Walker Nav with Drawer

gistfile1.txt

<?php
/**
 * Cleaner walker for wp_nav_menu()
 *
 * Walker_Nav_Menu (WordPress default) example output:
 *   <li id="menu-item-8" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-8"><a href="/">Home</a></li>
 *   <li id="menu-item-9" class="menu-item menu-item-type-post_type menu-item-object-page menu-item-9"><a href="/sample-page/">Sample Page</a></l
 *
 * Roots_Nav_Walker example output:
 *   <li class="menu-home"><a href="/">Home</a></li>
 *   <li class="menu-sample-page"><a href="/sample-page/">Sample Page</a></li>
 */
class Roots_Nav_Walker extends Walker_Nav_Menu {

	private $parent_ID;
	private $locations;
	private $menu;
	private $menu_items;

	function check_current($classes) {
		return preg_match('/(current[-_])|active|dropdown/', $classes);
	}

	function start_lvl( &$output, $depth = 0, $args = array() ) {
		$output .= "\n<ul class=\"dropdown-menu\"> \n<div class=\"container\"> \n<div class=\"row\">\n";
	}

	function end_lvl( &$output, $depth = 0, $args = array() ) {
		$output .= "\n</div> \n</div> \n</ul> \n";
	}

	function start_el(&$output, $item, $depth = 0, $args = array(), $id = 0) {
		$item_html = '';
		parent::start_el($item_html, $item, $depth, $args);

		if ($item->is_dropdown && ($depth === 0)) {
			$this->parent_ID = $item->ID;
			$item_html = str_replace('<a', '<a class="dropdown-toggle" data-toggle="dropdown" data-target="#"', $item_html);
		}
		elseif ($depth === 1) {
			if ( ! $this->locations)
				$this->locations = get_nav_menu_locations();
			if ( ! $this->menu)
				$this->menu = wp_get_nav_menu_object( $this->locations['primary_navigation'] );
			if ( ! $this->menu_items )
				$this->menu_items = wp_get_nav_menu_items( $this->menu->term_id );

			$count = 0;
			foreach ( $this->menu_items as $menu_item )
				if ( $menu_item->menu_item_parent == $this->parent_ID )
					$count ++;

			$column = 12 / $count;

			$item_html = str_replace('<li class="', "<li class=\"col-sm-{$column} ", $item_html);
			$item_html = str_replace('<a', "<a class='title'", $item_html);

			$hook_title = str_replace( ' ', '_', strtolower( $item->title ) );
			$item_html = apply_filters(  "{$hook_title}_nav_menu", $item_html );
		}
		elseif (stristr($item_html, 'li class="divider')) {
			$item_html = preg_replace('/<a[^>]*>.*?<\/a>/iU', '', $item_html);
		}
		elseif (stristr($item_html, 'li class="dropdown-header')) {
			$item_html = preg_replace('/<a[^>]*>(.*)<\/a>/iU', '$1', $item_html);
		}

		$item_html = apply_filters('roots/wp_nav_menu_item', $item_html);
		$output .= $item_html;
	}

	function display_element($element, &$children_elements, $max_depth, $depth = 0, $args, &$output) {
		$element->is_dropdown = ((!empty($children_elements[$element->ID]) && (($depth + 1) < $max_depth || ($max_depth === 0))));

		if ($element->is_dropdown) {
			$element->classes[] = 'dropdown';
		}

		parent::display_element($element, $children_elements, $max_depth, $depth, $args, $output);
	}
}

/**
 * Remove the id="" on nav menu items
 * Return 'menu-slug' for nav menu classes
 */
function roots_nav_menu_css_class($classes, $item) {
	$slug = sanitize_title($item->title);
	$classes = preg_replace('/(current(-menu-|[-_]page[-_])(item|parent|ancestor))/', 'active', $classes);
	$classes = preg_replace('/^((menu|page)[-_\w+]+)+/', '', $classes);

	$classes[] = 'menu-' . $slug;

	$classes = array_unique($classes);

	return array_filter($classes, 'is_element_empty');
}
add_filter('nav_menu_css_class', 'roots_nav_menu_css_class', 10, 2);
add_filter('nav_menu_item_id', '__return_null');

/**
 * Clean up wp_nav_menu_args
 *
 * Remove the container
 * Use Roots_Nav_Walker() by default
 */
function roots_nav_menu_args($args = '') {
	$roots_nav_menu_args['container'] = false;

	if (!$args['items_wrap']) {
		$roots_nav_menu_args['items_wrap'] = '<ul class="%2$s">%3$s</ul>';
	}

	if (!$args['depth']) {
		$roots_nav_menu_args['depth'] = 2;
	}

	// No Bootstrap dropdowns in footer
	if (isset($args['menu']->slug) && $args['menu']->slug === 'footer') {
		$args['walker'] = new Walker_Nav_Menu();
	}
	if (!$args['walker']) {
		$roots_nav_menu_args['walker'] = new Roots_Nav_Walker();
	}

	return array_merge($args, $roots_nav_menu_args);
}
add_filter('wp_nav_menu_args', 'roots_nav_menu_args');

add_filter( 'workouts_nav_menu', function ( $item_html ) {
	global $competitor;
	$term_title    = 'train-tags';
	$featured_post = $competitor->featured;
	ob_start();
	include dirname(__FILE__) . '/views/terms_widget.php';
	wp_reset_query();
	$competitor->featured->rewind_posts();
	return $item_html . ob_get_clean();
});

add_filter( 'fitness_tips_nav_menu', function ( $item_html ) {
	global $competitor;
	$widget_posts = $competitor->fitness_tips_nav;
	ob_start();
	include dirname(__FILE__) . '/views/posts_widget.php';
	wp_reset_query();
	$competitor->fitness_tips_nav->rewind_posts();
	return $item_html . ob_get_clean();
});

add_filter( 'recipes_nav_menu', function ( $item_html ) {
	global $competitor;
	$term_title    = 'recipe-tags';
	$featured_post = $competitor->recipes;
	ob_start();
	include dirname(__FILE__) . '/views/terms_widget.php';
	wp_reset_query();
	$competitor->recipes->rewind_posts();
	return $item_html . ob_get_clean();
});

add_filter( 'healthy_eating_tips_nav_menu', function ( $item_html ) {
	global $competitor;
	$widget_posts = $competitor->health_tips_nav;
	ob_start();
	include dirname(__FILE__) . '/views/posts_widget.php';
	wp_reset_query();
	$competitor->health_tips_nav->rewind_posts();
	return $item_html . ob_get_clean();
});