/**
  * Get the total activations for this product.
  *
  * @since 1.0
  *
  * @return int
  */
 public function get_total_active_activations()
 {
     if ($this->get_status() == self::STATUS_ARCHIVED) {
         return $this->get_meta('activations', true);
     }
     if (!$this->get_start_date()) {
         return 0;
     }
     $found = null;
     $total = wp_cache_get($this->get_pk(), 'itelic-release-active-activations', false, $found);
     if ($found === false) {
         $query = new Activations(array('status' => Activation::ACTIVE, 'product' => $this->get_product()->ID, 'activation' => array('before' => $this->get_start_date()->format('Y-m-d H:i:s')), 'return_value' => 'count'));
         $total = $query->get_total_items();
         wp_cache_set($this->get_pk(), $total, 'itelic-release-active-activations');
     }
     return $total;
 }
 /**
  * Setup the template manager for the notification sent to outdated
  * customers.
  *
  * @since 1.0
  *
  * @param Template_Manager $manager
  */
 public function outdated_customers_manager(Template_Manager $manager)
 {
     $shared = \ITELIC\get_shared_tags();
     foreach ($shared as $listener) {
         $manager->listen($listener);
     }
     $manager->listen(new Listener('product_name', function (Release $release) {
         return $release->get_product()->post_title;
     }));
     $manager->listen(new Listener('version', function (Release $release) {
         return $release->get_version();
     }));
     $manager->listen(new Listener('changelog', function (Release $release) {
         return $release->get_changelog();
     }));
     $manager->listen(new Listener('install_list', function (Release $release, \WP_User $to) {
         $query = new Activations(array('status' => Activation::ACTIVE, 'product' => $release->get_product()->ID, 'customer' => $to->ID, 'release__not_in' => array($release->get_pk())));
         $activations = array_filter($query->get_results(), function (Activation $activation) use($release) {
             if (!$activation->get_release()) {
                 return true;
             }
             return version_compare($activation->get_release()->get_version(), $release->get_version(), '<');
         });
         $html = '<ul>';
         /** @var Activation $activation */
         foreach ($activations as $activation) {
             $html .= '<li>' . "{$activation->get_location()} – v{$activation->get_release()->get_version()}" . '</li>';
         }
         $html .= '</ul>';
         return $html;
     }));
 }