5 * A PHP-Based RSS and Atom Feed Framework.
6 * Takes the hard work out of managing a complete RSS/Atom solution.
8 * Copyright (c) 2004-2012, Ryan Parman, Geoffrey Sneddon, Ryan McCue, and contributors
11 * Redistribution and use in source and binary forms, with or without modification, are
12 * permitted provided that the following conditions are met:
14 * * Redistributions of source code must retain the above copyright notice, this list of
15 * conditions and the following disclaimer.
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.
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
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.
37 * @copyright 2004-2012 Ryan Parman, Geoffrey Sneddon, Ryan McCue
39 * @author Geoffrey Sneddon
41 * @link http://simplepie.org/ SimplePie
42 * @license http://www.opensource.org/licenses/bsd-license.php BSD License
46 * Base class for database-based caches
51 abstract class SimplePie_Cache_DB implements SimplePie_Cache_Base
54 * Helper for database conversion
56 * Converts a given {@see SimplePie} object into data to be stored
58 * @param SimplePie $data
59 * @return array First item is the serialized data for storage, second item is the unique ID for this item
61 protected static function prepare_simplepie_object_for_cache($data)
63 $items = $data->get_items();
64 $items_by_id = array();
68 foreach ($items as $item)
70 $items_by_id[$item->get_id()] = $item;
73 if (count($items_by_id) !== count($items))
75 $items_by_id = array();
76 foreach ($items as $item)
78 $items_by_id[$item->get_id(true)] = $item;
82 if (isset($data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0]))
84 $channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0];
86 elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0]))
88 $channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0];
90 elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]))
92 $channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0];
94 elseif (isset($data->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['channel'][0]))
96 $channel =& $data->data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]['child'][SIMPLEPIE_NAMESPACE_RSS_20]['channel'][0];
103 if ($channel !== null)
105 if (isset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry']))
107 unset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry']);
109 if (isset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['entry']))
111 unset($channel['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['entry']);
113 if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item']))
115 unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_10]['item']);
117 if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item']))
119 unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_090]['item']);
121 if (isset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_20]['item']))
123 unset($channel['child'][SIMPLEPIE_NAMESPACE_RSS_20]['item']);
126 if (isset($data->data['items']))
128 unset($data->data['items']);
130 if (isset($data->data['ordered_items']))
132 unset($data->data['ordered_items']);
135 return array(serialize($data->data), $items_by_id);