Product bundles v6.4.0 Min/Max Items compatibility

add_filter('wcfm_product_bundles_general_fields', function($fields) {
    global $WCFMph, $wp;
    if( version_compare( $WCFMph->version, '1.0.8', '<=' ) && version_compare( WC_PB()->plugin_version(), '6.4.0', '>=' )) {
        $min_qty_limit = '';
        $max_qty_limit = '';
        if(!empty( $wp->query_vars['wcfm-products-manage'] )) {
            $product_id = $wp->query_vars['wcfm-products-manage'];
            $min_qty_limit = get_post_meta( $product_id, '_wcpb_min_qty_limit', true );
            $max_qty_limit = get_post_meta( $product_id, '_wcpb_max_qty_limit', true );
        }
        $min_max_fields = array(
            "_wcpb_min_qty_limit" => array( 'label' => __( 'Min Bundle Size', 'woocommerce-product-bundles-min-max-items' ), 'type' => 'number', 'value' => $min_qty_limit, 'class' => 'wcfm-text', 'label_class' => 'wcfm_title', 'hints' => __( 'Minimum required quantity of bundled items.', 'woocommerce-product-bundles' ) ),
            "_wcpb_max_qty_limit" => array( 'label' => __( 'Max Bundle Size', 'woocommerce-product-bundles-min-max-items' ), 'type' => 'number', 'value' => $max_qty_limit, 'class' => 'wcfm-text', 'label_class' => 'wcfm_title', 'hints' => __( 'Maximum allowed quantity of bundled items.', 'woocommerce-product-bundles-min-max-items' ) ),
        );
        $index = array_search( "_wc_pb_group_mode", array_keys( $fields ) ) + 1;
        return array_slice( $fields, 0, $index, true ) +
            $min_max_fields +
            array_slice( $fields, $index, count( $fields ) - 1, true );

    }
    return $fields;
});
add_action( 'after_wcfm_products_manage_meta_save', function($new_product_id, $wcfm_products_manage_form_data) {
    global $WCFMph;
    $product_type = empty( $wcfm_products_manage_form_data['product_type'] ) ? WC_Product_Factory::get_product_type( $new_product_id ) : sanitize_title( stripslashes( $wcfm_products_manage_form_data['product_type'] ) );
    if ( $product_type != 'bundle' ) {
        return;
    }
    $product = wc_get_product( $new_product_id );
    if( version_compare( $WCFMph->version, '1.0.8', '<=' ) && version_compare( WC_PB()->plugin_version(), '6.4.0', '>=' )) {
        if ( ! empty( $wcfm_products_manage_form_data[ '_wcpb_min_qty_limit' ] ) && is_numeric( $wcfm_products_manage_form_data[ '_wcpb_min_qty_limit' ] ) ) {
            $product->add_meta_data( '_wcpb_min_qty_limit', stripslashes( $wcfm_products_manage_form_data[ '_wcpb_min_qty_limit' ] ), true );
        } else {
            $product->delete_meta_data( '_wcpb_min_qty_limit' );
        }

        if ( ! empty( $wcfm_products_manage_form_data[ '_wcpb_max_qty_limit' ] ) && is_numeric( $wcfm_products_manage_form_data[ '_wcpb_max_qty_limit' ] ) ) {
            $product->add_meta_data( '_wcpb_max_qty_limit', stripslashes( $wcfm_products_manage_form_data[ '_wcpb_max_qty_limit' ] ), true );
        } else {
            $product->delete_meta_data( '_wcpb_max_qty_limit' );
        }
        $product->save();
    }
}, 91, 2 );