/**
  * @param
  */
 protected function setMailBody()
 {
     $isHtml = $this->eventMessageFields["BODY_TYPE"] == "html";
     // replace placeholders in body
     $message = $this->eventMessageFields["MESSAGE_PHP"];
     if (empty($message) && !empty($this->eventMessageFields["MESSAGE"])) {
         $message = MailInternal\EventMessageTable::replaceTemplateToPhp($this->eventMessageFields["MESSAGE"]);
         if ($this->eventMessageFields["ID"] > 0) {
             MailInternal\EventMessageTable::update($this->eventMessageFields["ID"], array('MESSAGE_PHP' => $message));
         }
     }
     if (!empty($this->eventMessageFields['SITE_TEMPLATE_ID'])) {
         $siteTemplateId = $this->eventMessageFields['SITE_TEMPLATE_ID'];
     } else {
         $siteTemplateId = null;
     }
     $themeCompiler = EventMessageThemeCompiler::createInstance($siteTemplateId, $message, $isHtml);
     if (empty($siteTemplateId)) {
         $siteTemplateId = ".default";
     }
     // set context variables for components
     $themeCompiler->setSiteTemplateId($siteTemplateId);
     $themeCompiler->setSiteId($this->siteId);
     $themeCompiler->setLanguageId($this->languageId);
     Loc::setCurrentLang($themeCompiler->getLanguageId());
     // set values of $arParams, used by components
     $eventSiteFields = $this->eventSiteFields;
     if ($isHtml) {
         foreach ($eventSiteFields as $fieldKey => $fieldValue) {
             if (strpos($fieldValue, "<") === false) {
                 $eventSiteFields[$fieldKey] = nl2br($fieldValue);
             }
         }
     }
     $themeCompiler->setParams($eventSiteFields);
     // eval site template and body
     $themeCompiler->execute();
     // get eval result of site template and body
     $message = $themeCompiler->getResult();
     $this->mailBody = $message;
     Loc::setCurrentLang(null);
     EventMessageThemeCompiler::unsetInstance();
 }