/**
  * create / update subscription
  * return newsletter_user_object
  *
  * @param integer $listContentObjectId
  * @param integer $newsletterUserId
  * @param array $outputFormatArray
  * @param integer $status
  * @param integer $dryRun if true changes will be not stored to db usefull for test runs @see user_edit
  * @return object
  */
 static function createUpdateNewsletterSubscription($listContentObjectId, $newsletterUserId, $outputFormatArray, $status = CjwNewsletterSubscription::STATUS_PENDING, $dryRun = false, $context = 'default')
 {
     $existingSubscriptionObject = CjwNewsletterSubscription::fetchByListIdAndNewsletterUserId($listContentObjectId, $newsletterUserId);
     $newsletterUser = CjwNewsletterUser::fetch($newsletterUserId);
     // if nl user status is confirmed set all nl subscription with status pending to confirmed
     if (is_object($newsletterUser) && (int) $newsletterUser->attribute('status') == CjwNewsletterUser::STATUS_CONFIRMED && $status == CjwNewsletterSubscription::STATUS_PENDING) {
         $status = CjwNewsletterSubscription::STATUS_CONFIRMED;
     }
     // update existing
     if (is_object($existingSubscriptionObject)) {
         $existingSubscriptionObject->setAttribute('output_format_array_string', CjwNewsletterSubscription::arrayToString($outputFormatArray));
         if ($context == 'configure') {
             // if nl list autoapprove is disabled + admin has approved the nl subscription
             // + the nl subscription should be get status approved when update confirmstatus,
             if ($existingSubscriptionObject->attribute('status') == CjwNewsletterSubscription::STATUS_APPROVED) {
                 // set confirmed timestamp if emty - could be possible if admin has approved subscription before user has confirm his email address
                 if ($existingSubscriptionObject->attribute('confirmed') == 0) {
                     $existingSubscriptionObject->setAttribute('confirmed', time());
                 }
                 // else nothing
             } else {
                 $existingSubscriptionObject->setAttribute('status', $status);
             }
         } else {
             $existingSubscriptionObject->setAttribute('status', $status);
         }
         if ($dryRun === false) {
             $existingSubscriptionObject->sync();
         }
         return $existingSubscriptionObject;
     } else {
         $object = CjwNewsletterSubscription::create($listContentObjectId, $newsletterUserId, $outputFormatArray, $status, $context);
         if ($dryRun === false) {
             $object->store();
         }
         return $object;
     }
 }