azine / email-bundle

        $recipientParams[self::CONTENT_ITEMS] = $this->orderContentItems(array_merge($recipientContentItems,  $params[self::CONTENT_ITEMS]));

        $recipientParams['_locale'] = $recipient->getPreferredLocale();

        if (sizeof($recipientParams[self::CONTENT_ITEMS]) == 0) {

            $this->logger->warning("The newsletter for '".$recipient->getDisplayName()." <".$recipient->getEmail().">' has not been sent. It would have been empty.", $params);

            return $recipient->getEmail();

        }

        $subject = $this->getRecipientSpecificNewsletterSubject($params[self::CONTENT_ITEMS], $recipientContentItems, $params, $recipient, $recipient->getPreferredLocale());

        // render and send the email with the right wrapper-template

        $sent = $this->mailer->sendSingleEmail($recipient->getEmail(), $recipient->getDisplayName(), $subject, $recipientParams, $wrapperTemplate.".txt.twig", $recipient->getPreferredLocale());

        if ($sent) {

            // save that this recipient has recieved the newsletter

            return null;

        } else {

            $this->logger->error("The newsletter for ".$recipient->getDisplayName()." <".$recipient->getEmail()."> could not be sent!", $params);

            return $recipient->getEmail();

        }

    }

    /**