public function setFacebook($value)
    {
        $nickname = $url = '';
        if (strlen($value)) {
            if (strpos($value, 'http') !== false) {
                $url = $value;
                $nickname = substr($value, strrpos($value, '/') + 1);
            } else {
                $nickname = $value;
                $url = 'https://facebook.com/' . $value;
            }
        }
        update_user_meta($this->ID, User::KEY_FACEBOOK, $nickname);
        update_user_meta($this->ID, User::KEY_FACEBOOK_URL, $url);
    }