1<?php
  2
  3// SPDX-FileCopyrightText: 2004-2023 Ryan Parman, Sam Sneddon, Ryan McCue
  4// SPDX-License-Identifier: BSD-3-Clause
  5
  6declare(strict_types=1);
  7
  8namespace SimplePie\Cache;
  9
 10use SimplePie\Item;
 11
 12/**
 13 * Base class for database-based caches
 14 *
 15 * @deprecated since SimplePie 1.8.0, use implementation of "Psr\SimpleCache\CacheInterface" instead
 16 */
 17abstract class DB implements Base
 18{
 19    /**
 20     * Helper for database conversion
 21     *
 22     * Converts a given {@see SimplePie} object into data to be stored
 23     *
 24     * @param \SimplePie\SimplePie $data
 25     * @return array{string, array<string, Item>} First item is the serialized data for storage, second item is the unique ID for this item
 26     */
 27    protected static function prepare_simplepie_object_for_cache(\SimplePie\SimplePie $data)
 28    {
 29        $items = $data->get_items();
 30        $items_by_id = [];
 31
 32        if (!empty($items)) {
 33            foreach ($items as $item) {
 34                $items_by_id[$item->get_id()] = $item;
 35            }
 36
 37            if (count($items_by_id) !== count($items)) {
 38                $items_by_id = [];
 39                foreach ($items as $item) {
 40                    $items_by_id[$item->get_id(true)] = $item;
 41                }
 42            }
 43
 44            if (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0])) {
 45                $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0];
 46            } elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0])) {
 47                $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0];
 48            } elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0])) {
 49                $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0];
 50            } elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0]['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['channel'][0])) {
 51                $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0]['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['channel'][0];
 52            } else {
 53                $channel = null;
 54            }
 55
 56            if ($channel !== null) {
 57                if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry'])) {
 58                    unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry']);
 59                }
 60                if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['entry'])) {
 61                    unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['entry']);
 62                }
 63                if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_10]['item'])) {
 64                    unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_10]['item']);
 65                }
 66                if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_090]['item'])) {
 67                    unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_090]['item']);
 68                }
 69                if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['item'])) {
 70                    unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['item']);
 71                }
 72            }
 73            if (isset($data->data['items'])) {
 74                unset($data->data['items']);
 75            }
 76            if (isset($data->data['ordered_items'])) {
 77                unset($data->data['ordered_items']);
 78            }
 79        }
 80        return [serialize($data->data), $items_by_id];
 81    }
 82}
 83
 84class_alias('SimplePie\Cache\DB', 'SimplePie_Cache_DB');
 85