classes/xdb.php

   1 <?php
   2 /***************************************************************************
   3  *  Copyright (C) 2003-2007 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 & 1) {
  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', '_db_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             return false;
  80         }
  81
  82         if ($globals->debug & 1) {
  83             $explain = array();
  84             if (strpos($query, 'FOUND_ROWS()') === false) {
  85                 $res = XDB::$mysqli->query("EXPLAIN $query");
  86                 if ($res) {
  87                     while ($row = $res->fetch_assoc()) {
  88                         $explain[] = $row;
  89                     }
  90                     $res->free();
  91                 }
  92             }
  93             PlBacktrace::$bt['MySQL']->start(XDB::_reformatQuery($query));
  94         }
  95
  96         $res = XDB::$mysqli->query($query);
  97
  98         if ($globals->debug & 1) {
  99             PlBacktrace::$bt['MySQL']->stop(@$res->num_rows ? $res->num_rows : XDB::$mysqli->affected_rows,
 100                                             XDB::$mysqli->error,
 101                                             $explain);
 102         }
 103         return $res;
 104     }
 105
 106     public static function query()
 107     {
 108         return new XOrgDBResult(XDB::_prepare(func_get_args()));
 109     }
 110
 111     public static function execute()
 112     {
 113         return XDB::_query(XDB::_prepare(func_get_args()));
 114     }
 115
 116     public static function iterator()
 117     {
 118         return new XOrgDBIterator(XDB::_prepare(func_get_args()));
 119     }
 120
 121     public static function iterRow()
 122     {
 123         return new XOrgDBIterator(XDB::_prepare(func_get_args()), MYSQL_NUM);
 124     }
 125
 126     public static function insertId()
 127     {
 128         return XDB::$mysqli->insert_id;
 129     }
 130
 131     public static function errno()
 132     {
 133         return XDB::$mysqli->errno;
 134     }
 135
 136     public static function error()
 137     {
 138         return XDB::$mysqli->error;
 139     }
 140
 141     public static function affectedRows()
 142     {
 143         return XDB::$mysqli->affected_rows;
 144     }
 145
 146     public static function _db_escape($var)
 147     {
 148         switch (gettype($var)) {
 149           case 'boolean':
 150             return $var ? 1 : 0;
 151
 152           case 'integer':
 153           case 'double':
 154           case 'float':
 155             return $var;
 156
 157           case 'string':
 158             return "'".addslashes($var)."'";
 159
 160           case 'NULL':
 161             return 'NULL';
 162
 163           case 'object':
 164           case 'array':
 165             return "'".addslashes(serialize($var))."'";
 166
 167           default:
 168             die(var_export($var, true).' is not a valid for a database entry');
 169         }
 170     }
 171 }
 172
 173 class XOrgDBResult
 174 {
 175
 176     private $_res;
 177
 178     function XOrgDBResult($query)
 179     {
 180         $this->_res = XDB::_query($query);
 181     }
 182
 183     function free()
 184     {
 185         $this->_res->free();
 186         unset($this);
 187     }
 188
 189     function _fetchRow()
 190     {
 191         return $this->_res->fetch_row();
 192     }
 193
 194     function _fetchAssoc()
 195     {
 196         return $this->_res->fetch_assoc();
 197     }
 198
 199     function fetchAllRow()
 200     {
 201         $result = Array();
 202         while ($result[] = $this->_res->fetch_row());
 203         array_pop($result);
 204         $this->free();
 205         return $result;
 206     }
 207
 208     function fetchAllAssoc()
 209     {
 210         $result = Array();
 211         while ($result[] = $this->_res->fetch_assoc());
 212         array_pop($result);
 213         $this->free();
 214         return $result;
 215     }
 216
 217     function fetchOneAssoc()
 218     {
 219         $tmp = $this->_fetchAssoc();
 220         $this->free();
 221         return $tmp;
 222     }
 223
 224     function fetchOneRow()
 225     {
 226         $tmp = $this->_fetchRow();
 227         $this->free();
 228         return $tmp;
 229     }
 230
 231     function fetchOneCell()
 232     {
 233         $tmp = $this->_fetchRow();
 234         $this->free();
 235         return $tmp[0];
 236     }
 237
 238     function fetchColumn($key = 0)
 239     {
 240         $res = Array();
 241         if (is_numeric($key)) {
 242             while($tmp = $this->_fetchRow()) {
 243                 $res[] = $tmp[$key];
 244             }
 245         } else {
 246             while($tmp = $this->_fetchAssoc()) {
 247                 $res[] = $tmp[$key];
 248             }
 249         }
 250         $this->free();
 251         return $res;
 252     }
 253
 254     function fetchOneField()
 255     {
 256         return $this->_res->fetch_field();
 257     }
 258
 259     function fetchFields()
 260     {
 261         $res = array();
 262         while ($res[] = $this->fetchOneField());
 263         return $res;
 264     }
 265
 266     function numRows()
 267     {
 268         return $this->_res->num_rows;
 269     }
 270
 271     function fieldCount()
 272     {
 273         return $this->_res->field_count;
 274     }
 275 }
 276
 277 require_once dirname(__FILE__) . '/pliterator.php';
 278
 279 class XOrgDBIterator implements PlIterator
 280 {
 281     private $_result;
 282     private $_pos;
 283     private $_total;
 284     private $_fpos;
 285     private $_fields;
 286     private $_mode = MYSQL_ASSOC;
 287
 288     function __construct($query, $mode = MYSQL_ASSOC)
 289     {
 290         $this->_result = new XOrgDBResult($query);
 291         $this->_pos    = 0;
 292         $this->_total  = $this->_result->numRows();
 293         $this->_fpost  = 0;
 294         $this->_fields = $this->_result->fieldCount();
 295         $this->_mode   = $mode;
 296     }
 297
 298     function next()
 299     {
 300         $this->_pos ++;
 301         if ($this->_pos > $this->_total) {
 302             $this->_result->free();
 303             unset($this);
 304             return null;
 305         }
 306         return $this->_mode != MYSQL_ASSOC ? $this->_result->_fetchRow() : $this->_result->_fetchAssoc();
 307     }
 308
 309     function first()
 310     {
 311         return $this->_pos == 1;
 312     }
 313
 314     function last()
 315     {
 316         return $this->_pos == $this->_total;
 317     }
 318
 319     function total()
 320     {
 321         return $this->_total;
 322     }
 323
 324     function nextField()
 325     {
 326         $this->_fpos++;
 327         if ($this->_fpos > $this->_fields) {
 328             return null;
 329         }
 330         return $this->_result->fetchOneField();
 331     }
 332
 333     function firstField()
 334     {
 335         return $this->_fpos == 1;
 336     }
 337
 338     function lastField()
 339     {
 340         return $this->_fpos == $this->_fields;
 341     }
 342
 343     function totalFields()
 344     {
 345         return $this->_fields;
 346     }
 347 }
 348
 349 // vim:set et sw=4 sts=4 sws=4 foldmethod=marker enc=utf-8:
 350 ?>