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<?php
// SPDX-FileCopyrightText: 2004-2023 Ryan Parman, Sam Sneddon, Ryan McCue
// SPDX-License-Identifier: BSD-3-Clause
declare(strict_types=1);
namespace SimplePie\Cache;
use SimplePie\Item;
/**
* Base class for database-based caches
*
* @deprecated since SimplePie 1.8.0, use implementation of "Psr\SimpleCache\CacheInterface" instead
*/
abstract class DB implements Base
{
/**
* Helper for database conversion
*
* Converts a given {@see SimplePie} object into data to be stored
*
* @param \SimplePie\SimplePie $data
* @return array{string, array<string, Item>} 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(\SimplePie\SimplePie $data)
{
$items = $data->get_items();
$items_by_id = [];
if (!empty($items)) {
foreach ($items as $item) {
$items_by_id[$item->get_id()] = $item;
}
if (count($items_by_id) !== count($items)) {
$items_by_id = [];
foreach ($items as $item) {
$items_by_id[$item->get_id(true)] = $item;
}
}
if (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0])) {
$channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0];
} elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0])) {
$channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0];
} elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0])) {
$channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0];
} elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0]['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['channel'][0])) {
$channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0]['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['channel'][0];
} else {
$channel = null;
}
if ($channel !== null) {
if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry'])) {
unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry']);
}
if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['entry'])) {
unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['entry']);
}
if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_10]['item'])) {
unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_10]['item']);
}
if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_090]['item'])) {
unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_090]['item']);
}
if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['item'])) {
unset($channel['child'][\SimplePie\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 [serialize($data->data), $items_by_id];
}
}
class_alias('SimplePie\Cache\DB', 'SimplePie_Cache_DB');
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