display name logic

    function recipientName()
    {
        if($this->getRecipientFirstName() == '' && $this->getRecipientLastName() == ''){
            return '';
        }
        if($this->getRecipientFirstName() == '' ){
            return $this->getRecipientLastName();
        }
        if($this->getRecipientLastName() == '' ){
            return $this->getRecipientFirstName();
        }

        if (preg_match('/[^\\p{Common}\\p{Latin}]/u', $this->getRecipientLastName() . $this->getRecipientFirstName())){
            return $this->getRecipientLastName() . $this->getRecipientFirstName();
        }else{
            return $this->getRecipientFirstName() . ', ' . $this->getRecipientLastName();
        }
    }