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<?php
/**
* Portions Copyright 2005-2007 Zend Technologies USA Inc. (http://www.zend.com)
* Copyright 2007-2014 Horde LLC (http://www.horde.org/)
*
* @category Horde
* @package Feed
*/
/**
* The Horde_Feed_Base class is an abstract class representing feeds.
*
* Horde_Feed_Base implements two core PHP 5 interfaces: ArrayAccess
* and Iterator. In both cases the collection being treated as an
* array is considered to be the entry collection, such that iterating
* over the feed takes you through each of the feed's entries.
*
* @category Horde
* @package Feed
*/
abstract class Horde_Feed_Base extends Horde_Xml_Element_List
{
/**
* Our root ("home") URI
*
* @var string
*/
protected $_uri;
/**
* @var Horde_Http_Client
*/
protected $_httpClient;
/**
* Feed constructor
*
* The Horde_Feed_Base constructor takes the URI of a feed or a
* feed represented as a string and loads it as XML.
*
* @throws Horde_Feed_Exception If loading the feed failed.
*
* @param mixed $xml The feed as a string, a DOMElement, or null.
* @param string $uri The full URI of the feed, or null if unknown.
*/
public function __construct($xml = null, $uri = null, Horde_Http_Client $httpClient = null)
{
$this->_uri = $uri;
if (is_null($httpClient)) {
$httpClient = new Horde_Http_Client();
}
$this->_httpClient = $httpClient;
try {
parent::__construct($xml);
} catch (Horde_Xml_Element_Exception $e) {
throw new Horde_Feed_Exception('Unable to load feed: ' . $e->getMessage());
}
}
/**
* Handle null or array values for $this->_element by initializing
* with $this->_emptyXml, and importing the array with
* Horde_Xml_Element::fromArray() if necessary.
*
* @see Horde_Xml_Element::__wakeup
* @see Horde_Xml_Element::fromArray
*/
public function __wakeup()
{
// If we've been passed an array, we'll store it for importing
// after initializing with the default "empty" feed XML.
$importArray = null;
if (is_null($this->_element)) {
$this->_element = $this->_emptyXml;
} elseif (is_array($this->_element)) {
$importArray = $this->_element;
$this->_element = $this->_emptyXml;
}
parent::__wakeup();
if (!is_null($importArray)) {
$this->fromArray($importArray);
}
}
/**
* Required by the Iterator interface.
*
* @internal
*
* @return mixed The current row, or null if no rows.
*/
public function current()
{
return new $this->_listItemClassName(
$this->_listItems[$this->_listItemIndex], $this->_httpClient);
}
}
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