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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;
private static $sharedCurrentUser;
protected static $sharedDbType;
/**
* $bd variable représentant la base de données
*/
protected $bd;
protected $current_user;
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($currentUser = null) {
if ($currentUser === null) {
$currentUser = Minz_Session::param('currentUser');
}
if (self::$useSharedBd && self::$sharedBd != null &&
($currentUser == null || $currentUser === self::$sharedCurrentUser)) {
$this->bd = self::$sharedBd;
$this->prefix = self::$sharedPrefix;
$this->current_user = self::$sharedCurrentUser;
return;
}
$this->current_user = $currentUser;
self::$sharedCurrentUser = $currentUser;
$conf = Minz_Configuration::get('system');
$db = $conf->db;
$driver_options = isset($conf->db['pdo_options']) && is_array($conf->db['pdo_options']) ? $conf->db['pdo_options'] : array();
$dbServer = parse_url('db://' . $db['host']);
try {
switch ($db['type']) {
case 'mysql':
$string = 'mysql:host=' . $dbServer['host'] . ';dbname=' . $db['base'] . ';charset=utf8mb4';
if (!empty($dbServer['port'])) {
$string .= ';port=' . $dbServer['port'];
}
$driver_options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES utf8mb4';
$this->prefix = $db['prefix'] . $currentUser . '_';
$this->bd = new MinzPDOMySql($string, $db['user'], $db['password'], $driver_options);
break;
case 'sqlite':
$string = 'sqlite:' . join_path(DATA_PATH, 'users', $currentUser, 'db.sqlite');
$this->prefix = '';
$this->bd = new MinzPDOMSQLite($string, $db['user'], $db['password'], $driver_options);
$this->bd->exec('PRAGMA foreign_keys = ON;');
break;
case 'pgsql':
$string = 'pgsql:host=' . $dbServer['host'] . ';dbname=' . $db['base'];
if (!empty($dbServer['port'])) {
$string .= ';port=' . $dbServer['port'];
}
$this->prefix = $db['prefix'] . $currentUser . '_';
$this->bd = new MinzPDOPGSQL($string, $db['user'], $db['password'], $driver_options);
$this->bd->exec("SET NAMES 'UTF8';");
break;
default:
throw new Minz_PDOConnectionException(
'Invalid database type!',
$db['user'], Minz_Exception::ERROR
);
break;
}
self::$sharedBd = $this->bd;
self::$sharedDbType = $db['type'];
self::$sharedPrefix = $this->prefix;
} catch (Exception $e) {
throw new Minz_PDOConnectionException(
$string,
$db['user'], Minz_Exception::ERROR
);
}
}
public function beginTransaction() {
$this->bd->beginTransaction();
}
public function inTransaction() {
return $this->bd->inTransaction(); //requires PHP >= 5.3.3
}
public function commit() {
$this->bd->commit();
}
public function rollBack() {
$this->bd->rollBack();
}
public static function clean() {
self::$sharedBd = null;
self::$sharedPrefix = '';
}
public function disableBuffering() {
if ((self::$sharedDbType === 'mysql') && defined('PDO::MYSQL_ATTR_USE_BUFFERED_QUERY')) {
$this->bd->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, false);
}
}
}
class MinzPDO extends PDO {
private static function check($statement) {
if (preg_match('/^(?:UPDATE|INSERT|DELETE)/i', $statement)) {
invalidateHttpCache();
}
}
protected function compatibility($statement) {
return $statement;
}
public function prepare($statement, $driver_options = array()) {
MinzPDO::check($statement);
$statement = $this->compatibility($statement);
return parent::prepare($statement, $driver_options);
}
public function exec($statement) {
MinzPDO::check($statement);
$statement = $this->compatibility($statement);
return parent::exec($statement);
}
public function query($statement) {
MinzPDO::check($statement);
$statement = $this->compatibility($statement);
return parent::query($statement);
}
}
class MinzPDOMySql extends MinzPDO {
public function lastInsertId($name = null) {
return parent::lastInsertId(); //We discard the name, only used by PostgreSQL
}
}
class MinzPDOMSQLite extends MinzPDO {
public function lastInsertId($name = null) {
return parent::lastInsertId(); //We discard the name, only used by PostgreSQL
}
}
class MinzPDOPGSQL extends MinzPDO {
protected function compatibility($statement) {
return str_replace(array('`', ' LIKE '), array('"', ' ILIKE '), $statement);
}
}
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