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<?php
/**
* Zend Framework (http://framework.zend.com/)
*
* @link http://github.com/zendframework/zf2 for the canonical source repository
* @copyright Copyright (c) 2005-2014 Zend Technologies USA Inc. (http://www.zend.com)
* @license http://framework.zend.com/license/new-bsd New BSD License
*/
namespace Zend\Feed\Reader;
use DOMDocument;
use DOMElement;
use DOMXPath;
abstract class AbstractEntry
{
/**
* Feed entry data
*
* @var array
*/
protected $data = array();
/**
* DOM document object
*
* @var DOMDocument
*/
protected $domDocument = null;
/**
* Entry instance
*
* @var DOMElement
*/
protected $entry = null;
/**
* Pointer to the current entry
*
* @var int
*/
protected $entryKey = 0;
/**
* XPath object
*
* @var DOMXPath
*/
protected $xpath = null;
/**
* Registered extensions
*
* @var array
*/
protected $extensions = array();
/**
* Constructor
*
* @param DOMElement $entry
* @param int $entryKey
* @param null|string $type
*/
public function __construct(DOMElement $entry, $entryKey, $type = null)
{
$this->entry = $entry;
$this->entryKey = $entryKey;
$this->domDocument = $entry->ownerDocument;
if ($type !== null) {
$this->data['type'] = $type;
} else {
$this->data['type'] = Reader::detectType($entry);
}
$this->_loadExtensions();
}
/**
* Get the DOM
*
* @return DOMDocument
*/
public function getDomDocument()
{
return $this->domDocument;
}
/**
* Get the entry element
*
* @return DOMElement
*/
public function getElement()
{
return $this->entry;
}
/**
* Get the Entry's encoding
*
* @return string
*/
public function getEncoding()
{
$assumed = $this->getDomDocument()->encoding;
if (empty($assumed)) {
$assumed = 'UTF-8';
}
return $assumed;
}
/**
* Get entry as xml
*
* @return string
*/
public function saveXml()
{
$dom = new DOMDocument('1.0', $this->getEncoding());
$entry = $dom->importNode($this->getElement(), true);
$dom->appendChild($entry);
return $dom->saveXml();
}
/**
* Get the entry type
*
* @return string
*/
public function getType()
{
return $this->data['type'];
}
/**
* Get the XPath query object
*
* @return DOMXPath
*/
public function getXpath()
{
if (!$this->xpath) {
$this->setXpath(new DOMXPath($this->getDomDocument()));
}
return $this->xpath;
}
/**
* Set the XPath query
*
* @param DOMXPath $xpath
* @return \Zend\Feed\Reader\AbstractEntry
*/
public function setXpath(DOMXPath $xpath)
{
$this->xpath = $xpath;
return $this;
}
/**
* Get registered extensions
*
* @return array
*/
public function getExtensions()
{
return $this->extensions;
}
/**
* Return an Extension object with the matching name (postfixed with _Entry)
*
* @param string $name
* @return \Zend\Feed\Reader\Extension\AbstractEntry
*/
public function getExtension($name)
{
if (array_key_exists($name . '\Entry', $this->extensions)) {
return $this->extensions[$name . '\Entry'];
}
return null;
}
/**
* Method overloading: call given method on first extension implementing it
*
* @param string $method
* @param array $args
* @return mixed
* @throws Exception\BadMethodCallException if no extensions implements the method
*/
public function __call($method, $args)
{
foreach ($this->extensions as $extension) {
if (method_exists($extension, $method)) {
return call_user_func_array(array($extension, $method), $args);
}
}
throw new Exception\BadMethodCallException('Method: ' . $method
. 'does not exist and could not be located on a registered Extension');
}
/**
* Load extensions from Zend\Feed\Reader\Reader
*
* @return void
*/
protected function _loadExtensions()
{
$all = Reader::getExtensions();
$feed = $all['entry'];
foreach ($feed as $extension) {
if (in_array($extension, $all['core'])) {
continue;
}
$className = Reader::getPluginLoader()->getClassName($extension);
$this->extensions[$extension] = new $className(
$this->getElement(), $this->entryKey, $this->data['type']
);
}
}
}
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