<?php
/**
 * Magento
 *
 * NOTICE OF LICENSE
 *
 * This source file is subject to the Open Software License (OSL 3.0)
 * that is bundled with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://opensource.org/licenses/osl-3.0.php
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@magentocommerce.com so we can send you a copy immediately.
 *
 * DISCLAIMER
 *
 * Do not edit or add to this file if you wish to upgrade Magento to newer
 * versions in the future. If you wish to customize Magento for your
 * needs please refer to http://www.magentocommerce.com for more information.
 *
 * @category    Mage
 * @package     Mage_Api2
 * @copyright   Copyright (c) 2012 Magento Inc. (http://www.magentocommerce.com)
 * @license     http://opensource.org/licenses/osl-3.0.php  Open Software License (OSL 3.0)
 */

/**
 * API XML Renderer Writer
 *
 * @category   Mage
 * @package    Mage_Api2
 * @author     Magento Core Team <core@magentocommerce.com>
 */
class Mage_Api2_Model_Renderer_Xml_Writer extends Zend_Config_Writer_Xml
{
    /**
     * Root node in XML output
     */
    const XML_ROOT_NODE = 'magento_api';

    /**
     * Render a Zend_Config into a XML config string.
     * OVERRIDE to avoid using zend-config string in XML
     *
     * @return string
     */
    public function render()
    {
        $xml         = new SimpleXMLElement('<' . self::XML_ROOT_NODE . '/>');
        $extends     = $this->_config->getExtends();
        $sectionName = $this->_config->getSectionName();

        if (is_string($sectionName)) {
            $child = $xml->addChild($sectionName);

            $this->_addBranch($this->_config, $child, $xml);
        } else {
            foreach ($this->_config as $sectionName => $data) {
                if (!($data instanceof Zend_Config)) {
                    $xml->addChild($sectionName, (string) $data);
                } else {
                    $child = $xml->addChild($sectionName);

                    if (isset($extends[$sectionName])) {
                        $child->addAttribute('zf:extends', $extends[$sectionName], Zend_Config_Xml::XML_NAMESPACE);
                    }

                    $this->_addBranch($data, $child, $xml);
                }
            }
        }

        $dom = dom_import_simplexml($xml)->ownerDocument;
        $dom->formatOutput = true;

        $xmlString = $dom->saveXML();

        return $xmlString;
    }
}