xref: /dokuwiki/vendor/simplepie/simplepie/src/Cache/DB.php (revision 8e88a29b81301f78509349ab1152bb09c229123e) 
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