walker.php

<?php

namespace App\Walker;

use Roots\Soil\Nav\NavWalker as Soil;

/**
 * Return if Soil does not exist.
 */
if (!class_exists('Roots\Soil\Nav\NavWalker')) {
    return;
}

/**
 * Navigation
 */
class Navigation extends Soil
{
    public function __construct()
    {
        parent::__construct();
        remove_filter('nav_menu_css_class', [$this, 'cssClasses'], 10);
        add_filter('nav_menu_css_class', [$this, 'itemClasses'], 10, 4);
    }

    /**
     * @param string $output
     * @param int $depth
     * @param array $args
     * @SuppressWarnings(PHPMD.CamelCaseMethodName) This method overrides its parent
     * @SuppressWarnings(PHPMD.UnusedFormalParameter) This method overrides its parent
     */
    // @codingStandardsIgnoreLine
    public function start_lvl(&$output, $depth = 0, $args = [])
    {
        // Depth
        $indent = ($depth ? str_repeat("\t", $depth) : '');

        // Class
        $class = ($depth == 1 ? '' : 'navbar-dropdown');

        // Output
        $output .= $indent . '<ul class="' . $class . '">';
    }

    /**
     * @param $classes
     * @param $item
     * @param $args
     * @param $depth
     * @return array
     * @SuppressWarnings(PHPMD.UnusedFormalParameter) This method overrides its parent
     */
    public function itemClasses($classes, $item, /** @noinspection PhpUnusedParameterInspection */ $args, $depth)
    {
        return array_filter(array_map(function ($class) use ($depth, $args) {
            switch ($class) {
                case 'menu-item-has-children':
                    return 'has-dropdown is-hoverable';
                case 'menu-item':
                    return $args->theme_location == 'primary_navigation' ? 'navbar-item' : $class;
                default:
                    return $class;
            }
        }, parent::cssClasses($classes, $item)));
    }
}