function initNavSidebar()

in openmeetings-util/js/reflow-skin.js [221:355]

• 57 lines of code
• 12 McCabe index (conditional complexity)

  function initNavSidebar() {
    var navSidebar = $('.navside-menu');
    if (navSidebar.length == 0) {
      return;
    }

    /**
     * Gets the slug name of first <a> element in nav sidebar.
     */
    function findFirstMenu() {
      var href = $('.navside-menu a').first();
      return href.attr('slug-name');
    }

    /**
     * create a link
     * @param {*} slugName
     * @param {*} chapter
     */
    function hashes(slugName, chapter) {
      var hash = '#' + slugName;
      if (chapter) {
        hash += TOC_SEPARATOR + chapter;
      }
      return hash;
    }


    /**
     * Split the fragement of url and returns an array containing following info:
     * - the slugname of section
     * - the chapter in the section
     * @param {*} url the url the split
     */
    function splitUrl(url) {
      var index = url.indexOf(TOC_SEPARATOR, url.indexOf('#'));
      if (index >= 0) {
        return [url.substring(0, index), url.substring(index + TOC_SEPARATOR.length)];
      }
      return [url];
    }

    $window.bind('hashchange', function (evt) {
      var originalEvt = evt.originalEvent;
      // not load page if is identical
      var oldURL;
      var newURL;
      var identicalPage = false;

      // do nothing if same url
      if (originalEvt) {
        oldURL = originalEvt.oldURL;
        newURL = originalEvt.newURL;
        if (oldURL === newURL) {
          return;
        }
      }



      var item = null;
      var hash = window.location.hash;
      // set the first page in nav sidebar
      if (window.location.hash == '') {
        hash = hashes(findFirstMenu());
      }

      var chapter = '';
      var splittedUrl = splitUrl(hash);
      var section = splittedUrl[0].substring(1);
      if (splittedUrl.length > 1) {
        chapter = splittedUrl[1];
      } else {
        chapter = null;
      }

      // search the item in nav sidebar corresponding to section
      if (section.endsWith('html')) {
        item = $('.navside-menu a[href$="' + section + '"]');
      } else {
        item = $('.navside-menu a[slug-name$="' + section + '"]');
      }
      if (item.length) {

        // expand the parent of item if it is sub-section menu.
        var collapsible = item.parents('ul.collapse');
        if (collapsible.length > 0) {
          collapsible.collapse('show');
        }
        var slugName = item.attr('slug-name');
        window.location.hash = hashes(slugName, chapter);

        if (originalEvt) {
          oldURL = splitUrl(originalEvt.oldURL);
          newURL = splitUrl(originalEvt.newURL);
          identicalPage = oldURL[0] === newURL[0];
        }
        if (identicalPage) {
          return;
        }
        var href = item.attr('href').substring(1);
        loadFrame(href, slugName);
      }
    });


    // init fragment url part
    var fragment = window.location.hash;
    if (!fragment) {
      var href = findFirstMenu();
      window.location.hash = hashes(href);
    } else {
      // enforce load frame
      $window.trigger('hashchange');
    }

    // select first menu item on expand
    if ($body.hasClass('m-sidenav-select-first-on-select')) {
      navSidebar.on('shown.bs.collapse', function (ev) {
        var el = $(ev.target);
        // break if have already active item
        if (el.find('li.active').length > 0) {
          return;
        }

        var href = el.find('li a').first();
        window.location.hash = hashes(href.attr('slug-name'));
      });
    }

    // prevent event on collapse clik.
    navSidebar.find("a[href=\\#]").click(function (event) {
      event.preventDefault();
    });
  }