Wie kann ich WooCommerce-Produktkäufe basierend auf früheren Käufen einschränken?

function has_bought_items() {
    $bought = false;

    $prod_arr = array( '21', '67' );

    $customer_orders = get_posts( array(
        'numberposts' => -1,
        'meta_key'    => '_customer_user',
        'meta_value'  => get_current_user_id(),
        'post_type'   => 'shop_order',
        'post_status' => 'wc-completed'
    ) );
    foreach ( $customer_orders as $customer_order ) {
        $order_id = method_exists( $order, 'get_id' ) ? $order->get_id() : $order->id;
        $order = wc_get_order( $customer_order );

        foreach ($order->get_items() as $item) {
            if ( version_compare( WC_VERSION, '3.0', '<' ) ) 
                $product_id = $item['product_id'];
            else
                $product_id = $item->get_product_id();

            if ( in_array( $product_id, $prod_arr ) ) 
                $bought = true;
        }
    }

    return $bought;
}

$restricted_products = array( '20', '32', '75' );
$product_id = method_exists( $product, 'get_id' ) ? $product->get_id() : $product->id;

if ( !has_bought_items() && in_array( $product_id, $restricted_products ) ) { 
    // Display inactive add-to-cart button
} else { 
    // Display normal add-to-cart button
}