Source for file XmlAction.class.php

<?php
/**
 * @since 11/29/06
 * @package polyphony.AbstractActions
 * 
 * @copyright Copyright &copy; 2005, Middlebury College
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License (GPL)
 *
 * @version $Id: XmlAction.class.php,v 1.4 2007/09/19 14:04:42 adamfranco Exp $
 */ 
 
require_once(POLYPHONY_DIR.'/main/library/AbstractActions/Action.class.php');
 
/**
 * A generic class for writing XML responses
 * 
 * @since 11/29/06
 * @package polyphony.AbstractActions
 * 
 * @copyright Copyright &copy; 2005, Middlebury College
 * @license http://www.gnu.org/copyleft/gpl.html GNU General Public License (GPL)
 *
 * @version $Id: XmlAction.class.php,v 1.4 2007/09/19 14:04:42 adamfranco Exp $
 */
class XmlAction
    extends Action
{
 
    /**
     * Answer a unauthorized response
     * 
     * @return void 
     * @access public
     * @since 11/29/06
     */
    function getUnauthorizedMessage () {
        $this->error('Unauthorized');
    }
        
    /**
     * Start the document
     * 
     * @return void 
     * @access public
     * @since 11/10/06
     */
    function start () {
        if (isset($this->_started))
            return;
        
        $this->_started = true;
        header("Content-Type: text/xml; charset=utf-8");
        print<<<END
<?xml version="1.0" encoding="utf-8" ?>
<response>
END;
    }
    
    /**
     * End the document
     * 
     * @return void 
     * @access public
     * @since 11/10/06
     */
    function end () {
        print "\n</response>";
        exit;
    }
    
    /**
     * Respond with an error
     * 
     * @param string $message 
     * @return void 
     * @access public
     * @since 11/29/06
     */
    function error ($message) {
        $this->start();
        print "\n\t<error><![CDATA[".str_replace(']]>', '}}>', $message)."]]></error>";
        $this->end();
    }
}
 
?>