1 <?php
2 /**
3 * SimplePie
4 *
5 * A PHP-Based RSS and Atom Feed Framework.
6 * Takes the hard work out of managing a complete RSS/Atom solution.
7 *
8 * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
9 * All rights reserved.
10 *
11 * Redistribution and use in source and binary forms, with or without modification, are
12 * permitted provided that the following conditions are met:
13 *
14 * * Redistributions of source code must retain the above copyright notice, this list of
15 * conditions and the following disclaimer.
16 *
17 * * Redistributions in binary form must reproduce the above copyright notice, this list
18 * of conditions and the following disclaimer in the documentation and/or other materials
19 * provided with the distribution.
20 *
21 * * Neither the name of the SimplePie Team nor the names of its contributors may be used
22 * to endorse or promote products derived from this software without specific prior
23 * written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
26 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
27 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
28 * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
29 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
30 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
31 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
32 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33 * POSSIBILITY OF SUCH DAMAGE.
34 *
35 * @package SimplePie
36 * @version 1.3.1
37 * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
38 * @author Ryan Parman
39 * @author Geoffrey Sneddon
40 * @author Ryan McCue
41 * @link http://simplepie.org/ SimplePie
42 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
43 */
44
45 /**
46 * Base class for database-based caches
47 *
48 * @package SimplePie
49 * @subpackage Caching
50 */
51 abstract class SimplePie_Cache_DB implements SimplePie_Cache_Base
52 {
53 /**
54 * Helper for database conversion
55 *
56 * Converts a given {@see SimplePie} object into data to be stored
57 *
58 * @param SimplePie $data
59 * @return array First item is the serialized data for storage, second item is the unique ID for this item
60 */
61 protected static function prepare_simplepie_object_for_cache($data)
62 {
63 $items = $data->get_items();
64 $items_by_id = array();
65
66 if (!empty($items))
67 {
68 foreach ($items as $item)
69 {
70 $items_by_id[$item->get_id()] = $item;
71 }
72
73 if (count($items_by_id) !== count($items))
74 {
75 $items_by_id = array();
76 foreach ($items as $item)
77 {
78 $items_by_id[$item->get_id(true)] = $item;
79 }
80 }
81
82 if (isset($data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0]))
83 {
84 $channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0];
85 }
86 elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0]))
87 {
88 $channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0];
89 }
90 elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]))
91 {
92 $channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0];
93 }
94 elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['channel'][0]))
95 {
96 $channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['channel'][0];
97 }
98 else
99 {
100 $channel = null;
101 }
102
103 if ($channel !== null)
104 {
105 if (isset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry']))
106 {
107 unset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry']);
108 }
109 if (isset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['entry']))
110 {
111 unset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['entry']);
112 }
113 if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item']))
114 {
115 unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item']);
116 }
117 if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item']))
118 {
119 unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item']);
120 }
121 if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_20]['item']))
122 {
123 unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_20]['item']);
124 }
125 }
126 if (isset($data->data['items']))
127 {
128 unset($data->data['items']);
129 }
130 if (isset($data->data['ordered_items']))
131 {
132 unset($data->data['ordered_items']);
133 }
134 }
135 return array(serialize($data->data), $items_by_id);
136 }
137 }
138