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                 $text = 'Erreur lors de l\'interrogation de la base de données';
 111             } else {
 112                 $text = 'Erreur lors de l\'écriture dans la base de données';
 113             }
 114             if ($globals->debug) {
 115                 $text .= '<pre>' . pl_entities(XDB::_reformatQuery($query)) . '</pre>';
 116             }
 117             Platal::page()->kill($text);
 118             exit;
 119         }
 120         return $res;
 121     }
 122
 123     public static function query()
 124     {
 125         return new XOrgDBResult(XDB::_prepare(func_get_args()));
 126     }
 127
 128     public static function execute()
 129     {
 130         global $globals;
 131         $args = func_get_args();
 132         if ($globals->mode != 'rw' && !strpos($args[0], 'logger')) {
 133             return;
 134         }
 135         return XDB::_query(XDB::_prepare($args));
 136     }
 137
 138     public static function iterator()
 139     {
 140         return new XOrgDBIterator(XDB::_prepare(func_get_args()));
 141     }
 142
 143     public static function iterRow()
 144     {
 145         return new XOrgDBIterator(XDB::_prepare(func_get_args()), MYSQL_NUM);
 146     }
 147
 148     public static function insertId()
 149     {
 150         return XDB::$mysqli->insert_id;
 151     }
 152
 153     public static function errno()
 154     {
 155         return XDB::$mysqli->errno;
 156     }
 157
 158     public static function error()
 159     {
 160         return XDB::$mysqli->error;
 161     }
 162
 163     public static function affectedRows()
 164     {
 165         return XDB::$mysqli->affected_rows;
 166     }
 167
 168     public static function escape($var)
 169     {
 170         switch (gettype($var)) {
 171           case 'boolean':
 172             return $var ? 1 : 0;
 173
 174           case 'integer':
 175           case 'double':
 176           case 'float':
 177             return $var;
 178
 179           case 'string':
 180             return "'".addslashes($var)."'";
 181
 182           case 'NULL':
 183             return 'NULL';
 184
 185           case 'object':
 186             if ($var instanceof PlFlagSet) {
 187                 return "'" . addslashes($var->flags()) . "'";
 188             }
 189           case 'array':
 190             return "'".addslashes(serialize($var))."'";
 191
 192           default:
 193             die(var_export($var, true).' is not a valid for a database entry');
 194         }
 195     }
 196 }
 197
 198 class XOrgDBResult
 199 {
 200
 201     private $_res;
 202
 203     public function __construct($query)
 204     {
 205         $this->_res = XDB::_query($query);
 206     }
 207
 208     public function free()
 209     {
 210         if ($this->_res) {
 211             $this->_res->free();
 212         }
 213         unset($this);
 214     }
 215
 216     protected function _fetchRow()
 217     {
 218         return $this->_res ? $this->_res->fetch_row() : null;
 219     }
 220
 221     protected function _fetchAssoc()
 222     {
 223         return $this->_res ? $this->_res->fetch_assoc() : null;
 224     }
 225
 226     public function fetchAllRow()
 227     {
 228         $result = Array();
 229         if (!$this->_res) {
 230             return $result;
 231         }
 232         while ($result[] = $this->_res->fetch_row());
 233         array_pop($result);
 234         $this->free();
 235         return $result;
 236     }
 237
 238     public function fetchAllAssoc()
 239     {
 240         $result = Array();
 241         if (!$this->_res) {
 242             return $result;
 243         }
 244         while ($result[] = $this->_res->fetch_assoc());
 245         array_pop($result);
 246         $this->free();
 247         return $result;
 248     }
 249
 250     public function fetchOneAssoc()
 251     {
 252         $tmp = $this->_fetchAssoc();
 253         $this->free();
 254         return $tmp;
 255     }
 256
 257     public function fetchOneRow()
 258     {
 259         $tmp = $this->_fetchRow();
 260         $this->free();
 261         return $tmp;
 262     }
 263
 264     public function fetchOneCell()
 265     {
 266         $tmp = $this->_fetchRow();
 267         $this->free();
 268         return $tmp[0];
 269     }
 270
 271     public function fetchColumn($key = 0)
 272     {
 273         $res = Array();
 274         if (is_numeric($key)) {
 275             while($tmp = $this->_fetchRow()) {
 276                 $res[] = $tmp[$key];
 277             }
 278         } else {
 279             while($tmp = $this->_fetchAssoc()) {
 280                 $res[] = $tmp[$key];
 281             }
 282         }
 283         $this->free();
 284         return $res;
 285     }
 286
 287     public function fetchOneField()
 288     {
 289         return $this->_res ? $this->_res->fetch_field() : null;
 290     }
 291
 292     public function fetchFields()
 293     {
 294         $res = array();
 295         while ($res[] = $this->fetchOneField());
 296         return $res;
 297     }
 298
 299     public function numRows()
 300     {
 301         return $this->_res ? $this->_res->num_rows : 0;
 302     }
 303
 304     public function fieldCount()
 305     {
 306         return $this->_res ? $this->_res->field_count : 0;
 307     }
 308 }
 309
 310 require_once dirname(__FILE__) . '/pliterator.php';
 311
 312 class XOrgDBIterator extends XOrgDBResult implements PlIterator
 313 {
 314     private $_result;
 315     private $_pos;
 316     private $_total;
 317     private $_fpos;
 318     private $_fields;
 319     private $_mode = MYSQL_ASSOC;
 320
 321     public function __construct($query, $mode = MYSQL_ASSOC)
 322     {
 323         parent::__construct($query);
 324         $this->_pos    = 0;
 325         $this->_total  = $this->numRows();
 326         $this->_fpost  = 0;
 327         $this->_fields = $this->fieldCount();
 328         $this->_mode   = $mode;
 329     }
 330
 331     public function next()
 332     {
 333         $this->_pos ++;
 334         if ($this->_pos > $this->_total) {
 335             $this->free();
 336             unset($this);
 337             return null;
 338         }
 339         return $this->_mode != MYSQL_ASSOC ? $this->_fetchRow() : $this->_fetchAssoc();
 340     }
 341
 342     public function first()
 343     {
 344         return $this->_pos == 1;
 345     }
 346
 347     public function last()
 348     {
 349         return $this->_pos == $this->_total;
 350     }
 351
 352     public function total()
 353     {
 354         return $this->_total;
 355     }
 356
 357     public function nextField()
 358     {
 359         $this->_fpos++;
 360         if ($this->_fpos > $this->_fields) {
 361             return null;
 362         }
 363         return $this->fetchOneField();
 364     }
 365
 366     public function firstField()
 367     {
 368         return $this->_fpos == 1;
 369     }
 370
 371     public function lastField()
 372     {
 373         return $this->_fpos == $this->_fields;
 374     }
 375
 376     public function totalFields()
 377     {
 378         return $this->_fields;
 379     }
 380 }
 381
 382 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 383 ?>