GC_Admin_Bar::add_node()

	public function add_node( $args ) {
		// Shim for old method signature: add_node( $parent_id, $menu_obj, $args ).
		if ( func_num_args() >= 3 && is_string( $args ) ) {
			$args = array_merge( array( 'parent' => $args ), func_get_arg( 2 ) );
		}

		if ( is_object( $args ) ) {
			$args = get_object_vars( $args );
		}

		// Ensure we have a valid title.
		if ( empty( $args['id'] ) ) {
			if ( empty( $args['title'] ) ) {
				return;
			}

			_doing_it_wrong( __METHOD__, __( 'The menu ID should not be empty.' ), '3.3.0' );
			// Deprecated: Generate an ID from the title.
			$args['id'] = esc_attr( sanitize_title( trim( $args['title'] ) ) );
		}

		$defaults = array(
			'id'     => false,
			'title'  => false,
			'parent' => false,
			'href'   => false,
			'group'  => false,
			'meta'   => array(),
		);

		// If the node already exists, keep any data that isn't provided.
		$maybe_defaults = $this->get_node( $args['id'] );
		if ( $maybe_defaults ) {
			$defaults = get_object_vars( $maybe_defaults );
		}

		// Do the same for 'meta' items.
		if ( ! empty( $defaults['meta'] ) && ! empty( $args['meta'] ) ) {
			$args['meta'] = gc_parse_args( $args['meta'], $defaults['meta'] );
		}

		$args = gc_parse_args( $args, $defaults );

		$back_compat_parents = array(
			'my-account-with-avatar' => array( 'my-account', '3.3' ),
			'my-blogs'               => array( 'my-sites', '3.3' ),
		);

		if ( isset( $back_compat_parents[ $args['parent'] ] ) ) {
			list( $new_parent, $version ) = $back_compat_parents[ $args['parent'] ];
			_deprecated_argument( __METHOD__, $version, sprintf( 'Use <code>%s</code> as the parent for the <code>%s</code> admin bar node instead of <code>%s</code>.', $new_parent, $args['id'], $args['parent'] ) );
			$args['parent'] = $new_parent;
		}

		$this->_set_node( $args );
	}

add_action( 'admin_bar_menu', 'add_links_to_admin_bar',999 );

function add_links_to_admin_bar($admin_bar) {         
          $args = array(
                'parent' => 'site-name',
                'id'     => 'media-libray',
                'title'  => 'Media Library',
                'href'   => esc_url( admin_url( 'upload.php' ) ),
                'meta'   => false
       		);
       	$admin_bar->add_node( $args );
       
        	$args = array(
        		'parent' => 'site-name',
        		'id'     => 'plugins',
        		'title'  => 'Plugins',
        		'href'   => esc_url( admin_url( 'plugins.php' ) ),
        		'meta'   => false
        	);
        $admin_bar->add_node( $args );
}

add_action( 'admin_bar_menu', 'add_top_link_to_admin_bar',999 );

function add_top_link_to_admin_bar($admin_bar) {
         // add a parent item
         	$args = array(
         		'id'    => 'custom',
         		'title' => 'Custom Made',
         		'href'   => 'http://example.com/', // Showing how to add an external link
         	);
         	$admin_bar->add_node( $args );
         	
         // add a child item to our parent item	
         	$args = array(
         		'parent' => 'custom',
         		'id'     => 'media-libray',
         		'title'  => 'Media Library',
         		'href'   => esc_url( admin_url( 'upload.php' ) ),
         		'meta'   => false		
         	);
         	$admin_bar->add_node( $args );
         	
         // add a child item to our parent item	
         	$args = array(
         		'parent' => 'custom',
         		'id'     => 'plugins',
         		'title'  => 'Plugins',
         		'href'   => esc_url( admin_url( 'plugins.php' ) ),
         		'meta'   => false		
         	);
         	$admin_bar->add_node( $args );     	         		 
}

/**
 * Adds a "My Page" link to the Toolbar.
 *
 * @param GC_Admin_Bar $gc_admin_bar Toolbar instance.
 */
function toolbar_link_to_mypage( $gc_admin_bar ) {
	$args = array(
		'id'    => 'my_page',
		'title' => __( 'My Page', 'textdomain' ),
		'href'  => 'http://mysite.com/my-page/',
		'meta'  => array(
			'class' => 'my-toolbar-page'
		)
	);
	$gc_admin_bar->add_node( $args );
}
add_action( 'admin_bar_menu', 'toolbar_link_to_mypage', 999 );

/**
 * Modifies the "Add New Post" Toolbar item to move it to the top-level.
 *
 * @param GC_Admin_Bar $gc_admin_bar Toolbar instance.
 */
function make_parent_node( $gc_admin_bar ) {
	$args = array(
		'id'     => 'new-post',                         // id of the existing child node (New > Post)
		'title'  => __( 'Add New Post', 'textdomain' ), // alter the title of existing node
		'parent' => false,                              // set parent to false to make it a top level (parent) node
	);
	$gc_admin_bar->add_node( $args );
}
add_action( 'admin_bar_menu', 'make_parent_node', 999 );

/**
 * Adds sorted social media links to the Toolbar.
 *
 * @param GC_Admin_Bar $gc_admin_bar Toolbar instance.
 */
function social_media_links( $gc_admin_bar ) {

	$args = array(
		'id'    => 'social_media',
		'title' => 'Social Media',
		'meta'  => array(
			'class' => 'first-toolbar-group'
		),
	);
	$gc_admin_bar->add_node( $args );	

	$args = array();

	array_push( $args,array(
		'id'     => 'twitter',
		'title'  => __( 'Twitter', 'textdomain' ),
		'href'   => 'http://www.twitter.com',
		'parent' => 'social_media',
	) );
	
	array_push( $args,array(
		'id'     => 'youtube',
		'title'  => __( 'YouTube', 'textdomain' ),
		'href'   => 'http://www.YouTube.com',
		'parent' => 'social_media',
		'meta'   => array(
			'class' => 'first-toolbar-group'
		),
	) );

	array_push( $args,array(
		'id'     => 'fb',
		'title'  => __( 'Facebook', 'textdomain' ),
		'href'   => 'http://www.facebook.com',
		'parent' => 'social_media',
	) );
	
	sort( $args );

	for ( $a=0; $a < sizeOf( $args ); $a++ ) {
		$gc_admin_bar->add_node( $args[ $a ] );
	}
} 

add_action('gc_before_admin_bar_render', 'baw_admin_bar_render', 100);

/**
 * Adds admin bar items for easy access to the theme creator and editor
 */
function baw_admin_bar_render() {
    baw_admin_bar_render_item( 'BAW' ); // Parent item
    baw_admin_bar_render_item('BAW Sub1', 'some_link_to_the_settings', 'BAW');
    baw_admin_bar_render_item('BAW Sub2', 'some_link_to_the_settings', 'BAW');
}

/**
 * Adds menu parent or submenu item.
 *
 * @param string $name        The menu item label.
 * @param string $href        Optional. The link to the item (settings page or ext site). Default empty.
 * @param string $parent      Optional. Parent label (if creating a submenu item). Default empty.
 * @param array  $custom_meta Optional. Custom meta to include for the rendered item. Default empty array.
 *
 * @global GC_Admin_Bar $gc_admin_bar Toolbar instance.
 */
function baw_admin_bar_render_item( $name, $href = '', $parent = '', $custom_meta = array() ) {
    global $gc_admin_bar;

	if ( ! is_super_admin()
		 || ! is_object( $gc_admin_bar ) 
		 || ! function_exists( 'is_admin_bar_showing' ) 
		 || ! is_admin_bar_showing()
	 ) {
		return;
	}

    // Generate ID based on the current filename and the name supplied.
    $id = sanitize_key( basename( __FILE__, '.php' ) . '-' . $name );

    // Generate the ID of the parent.
    $parent = sanitize_key( basename( __FILE__, '.php' ) . '-' . $parent );

    // Links from the current host will open in the current window

    $meta = strpos( $href, site_url() ) !== false ? array() : array( 'target' => '_blank' ); // external links open in new tab/window
    $meta = array_merge( $meta, $custom_meta );

    $gc_admin_bar->add_node( array(
        'parent' => $parent,
        'id'     => $id,
        'title'  => $name,
        'href'   => $href,
        'meta'   => $meta,
    ) );
}