WWPP – Customize the admin “New Order” email subject for wholesalers v1.1

/**

 * Customize the Admin "New Order" email subject using Wholesale Prices Premium logic

 */

add_filter( 'woocommerce_email_subject_new_order', function( $subject, $order ) {

    if ( ! $order ) {

        return $subject;

    }

    // Access the Wholesale Prices Premium global object

    global $wc_wholesale_prices_premium;

    // Get the customer ID from the order

    $customer_id = $order->get_customer_id();

    if ( ! $customer_id ) {

        return $subject;

    }

    // Use WWPP logic to find the customer's wholesale role

    $user_wholesale_role = $wc_wholesale_prices_premium->wwpp_wholesale_roles->getUserWholesaleRole( $customer_id );

    // If the customer has any wholesale role assigned

    if ( ! empty( $user_wholesale_role ) ) {

        // Returns: [{site_title}]: New Wholesale order #{order_number}

        return '[' . get_bloginfo( 'name' ) . ']: New Wholesale order #' . $order->get_order_number();

    }

    return $subject;

}, 10, 2 );