NotificationTargetCommonITILObject::getOldAssignTechnicianAddress PHP Method

    function getOldAssignTechnicianAddress()
    {
        global $CFG_GLPI;
        if (isset($this->options['_old_user']) && $this->options['_old_user']['type'] == CommonITILActor::ASSIGN && $this->options['_old_user']['use_notification']) {
            $user = new User();
            $user->getFromDB($this->options['_old_user']['users_id']);
            $author_email = UserEmail::getDefaultForUser($user->fields['id']);
            $author_lang = $user->fields["language"];
            $author_id = $user->fields['id'];
            if (!empty($this->options['_old_user']['alternative_email']) && $this->options['_old_user']['alternative_email'] != $author_email && NotificationMail::isUserAddressValid($this->options['_old_user']['alternative_email'])) {
                $author_email = $this->options['_old_user']['alternative_email'];
            }
            if (empty($author_lang)) {
                $author_lang = $CFG_GLPI["language"];
            }
            if (empty($author_id)) {
                $author_id = -1;
            }
            $this->addToAddressesList(array('email' => $author_email, 'language' => $author_lang, 'users_id' => $author_id));
        }
    }