<?php

/**

 * Zend Framework

 *

 * LICENSE

 *

 * This source file is subject to the new BSD license that is bundled

 * with this package in the file LICENSE.txt.

 * It is also available through the world-wide-web at this URL:

 * http://framework.zend.com/license/new-bsd

 * 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@zend.com so we can send you a copy immediately.

 *

 * @category   Zend

 * @package    Zend_Config

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 * @version    $Id: Xml.php 20096 2010-01-06 02:05:09Z bkarwin $

 */

/**

 * @see Zend_Config_Writer

 */

require_once 'Zend/Config/Writer/FileAbstract.php';

/**

 * @see Zend_Config_Xml

 */

require_once 'Zend/Config/Xml.php';

/**

 * @category   Zend

 * @package    Zend_Config

 * @copyright  Copyright (c) 2005-2010 Zend Technologies USA Inc. (http://www.zend.com)

 * @license    http://framework.zend.com/license/new-bsd     New BSD License

 */

class Zend_Config_Writer_Xml extends Zend_Config_Writer_FileAbstract

{

    /**

     * Render a Zend_Config into a XML config string.

     *

     * @since 1.10

     * @return string

     */

    public function render()

    {

        $xml         = new SimpleXMLElement('<zend-config xmlns:zf="' . Zend_Config_Xml::XML_NAMESPACE . '"/>');

        $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;

    }

    /**

     * Add a branch to an XML object recursively

     *

     * @param  Zend_Config      $config

     * @param  SimpleXMLElement $xml

     * @param  SimpleXMLElement $parent

     * @return void

     */

    protected function _addBranch(Zend_Config $config, SimpleXMLElement $xml, SimpleXMLElement $parent)

    {

        $branchType = null;

        foreach ($config as $key => $value) {

            if ($branchType === null) {

                if (is_numeric($key)) {

                    $branchType = 'numeric';

                    $branchName = $xml->getName();

                    $xml        = $parent;

                    unset($parent->{$branchName});

                } else {

                    $branchType = 'string';

                }

            } else if ($branchType !== (is_numeric($key) ? 'numeric' : 'string')) {

                require_once 'Zend/Config/Exception.php';

                throw new Zend_Config_Exception('Mixing of string and numeric keys is not allowed');

            }

            if ($branchType === 'numeric') {

                if ($value instanceof Zend_Config) {

                    $child = $parent->addChild($branchName);

                    $this->_addBranch($value, $child, $parent);

                } else {

                    $parent->addChild($branchName, (string) $value);

                }

            } else {

                if ($value instanceof Zend_Config) {

                    $child = $xml->addChild($key);

                    $this->_addBranch($value, $child, $xml);

                } else {

                    $xml->addChild($key, (string) $value);

                }

            }

        }

    }

}