<?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_Feed_Reader

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

 */

/**

 * @see Zend_Feed_Reader

 */

require_once 'Zend/Feed/Reader.php';

/**

 * @see Zend_Feed_Reader_Entry_Atom

 */

require_once 'Zend/Feed/Reader/Entry/Atom.php';

/**

 * @see Zend_Feed_Reader_Entry_Rss

 */

require_once 'Zend/Feed/Reader/Entry/Rss.php';

/**

 * @category   Zend

 * @package    Zend_Feed_Reader

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

 */

abstract class Zend_Feed_Reader_Extension_FeedAbstract

{

    /**

     * Parsed feed data

     *

     * @var array

     */

    protected $_data = array();

    /**

     * Parsed feed data in the shape of a DOMDocument

     *

     * @var DOMDocument

     */

    protected $_domDocument = null;

    /**

     * The base XPath query used to retrieve feed data

     *

     * @var DOMXPath

     */

    protected $_xpath = null;

    /**

     * The XPath prefix

     *

     * @var string

     */

    protected $_xpathPrefix = '';

    /**

     * Constructor

     *

     * @param  Zend_Feed_Abstract $feed The source Zend_Feed object

     * @param  string $type Feed type

     * @return void

     */

    public function __construct(DomDocument $dom, $type = null, DOMXPath $xpath = null)

    {

        $this->_domDocument = $dom;

        if ($type !== null) {

            $this->_data['type'] = $type;

        } else {

            $this->_data['type'] = Zend_Feed_Reader::detectType($dom);

        }

        if ($xpath !== null) {

            $this->_xpath = $xpath;

        } else {

            $this->_xpath = new DOMXPath($this->_domDocument);

        }

        $this->_registerNamespaces();

    }

    /**

     * Get the DOM

     *

     * @return DOMDocument

     */

    public function getDomDocument()

    {

        return $this->_domDocument;

    }

    /**

     * Get the Feed's encoding

     *

     * @return string

     */

    public function getEncoding()

    {

        $assumed = $this->getDomDocument()->encoding;

        return $assumed;

    }

    /**

     * Get the feed type

     *

     * @return string

     */

    public function getType()

    {

        return $this->_data['type'];

    }

    /**

     * Return the feed as an array

     *

     * @return array

     */

    public function toArray() // untested

    {

        return $this->_data;

    }

    /**

     * Set the XPath query

     *

     * @param  DOMXPath $xpath

     * @return Zend_Feed_Reader_Extension_EntryAbstract

     */

    public function setXpath(DOMXPath $xpath)

    {

        $this->_xpath = $xpath;

        $this->_registerNamespaces();

        return $this;

    }

    /**

     * Get the DOMXPath object

     *

     * @return string

     */

    public function getXpath()

    {

        return $this->_xpath;

    }

    /**

     * Get the XPath prefix

     *

     * @return string

     */

    public function getXpathPrefix()

    {

        return $this->_xpathPrefix;

    }

    /**

     * Set the XPath prefix

     *

     * @return Zend_Feed_Reader_Feed_Atom

     */

    public function setXpathPrefix($prefix)

    {

        $this->_xpathPrefix = $prefix;

    }

    /**

     * Register the default namespaces for the current feed format

     */

    abstract protected function _registerNamespaces();

}