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 }