AtomParser.php
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<?php
/**
* Joomla! Content Management System
*
* @copyright Copyright (C) 2005 - 2019 Open Source Matters, Inc. All rights reserved.
* @license GNU General Public License version 2 or later; see LICENSE.txt
*/
namespace Joomla\CMS\Feed\Parser;
defined('JPATH_PLATFORM') or die;
use Joomla\CMS\Feed\Feed;
use Joomla\CMS\Feed\FeedEntry;
use Joomla\CMS\Feed\FeedLink;
use Joomla\CMS\Feed\FeedParser;
/**
* ATOM Feed Parser class.
*
* @link http://www.atomenabled.org/developers/syndication/
* @since 3.1.4
*/
class AtomParser extends FeedParser
{
/**
* @var string The feed format version.
* @since 3.1.4
*/
protected $version;
/**
* Method to handle the `<author>` element for the feed.
*
* @param Feed $feed The Feed object being built from the parsed feed.
* @param \SimpleXMLElement $el The current XML element object to handle.
*
* @return void
*
* @since 3.1.4
*/
protected function handleAuthor(Feed $feed, \SimpleXMLElement $el)
{
// Set the author information from the XML element.
$feed->setAuthor((string) $el->name, (string) $el->email, (string) $el->uri);
}
/**
* Method to handle the `<contributor>` element for the feed.
*
* @param Feed $feed The Feed object being built from the parsed feed.
* @param \SimpleXMLElement $el The current XML element object to handle.
*
* @return void
*
* @since 3.1.4
*/
protected function handleContributor(Feed $feed, \SimpleXMLElement $el)
{
$feed->addContributor((string) $el->name, (string) $el->email, (string) $el->uri);
}
/**
* Method to handle the `<generator>` element for the feed.
*
* @param Feed $feed The Feed object being built from the parsed feed.
* @param \SimpleXMLElement $el The current XML element object to handle.
*
* @return void
*
* @since 3.1.4
*/
protected function handleGenerator(Feed $feed, \SimpleXMLElement $el)
{
$feed->generator = (string) $el;
}
/**
* Method to handle the `<id>` element for the feed.
*
* @param Feed $feed The Feed object being built from the parsed feed.
* @param \SimpleXMLElement $el The current XML element object to handle.
*
* @return void
*
* @since 3.1.4
*/
protected function handleId(Feed $feed, \SimpleXMLElement $el)
{
$feed->uri = (string) $el;
}
/**
* Method to handle the `<link>` element for the feed.
*
* @param Feed $feed The Feed object being built from the parsed feed.
* @param \SimpleXMLElement $el The current XML element object to handle.
*
* @return void
*
* @since 3.1.4
*/
protected function handleLink(Feed $feed, \SimpleXMLElement $el)
{
$link = new FeedLink;
$link->uri = (string) $el['href'];
$link->language = (string) $el['hreflang'];
$link->length = (int) $el['length'];
$link->relation = (string) $el['rel'];
$link->title = (string) $el['title'];
$link->type = (string) $el['type'];
$feed->link = $link;
}
/**
* Method to handle the `<rights>` element for the feed.
*
* @param Feed $feed The Feed object being built from the parsed feed.
* @param \SimpleXMLElement $el The current XML element object to handle.
*
* @return void
*
* @since 3.1.4
*/
protected function handleRights(Feed $feed, \SimpleXMLElement $el)
{
$feed->copyright = (string) $el;
}
/**
* Method to handle the `<subtitle>` element for the feed.
*
* @param Feed $feed The Feed object being built from the parsed feed.
* @param \SimpleXMLElement $el The current XML element object to handle.
*
* @return void
*
* @since 3.1.4
*/
protected function handleSubtitle(Feed $feed, \SimpleXMLElement $el)
{
$feed->description = (string) $el;
}
/**
* Method to handle the `<title>` element for the feed.
*
* @param Feed $feed The Feed object being built from the parsed feed.
* @param \SimpleXMLElement $el The current XML element object to handle.
*
* @return void
*
* @since 3.1.4
*/
protected function handleTitle(Feed $feed, \SimpleXMLElement $el)
{
$feed->title = (string) $el;
}
/**
* Method to handle the `<updated>` element for the feed.
*
* @param Feed $feed The Feed object being built from the parsed feed.
* @param \SimpleXMLElement $el The current XML element object to handle.
*
* @return void
*
* @since 3.1.4
*/
protected function handleUpdated(Feed $feed, \SimpleXMLElement $el)
{
$feed->updatedDate = (string) $el;
}
/**
* Method to initialise the feed for parsing. Here we detect the version and advance the stream
* reader so that it is ready to parse feed elements.
*
* @return void
*
* @since 3.1.4
*/
protected function initialise()
{
// Read the version attribute.
$this->version = ($this->stream->getAttribute('version') == '0.3') ? '0.3' : '1.0';
// We want to move forward to the first element after the root element.
$this->moveToNextElement();
}
/**
* Method to handle a `<entry>` element for the feed.
*
* @param FeedEntry $entry The FeedEntry object being built from the parsed feed entry.
* @param \SimpleXMLElement $el The current XML element object to handle.
*
* @return void
*
* @since 3.1.4
*/
protected function processFeedEntry(FeedEntry $entry, \SimpleXMLElement $el)
{
$entry->uri = (string) $el->id;
$entry->title = (string) $el->title;
$entry->updatedDate = (string) $el->updated;
$entry->content = (string) $el->summary;
if (!$entry->content)
{
$entry->content = (string) $el->content;
}
if (filter_var($entry->uri, FILTER_VALIDATE_URL) === false && !is_null($el->link) && $el->link)
{
$link = $el->link;
if (is_array($link))
{
$link = $this->bestLinkForUri($link);
}
$uri = (string) $link['href'];
if ($uri)
{
$entry->uri = $uri;
}
}
}
/**
* If there is more than one <link> in the feed entry, find the most appropriate one and return it.
*
* @param array $links Array of <link> elements from the feed entry.
*
* @return \SimpleXMLElement
*/
private function bestLinkForUri(array $links)
{
$linkPrefs = array('', 'self', 'alternate');
foreach ($linkPrefs as $pref)
{
foreach ($links as $link)
{
$rel = (string) $link['rel'];
if ($rel === $pref)
{
return $link;
}
}
}
return array_shift($links);
}
}