Define header CSS class if menu items have children

Question

I am using two menu modules to display parent and children items in different locations in the website header. The simplified code below shows how it is written in index.php.

I am needing to check to see if a menu item has children. If it does, the following class has-nested-nav should be added to the <header> div. This class will adjust the bottom padding on the header depending on if the nested nav module is displayed.

I have tested the code, but it does not yield the results I am needing. Please advise on what should be changed to get the code working.

Cheers.

Template HTML

<header class="**Add has-nested-nav class here**">
    <!-- Parent menu items -->
    <section>
    <?php if($this->countModules('global-navigation')): ?>
        <jdoc:include type="modules" name="global-navigation" />
    <?php endif; ?>
    </section>

    <!-- Children menu items -->
    <section>
    <?php if($this->countModules('global-nested-navigation')): ?>
        <jdoc:include type="modules" name="global-nested-navigation" />
    <?php endif; ?>
    </section>
</header>

Template includes/helper.php file

$hasParent = $menu->getItem( $menu->getActive()->parent_id );
if ($hasParent == 1) {
    $hasNestedNav = true;
} else {
    $hasNestedNav = false;
}

$mrwcNavClass = '';
if ($hasNestedNav) {
    $mrwcNavClass .= ' has-nested-nav';
}

if (!defined( 'MRWC_NAV_CLASS' )) {
    define( 'MRWC_NAV_CLASS', $mrwcNavClass);
}

Current Code - Not working

$active = $menu->getActive();
// $childCount = count($menu->getItems('parent_id', $active->id));
$children = $menu->getItems('parent_id', $active->id);
$visibleChildren = array_filter($children, function($child) {
    return ($child->getParams('menu_show', 1) === 1);
});

$childCount = count($visibleChildren);
if ($childCount == 1) {
    $hasNestedNav = true;
} else {
    $hasNestedNav = false;
}

$active menu item dump

object(Joomla\CMS\Menu\MenuItem)[699]
public 'id' => string '122' (length=3)
public 'menutype' => string 'global-navigation' (length=17)
public 'title' => string 'Education' (length=9)
public 'alias' => string 'education' (length=9)
public 'note' => string '' (length=0)
public 'route' => string 'education' (length=9)
public 'link' => string 'index.php?option=com_content&view=article&id=2' (length=46)
public 'type' => string 'component' (length=9)
public 'level' => string '1' (length=1)
public 'language' => string '*' (length=1)
public 'browserNav' => string '0' (length=1)
public 'access' => string '1' (length=1)
protected 'params' => 
  object(Joomla\Registry\Registry)[913]
  protected 'data' => 
    object(stdClass)[915]
      public 'show_title' => string '' (length=0)
      public 'link_titles' => string '' (length=0)
      public 'show_intro' => string '' (length=0)
      public 'info_block_position' => string '' (length=0)
      public 'info_block_show_title' => string '' (length=0)
      public 'show_category' => string '' (length=0)
      public 'link_category' => string '' (length=0)
      public 'show_parent_category' => string '' (length=0)
      public 'link_parent_category' => string '' (length=0)
      public 'show_associations' => string '' (length=0)
      public 'show_author' => string '' (length=0)
      public 'link_author' => string '' (length=0)
      public 'show_create_date' => string '' (length=0)
      public 'show_modify_date' => string '' (length=0)
      public 'show_publish_date' => string '' (length=0)
      public 'show_item_navigation' => string '' (length=0)
      public 'show_vote' => string '' (length=0)
      public 'show_icons' => string '' (length=0)
      public 'show_print_icon' => string '' (length=0)
      public 'show_email_icon' => string '' (length=0)
      public 'show_hits' => string '' (length=0)
      public 'show_tags' => string '' (length=0)
      public 'show_noauth' => string '' (length=0)
      public 'urls_position' => string '' (length=0)
      public 'menu-anchor_title' => string 'Education' (length=9)
      public 'menu-anchor_css' => string '' (length=0)
      public 'menu_image' => string 'images/media/images/svg/nav-current-marker.svg' (length=46)
      public 'menu_image_css' => string '' (length=0)
      public 'menu_text' => int 1
      public 'menu_show' => int 1
      public 'page_title' => string '' (length=0)
      public 'show_page_heading' => string '' (length=0)
      public 'page_heading' => string 'Education' (length=9)
      public 'pageclass_sfx' => string '' (length=0)
      public 'menu-meta_description' => string '' (length=0)
      public 'menu-meta_keywords' => string '' (length=0)
      public 'robots' => string '' (length=0)
      public 'secure' => int 0
  protected 'initialized' => boolean true
  public 'separator' => string '.' (length=1)
  public 'home' => string '0' (length=1)
  public 'img' => string ' ' (length=1)
  public 'template_style_id' => string '0' (length=1)
  public 'component_id' => string '22' (length=2)
  public 'parent_id' => string '1' (length=1)
  public 'component' => string 'com_content' (length=11)
  public 'tree' => 
      array (size=1)
      0 => string '122' (length=3)
      public 'query' => 
          array (size=3)
          'option' => string 'com_content' (length=11)
          'view' => string 'article' (length=7)
          'id' => string '2' (length=1)

$children menu items dump

array (size=2)
0 => 
    object(Joomla\CMS\Menu\MenuItem)[726]
    public 'id' => string '1544' (length=4)
    public 'menutype' => string 'global-navigation' (length=17)
    public 'title' => string 'Classrooms' (length=10)
    public 'alias' => string 'classroom' (length=9)
    public 'note' => string '' (length=0)
    public 'route' => string 'education/classroom' (length=19)
    public 'link' => string 'index.php?option=com_content&view=article&id=261' (length=48)
    public 'type' => string 'component' (length=9)
    public 'level' => string '2' (length=1)
    public 'language' => string '*' (length=1)
    public 'browserNav' => string '0' (length=1)
    public 'access' => string '1' (length=1)
    protected 'params' => 
        object(Joomla\Registry\Registry)[1490]
        protected 'data' => 
            object(stdClass)[1492]
            ...
            protected 'initialized' => boolean true
            public 'separator' => string '.' (length=1)
            public 'home' => string '0' (length=1)
            public 'img' => string ' ' (length=1)
            public 'template_style_id' => string '0' (length=1)
            public 'component_id' => string '22' (length=2)
            public 'parent_id' => string '122' (length=3)
            public 'component' => string 'com_content' (length=11)
            public 'tree' => 
                array (size=2)
                0 => string '122' (length=3)
                1 => string '1544' (length=4)
            public 'query' => 
                array (size=3)
                'option' => string 'com_content' (length=11)
                'view' => string 'article' (length=7)
                'id' => string '261' (length=3)
   1 => 
      object(Joomla\CMS\Menu\MenuItem)[725]
      public 'id' => string '1545' (length=4)
      public 'menutype' => string 'global-navigation' (length=17)
      public 'title' => string 'In The Community' (length=16)
      public 'alias' => string 'community' (length=9)
      public 'note' => string '' (length=0)
      public 'route' => string 'education/community' (length=19)
      public 'link' => string 'index.php?option=com_content&view=article&id=262' (length=48)
      public 'type' => string 'component' (length=9)
      public 'level' => string '2' (length=1)
      public 'language' => string '*' (length=1)
      public 'browserNav' => string '0' (length=1)
      public 'access' => string '1' (length=1)
      protected 'params' => 
          object(Joomla\Registry\Registry)[1491]
          protected 'data' => 
              object(stdClass)[1494]
              ...
              protected 'initialized' => boolean true
              public 'separator' => string '.' (length=1)
              public 'home' => string '0' (length=1)
              public 'img' => string ' ' (length=1)
              public 'template_style_id' => string '0' (length=1)
              public 'component_id' => string '22' (length=2)
              public 'parent_id' => string '122' (length=3)
              public 'component' => string 'com_content' (length=11)
              public 'tree' => 
                  array (size=2)
                  0 => string '122' (length=3)
                  1 => string '1545' (length=4)
                  public 'query' => 
                      array (size=3)
                      'option' => string 'com_content' (length=11)
                      'view' => string 'article' (length=7)
                      'id' => string '262' (length=3)

Answer 1

If I'm correctly understanding what you're wanting to do, this code doesn't do it. I think you're wanting $hasNestedNav to be true when the active menu item has children, and what it's doing is actually setting $hasNestedNav true always (every menu item has a parent, the root items in every menu will have parent_id == 1).

If what you're wanting is a test for the existence of children of the current item, try this:

$menu = JFactory::getApplication()->getMenu()
$active = $menu->getActive();
$childCount = count($menu->getItems('parent_id', $active->id);

And then test $childCount to see if there are children of the active menu item. (Interesting side note: the return from the getItems call is an array of the child menu items, so you could stuff that into a variable if you wanted to do any further checking or filtering -- for example walking the array to filter out the menu items that have the parameter menu_show set to off (hides them from navigation menus) to keep them from counting towards the total.)

Obviously, this code isn't testing for the Bad Stuff that could happen if any of those calls fail, it's just the 'happy path' to the answer. I'll leave the error handling as an exercise for the reader.

Filtering

$children = $menu->getItems('parent_id', $active->id);
$visibleChildren = array_filter($children, function($child) {
    $params = $child->getParams();
    return ($params->get('menu_show', 1) === 1);
});

After which the array $visibleChildren will contain only the ones with "menu_show" set to 1. You can then count it to know if there are visible children.

Or, if this doesn't work on your version of PHP (or if it just seems like too much work) you could simply walk the $children array with a foreach and test each child's "menu_show" param, breaking out of the loop on the first occurrence of a "true" (after all, for your purposes how many there are doesn't matter, all you need to know is there is at least one visible child).