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<?php
declare(strict_types=1);
/**
* 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.
*/
public static bool $usesSharedPdo = true;
private static ?Minz_Pdo $sharedPdo = null;
private static ?string $sharedCurrentUser;
protected Minz_Pdo $pdo;
protected ?string $current_user;
/**
* @throws Minz_ConfigurationNamespaceException
* @throws Minz_PDOConnectionException
* @throws PDOException
*/
private function dbConnect(): void {
$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:' . DATA_PATH . '/users/' . $this->current_user . '/db.sqlite';
$this->pdo = new Minz_PdoSqlite($dsn . $dsnParams, null, null, $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(?string $currentUser = null, ?Minz_Pdo $currentPdo = null) {
if ($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 === null ? '' : $ex->getMessage(),
$db['user'], Minz_Exception::ERROR
);
}
public function beginTransaction(): void {
$this->pdo->beginTransaction();
}
public function inTransaction(): bool {
return $this->pdo->inTransaction();
}
public function commit(): void {
$this->pdo->commit();
}
public function rollBack(): void {
$this->pdo->rollBack();
}
public static function clean(): void {
self::$sharedPdo = null;
self::$sharedCurrentUser = '';
}
/**
* @param array<string,int|string|null> $values
* @phpstan-return ($mode is PDO::FETCH_ASSOC ? array<array<string,int|string|null>>|null : array<int|string|null>|null)
* @return array<array<string,int|string|null>>|array<int|string|null>|null
*/
private function fetchAny(string $sql, array $values, int $mode, int $column = 0): ?array {
$stm = $this->pdo->prepare($sql);
$ok = $stm !== false;
if ($ok && !empty($values)) {
foreach ($values as $name => $value) {
if (is_int($value)) {
$type = PDO::PARAM_INT;
} elseif (is_string($value)) {
$type = PDO::PARAM_STR;
} elseif (is_null($value)) {
$type = PDO::PARAM_NULL;
} else {
$ok = false;
break;
}
if (!$stm->bindValue($name, $value, $type)) {
$ok = false;
break;
}
}
}
if ($ok && $stm !== false && $stm->execute()) {
switch ($mode) {
case PDO::FETCH_COLUMN:
$res = $stm->fetchAll(PDO::FETCH_COLUMN, $column);
break;
case PDO::FETCH_ASSOC:
default:
$res = $stm->fetchAll(PDO::FETCH_ASSOC);
break;
}
if ($res !== false) {
return $res;
}
}
$backtrace = debug_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS, 6);
$calling = '';
for ($i = 2; $i < 6; $i++) {
if (empty($backtrace[$i]['function'])) {
break;
}
$calling .= '|' . $backtrace[$i]['function'];
}
$calling = trim($calling, '|');
$info = $stm == null ? $this->pdo->errorInfo() : $stm->errorInfo();
Minz_Log::error('SQL error ' . $calling . ' ' . json_encode($info));
return null;
}
/**
* @param array<string,int|string|null> $values
* @return array<array<string,int|string|null>>|null
*/
public function fetchAssoc(string $sql, array $values = []): ?array {
return $this->fetchAny($sql, $values, PDO::FETCH_ASSOC);
}
/**
* @param array<string,int|string|null> $values
* @return array<int|string|null>|null
*/
public function fetchColumn(string $sql, int $column, array $values = []): ?array {
return $this->fetchAny($sql, $values, PDO::FETCH_COLUMN, $column);
}
}
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