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<?php
/**
* MINZ - Copyright 2011 Marien Fressinaud
* Sous licence AGPL3 <http://www.gnu.org/licenses/>
*/
/**
* The Model_sql class represents the model for interacting with databases.
*/
class Minz_ModelPdo {
/**
* Shares the connection to the database between all instances.
* @var bool
*/
public static $usesSharedPdo = true;
/**
* @var Minz_Pdo|null
*/
private static $sharedPdo;
/**
* @var string|null
*/
private static $sharedCurrentUser;
/**
* @var Minz_Pdo
*/
protected $pdo;
/**
* @var string|null
*/
protected $current_user;
/**
* @return void
* @throws Minz_ConfigurationNamespaceException
* @throws Minz_PDOConnectionException
* @throws PDOException
*/
private function dbConnect() {
$db = Minz_Configuration::get('system')->db;
$driver_options = isset($db['pdo_options']) && is_array($db['pdo_options']) ? $db['pdo_options'] : [];
$driver_options[PDO::ATTR_ERRMODE] = PDO::ERRMODE_SILENT;
$dbServer = parse_url('db://' . $db['host']);
$dsn = '';
$dsnParams = empty($db['connection_uri_params']) ? '' : (';' . $db['connection_uri_params']);
switch ($db['type']) {
case 'mysql':
$dsn = 'mysql:';
if (empty($dbServer['host'])) {
$dsn .= 'unix_socket=' . $db['host'];
} else {
$dsn .= 'host=' . $dbServer['host'];
}
$dsn .= ';charset=utf8mb4';
if (!empty($db['base'])) {
$dsn .= ';dbname=' . $db['base'];
}
if (!empty($dbServer['port'])) {
$dsn .= ';port=' . $dbServer['port'];
}
$driver_options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES utf8mb4';
$this->pdo = new Minz_PdoMysql($dsn . $dsnParams, $db['user'], $db['password'], $driver_options);
$this->pdo->setPrefix($db['prefix'] . $this->current_user . '_');
break;
case 'sqlite':
$dsn = 'sqlite:' . join_path(DATA_PATH, 'users', $this->current_user, 'db.sqlite');
$this->pdo = new Minz_PdoSqlite($dsn . $dsnParams, $db['user'], $db['password'], $driver_options);
$this->pdo->setPrefix('');
break;
case 'pgsql':
$dsn = 'pgsql:host=' . (empty($dbServer['host']) ? $db['host'] : $dbServer['host']);
if (!empty($db['base'])) {
$dsn .= ';dbname=' . $db['base'];
}
if (!empty($dbServer['port'])) {
$dsn .= ';port=' . $dbServer['port'];
}
$this->pdo = new Minz_PdoPgsql($dsn . $dsnParams, $db['user'], $db['password'], $driver_options);
$this->pdo->setPrefix($db['prefix'] . $this->current_user . '_');
break;
default:
throw new Minz_PDOConnectionException(
'Invalid database type!',
$db['user'], Minz_Exception::ERROR
);
}
self::$sharedPdo = $this->pdo;
}
/**
* Create the connection to the database using the variables
* HOST, BASE, USER and PASS variables defined in the configuration file
* @param string|null $currentUser
* @param Minz_Pdo|null $currentPdo
* @throws Minz_ConfigurationNamespaceException
* @throws Minz_PDOConnectionException
*/
public function __construct($currentUser = null, $currentPdo = null) {
if ($currentUser === null) {
$currentUser = Minz_User::name();
}
if ($currentPdo !== null) {
$this->pdo = $currentPdo;
return;
}
if ($currentUser == '') {
throw new Minz_PDOConnectionException('Current user must not be empty!', '', Minz_Exception::ERROR);
}
if (self::$usesSharedPdo && self::$sharedPdo !== null && $currentUser === self::$sharedCurrentUser) {
$this->pdo = self::$sharedPdo;
$this->current_user = self::$sharedCurrentUser;
return;
}
$this->current_user = $currentUser;
self::$sharedCurrentUser = $currentUser;
$ex = null;
//Attempt a few times to connect to database
for ($attempt = 1; $attempt <= 5; $attempt++) {
try {
$this->dbConnect();
return;
} catch (PDOException $e) {
$ex = $e;
if (empty($e->errorInfo[0]) || $e->errorInfo[0] !== '08006') {
//We are only interested in: SQLSTATE connection exception / connection failure
break;
}
} catch (Exception $e) {
$ex = $e;
}
sleep(2);
}
$db = Minz_Configuration::get('system')->db;
throw new Minz_PDOConnectionException(
$ex->getMessage(),
$db['user'], Minz_Exception::ERROR
);
}
/**
* @return void
*/
public function beginTransaction() {
$this->pdo->beginTransaction();
}
public function inTransaction(): bool {
return $this->pdo->inTransaction();
}
/**
* @return void
*/
public function commit() {
$this->pdo->commit();
}
/**
* @return void
*/
public function rollBack() {
$this->pdo->rollBack();
}
/**
* @return void
*/
public static function clean() {
self::$sharedPdo = null;
self::$sharedCurrentUser = '';
}
}
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