<?
class My_Auth_Adapter implements Zend_Auth_Adapter_Interface {

    const OK_RESPONSE = 'OK';
    const KO_RESPONSE = 'KO';

    private $_username = '';
    private $_password = '';
    private $_data = null;

    public function setIdentity($username) {
        $this->_username = $username;
    }

    public function setCredential($password) {
        $this->_password = $password;
    }

    /**
     * Authenticate the user
     * 
     * @return Zend_Auth_Result 
     */
    public function authenticate() {
        $endpointLoginAuthor = Zend_Registry::get('config')->endpoint->userService->loginAuthor;

        $client = new Zend_Rest_Client($endpointLoginAuthor);
        $client->username($this->_username);
        $client->password($this->_password);

        $response = $client->get();
        
        $authenticated = ($response->ResponseDescription == $this::OK_RESPONSE);
        $authResult = Zend_Auth_Result::FAILURE;

        $authMessages = array();

        if ($authenticated){
            // user is authenticated, overwrite the auth result:
            $authResult = Zend_Auth_Result::SUCCESS;
            $this->_data = $response->Author;
        } else {
            // Couldn't authenticate the user, set a message:
            $authMessages[] = 'Datos de acceso inválidos.';
        }

        // return the result:
        return new Zend_Auth_Result( $authResult, $this->_username, $authMessages );

    }

    /**
     *
     * @param <type> $returnColumns
     * @param <type> $omitColumns
     * @return <type> SimpleXMLObject
     */
     public function getResultRowObject($returnColumns = null, $omitColumns = null){
        // If no data is set, return false:
        if (!$this->_data) {
            return false;
        }

        return $this->_data;
    }
}

?>