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   1  <?php
   2  
   3  /**
   4   * SimplePie
   5   *
   6   * A PHP-Based RSS and Atom Feed Framework.
   7   * Takes the hard work out of managing a complete RSS/Atom solution.
   8   *
   9   * Copyright (c) 2004-2022, Ryan Parman, Sam Sneddon, Ryan McCue, and contributors
  10   * All rights reserved.
  11   *
  12   * Redistribution and use in source and binary forms, with or without modification, are
  13   * permitted provided that the following conditions are met:
  14   *
  15   *     * Redistributions of source code must retain the above copyright notice, this list of
  16   *       conditions and the following disclaimer.
  17   *
  18   *     * Redistributions in binary form must reproduce the above copyright notice, this list
  19   *       of conditions and the following disclaimer in the documentation and/or other materials
  20   *       provided with the distribution.
  21   *
  22   *     * Neither the name of the SimplePie Team nor the names of its contributors may be used
  23   *       to endorse or promote products derived from this software without specific prior
  24   *       written permission.
  25   *
  26   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
  27   * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
  28   * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDERS
  29   * AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  30   * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  31   * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  32   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
  33   * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  34   * POSSIBILITY OF SUCH DAMAGE.
  35   *
  36   * @package SimplePie
  37   * @copyright 2004-2016 Ryan Parman, Sam Sneddon, Ryan McCue
  38   * @author Ryan Parman
  39   * @author Sam 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  namespace SimplePie\Cache;
  46  
  47  /**
  48   * Base class for database-based caches
  49   *
  50   * @package SimplePie
  51   * @subpackage Caching
  52   * @deprecated since SimplePie 1.8.0, use implementation of "Psr\SimpleCache\CacheInterface" instead
  53   */
  54  abstract class DB implements Base
  55  {
  56      /**
  57       * Helper for database conversion
  58       *
  59       * Converts a given {@see SimplePie} object into data to be stored
  60       *
  61       * @param \SimplePie\SimplePie $data
  62       * @return array First item is the serialized data for storage, second item is the unique ID for this item
  63       */
  64      protected static function prepare_simplepie_object_for_cache($data)
  65      {
  66          $items = $data->get_items();
  67          $items_by_id = [];
  68  
  69          if (!empty($items)) {
  70              foreach ($items as $item) {
  71                  $items_by_id[$item->get_id()] = $item;
  72              }
  73  
  74              if (count($items_by_id) !== count($items)) {
  75                  $items_by_id = [];
  76                  foreach ($items as $item) {
  77                      $items_by_id[$item->get_id(true)] = $item;
  78                  }
  79              }
  80  
  81              if (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0])) {
  82                  $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['feed'][0];
  83              } elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0])) {
  84                  $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['feed'][0];
  85              } elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0])) {
  86                  $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_RDF]['RDF'][0];
  87              } elseif (isset($data->data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0]['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['channel'][0])) {
  88                  $channel = &$data->data['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['rss'][0]['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['channel'][0];
  89              } else {
  90                  $channel = null;
  91              }
  92  
  93              if ($channel !== null) {
  94                  if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry'])) {
  95                      unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_10]['entry']);
  96                  }
  97                  if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['entry'])) {
  98                      unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_ATOM_03]['entry']);
  99                  }
 100                  if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_10]['item'])) {
 101                      unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_10]['item']);
 102                  }
 103                  if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_090]['item'])) {
 104                      unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_090]['item']);
 105                  }
 106                  if (isset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['item'])) {
 107                      unset($channel['child'][\SimplePie\SimplePie::NAMESPACE_RSS_20]['item']);
 108                  }
 109              }
 110              if (isset($data->data['items'])) {
 111                  unset($data->data['items']);
 112              }
 113              if (isset($data->data['ordered_items'])) {
 114                  unset($data->data['ordered_items']);
 115              }
 116          }
 117          return [serialize($data->data), $items_by_id];
 118      }
 119  }
 120  
 121  class_alias('SimplePie\Cache\DB', 'SimplePie_Cache_DB');