearch.toLowerCase()) && description && !description.toLowerCase().includes(partialSearch.toLowerCase())) {
          card.classList.add('d-none');
        } else {
          hasSearchResults = true;
        }
      });

if (hasSearchResults || !partialSearch) {
        alertElement.classList.add('d-none');
        elSearchHeader.classList.remove('d-none');
        elSearchResults.classList.remove('d-none');
      } else {
        alertElement.classList.remove('d-none');
        elSearchHeader.classList.add('d-none');
        elSearchResults.classList.add('d-none');
      }
    }); // For reasons of progressive enhancement the search box is hidden by default.

elSearchContainer.classList.remove('d-none'); // Focus the just show element

elSearch.focus();

try {
      if (typeof sessionStorage !== 'undefined') {
        // Load the search string from session storage
        elSearch.value = sessionStorage.getItem('Joomla.com_modules.new.search') || ''; // Trigger the keyboard handler event manually to initiate the search

elSearch.dispatchEvent(new KeyboardEvent('keyup'));
      }
    } catch (e) {// This is probably Internet Explorer which doesn't support the KeyboardEvent constructor :(
    }
  }

}());