<?php

class PZY_Menu_Walker extends \Walker_Nav_Menu
{
    public function start_el( &$output, $data_object, $depth = 0, $args = null, $current_object_id = 0 ) {
        // Restores the more descriptive, specific name for use within this method.
        $menu_item = $data_object;

        if ( isset( $args->item_spacing ) && 'discard' === $args->item_spacing ) {
            $t = '';
            $n = '';
        } else {
            $t = "\t";
            $n = "\n";
        }
        $indent = ( $depth ) ? str_repeat( $t, $depth ) : '';

        $classes   = empty( $menu_item->classes ) ? array() : (array) $menu_item->classes;
        $classes[] = 'menu-item-' . $menu_item->ID;

        /**
         * Filters the arguments for a single nav menu item.
         *
         * @since 4.4.0
         *
         * @param stdClass $args      An object of wp_nav_menu() arguments.
         * @param WP_Post  $menu_item Menu item data object.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $args = apply_filters( 'nav_menu_item_args', $args, $menu_item, $depth );

        /**
         * Filters the CSS classes applied to a menu item's list item element.
         *
         * @since 3.0.0
         * @since 4.1.0 The `$depth` parameter was added.
         *
         * @param string[] $classes   Array of the CSS classes that are applied to the menu item's `<li>` element.
         * @param WP_Post  $menu_item The current menu item object.
         * @param stdClass $args      An object of wp_nav_menu() arguments.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $class_names = implode( ' ', apply_filters( 'nav_menu_css_class', array_filter( $classes ), $menu_item, $args, $depth ) );

        /**
         * Filters the ID attribute applied to a menu item's list item element.
         *
         * @since 3.0.1
         * @since 4.1.0 The `$depth` parameter was added.
         *
         * @param string   $menu_item_id The ID attribute applied to the menu item's `<li>` element.
         * @param WP_Post  $menu_item    The current menu item.
         * @param stdClass $args         An object of wp_nav_menu() arguments.
         * @param int      $depth        Depth of menu item. Used for padding.
         */
        $id = apply_filters( 'nav_menu_item_id', 'menu-item-' . $menu_item->ID, $menu_item, $args, $depth );

        $li_atts          = array();
        $li_atts['id']    = ! empty( $id ) ? $id : '';
        $li_atts['class'] = ! empty( $class_names ) ? $class_names : '';

        /**
         * Filters the HTML attributes applied to a menu's list item element.
         *
         * @since 6.3.0
         *
         * @param array $li_atts {
         *     The HTML attributes applied to the menu item's `<li>` element, empty strings are ignored.
         *
         *     @type string $class        HTML CSS class attribute.
         *     @type string $id           HTML id attribute.
         * }
         * @param WP_Post  $menu_item The current menu item object.
         * @param stdClass $args      An object of wp_nav_menu() arguments.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $li_atts       = apply_filters( 'nav_menu_item_attributes', $li_atts, $menu_item, $args, $depth );
        $li_attributes = $this->build_atts( $li_atts );

        $output .= $indent . '<li' . $li_attributes . '>';

        $atts           = array();
        $atts['title']  = ! empty( $menu_item->attr_title ) ? $menu_item->attr_title : '';
        $atts['target'] = ! empty( $menu_item->target ) ? $menu_item->target : '';
        if ( '_blank' === $menu_item->target && empty( $menu_item->xfn ) ) {
            $atts['rel'] = 'noopener';
        } else {
            $atts['rel'] = $menu_item->xfn;
        }

        if ( ! empty( $menu_item->url ) ) {
            if ( get_privacy_policy_url() === $menu_item->url ) {
                $atts['rel'] = empty( $atts['rel'] ) ? 'privacy-policy' : $atts['rel'] . ' privacy-policy';
            }

            $atts['href'] = $menu_item->url;
        } else {
            $atts['href'] = '';
        }

        $atts['aria-current'] = $menu_item->current ? 'page' : '';

        /**
         * Filters the HTML attributes applied to a menu item's anchor element.
         *
         * @since 3.6.0
         * @since 4.1.0 The `$depth` parameter was added.
         *
         * @param array $atts {
         *     The HTML attributes applied to the menu item's `<a>` element, empty strings are ignored.
         *
         *     @type string $title        Title attribute.
         *     @type string $target       Target attribute.
         *     @type string $rel          The rel attribute.
         *     @type string $href         The href attribute.
         *     @type string $aria-current The aria-current attribute.
         * }
         * @param WP_Post  $menu_item The current menu item object.
         * @param stdClass $args      An object of wp_nav_menu() arguments.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $atts       = apply_filters( 'nav_menu_link_attributes', $atts, $menu_item, $args, $depth );
        $attributes = $this->build_atts( $atts );

        /** This filter is documented in wp-includes/post-template.php */
        $title = apply_filters( 'the_title', $menu_item->title, $menu_item->ID );

        /**
         * Filters a menu item's title.
         *
         * @since 4.4.0
         *
         * @param string   $title     The menu item's title.
         * @param WP_Post  $menu_item The current menu item object.
         * @param stdClass $args      An object of wp_nav_menu() arguments.
         * @param int      $depth     Depth of menu item. Used for padding.
         */
        $title = apply_filters( 'nav_menu_item_title', $title, $menu_item, $args, $depth );

        $item_output  = $args->before;
        $item_output .= '<a' . $attributes . '>';
        $item_output .= $args->link_before . $title . $args->link_after;
        /* add toggle icon */
        if ($depth>0){
            $item_output .= '<i data-feather="chevron-left" class="has-children"></i>';
        }
        /* add toggle icon */
        $item_output .= '</a>';
        $item_output .= $args->after;


        /**
         * Filters a menu item's starting output.
         *
         * The menu item's starting output only includes `$args->before`, the opening `<a>`,
         * the menu item's title, the closing `</a>`, and `$args->after`. Currently, there is
         * no filter for modifying the opening and closing `<li>` for a menu item.
         *
         * @since 3.0.0
         *
         * @param string   $item_output The menu item's starting HTML output.
         * @param WP_Post  $menu_item   Menu item data object.
         * @param int      $depth       Depth of menu item. Used for padding.
         * @param stdClass $args        An object of wp_nav_menu() arguments.
         */
        $output .= apply_filters( 'walker_nav_menu_start_el', $item_output, $menu_item, $depth, $args );

    }
}