classes/xdb.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2008 Polytechnique.org                              *
   4  *  http://opensource.polytechnique.org/                                   *
   5  *                                                                         *
   6  *  This program is free software; you can redistribute it and/or modify   *
   7  *  it under the terms of the GNU General Public License as published by   *
   8  *  the Free Software Foundation; either version 2 of the License, or      *
   9  *  (at your option) any later version.                                    *
  10  *                                                                         *
  11  *  This program is distributed in the hope that it will be useful,        *
  12  *  but WITHOUT ANY WARRANTY; without even the implied warranty of         *
  13  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the          *
  14  *  GNU General Public License for more details.                           *
  15  *                                                                         *
  16  *  You should have received a copy of the GNU General Public License      *
  17  *  along with this program; if not, write to the Free Software            *
  18  *  Foundation, Inc.,                                                      *
  19  *  59 Temple Place, Suite 330, Boston, MA  02111-1307  USA                *
  20  **************************************************************************/
  21
  22 class XDB
  23 {
  24     private static $mysqli = null;
  25
  26     public static function connect()
  27     {
  28         global $globals;
  29         XDB::$mysqli = new mysqli($globals->dbhost, $globals->dbuser, $globals->dbpwd, $globals->dbdb);
  30         if ($globals->debug & DEBUG_BT) {
  31             $bt = new PlBacktrace('MySQL');
  32             if (mysqli_connect_errno()) {
  33                 $bt->newEvent("MySQLI connection", 0, mysqli_connect_error());
  34                 return false;
  35             }
  36         }
  37         XDB::$mysqli->autocommit(true);
  38         XDB::$mysqli->set_charset($globals->dbcharset);
  39         return true;
  40     }
  41
  42     public static function _prepare($args)
  43     {
  44         $query    = array_map(Array('XDB', 'escape'), $args);
  45         $query[0] = str_replace('{?}', '%s', str_replace('%',   '%%', $args[0]));
  46         return call_user_func_array('sprintf', $query);
  47     }
  48
  49     public static function _reformatQuery($query)
  50     {
  51         $query  = preg_split("/\n\\s*/", trim($query));
  52         $length = 0;
  53         foreach ($query as $key=>$line) {
  54             $local = -2;
  55             if (preg_match('/^([A-Z]+(?:\s+(?:JOIN|BY|FROM|INTO))?)\s+(.*)/u', $line, $matches)
  56             && $matches[1] != 'AND' && $matches[1] != 'OR')
  57             {
  58                 $local  = strlen($matches[1]);
  59                 $line   = $matches[1] . '  ' . $matches[2];
  60                 $length = max($length, $local);
  61             }
  62             $query[$key] = array($line, $local);
  63         }
  64         $res = '';
  65         foreach ($query as $array) {
  66             list($line, $local) = $array;
  67             $local   = max(0, $length - $local);
  68             $res    .= str_repeat(' ', $local) . $line . "\n";
  69             $length += 2 * (substr_count($line, '(') - substr_count($line, ')'));
  70         }
  71         return $res;
  72     }
  73
  74     public static function _query($query)
  75     {
  76         global $globals;
  77
  78         if (!XDB::$mysqli && !XDB::connect()) {
  79             header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error');
  80             Platal::page()->kill('Impossible de se connecter à la base de données.');
  81             exit;
  82         }
  83
  84         if ($globals->debug & DEBUG_BT) {
  85             $explain = array();
  86             if (strpos($query, 'FOUND_ROWS()') === false) {
  87                 $res = XDB::$mysqli->query("EXPLAIN $query");
  88                 if ($res) {
  89                     while ($row = $res->fetch_assoc()) {
  90                         $explain[] = $row;
  91                     }
  92                     $res->free();
  93                 }
  94             }
  95             PlBacktrace::$bt['MySQL']->start(XDB::_reformatQuery($query));
  96         }
  97
  98         $res = XDB::$mysqli->query($query);
  99
 100         if ($globals->debug & DEBUG_BT) {
 101             PlBacktrace::$bt['MySQL']->stop(@$res->num_rows ? $res->num_rows : XDB::$mysqli->affected_rows,
 102                                             XDB::$mysqli->error,
 103                                             $explain);
 104         }
 105
 106         if ($res === false) {
 107             header($_SERVER['SERVER_PROTOCOL'] . ' 500 Internal Server Error');
 108             if (strpos($query, 'INSERT') === false && strpos($query, 'UPDATE') === false
 109                 && strpos($query, 'REPLACE') === false && strpos($query, 'DELETE') === false) {
 110                 Platal::page()->kill('Erreur lors de l\'interrogation de la base de données');
 111             } else {
 112                 Platal::page()->kill('Erreur lors de l\'écriture dans la base de données');
 113             }
 114             exit;
 115         }
 116         return $res;
 117     }
 118
 119     public static function query()
 120     {
 121         return new XOrgDBResult(XDB::_prepare(func_get_args()));
 122     }
 123
 124     public static function execute()
 125     {
 126         global $globals;
 127         $args = func_get_args();
 128         if ($globals->mode != 'rw' && !strpos($args[0], 'logger')) {
 129             return;
 130         }
 131         return XDB::_query(XDB::_prepare($args));
 132     }
 133
 134     public static function iterator()
 135     {
 136         return new XOrgDBIterator(XDB::_prepare(func_get_args()));
 137     }
 138
 139     public static function iterRow()
 140     {
 141         return new XOrgDBIterator(XDB::_prepare(func_get_args()), MYSQL_NUM);
 142     }
 143
 144     public static function insertId()
 145     {
 146         return XDB::$mysqli->insert_id;
 147     }
 148
 149     public static function errno()
 150     {
 151         return XDB::$mysqli->errno;
 152     }
 153
 154     public static function error()
 155     {
 156         return XDB::$mysqli->error;
 157     }
 158
 159     public static function affectedRows()
 160     {
 161         return XDB::$mysqli->affected_rows;
 162     }
 163
 164     public static function escape($var)
 165     {
 166         switch (gettype($var)) {
 167           case 'boolean':
 168             return $var ? 1 : 0;
 169
 170           case 'integer':
 171           case 'double':
 172           case 'float':
 173             return $var;
 174
 175           case 'string':
 176             return "'".addslashes($var)."'";
 177
 178           case 'NULL':
 179             return 'NULL';
 180
 181           case 'object':
 182             if ($var instanceof PlFlagSet) {
 183                 return "'" . addslashes($var->flags()) . "'";
 184             }
 185           case 'array':
 186             return "'".addslashes(serialize($var))."'";
 187
 188           default:
 189             die(var_export($var, true).' is not a valid for a database entry');
 190         }
 191     }
 192 }
 193
 194 class XOrgDBResult
 195 {
 196
 197     private $_res;
 198
 199     public function __construct($query)
 200     {
 201         $this->_res = XDB::_query($query);
 202     }
 203
 204     public function free()
 205     {
 206         if ($this->_res) {
 207             $this->_res->free();
 208         }
 209         unset($this);
 210     }
 211
 212     protected function _fetchRow()
 213     {
 214         return $this->_res ? $this->_res->fetch_row() : null;
 215     }
 216
 217     protected function _fetchAssoc()
 218     {
 219         return $this->_res ? $this->_res->fetch_assoc() : null;
 220     }
 221
 222     public function fetchAllRow()
 223     {
 224         $result = Array();
 225         if (!$this->_res) {
 226             return $result;
 227         }
 228         while ($result[] = $this->_res->fetch_row());
 229         array_pop($result);
 230         $this->free();
 231         return $result;
 232     }
 233
 234     public function fetchAllAssoc()
 235     {
 236         $result = Array();
 237         if (!$this->_res) {
 238             return $result;
 239         }
 240         while ($result[] = $this->_res->fetch_assoc());
 241         array_pop($result);
 242         $this->free();
 243         return $result;
 244     }
 245
 246     public function fetchOneAssoc()
 247     {
 248         $tmp = $this->_fetchAssoc();
 249         $this->free();
 250         return $tmp;
 251     }
 252
 253     public function fetchOneRow()
 254     {
 255         $tmp = $this->_fetchRow();
 256         $this->free();
 257         return $tmp;
 258     }
 259
 260     public function fetchOneCell()
 261     {
 262         $tmp = $this->_fetchRow();
 263         $this->free();
 264         return $tmp[0];
 265     }
 266
 267     public function fetchColumn($key = 0)
 268     {
 269         $res = Array();
 270         if (is_numeric($key)) {
 271             while($tmp = $this->_fetchRow()) {
 272                 $res[] = $tmp[$key];
 273             }
 274         } else {
 275             while($tmp = $this->_fetchAssoc()) {
 276                 $res[] = $tmp[$key];
 277             }
 278         }
 279         $this->free();
 280         return $res;
 281     }
 282
 283     public function fetchOneField()
 284     {
 285         return $this->_res ? $this->_res->fetch_field() : null;
 286     }
 287
 288     public function fetchFields()
 289     {
 290         $res = array();
 291         while ($res[] = $this->fetchOneField());
 292         return $res;
 293     }
 294
 295     public function numRows()
 296     {
 297         return $this->_res ? $this->_res->num_rows : 0;
 298     }
 299
 300     public function fieldCount()
 301     {
 302         return $this->_res ? $this->_res->field_count : 0;
 303     }
 304 }
 305
 306 require_once dirname(__FILE__) . '/pliterator.php';
 307
 308 class XOrgDBIterator extends XOrgDBResult implements PlIterator
 309 {
 310     private $_result;
 311     private $_pos;
 312     private $_total;
 313     private $_fpos;
 314     private $_fields;
 315     private $_mode = MYSQL_ASSOC;
 316
 317     public function __construct($query, $mode = MYSQL_ASSOC)
 318     {
 319         parent::__construct($query);
 320         $this->_pos    = 0;
 321         $this->_total  = $this->numRows();
 322         $this->_fpost  = 0;
 323         $this->_fields = $this->fieldCount();
 324         $this->_mode   = $mode;
 325     }
 326
 327     public function next()
 328     {
 329         $this->_pos ++;
 330         if ($this->_pos > $this->_total) {
 331             $this->free();
 332             unset($this);
 333             return null;
 334         }
 335         return $this->_mode != MYSQL_ASSOC ? $this->_fetchRow() : $this->_fetchAssoc();
 336     }
 337
 338     public function first()
 339     {
 340         return $this->_pos == 1;
 341     }
 342
 343     public function last()
 344     {
 345         return $this->_pos == $this->_total;
 346     }
 347
 348     public function total()
 349     {
 350         return $this->_total;
 351     }
 352
 353     public function nextField()
 354     {
 355         $this->_fpos++;
 356         if ($this->_fpos > $this->_fields) {
 357             return null;
 358         }
 359         return $this->fetchOneField();
 360     }
 361
 362     public function firstField()
 363     {
 364         return $this->_fpos == 1;
 365     }
 366
 367     public function lastField()
 368     {
 369         return $this->_fpos == $this->_fields;
 370     }
 371
 372     public function totalFields()
 373     {
 374         return $this->_fields;
 375     }
 376 }
 377
 378 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 379 ?>