Notificar por email el cambio de dirección de un cliente de WooCommerce

Es un problema recurrente en WooCommerce de suscripciones. El cliente cambia de dirección y puede que nuestra etiqueta generada no sea válida o que la facturación lo realicemos con un programa externo. Por lo que se necesita un método para de ser notificado cuando cliente cambie su dirección. Aquí es donde entran en juego esos increíbles ganchos de WooCommerce. 

Modifico el Plugin de Patrick para enviar los datos de Envío y Facturación. El plugin original tiene un problema, envía los datos anteriores, no lo modificados. El código publicado a continuación corrige ese error. Además se le han añadido más campos. Solo lo tienes que crear dentro de /mu-plugins un fichero llamado woo-change-adress.php pegar el siguiente contenido:

<?php
/**
 * Plugin Name: WooCommerce Email Customer Address
 * Plugin URI: https://gist.github.com/BFTrick/7891074
 * Description: Email the site admin when a customer changes their address
 * Author: Patrick Rauland
 * Author URI: http://patrickrauland.com/
 * Version: 1.0.1
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * @author    	Patrick Rauland
 * @since		1.0
 */
 
function patricks_email_customer_address( $user_id ) {
	
	global $current_user;

	// get user data
	get_currentuserinfo();

	// get shipping data
	$shipping_address = patricks_get_formatted_shipping_address();

	// get admin email
	$email = get_option( 'admin_email', '' );
	$subject = "Cambio de datos de suscriptor";

	// format email
	$message = 'Usuario: ' . $current_user->user_login . "\n";
	$message .= 'Email: ' . $current_user->user_email . "\n";
	$message .= 'Nombre: ' . $current_user->user_firstname . "\n";
	$message .= 'Apellidos: ' . $current_user->user_lastname . "\n";
	$message .= "\n";
	$message .= "\n";
	$message .= 'CAMBIOS REALIZADOS: ' . $shipping_address . "\n";

	// make sure we have all of the required data
	if ( empty ( $email ) ) {
		return;
	}

	// send email
	wp_mail( $email, $subject, $message );

}
add_action( 'woocommerce_customer_save_address', 'patricks_email_customer_address', 20 );


function patricks_get_formatted_shipping_address() {
	global $woocommerce;

	// get the data from the profile after it's set by the customer save
$curr_user      = wp_get_current_user();
$user_id        = $curr_user->ID;
//$woocommerce->customer->set_default_data();

//Shipping Address
$address .= "\n";
$address .= "DIRECCIÓN DE ENVÍO:\n";
$address .= get_user_meta( $user_id, 'shipping_address_1', true );//$woocommerce->customer->get_shipping_address();
$address .= "\n";
if(!empty(get_user_meta( $user_id, 'shipping_address_2', true ))){
	$address .= get_user_meta( $user_id, 'shipping_address_2', true );//$woocommerce->customer->get_shipping_address_2();
	$address .= "\n";
};	
$address .= get_user_meta( $user_id, 'shipping_city', true );//$woocommerce->customer->get_shipping_city();
$address .= " ";
$address .= get_user_meta( $user_id, 'shipping_state', true );//$woocommerce->customer->get_shipping_state();
$address .= ", ";
$address .= get_user_meta( $user_id, 'shipping_postcode', true );//$woocommerce->customer->get_shipping_postcode();
$address .= "\n";
$address .= get_user_meta( $user_id, 'shipping_country', true );//$woocommerce->customer->get_shipping_country();
$address .= "\n";
$address .= get_user_meta( $user_id, 'shipping_company', true );
$address .= "\n";
$address .= get_user_meta( $user_id, 'shipping_phone', true );
$address .= "\n";
$address .= get_user_meta( $user_id, 'shipping_email', true );
$address .= "\n";

//billing Address
$address .= "\n";
$address .= "DIRECCIÓN DE FACTURACIÓN:\n";
$address .= get_user_meta( $user_id, 'billing_address_1', true );//$woocommerce->customer->get_billing_address();
$address .= "\n";
if(!empty(get_user_meta( $user_id, 'billing_address_2', true ))){
	$address .= get_user_meta( $user_id, 'billing_address_2', true );//$woocommerce->customer->get_billing_address_2();
	$address .= "\n";
};	
$address .= get_user_meta( $user_id, 'billing_city', true );//$woocommerce->customer->get_billing_city();
$address .= " ";
$address .= get_user_meta( $user_id, 'billing_state', true );//$woocommerce->customer->get_billing_state();
$address .= ", ";
$address .= get_user_meta( $user_id, 'billing_postcode', true );//$woocommerce->customer->get_billing_postcode();
$address .= "\n";
$address .= get_user_meta( $user_id, 'billing_country', true );//$woocommerce->customer->get_billing_country();
$address .= "\n";
$address .= get_user_meta( $user_id, 'billing_company', true );
$address .= "\n";
$address .= get_user_meta( $user_id, 'billing_phone', true );
$address .= "\n";
$address .= get_user_meta( $user_id, 'billing_email', true );
return $address;
}
// That's all folks!