<?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_Service

 * @subpackage Ebay

 * @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: Abstract.php 22791 2010-08-04 16:11:47Z renanbr $

 */

/**

 * @see Zend_Service_Ebay_Abstract

 */

require_once 'Zend/Service/Ebay/Abstract.php';

/**

 * @see Zend_Service_Ebay_Finding

 */

require_once 'Zend/Service/Ebay/Finding.php';

/**

 * @category   Zend

 * @package    Zend_Service

 * @subpackage Ebay

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

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

 */

abstract class Zend_Service_Ebay_Finding_Abstract

{

    /**

     * @var DOMElement

     */

    protected $_dom;

    /**

     * @var DOMXPath

     */

    protected $_xPath;

    /**

     * @var array

     */

    protected $_attributes = array();

    /**

     * @param  DOMElement $dom

     * @return void

     */

    public function __construct(DOMElement $dom)

    {

        $this->_dom = $dom;

        $this->_initXPath();

        $this->_init();

    }

    /**

     * @param  string $tag

     * @param  string $attribute

     * @return mixed

     */

    public function attributes($tag, $attribute = null)

    {

        if (null === $attribute) {

            // all attributes

            if (array_key_exists($tag, $this->_attributes)) {

                return $this->_attributes[$tag];

            }

            return array();

        }

        // a specific attribute

        if (isset($this->_attributes[$tag][$attribute])) {

            return $this->_attributes[$tag][$attribute];

        }

        return null;

    }

    /**

     * Initialize object.

     *

     * Post construct logic, classes must read their members here. Called from

     * {@link __construct()} as final step of object initialization.

     *

     * @return void

     */

    protected function _init()

    {

    }

    /**

     * Load DOMXPath for current DOM object.

     *

     * @see    Zend_Service_Ebay_Finding::_parseResponse()

     * @return void

     */

    protected function _initXPath()

    {

        $document = $this->_dom->ownerDocument;

        if (!isset($document->ebayFindingXPath)) {

            $xpath = new DOMXPath($document);

            foreach (Zend_Service_Ebay_Finding::getXmlNamespaces() as $alias => $uri) {

                $xpath->registerNamespace($alias, $uri);

            }

            $document->ebayFindingXPath = $xpath;

        }

        $this->_xPath = $document->ebayFindingXPath;

    }

    /**

     * @return DOMElement

     */

    public function getDom()

    {

        return $this->_dom;

    }

    /**

     * @return DOMXPath

     */

    public function getXPath()

    {

        return $this->_xPath;

    }

    /**

     * @param  string $path

     * @param  string $type

     * @param  string $array When true means it expects more than one node occurence

     * @return mixed

     */

    protected function _query($path, $type, $array = false)

    {

        // find values

        $values = array();

        $nodes  = $this->_xPath->query($path, $this->_dom);

        foreach ($nodes as $node) {

            $value    = (string) $node->nodeValue;

            $values[] = Zend_Service_Ebay_Abstract::toPhpValue($value, $type);

            if (!$array) {

                break;

            }

        }

        // array

        if ($array) {

            return $values;

        }

        // single value

        if (count($values)) {

            return reset($values);

        }

        // no nodes fount

        return null;

    }

}