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<?php
/**
* SimplePie
*
* A PHP-Based RSS and Atom Feed Framework.
* Takes the hard work out of managing a complete RSS/Atom solution.
*
* Copyright (c) 2004-2016, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
* All rights reserved.
*
* 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 SimplePie Team 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 HOLDERS
* AND 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.
*
* @package SimplePie
* @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
* @author Ryan Parman
* @author Sam Sneddon
* @author Ryan McCue
* @link http://simplepie.org/ SimplePie
* @license http://www.opensource.org/licenses/bsd-license.php BSD License
*/
/**
* Base class for database-based caches
*
* @package SimplePie
* @subpackage Caching
*/
abstract class SimplePie_Cache_DB implements SimplePie_Cache_Base
{
/**
* Helper for database conversion
*
* Converts a given {@see SimplePie} object into data to be stored
*
* @param SimplePie $data
* @return array First item is the serialized data for storage, second item is the unique ID for this item
*/
protected static function prepare_simplepie_object_for_cache($data)
{
$items = $data->get_items();
$items_by_id = array();
if (!empty($items))
{
foreach ($items as $item)
{
$items_by_id[$item->get_id()] = $item;
}
if (count($items_by_id) !== count($items))
{
$items_by_id = array();
foreach ($items as $item)
{
$items_by_id[$item->get_id(true)] = $item;
}
}
if (isset($data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0]))
{
$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0];
}
elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0]))
{
$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0];
}
elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]))
{
$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0];
}
elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['channel'][0]))
{
$channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['channel'][0];
}
else
{
$channel = null;
}
if ($channel !== null)
{
if (isset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry']))
{
unset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry']);
}
if (isset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['entry']))
{
unset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['entry']);
}
if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item']))
{
unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item']);
}
if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item']))
{
unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item']);
}
if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_20]['item']))
{
unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_20]['item']);
}
}
if (isset($data->data['items']))
{
unset($data->data['items']);
}
if (isset($data->data['ordered_items']))
{
unset($data->data['ordered_items']);
}
}
return array(serialize($data->data), $items_by_id);
}
}
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