ACF JSON Menu Import

if( function_exists('acf_add_options_page') ) {

    acf_add_options_page();

}

// // 1. Register ACF Field for Menu JSON

add_action('acf/init', function() {

    if( function_exists('acf_add_local_field_group') ) {

        acf_add_local_field_group(array(

            'key' => 'group_menu_json_import',

            'title' => 'Menu Import',

            'fields' => array(

                array(

                    'key' => 'field_menu_json',

                    'label' => 'Menu JSON',

                    'name' => 'menu_json',

                    'type' => class_exists('ACF_Field_Code') ? 'code' : 'textarea',

                    'instructions' => 'Paste your JSON menu structure here.',

                    'rows' => 10,

                    'new_lines' => '', // No automatic formatting

                ),

            ),

            'location' => array(

                array(

                    array(

                        'param' => 'options_page',

                        'operator' => '==',

                        'value' => 'acf-options', // Default options page

                    ),

                ),

            ),

        ));

    }

});

// 2. Hook into Save to Process the JSON and Build the Menu

add_action('acf/save_post', 'import_menu_from_acf_json', 20);

function import_menu_from_acf_json($post_id) {

    // Run only on options page

    if ($post_id !== 'options') return;

    $json_string = get_field('menu_json', 'option');

    if (!$json_string) return;

    $data = json_decode($json_string, true);

    if (json_last_error() !== JSON_ERROR_NONE || !is_array($data)) {

        error_log('Invalid JSON in Menu JSON ACF field.');

        return;

    }

    if (!isset($data['menu_name'], $data['menu_items']) || !is_array($data['menu_items'])) return;

    $menu = wp_get_nav_menu_object($data['menu_name']);

    if (!$menu) {

        $menu_id = wp_create_nav_menu($data['menu_name']);

    } else {

        $menu_id = $menu->term_id;

    }

    // Delete existing items (optional but helpful for clean re-imports)

    $items = wp_get_nav_menu_items($menu_id);

    if ($items) {

        foreach ($items as $item) {

            wp_delete_post($item->ID, true);

        }

    }

    $item_ids = [];

    foreach ($data['menu_items'] as $item) {

        $parent_id = 0;

        if (!empty($item['menu_item_parent']) && isset($item_ids[$item['menu_item_parent']])) {

            $parent_id = $item_ids[$item['menu_item_parent']];

        }

        $item_id = wp_update_nav_menu_item($menu_id, 0, [

            'menu-item-title' => $item['title'],

            'menu-item-url' => $item['url'],

            'menu-item-status' => 'publish',

            'menu-item-parent-id' => $parent_id,

        ]);

        $item_ids[$item['title']] = $item_id;

    }

    // Optional: Assign to menu location (adjust slug to match your theme)

    $locations = get_theme_mod('nav_menu_locations');

    $locations['primary'] = $menu_id;

    set_theme_mod('nav_menu_locations', $locations);

}