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<?php
/**
* MINZ - Copyright 2011 Marien Fressinaud
* Sous licence AGPL3 <http://www.gnu.org/licenses/>
*/
/**
* La classe Model_sql représente le modèle interragissant avec les bases de données
* Seul la connexion MySQL est prise en charge pour le moment
*/
class Minz_ModelPdo {
/**
* Partage la connexion à la base de données entre toutes les instances.
*/
public static $useSharedBd = true;
private static $sharedBd = null;
private static $sharedPrefix;
protected static $sharedDbType;
/**
* $bd variable représentant la base de données
*/
protected $bd;
protected $prefix;
public function dbType() {
return self::$sharedDbType;
}
/**
* Créé la connexion à la base de données à l'aide des variables
* HOST, BASE, USER et PASS définies dans le fichier de configuration
*/
public function __construct($currentUser = null) {
if (self::$useSharedBd && self::$sharedBd != null && $currentUser === null) {
$this->bd = self::$sharedBd;
$this->prefix = self::$sharedPrefix;
return;
}
$db = Minz_Configuration::dataBase();
if ($currentUser === null) {
$currentUser = Minz_Session::param('currentUser', '_');
}
try {
$type = $db['type'];
if ($type === 'mysql') {
$string = 'mysql:host=' . $db['host']
. ';dbname=' . $db['base']
. ';charset=utf8';
$driver_options = array(
PDO::MYSQL_ATTR_INIT_COMMAND => 'SET NAMES utf8',
);
$this->prefix = $db['prefix'] . $currentUser . '_';
} elseif ($type === 'sqlite') {
$string = 'sqlite:' . DATA_PATH . '/' . $currentUser . '.sqlite';
$driver_options = array(
//PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
);
$this->prefix = '';
} else {
throw new Minz_PDOConnectionException(
'Invalid database type!',
$db['user'], Minz_Exception::ERROR
);
}
self::$sharedDbType = $type;
self::$sharedPrefix = $this->prefix;
$this->bd = new MinzPDO(
$string,
$db['user'],
$db['password'],
$driver_options
);
if ($type === 'sqlite') {
$this->bd->exec('PRAGMA foreign_keys = ON;');
}
self::$sharedBd = $this->bd;
} catch (Exception $e) {
throw new Minz_PDOConnectionException(
$string,
$db['user'], Minz_Exception::ERROR
);
}
}
public function beginTransaction() {
$this->bd->beginTransaction();
}
public function commit() {
$this->bd->commit();
}
public function rollBack() {
$this->bd->rollBack();
}
public static function clean() {
self::$sharedBd = null;
self::$sharedPrefix = '';
}
}
class MinzPDO extends PDO {
private static function check($statement) {
if (preg_match('/^(?:UPDATE|INSERT|DELETE)/i', $statement)) {
invalidateHttpCache();
}
}
public function prepare($statement, $driver_options = array()) {
MinzPDO::check($statement);
return parent::prepare($statement, $driver_options);
}
public function exec($statement) {
MinzPDO::check($statement);
return parent::exec($statement);
}
}
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