NavWalker/NavWalker.php at master · ThemePlate/NavWalker · GitHub

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<?php

/**
 * Clean Nav Walker
 *
 * @package ThemePlate
 * @since 0.1.0
 */

namespace ThemePlate;

use stdClass;
use Walker_Nav_Menu;
use WP_Post;

if ( ! class_exists( 'Walker_Nav_Menu' ) ) {
	return;
}

class NavWalker extends Walker_Nav_Menu {

	public const DEFAULTS = array(
		'sub-menu' => 'sub-menu',
		'has-sub'  => 'has-sub',
		'active'   => 'active',
		'item'     => '',
		'depth'    => '',
	);

	public array $classes = array();
	public int $priority  = 0;


	public function __construct() {

		$this->classes = array_merge( self::DEFAULTS, $this->classes );

		add_filter( 'nav_menu_submenu_css_class', array( $this, 'submenu_css_class' ), $this->priority, 3 );
		add_filter( 'nav_menu_css_class', array( $this, 'css_class' ), $this->priority, 4 );
		add_filter( 'nav_menu_item_id', array( $this, 'item_id' ), $this->priority, 4 );
		add_filter( 'nav_menu_link_attributes', array( $this, 'link_attributes' ), $this->priority, 4 );

	}


	public function submenu_css_class( array $classes, stdClass $args, int $depth ): array {

		if ( ! $args->walker instanceof $this ) {
			return $classes;
		}

		$classes = array( $this->classes['sub-menu'] );

		if ( ! empty( $this->classes['depth'] ) ) {
			$classes[] = $this->classes['depth'] . $depth;
		}

		return $classes;
	}

	public function css_class( array $classes, WP_Post $menu_item, stdClass $args, int $depth ): array {

		if ( ! $args->walker instanceof $this ) {
			return $classes;
		}

		$classes = array( $this->classes['item'] );

		if ( $args->walker->has_children ) {
			$classes[] = $this->classes['has-sub'];
		}

		if ( isset( $menu_item->current ) && $menu_item->current ) {
			$classes[] = $this->classes['active'];
		}

		if ( ! empty( $this->classes['depth'] ) ) {
			$classes[] = $this->classes['depth'] . $depth;
		}

		return array_filter( $classes );

	}


	public function item_id( string $menu_id, WP_Post $menu_item, stdClass $args, int $depth ): string {

		if ( ! $args->walker instanceof $this ) {
			return $menu_id;
		}

		if ( 'menu-item-' . $menu_item->ID === $menu_id ) {
			$menu_id = '';
		}

		return $menu_id;

	}


	public function link_attributes( array $atts, WP_Post $menu_item, stdClass $args, int $depth ): array {

		if ( ! $args->walker instanceof $this ) {
			return $atts;
		}

		if ( method_exists( $this, 'attributes' ) ) {
			$atts = array_merge( $atts, call_user_func_array( array( $this, 'attributes' ), func_get_args() ) );
		}

		return array_filter( $atts );

	}


	public static function fallback( $args ) {

		if ( ! current_user_can( 'edit_theme_options' ) ) {
			return false;
		}

		$output = '';

		if ( $args['container'] ) {
			$output .= '<' . $args['container'];

			if ( $args['container_id'] ) {
				$output .= ' id="' . $args['container_id'] . '"';
			}

			if ( $args['container_class'] ) {
				$output .= ' class="' . $args['container_class'] . '"';
			}

			$output .= '>';
		}

		$output .= '<ul';

		if ( $args['menu_id'] ) {
			$output .= ' id="' . $args['menu_id'] . '"';
		}

		if ( $args['menu_class'] ) {
			$output .= ' class="' . $args['menu_class'] . '"';
		}

		$output .= '>';
		$output .= '<li><a href="' . esc_url( admin_url( 'nav-menus.php' ) ) . '">Click here</a></li>';
		$output .= '<li><a href="' . esc_url( admin_url( 'nav-menus.php' ) ) . '">to add</a></li>';
		$output .= '<li><a href="' . esc_url( admin_url( 'nav-menus.php' ) ) . '">a menu</a></li>';
		$output .= '</ul>';

		if ( $args['container'] ) {
			$output .= '</' . $args['container'] . '>';
		}

		if ( $args['echo'] ) {
			echo $output; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
		} else {
			return $output;
		}

		return true;

	}

}