/**
  * Handle activate & cancel actions for both individual items and bulk edit. 
  *
  * @since 1.0
  */
 public function process_actions()
 {
     if ($this->current_action() === false) {
         return;
     }
     $messages = array();
     $error_messages = array();
     // Single subscription action
     if (isset($_GET['subscription'])) {
         if (!wp_verify_nonce($_REQUEST['_wpnonce'], $_GET['subscription'])) {
             wp_die(__('Action failed. Invalid Nonce.', WC_Subscriptions::$text_domain));
         }
         if (!WC_Subscriptions_Manager::can_subscription_be_changed_to($_GET['new_status'], $_GET['subscription'], $_GET['user'])) {
             $error_messages[] = sprintf(__('Error: Subscription status can not be changed to "%s".', WC_Subscriptions::$text_domain), esc_html($_GET['new_status']));
         } else {
             switch ($_GET['new_status']) {
                 case 'active':
                     WC_Subscriptions_Manager::reactivate_subscription($_GET['user'], $_GET['subscription']);
                     $messages[] = __('Subscription activated.', WC_Subscriptions::$text_domain);
                     break;
                 case 'suspended':
                     WC_Subscriptions_Manager::suspend_subscription($_GET['user'], $_GET['subscription']);
                     $messages[] = __('Subscription suspended.', WC_Subscriptions::$text_domain);
                     break;
                 case 'cancelled':
                     WC_Subscriptions_Manager::cancel_subscription($_GET['user'], $_GET['subscription']);
                     $messages[] = __('Subscription cancelled.', WC_Subscriptions::$text_domain);
                     break;
                 case 'trash':
                     WC_Subscriptions_Manager::trash_subscription($_GET['user'], $_GET['subscription']);
                     $messages[] = __('Subscription trashed.', WC_Subscriptions::$text_domain);
                     break;
                 default:
                     $error_messages[] = __('Error: Unknown subscription status.', WC_Subscriptions::$text_domain);
                     break;
             }
         }
     } else {
         if (isset($_GET['subscriptions'])) {
             // Bulk actions
             if (!wp_verify_nonce($_REQUEST['_wpnonce'], 'bulk-' . $this->_args['plural'])) {
                 wp_die(__('Bulk edit failed. Invalid Nonce.', WC_Subscriptions::$text_domain));
             }
             $subscriptions = $_GET[$this->_args['plural']];
             $subscription_count = 0;
             $error_count = 0;
             if ('trash' === $this->current_action()) {
                 foreach ($subscriptions as $user_id => $subscription_keys) {
                     foreach ($subscription_keys as $subscription_key) {
                         if (!WC_Subscriptions_Manager::can_subscription_be_changed_to('trash', $subscription_key, $user_id)) {
                             $error_count++;
                         } else {
                             $subscription_count++;
                             WC_Subscriptions_Manager::trash_subscription($user_id, $subscription_key);
                         }
                     }
                 }
                 if ($subscription_count > 0) {
                     $messages[] = sprintf(_n('%d subscription moved to trash.', '%s subscriptions moved to trash.', $subscription_count), $subscription_count);
                 }
                 if ($error_count > 0) {
                     $error_messages[] = sprintf(_n('%d subscription could not be trashed - is it active or suspended? Try cancelling it before trashing it.', '%s subscriptions could not be trashed - are they active or suspended? Try cancelling them before trashing.', $error_count), $error_count);
                 }
             }
         }
     }
     $status = isset($_GET['status']) ? $_GET['status'] : 'all';
     $message_nonce = wp_create_nonce(__FILE__);
     set_transient($this->message_transient_prefix . $message_nonce, array('messages' => $messages, 'error_messages' => $error_messages), 60 * 60);
     $redirect_to = add_query_arg(array('status' => $status, 'message' => $message_nonce), admin_url('admin.php?page=subscriptions'));
     // Redirect to avoid performning actions on a page refresh
     wp_safe_redirect($redirect_to);
 }