WordPress MultiSite and Genesis: Display a Network-Wide Menu Raw

wpms-genesis-network-menu.php

<?php

/* 
 * This code adds a network-wide menu in Genesis Header Right.
 * It can be altered to be in any location your heart desires.
 *
 * For this code to work, your main site and all sub-sites need to meet the following conditions:
 * 1) Register a menu with the same name on all themes used in network
 * 2) Create a menu via the Appearance menu on main site and sub-sites and assign it to the same location
 * 3) Leave the menu created in condition 2 blank on all sub-sites
 */

/*
 * STEP 1
 * 
 * Place this code in your themes' functions.php file
 */

// Unregister header-right widget area because we're going to replace it with our own
unregister_sidebar( 'header-right' );

/*
 * STEP 2
 * 
 * Place this code in your themes' functions.php file or a network-activated plugin.
 * It could also be in an mu-plugin only if all themes on the network are Genesis
 */

// Create desired theme menus
add_theme_support( 'genesis-menus', array(
	// adds a header menu, but you can name it what you want
	// this is the one I'm using as the network-wide menu
	// as long as this has the same name on all the themes, it satisfies condition 1
	'header' 	=> __( 'Header Navigation Menu', 'tcd' ),

	// the default Genesis menus
	'primary' 	=> __( 'Primary Navigation Menu', 'tcd' ), 
	'secondary' => __( 'Secondary Navigation Menu', 'tcd' ),
) );

// Only use this if your new menu isn't named 'header' (Genesis already does this for 'header')
// This adds the default genesis attributes to your menu (itemscope and itemtype)
// See genesis/lib/functions/markup.php, ~ line 420
add_filter( 'genesis_attr_nav-footer', 'genesis_attributes_nav' );

// Place the header menu in the header-right widget area
add_action( 'genesis_header_right', 'tcd_add_header_menu' );
function tcd_add_header_menu() {

	// do nothing if menu not supported
	if ( !genesis_nav_menu_supported( 'header' ) )
		return;

	// assign an extra class if using superfish
	$class = 'menu genesis-nav-menu menu-header';
	if ( genesis_superfish_enabled() ) {
		$class .= ' js-superfish';
	}

	// define the genesis_nav_menu parameters, including where to display it
	$args =  array( 'theme_location' => 'header', 'menu_class' => $class );

	// display main site's header menu on sub-sites
	if ( !is_main_site() ) {

		// switch to main site
		switch_to_blog(1);

		// display header menu from main site
		genesis_nav_menu( $args );

		// go back to displaying sub-site content
		restore_current_blog();
	}

	// display main site header menu
	genesis_nav_menu( $args );

}

// Remove the header menu option from sub-sites if not a super admin
add_action( 'admin_init', 'tcd_nav_menu_init' );
function tcd_nav_menu_init() {

	if ( !is_main_site() && !is_super_admin() )
		unregister_nav_menu( 'header' );

}

/*
 * OPTIONAL: STEP 3
 * 
 * This code gives your new menu Accessibility data, place it in the same file as you do the code in STEP 2
 * Modified from: https://gist.github.com/robincornett/7e6e4aa5317fd89e2cef#file-functions-02-php
 */

// Modify the array Genesis provides by adding ID and Aria-label
// Genesis already adds itemscope & itemtype for menus called primary, secondary, header
// For more info, see the genesis/lib/functions/markup.php file, ~ line 407
add_filter( 'genesis_attr_nav-header', 'tcd_modify_header_nav_attributes' );
function tcd_modify_header_nav_attributes( $attributes ) {

	// need this so skip link has a place to go
	$attributes['id'] = 'genesis-nav-header';

	// labels the navigation for screen readers
	$attributes['aria-label'] = __( 'Header Navigation', 'tcd' );
	return $attributes;

}

// Add support for accessibility functions
add_theme_support( 'genesis-accessibility', array( '404-page', 'drop-down-menu', 'headings', 'rems', 'search-form', 'skip-links' ) );

// Modify the skip links to include the header navigation
add_filter( 'genesis_skip_links_output', 'tcd_modify_skip_links' );
function tcd_modify_skip_links( $links ) {

	// Assign old array to a new one and indicate where new data will be in the array
	$add_links = $links;
	array_splice( $add_links, 0 ); // change the 0 to 1 for 2nd position, etc.

	// check to see if the theme supports and has a header menu
	if ( genesis_nav_menu_supported( 'header' ) && has_nav_menu( 'header' ) ) {
		// add the skip link ID and descriptive text to the array
		$add_links['genesis-nav-header'] = __( 'Skip to header navigation', 'tcd' );
	}

	// check to see if the theme supports and has a primary menu
	// only need to use this if array_splice position set to 0
	if ( genesis_nav_menu_supported( 'primary' ) && has_nav_menu( 'primary' ) ) {
		// the skip link ID and descriptive text to the array
		$add_links['genesis-nav-primary'] =  __( 'Skip to primary navigation', 'genesis' );
	}

	// return the modified skip link array
	return array_merge( $add_links, $links );

}

/* 
 * OPTIONAL: STEP 4
 *
 * Adds the new menu to the responsive menu
 * Place in same location as the code from STEP 2
 * Note: this uses the responsive menu script from the Genesis Sample Theme 2.3.0
 * This function is enqueued into your scripts (see Genesis Sample Theme)
 */

// Define responsive menu settings.
function tcd_responsive_menu_settings() {

	$settings = array(
		'mainMenu'          => __( 'Menu', 'tcd' ),
		'menuIconClass'     => 'dashicons-before dashicons-menu',
		'subMenu'           => __( 'Submenu', 'tcd' ),
		'subMenuIconsClass' => 'dashicons-before dashicons-arrow-down-alt2',
		'menuClasses'       => array(
			'combine' => array(
				// responsive menu visual order
				// skip links will only go to first one, since all menus merge into one
				'.nav-header',
				'.nav-primary',
				'.nav-secondary'
			),
			'others'  => array(),
		),
	);

	return $settings;

}