/**
  * @param int[] $params Deleted contact_id
  * @see waEventHandler::execute()
  * @return void
  */
 public function execute(&$params)
 {
     $contact_ids = $params;
     // We need some info about (not yet) deleted contacts to save into order params.
     // The idea is to pretend that orders were created by guests with no auth.
     $c = new waContactsCollection('id/' . implode(',', $contact_ids));
     $contacts = $c->getContacts('name,phone,email');
     foreach ($contacts as &$contact) {
         if (is_array($contact['phone'])) {
             $phone = reset($contact['phone']);
             if (is_array($phone)) {
                 if (isset($phone['value'])) {
                     $phone = $phone['value'];
                 } else {
                     $phone = '';
                 }
             }
             $contact['phone'] = $phone;
         }
         if (is_array($contact['email'])) {
             $email = reset($contact['email']);
             $contact['email'] = $email;
         }
     }
     $order_model = new shopOrderModel();
     $order_params_model = new shopOrderParamsModel();
     $product_reviews_model = new shopProductReviewsModel();
     foreach ($contacts as $contact) {
         // Insert customer info into params of their orders
         $order_ids = array_keys($order_model->select('id')->where('contact_id=:contact_id', array('contact_id' => $contact['id']))->fetchAll('id'));
         $order_params_model->set($order_ids, $this->extractContactInfo($contact), false);
         // Insert contact name into their reviews
         $product_reviews_model->updateByField('contact_id', $contact['id'], array('contact_id' => 0, 'name' => $contact['name'], 'auth_provider' => null));
     }
     // Update orders as if they were created by guests with no auth
     $order_model->updateByField('contact_id', $contact_ids, array('contact_id' => null));
     // Forget the customer
     $scm = new shopCustomerModel();
     $scm->deleteById($contact_ids);
     // Forget that this user created coupons
     $coupm = new shopCouponModel();
     $coupm->updateByField('create_contact_id', $contact_ids, array('create_contact_id' => 0));
     // !!! TODO: take a look to other models related with contacts
 }