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<?php
namespace Alpha\Util\Feed;
/**
* RSS 1.0 class for synication.
*
* @since 1.0
*
* @author John Collins <dev@alphaframework.org>
* @license http://www.opensource.org/licenses/bsd-license.php The BSD License
* @copyright Copyright (c) 2018, John Collins (founder of Alpha Framework).
* All rights reserved.
*
* <pre>
* Redistribution and use in source and binary forms, with or
* without modification, are permitted provided that the
* following conditions are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the
* following disclaimer in the documentation and/or other
* materials provided with the distribution.
* * Neither the name of the Alpha Framework nor the names
* of its contributors may be used to endorse or promote
* products derived from this software without specific
* prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
* </pre>
*/
class RSS extends Feed
{
/**
* The XML namespace.
*
* @var string
*
* @since 1.0
*/
protected $nameSpace = 'http://purl.org/rss/1.0/';
/**
* The RDF namespace.
*
* @var string
*
* @since 1.0
*/
private $rdfns = 'http://www.w3.org/1999/02/22-rdf-syntax-ns#';
/**
* The actual root tag used in each feed type.
*
* @var string
*
* @since 1.0
*/
protected $rootTag = '<rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns="http://purl.org/rss/1.0/" />';
/**
* Add a URL to feed item.
*
* @param $url
*
* @since 1.0
*/
private function addToItems($url)
{
if ($this->items == null) {
$container = $this->createFeedElement('items');
$this->root->appendChild($container);
$this->items = $this->rssDoc->createElementNS($this->rdfns, 'Seq');
$container->appendChild($this->items);
}
$item = $this->rssDoc->createElementNS($this->rdfns, 'li');
$this->items->appendChild($item);
$item->setAttribute('resource', $url);
}
/**
* {@inheritdoc}
*/
protected function addItem($title, $link, $description = null, $pubDate = null, $id = null)
{
parent::addItem($title, $link, $description, $pubDate, $id);
$this->addToItems($link);
}
/**
* {@inheritdoc}
*/
protected function createRSSNode($type, $parent, $title, $url, $description, $pubDate = null, $id = null)
{
$parent->setAttributeNS($this->rdfns, 'rdf:about', $url);
parent::createRSSNode($type, $parent, $title, $url, $description, $pubDate);
}
}