inc/3rdparty/simplepie/SimplePie/Cache/MySQL.php

   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) 2004-2009, 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-dev
  37  * @copyright 2004-2010 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  * @todo phpDoc comments
  44  */
  45
  46
  47 class SimplePie_Cache_MySQL extends SimplePie_Cache_DB
  48 {
  49         protected $mysql;
  50         protected $options;
  51         protected $id;
  52
  53         public function __construct($url, $name, $extension)
  54         {
  55                 $this->options = array(
  56                         'user' => null,
  57                         'pass' => null,
  58                         'host' => '127.0.0.1',
  59                         'port' => '3306',
  60                         'path' => '',
  61                         'extras' => array(
  62                                 'prefix' => '',
  63                         ),
  64                 );
  65                 $this->options = array_merge_recursive($this->options, SimplePie_Cache::parse_URL($url));
  66
  67                 // Path is prefixed with a "/"
  68                 $this->options['dbname'] = substr($this->options['path'], 1);
  69
  70                 try
  71                 {
  72                         $this->mysql = new PDO("mysql:dbname={$this->options['dbname']};host={$this->options['host']};port={$this->options['port']}", $this->options['user'], $this->options['pass'], array(PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8'));
  73                 }
  74                 catch (PDOException $e)
  75                 {
  76                         $this->mysql = null;
  77                         return;
  78                 }
  79
  80                 $this->id = $name . $extension;
  81
  82                 if (!$query = $this->mysql->query('SHOW TABLES'))
  83                 {
  84                         $this->mysql = null;
  85                         return;
  86                 }
  87
  88                 $db = array();
  89                 while ($row = $query->fetchColumn())
  90                 {
  91                         $db[] = $row;
  92                 }
  93
  94                 if (!in_array($this->options['extras']['prefix'] . 'cache_data', $db))
  95                 {
  96                         $query = $this->mysql->exec('CREATE TABLE `' . $this->options['extras']['prefix'] . 'cache_data` (`id` TEXT CHARACTER SET utf8 NOT NULL, `items` SMALLINT NOT NULL DEFAULT 0, `data` BLOB NOT NULL, `mtime` INT UNSIGNED NOT NULL, UNIQUE (`id`(125)))');
  97                         if ($query === false)
  98                         {
  99                                 $this->mysql = null;
 100                         }
 101                 }
 102
 103                 if (!in_array($this->options['extras']['prefix'] . 'items', $db))
 104                 {
 105                         $query = $this->mysql->exec('CREATE TABLE `' . $this->options['extras']['prefix'] . 'items` (`feed_id` TEXT CHARACTER SET utf8 NOT NULL, `id` TEXT CHARACTER SET utf8 NOT NULL, `data` TEXT CHARACTER SET utf8 NOT NULL, `posted` INT UNSIGNED NOT NULL, INDEX `feed_id` (`feed_id`(125)))');
 106                         if ($query === false)
 107                         {
 108                                 $this->mysql = null;
 109                         }
 110                 }
 111         }
 112
 113         public function save($data)
 114         {
 115                 if ($this->mysql === null)
 116                 {
 117                         return false;
 118                 }
 119
 120                 if (is_a($data, 'SimplePie'))
 121                 {
 122                         $data = clone $data;
 123
 124                         $prepared = self::prepare_simplepie_object_for_cache($data);
 125
 126                         $query = $this->mysql->prepare('SELECT COUNT(*) FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :feed');
 127                         $query->bindValue(':feed', $this->id);
 128                         if ($query->execute())
 129                         {
 130                                 if ($query->fetchColumn() > 0)
 131                                 {
 132                                         $items = count($prepared[1]);
 133                                         if ($items)
 134                                         {
 135                                                 $sql = 'UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `items` = :items, `data` = :data, `mtime` = :time WHERE `id` = :feed';
 136                                                 $query = $this->mysql->prepare($sql);
 137                                                 $query->bindValue(':items', $items);
 138                                         }
 139                                         else
 140                                         {
 141                                                 $sql = 'UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `data` = :data, `mtime` = :time WHERE `id` = :feed';
 142                                                 $query = $this->mysql->prepare($sql);
 143                                         }
 144
 145                                         $query->bindValue(':data', $prepared[0]);
 146                                         $query->bindValue(':time', time());
 147                                         $query->bindValue(':feed', $this->id);
 148                                         if (!$query->execute())
 149                                         {
 150                                                 return false;
 151                                         }
 152                                 }
 153                                 else
 154                                 {
 155                                         $query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'cache_data` (`id`, `items`, `data`, `mtime`) VALUES(:feed, :count, :data, :time)');
 156                                         $query->bindValue(':feed', $this->id);
 157                                         $query->bindValue(':count', count($prepared[1]));
 158                                         $query->bindValue(':data', $prepared[0]);
 159                                         $query->bindValue(':time', time());
 160                                         if (!$query->execute())
 161                                         {
 162                                                 return false;
 163                                         }
 164                                 }
 165
 166                                 $ids = array_keys($prepared[1]);
 167                                 if (!empty($ids))
 168                                 {
 169                                         foreach ($ids as $id)
 170                                         {
 171                                                 $database_ids[] = $this->mysql->quote($id);
 172                                         }
 173
 174                                         $query = $this->mysql->prepare('SELECT `id` FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `id` = ' . implode(' OR `id` = ', $database_ids) . ' AND `feed_id` = :feed');
 175                                         $query->bindValue(':feed', $this->id);
 176
 177                                         if ($query->execute())
 178                                         {
 179                                                 $existing_ids = array();
 180                                                 while ($row = $query->fetchColumn())
 181                                                 {
 182                                                         $existing_ids[] = $row;
 183                                                 }
 184
 185                                                 $new_ids = array_diff($ids, $existing_ids);
 186
 187                                                 foreach ($new_ids as $new_id)
 188                                                 {
 189                                                         if (!($date = $prepared[1][$new_id]->get_date('U')))
 190                                                         {
 191                                                                 $date = time();
 192                                                         }
 193
 194                                                         $query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'items` (`feed_id`, `id`, `data`, `posted`) VALUES(:feed, :id, :data, :date)');
 195                                                         $query->bindValue(':feed', $this->id);
 196                                                         $query->bindValue(':id', $new_id);
 197                                                         $query->bindValue(':data', serialize($prepared[1][$new_id]->data));
 198                                                         $query->bindValue(':date', $date);
 199                                                         if (!$query->execute())
 200                                                         {
 201                                                                 return false;
 202                                                         }
 203                                                 }
 204                                                 return true;
 205                                         }
 206                                 }
 207                                 else
 208                                 {
 209                                         return true;
 210                                 }
 211                         }
 212                 }
 213                 else
 214                 {
 215                         $query = $this->mysql->prepare('SELECT `id` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :feed');
 216                         $query->bindValue(':feed', $this->id);
 217                         if ($query->execute())
 218                         {
 219                                 if ($query->rowCount() > 0)
 220                                 {
 221                                         $query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `items` = 0, `data` = :data, `mtime` = :time WHERE `id` = :feed');
 222                                         $query->bindValue(':data', serialize($data));
 223                                         $query->bindValue(':time', time());
 224                                         $query->bindValue(':feed', $this->id);
 225                                         if ($this->execute())
 226                                         {
 227                                                 return true;
 228                                         }
 229                                 }
 230                                 else
 231                                 {
 232                                         $query = $this->mysql->prepare('INSERT INTO `' . $this->options['extras']['prefix'] . 'cache_data` (`id`, `items`, `data`, `mtime`) VALUES(:id, 0, :data, :time)');
 233                                         $query->bindValue(':id', $this->id);
 234                                         $query->bindValue(':data', serialize($data));
 235                                         $query->bindValue(':time', time());
 236                                         if ($query->execute())
 237                                         {
 238                                                 return true;
 239                                         }
 240                                 }
 241                         }
 242                 }
 243                 return false;
 244         }
 245
 246         public function load()
 247         {
 248                 if ($this->mysql === null)
 249                 {
 250                         return false;
 251                 }
 252
 253                 $query = $this->mysql->prepare('SELECT `items`, `data` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
 254                 $query->bindValue(':id', $this->id);
 255                 if ($query->execute() && ($row = $query->fetch()))
 256                 {
 257                         $data = unserialize($row[1]);
 258
 259                         if (isset($this->options['items'][0]))
 260                         {
 261                                 $items = (int) $this->options['items'][0];
 262                         }
 263                         else
 264                         {
 265                                 $items = (int) $row[0];
 266                         }
 267
 268                         if ($items !== 0)
 269                         {
 270                                 if (isset($data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0]))
 271                                 {
 272                                         $feed =& $data['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['feed'][0];
 273                                 }
 274                                 elseif (isset($data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0]))
 275                                 {
 276                                         $feed =& $data['child'][SIMPLEPIE_NAMESPACE_ATOM_03]['feed'][0];
 277                                 }
 278                                 elseif (isset($data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0]))
 279                                 {
 280                                         $feed =& $data['child'][SIMPLEPIE_NAMESPACE_RDF]['RDF'][0];
 281                                 }
 282                                 elseif (isset($data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0]))
 283                                 {
 284                                         $feed =& $data['child'][SIMPLEPIE_NAMESPACE_RSS_20]['rss'][0];
 285                                 }
 286                                 else
 287                                 {
 288                                         $feed = null;
 289                                 }
 290
 291                                 if ($feed !== null)
 292                                 {
 293                                         $sql = 'SELECT `data` FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `feed_id` = :feed ORDER BY `posted` DESC';
 294                                         if ($items > 0)
 295                                         {
 296                                                 $sql .= ' LIMIT ' . $items;
 297                                         }
 298
 299                                         $query = $this->mysql->prepare($sql);
 300                                         $query->bindValue(':feed', $this->id);
 301                                         if ($query->execute())
 302                                         {
 303                                                 while ($row = $query->fetchColumn())
 304                                                 {
 305                                                         $feed['child'][SIMPLEPIE_NAMESPACE_ATOM_10]['entry'][] = unserialize($row);
 306                                                 }
 307                                         }
 308                                         else
 309                                         {
 310                                                 return false;
 311                                         }
 312                                 }
 313                         }
 314                         return $data;
 315                 }
 316                 return false;
 317         }
 318
 319         public function mtime()
 320         {
 321                 if ($this->mysql === null)
 322                 {
 323                         return false;
 324                 }
 325
 326                 $query = $this->mysql->prepare('SELECT `mtime` FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
 327                 $query->bindValue(':id', $this->id);
 328                 if ($query->execute() && ($time = $query->fetchColumn()))
 329                 {
 330                         return $time;
 331                 }
 332                 else
 333                 {
 334                         return false;
 335                 }
 336         }
 337
 338         public function touch()
 339         {
 340                 if ($this->mysql === null)
 341                 {
 342                         return false;
 343                 }
 344
 345                 $query = $this->mysql->prepare('UPDATE `' . $this->options['extras']['prefix'] . 'cache_data` SET `mtime` = :time WHERE `id` = :id');
 346                 $query->bindValue(':time', time());
 347                 $query->bindValue(':id', $this->id);
 348                 if ($query->execute() && $query->rowCount() > 0)
 349                 {
 350                         return true;
 351                 }
 352                 else
 353                 {
 354                         return false;
 355                 }
 356         }
 357
 358         public function unlink()
 359         {
 360                 if ($this->mysql === null)
 361                 {
 362                         return false;
 363                 }
 364
 365                 $query = $this->mysql->prepare('DELETE FROM `' . $this->options['extras']['prefix'] . 'cache_data` WHERE `id` = :id');
 366                 $query->bindValue(':id', $this->id);
 367                 $query2 = $this->mysql->prepare('DELETE FROM `' . $this->options['extras']['prefix'] . 'items` WHERE `feed_id` = :id');
 368                 $query2->bindValue(':id', $this->id);
 369                 if ($query->execute() && $query2->execute())
 370                 {
 371                         return true;
 372                 }
 373                 else
 374                 {
 375                         return false;
 376                 }
 377         }
 378 }