WooNooW/includes/Admin/Menu.php

<?php
namespace WooNooW\Admin;

class Menu {
    public static function init() {
        add_action('admin_menu', [__CLASS__, 'register']);
        // After all plugins/themes add their menus, collect Woo menus for SPA
        add_action('admin_head', [__CLASS__, 'localize_wc_menus'], 999);
    }
    public static function register() {
        add_menu_page(
            'WooNooW',
            'WooNooW',
            'manage_woocommerce',
            'woonoow',
            [__CLASS__, 'render'],
            'dashicons-store',
            55
        );
    }
    public static function render() {
        echo '<div id="woonoow-admin-app" class="wrap"></div>';
    }
    /**
     * Collect all WooCommerce-related admin menus (including add-ons) and expose to SPA via window.WNW_WC_MENUS.
     */
    public static function localize_wc_menus() : void {
        // Ensure we're in admin and script handle exists later; safe to call regardless
        global $menu, $submenu;
        if ( ! is_array( $menu ) ) return;

        $items = [];
        $seen  = [];
        $is_wc_slug = static function(string $slug) : bool {
            $s = strtolower($slug);
            return (
                strpos($s, 'woocommerce') !== false ||
                strpos($s, 'wc-admin') !== false ||
                strpos($s, 'wc-') === 0 ||
                strpos($s, 'edit.php?post_type=product') !== false ||
                strpos($s, 'edit.php?post_type=shop_order') !== false ||
                strpos($s, 'edit.php?post_type=shop_coupon') !== false
            );
        };

        foreach ( $menu as $m ) {
            // $m: [0] title, [1] cap, [2] slug, [3] page_title, [4] class, [5] id, [6] icon, [7] position
            if ( ! isset( $m[2] ) || ! is_string( $m[2] ) ) continue;
            $slug = (string) $m[2];
            if ( ! $is_wc_slug( $slug ) ) continue;

            $title = wp_strip_all_tags( (string) ($m[0] ?? $m[3] ?? 'Woo') );
            $key   = md5( $slug . '|' . $title );
            if ( isset($seen[$key]) ) continue;
            $seen[$key] = true;

            $children = [];
            if ( isset($submenu[$slug]) && is_array($submenu[$slug]) ) {
                foreach ( $submenu[$slug] as $sm ) {
                    // $sm: [0] title, [1] cap, [2] slug
                    $childTitle = wp_strip_all_tags( (string) ($sm[0] ?? '') );
                    $childSlug  = (string) ($sm[2] ?? '' );
                    if ( $childSlug === '' ) continue;
                    $children[] = [
                        'key'   => md5( $childSlug . '|' . $childTitle ),
                        'title' => $childTitle,
                        'href'  => admin_url( $childSlug ),
                        'slug'  => $childSlug,
                    ];
                }
            }

            $items[] = [
                'key'      => $key,
                'title'    => $title,
                'href'     => admin_url( $slug ),
                'slug'     => $slug,
                'children' => $children,
            ];
        }

        // Attach to both possible script handles (dev/prod)
        foreach ( [ 'wnw-admin-dev-config', 'wnw-admin' ] as $handle ) {
            if ( wp_script_is( $handle, 'enqueued' ) || wp_script_is( $handle, 'registered' ) ) {
                wp_localize_script( $handle, 'WNW_WC_MENUS', [ 'items' => $items ] );
                wp_add_inline_script( $handle, 'window.WNW_WC_MENUS = window.WNW_WC_MENUS || WNW_WC_MENUS;', 'after' );
            }
        }
        // Absolute last resort: inject a tiny inline if no handle was matched (e.g., race condition)
        if ( ! isset( $GLOBALS['wp_scripts']->registered['wnw-admin'] ) && ! isset( $GLOBALS['wp_scripts']->registered['wnw-admin-dev-config'] ) ) {
            printf( '<script>window.WNW_WC_MENUS = window.WNW_WC_MENUS || %s;</script>', wp_json_encode( [ 'items' => $items ] ) );
        }
    }

}