<?php

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// SPDX-FileCopyrightText: 2004-2023 Ryan Parman, Sam Sneddon, Ryan McCue

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// SPDX-License-Identifier: BSD-3-Clause

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declare(strict_types=1);

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namespace SimplePie\Cache;

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use SimplePie\Item;

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/**

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* Base class for database-based caches

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*

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* @deprecated since SimplePie 1.8.0, use implementation of "Psr\SimpleCache\CacheInterface" instead

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*/

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abstract class DB implements Base

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{

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/**

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* Helper for database conversion

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*

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* Converts a given {@see SimplePie} object into data to be stored

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*

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* @param \SimplePie\SimplePie $data

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* @return array{string, array<string, Item>} First item is the serialized data for storage, second item is the unique ID for this item

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*/

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protected static function prepare_simplepie_object_for_cache(\SimplePie\SimplePie $data)

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{

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$items = $data->get_items();

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$items_by_id = [];

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if (!empty($items)) {

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foreach ($items as $item) {

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$items_by_id[$item->get_id()] = $item;

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}

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if (count($items_by_id) !== count($items)) {

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$items_by_id = [];

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foreach ($items as $item) {

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$items_by_id[$item->get_id(true)] = $item;

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}

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}

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if (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0])) {

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$channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0];

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} elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0])) {

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$channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0];

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} elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0])) {

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$channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0];

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} elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0]['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['channel'][0])) {

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$channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0]['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['channel'][0];

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} else {

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$channel = null;

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}

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if ($channel !== null) {

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if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry'])) {

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unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry']);

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}

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if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['entry'])) {

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unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['entry']);

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}

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if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_10]['item'])) {

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unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_10]['item']);

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}

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if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_090]['item'])) {

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unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_090]['item']);

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}

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if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['item'])) {

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unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['item']);

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}

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}

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if (isset($data->data['items'])) {

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unset($data->data['items']);

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}

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if (isset($data->data['ordered_items'])) {

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unset($data->data['ordered_items']);

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}

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}

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return [serialize($data->data), $items_by_id];

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}

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}

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class_alias('SimplePie\Cache\DB', 'SimplePie_Cache_DB');

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