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391 lines
13 KiB
PHP
391 lines
13 KiB
PHP
<?php
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/**
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* Zend Framework
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*
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* LICENSE
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*
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* This source file is subject to the new BSD license that is bundled
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* with this package in the file LICENSE.txt.
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* It is also available through the world-wide-web at this URL:
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* http://framework.zend.com/license/new-bsd
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* If you did not receive a copy of the license and are unable to
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* obtain it through the world-wide-web, please send an email
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* to license@zend.com so we can send you a copy immediately.
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*
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* @category Zend
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* @package Zend_Feed
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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* @version $Id: Atom.php 16205 2009-06-21 19:08:45Z thomas $
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*/
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/**
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* @see Zend_Feed_Abstract
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*/
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require_once 'Zend/Feed/Abstract.php';
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/**
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* @see Zend_Feed_Entry_Atom
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*/
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require_once 'Zend/Feed/Entry/Atom.php';
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/**
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* Atom feed class
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*
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* The Zend_Feed_Atom class is a concrete subclass of the general
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* Zend_Feed_Abstract class, tailored for representing an Atom
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* feed. It shares all of the same methods with its abstract
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* parent. The distinction is made in the format of data that
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* Zend_Feed_Atom expects, and as a further pointer for users as to
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* what kind of feed object they have been passed.
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*
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* @category Zend
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* @package Zend_Feed
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* @copyright Copyright (c) 2005-2009 Zend Technologies USA Inc. (http://www.zend.com)
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* @license http://framework.zend.com/license/new-bsd New BSD License
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*/
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class Zend_Feed_Atom extends Zend_Feed_Abstract
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{
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/**
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* The classname for individual feed elements.
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*
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* @var string
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*/
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protected $_entryClassName = 'Zend_Feed_Entry_Atom';
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/**
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* The element name for individual feed elements (Atom <entry>
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* elements).
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*
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* @var string
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*/
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protected $_entryElementName = 'entry';
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/**
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* The default namespace for Atom feeds.
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*
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* @var string
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*/
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protected $_defaultNamespace = 'atom';
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/**
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* Override Zend_Feed_Abstract to set up the $_element and $_entries aliases.
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*
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* @return void
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* @throws Zend_Feed_Exception
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*/
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public function __wakeup()
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{
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parent::__wakeup();
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// Find the base feed element and create an alias to it.
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$element = $this->_element->getElementsByTagName('feed')->item(0);
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if (!$element) {
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// Try to find a single <entry> instead.
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$element = $this->_element->getElementsByTagName($this->_entryElementName)->item(0);
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if (!$element) {
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('No root <feed> or <' . $this->_entryElementName
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. '> element found, cannot parse feed.');
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}
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$doc = new DOMDocument($this->_element->version,
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$this->_element->actualEncoding);
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$feed = $doc->appendChild($doc->createElement('feed'));
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$feed->appendChild($doc->importNode($element, true));
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$element = $feed;
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}
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$this->_element = $element;
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// Find the entries and save a pointer to them for speed and
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// simplicity.
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$this->_buildEntryCache();
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}
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/**
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* Easy access to <link> tags keyed by "rel" attributes.
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*
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* If $elt->link() is called with no arguments, we will attempt to
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* return the value of the <link> tag(s) like all other
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* method-syntax attribute access. If an argument is passed to
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* link(), however, then we will return the "href" value of the
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* first <link> tag that has a "rel" attribute matching $rel:
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*
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* $elt->link(): returns the value of the link tag.
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* $elt->link('self'): returns the href from the first <link rel="self"> in the entry.
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*
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* @param string $rel The "rel" attribute to look for.
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* @return mixed
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*/
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public function link($rel = null)
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{
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if ($rel === null) {
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return parent::__call('link', null);
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}
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// index link tags by their "rel" attribute.
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$links = parent::__get('link');
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if (!is_array($links)) {
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if ($links instanceof Zend_Feed_Element) {
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$links = array($links);
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} else {
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return $links;
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}
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}
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foreach ($links as $link) {
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if (empty($link['rel'])) {
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continue;
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}
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if ($rel == $link['rel']) {
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return $link['href'];
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}
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}
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return null;
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}
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/**
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* Make accessing some individual elements of the feed easier.
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*
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* Special accessors 'entry' and 'entries' are provided so that if
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* you wish to iterate over an Atom feed's entries, you can do so
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* using foreach ($feed->entries as $entry) or foreach
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* ($feed->entry as $entry).
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*
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* @param string $var The property to access.
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* @return mixed
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*/
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public function __get($var)
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{
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switch ($var) {
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case 'entry':
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// fall through to the next case
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case 'entries':
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return $this;
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default:
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return parent::__get($var);
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}
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}
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/**
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* Generate the header of the feed when working in write mode
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*
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* @param array $array the data to use
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* @return DOMElement root node
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*/
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protected function _mapFeedHeaders($array)
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{
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$feed = $this->_element->createElement('feed');
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$feed->setAttribute('xmlns', 'http://www.w3.org/2005/Atom');
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$id = $this->_element->createElement('id', $array->link);
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$feed->appendChild($id);
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$title = $this->_element->createElement('title');
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$title->appendChild($this->_element->createCDATASection($array->title));
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$feed->appendChild($title);
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if (isset($array->author)) {
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$author = $this->_element->createElement('author');
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$name = $this->_element->createElement('name', $array->author);
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$author->appendChild($name);
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if (isset($array->email)) {
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$email = $this->_element->createElement('email', $array->email);
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$author->appendChild($email);
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}
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$feed->appendChild($author);
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}
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$updated = isset($array->lastUpdate) ? $array->lastUpdate : time();
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$updated = $this->_element->createElement('updated', date(DATE_ATOM, $updated));
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$feed->appendChild($updated);
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if (isset($array->published)) {
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$published = $this->_element->createElement('published', date(DATE_ATOM, $array->published));
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$feed->appendChild($published);
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}
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$link = $this->_element->createElement('link');
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$link->setAttribute('rel', 'self');
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$link->setAttribute('href', $array->link);
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if (isset($array->language)) {
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$link->setAttribute('hreflang', $array->language);
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}
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$feed->appendChild($link);
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if (isset($array->description)) {
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$subtitle = $this->_element->createElement('subtitle');
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$subtitle->appendChild($this->_element->createCDATASection($array->description));
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$feed->appendChild($subtitle);
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}
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if (isset($array->copyright)) {
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$copyright = $this->_element->createElement('rights', $array->copyright);
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$feed->appendChild($copyright);
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}
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if (isset($array->image)) {
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$image = $this->_element->createElement('logo', $array->image);
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$feed->appendChild($image);
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}
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$generator = !empty($array->generator) ? $array->generator : 'Zend_Feed';
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$generator = $this->_element->createElement('generator', $generator);
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$feed->appendChild($generator);
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return $feed;
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}
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/**
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* Generate the entries of the feed when working in write mode
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*
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* The following nodes are constructed for each feed entry
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* <entry>
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* <id>url to feed entry</id>
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* <title>entry title</title>
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* <updated>last update</updated>
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* <link rel="alternate" href="url to feed entry" />
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* <summary>short text</summary>
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* <content>long version, can contain html</content>
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* </entry>
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*
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* @param array $array the data to use
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* @param DOMElement $root the root node to use
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* @return void
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*/
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protected function _mapFeedEntries(DOMElement $root, $array)
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{
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foreach ($array as $dataentry) {
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$entry = $this->_element->createElement('entry');
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$id = $this->_element->createElement('id', isset($dataentry->guid) ? $dataentry->guid : $dataentry->link);
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$entry->appendChild($id);
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$title = $this->_element->createElement('title');
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$title->appendChild($this->_element->createCDATASection($dataentry->title));
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$entry->appendChild($title);
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$updated = isset($dataentry->lastUpdate) ? $dataentry->lastUpdate : time();
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$updated = $this->_element->createElement('updated', date(DATE_ATOM, $updated));
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$entry->appendChild($updated);
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$link = $this->_element->createElement('link');
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$link->setAttribute('rel', 'alternate');
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$link->setAttribute('href', $dataentry->link);
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$entry->appendChild($link);
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$summary = $this->_element->createElement('summary');
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$summary->appendChild($this->_element->createCDATASection($dataentry->description));
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$entry->appendChild($summary);
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if (isset($dataentry->content)) {
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$content = $this->_element->createElement('content');
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$content->setAttribute('type', 'html');
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$content->appendChild($this->_element->createCDATASection($dataentry->content));
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$entry->appendChild($content);
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}
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if (isset($dataentry->category)) {
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foreach ($dataentry->category as $category) {
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$node = $this->_element->createElement('category');
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$node->setAttribute('term', $category['term']);
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if (isset($category['scheme'])) {
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$node->setAttribute('scheme', $category['scheme']);
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}
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$entry->appendChild($node);
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}
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}
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if (isset($dataentry->source)) {
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$source = $this->_element->createElement('source');
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$title = $this->_element->createElement('title', $dataentry->source['title']);
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$source->appendChild($title);
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$link = $this->_element->createElement('link', $dataentry->source['title']);
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$link->setAttribute('rel', 'alternate');
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$link->setAttribute('href', $dataentry->source['url']);
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$source->appendChild($link);
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}
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if (isset($dataentry->enclosure)) {
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foreach ($dataentry->enclosure as $enclosure) {
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$node = $this->_element->createElement('link');
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$node->setAttribute('rel', 'enclosure');
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$node->setAttribute('href', $enclosure['url']);
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if (isset($enclosure['type'])) {
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$node->setAttribute('type', $enclosure['type']);
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}
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if (isset($enclosure['length'])) {
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$node->setAttribute('length', $enclosure['length']);
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}
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$entry->appendChild($node);
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}
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}
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if (isset($dataentry->comments)) {
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$comments = $this->_element->createElementNS('http://wellformedweb.org/CommentAPI/',
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'wfw:comment',
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$dataentry->comments);
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$entry->appendChild($comments);
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}
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if (isset($dataentry->commentRss)) {
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$comments = $this->_element->createElementNS('http://wellformedweb.org/CommentAPI/',
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'wfw:commentRss',
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$dataentry->commentRss);
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$entry->appendChild($comments);
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}
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$root->appendChild($entry);
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}
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}
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/**
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* Override Zend_Feed_Element to allow formated feeds
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*
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* @return string
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*/
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public function saveXml()
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{
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// Return a complete document including XML prologue.
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$doc = new DOMDocument($this->_element->ownerDocument->version,
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$this->_element->ownerDocument->actualEncoding);
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$doc->appendChild($doc->importNode($this->_element, true));
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$doc->formatOutput = true;
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return $doc->saveXML();
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}
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/**
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* Send feed to a http client with the correct header
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*
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* @return void
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* @throws Zend_Feed_Exception if headers have already been sent
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*/
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public function send()
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{
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if (headers_sent()) {
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/**
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* @see Zend_Feed_Exception
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*/
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require_once 'Zend/Feed/Exception.php';
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throw new Zend_Feed_Exception('Cannot send ATOM because headers have already been sent.');
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}
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header('Content-Type: application/atom+xml; charset=' . $this->_element->ownerDocument->actualEncoding);
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echo $this->saveXML();
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}
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}
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