protected function _parser($shortcode)
 {
     EE_Registry::instance()->load_helper('Formatter');
     $this->_event = $this->_data instanceof EE_Event ? $this->_data : null;
     //if no event, then let's see if there is a reg_obj.  If there IS, then we'll try and grab the event from the reg_obj instead.
     if (empty($this->_event)) {
         $aee = $this->_data instanceof EE_Messages_Addressee ? $this->_data : NULL;
         $aee = $this->_extra_data instanceof EE_Messages_Addressee ? $this->_extra_data : $aee;
         $this->_event = $aee instanceof EE_Messages_Addressee && $aee->reg_obj instanceof EE_Registration ? $aee->reg_obj->event() : NULL;
     }
     //If there is no event objecdt by now then get out.
     if (!$this->_event instanceof EE_Event) {
         return '';
     }
     switch ($shortcode) {
         case '[EVENT_ID]':
             return $this->_event->ID();
             break;
         case '[EVENT_IDENTIFIER]':
             return isset($this->_data['line_ref']) ? $this->_data['line_ref'] : '';
             break;
         case '[EVENT]':
         case '[EVENT_NAME]':
             return $this->_event->get('EVT_name');
             break;
         case '[EVENT_PHONE]':
             return $this->_event->get('EVT_phone');
             break;
         case '[EVENT_DESCRIPTION]':
             return $this->_event->get('EVT_desc');
             break;
         case '[EVENT_EXCERPT]':
             return $this->_event->get('EVT_short_desc');
             break;
         case '[EVENT_LINK]':
             return $this->_get_event_link($this->_event);
             break;
         case '[EVENT_URL]':
             return $this->_get_event_link($this->_event, FALSE);
             break;
         case '[VIRTUAL_URL]':
             $venue = $this->_event->get_first_related('Venue');
             if (empty($venue)) {
                 return '';
             }
             return $venue->get('VNU_virtual_url');
         case '[VIRTUAL_PHONE]':
             $venue = $this->_event->get_first_related('Venue');
             if (empty($venue)) {
                 return '';
             }
             return $venue->get('VNU_virtual_phone');
             break;
         case '[EVENT_IMAGE]':
             $image = $this->_event->feature_image_url(array(600, 300));
             // @todo: eventually we should make this an attribute shortcode so that em can send along what size they want returned.
             return !empty($image) ? '<img src="' . $image . '" alt="' . sprintf(esc_attr__('%s Feature Image', 'event_espresso'), $this->_event->get('EVT_name')) . '" />' : '';
             break;
         case '[EVENT_FACEBOOK_URL]':
             $facebook_url = $this->_event->get_post_meta('event_facebook', true);
             return empty($facebook_url) ? EE_Registry::instance()->CFG->organization->get_pretty('facebook') : $facebook_url;
             break;
         case '[EVENT_TWITTER_URL]':
             $twitter_url = $this->_event->get_post_meta('event_twitter', true);
             return empty($twitter_url) ? EE_Registry::instance()->CFG->organization->get_pretty('twitter') : $twitter_url;
             break;
         case '[EVENT_AUTHOR_EMAIL]':
             $author_id = $this->_event->get('EVT_wp_user');
             $user_data = get_userdata((int) $author_id);
             return $user_data->user_email;
             break;
         case '[EVENT_TOTAL_SPOTS_TAKEN]':
             return EEM_Registration::instance()->count(array(array('EVT_ID' => $this->_event->ID(), 'STS_ID' => EEM_Registration::status_id_approved)), 'REG_ID', true);
             break;
         case '[REGISTRATION_LIST_TABLE_FOR_EVENT_URL]':
             EE_Registry::instance()->load_helper('URL');
             return EEH_URL::add_query_args_and_nonce(array('event_id' => $this->_event->ID(), 'page' => 'espresso_registrations', 'action' => 'default'), admin_url('admin.php'), true);
             break;
     }
     if (strpos($shortcode, '[EVENT_META_*') !== false) {
         $shortcode = str_replace('[EVENT_META_*', '', $shortcode);
         $shortcode = trim(str_replace(']', '', $shortcode));
         //pull the meta value from the event post
         $event_meta = $this->_event->get_post_meta($shortcode, true);
         return !empty($event_meta) ? $this->_event->get_post_meta($shortcode, true) : '';
     }
     if (strpos($shortcode, '[EVENT_TOTAL_AVAILABLE_SPACES_*') !== false) {
         $attrs = $this->_get_shortcode_attrs($shortcode);
         $method = empty($attrs['method']) ? 'current' : $attrs['method'];
         $method = $method === 'current';
         $available = $this->_event->total_available_spaces($method);
         return $available === INF ? '&infin;' : $available;
     }
     return '';
 }
 protected function _parser($shortcode)
 {
     EE_Registry::instance()->load_helper('Formatter');
     $this->_event = $this->_data instanceof EE_Event ? $this->_data : null;
     //if no event, then let's see if there is a reg_obj.  If there IS, then we'll try and grab the event from the reg_obj instead.
     if (empty($this->_event)) {
         $aee = $this->_data instanceof EE_Messages_Addressee ? $this->_data : NULL;
         $aee = $this->_extra_data instanceof EE_Messages_Addressee ? $this->_extra_data : $aee;
         $this->_event = $aee instanceof EE_Messages_Addressee && $aee->reg_obj instanceof EE_Registration ? $aee->reg_obj->event() : NULL;
     }
     //If there is no event objecdt by now then get out.
     if (!$this->_event instanceof EE_Event) {
         return '';
     }
     switch ($shortcode) {
         case '[EVENT_ID]':
             return $this->_event->ID();
             break;
         case '[EVENT_IDENTIFIER]':
             return isset($this->_data['line_ref']) ? $this->_data['line_ref'] : '';
             break;
         case '[EVENT]':
         case '[EVENT_NAME]':
             return $this->_event->get('EVT_name');
             break;
         case '[EVENT_PHONE]':
             return $this->_event->get('EVT_phone');
             break;
         case '[EVENT_DESCRIPTION]':
             return $this->_event->get('EVT_desc');
             break;
         case '[EVENT_EXCERPT]':
             return $this->_event->get('EVT_short_desc');
             break;
         case '[EVENT_LINK]':
             return $this->_get_event_link($this->_event);
             break;
         case '[EVENT_URL]':
             return $this->_get_event_link($this->_event, FALSE);
             break;
         case '[VIRTUAL_URL]':
             $venue = $this->_event->get_first_related('Venue');
             if (empty($venue)) {
                 return '';
             }
             return $venue->get('VNU_virtual_url');
         case '[VIRTUAL_PHONE]':
             $venue = $this->_event->get_first_related('Venue');
             if (empty($venue)) {
                 return '';
             }
             return $venue->get('VNU_virtual_phone');
             break;
         case '[EVENT_IMAGE]':
             $image = $this->_event->feature_image_url(array(600, 300));
             // @todo: eventually we should make this an attribute shortcode so that em can send along what size they want returned.
             return !empty($image) ? '<img src="' . $image . '" alt="' . sprintf(esc_attr__('%s Feature Image', 'event_espresso'), $this->_event->get('EVT_name')) . '" />' : '';
             break;
         case '[EVENT_FACEBOOK_URL]':
             $facebook_url = $this->_event->get_post_meta('event_facebook', true);
             return empty($facebook_url) ? EE_Registry::instance()->CFG->organization->get_pretty('facebook') : $facebook_url;
             break;
         case '[EVENT_TWITTER_URL]':
             $twitter_url = $this->_event->get_post_meta('event_twitter', true);
             return empty($twitter_url) ? EE_Registry::instance()->CFG->organization->get_pretty('twitter') : $twitter_url;
             break;
         case '[EVENT_AUTHOR_EMAIL]':
             $author_id = $this->_event->get('EVT_wp_user');
             $user_data = get_userdata((int) $author_id);
             return $user_data->user_email;
             break;
     }
     return '';
 }