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<?php
/**
* This file is part of the Nette Framework (https://nette.org)
* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
*/
declare(strict_types=1);
namespace Nette\Database;
use Nette;
use PDO;
use PDOException;
/**
* Represents a connection between PHP and a database server.
*/
class Connection
{
use Nette\SmartObject;
/** @var callable[]&(callable(Connection $connection): void)[]; Occurs after connection is established */
public $onConnect;
/** @var callable[]&(callable(Connection $connection, ResultSet|DriverException $result): void)[]; Occurs after query is executed */
public $onQuery;
/** @var array */
private $params;
/** @var array */
private $options;
/** @var ISupplementalDriver */
private $driver;
/** @var SqlPreprocessor */
private $preprocessor;
/** @var PDO|null */
private $pdo;
/** @var string|null */
private $sql;
public function __construct(string $dsn, string $user = null, string $password = null, array $options = null)
{
$this->params = [$dsn, $user, $password];
$this->options = (array) $options;
if (empty($options['lazy'])) {
$this->connect();
}
}
public function connect(): void
{
if ($this->pdo) {
return;
}
try {
$this->pdo = new PDO($this->params[0], $this->params[1], $this->params[2], $this->options);
$this->pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
} catch (PDOException $e) {
throw ConnectionException::from($e);
}
$class = empty($this->options['driverClass'])
? 'Nette\Database\Drivers\\' . ucfirst(str_replace('sql', 'Sql', $this->pdo->getAttribute(PDO::ATTR_DRIVER_NAME))) . 'Driver'
: $this->options['driverClass'];
$this->driver = new $class;
$this->preprocessor = new SqlPreprocessor($this);
$this->driver->initialize($this, $this->options);
$this->onConnect($this);
}
public function reconnect(): void
{
$this->disconnect();
$this->connect();
}
public function disconnect(): void
{
$this->pdo = null;
}
public function getDsn(): string
{
return $this->params[0];
}
public function getPdo(): PDO
{
$this->connect();
return $this->pdo;
}
public function getSupplementalDriver(): ISupplementalDriver
{
$this->connect();
return $this->driver;
}
public function getInsertId(string $sequence = null): string
{
try {
$res = $this->getPdo()->lastInsertId($sequence);
return $res === false ? '0' : $res;
} catch (PDOException $e) {
throw $this->driver->convertException($e);
}
}
public function quote(string $string, int $type = PDO::PARAM_STR): string
{
try {
return $this->getPdo()->quote($string, $type);
} catch (PDOException $e) {
throw DriverException::from($e);
}
}
public function beginTransaction(): void
{
$this->query('::beginTransaction');
}
public function commit(): void
{
$this->query('::commit');
}
public function rollBack(): void
{
$this->query('::rollBack');
}
/**
* Generates and executes SQL query.
*/
public function query(string $sql, ...$params): ResultSet
{
[$this->sql, $params] = $this->preprocess($sql, ...$params);
try {
$result = new ResultSet($this, $this->sql, $params);
} catch (PDOException $e) {
$this->onQuery($this, $e);
throw $e;
}
$this->onQuery($this, $result);
return $result;
}
public function queryArgs(string $sql, array $params): ResultSet
{
return $this->query($sql, ...$params);
}
/**
* @return array [string, array]
*/
public function preprocess(string $sql, ...$params): array
{
$this->connect();
return $params
? $this->preprocessor->process(func_get_args())
: [$sql, []];
}
public function getLastQueryString(): ?string
{
return $this->sql;
}
/********************* shortcuts ****************d*g**/
/**
* Shortcut for query()->fetch()
*/
public function fetch(string $sql, ...$params): ?IRow
{
return $this->query($sql, ...$params)->fetch();
}
/**
* Shortcut for query()->fetchField()
* @return mixed
*/
public function fetchField(string $sql, ...$params)
{
return $this->query($sql, ...$params)->fetchField();
}
/**
* Shortcut for query()->fetchFields()
*/
public function fetchFields(string $sql, ...$params): ?array
{
return $this->query($sql, ...$params)->fetchFields();
}
/**
* Shortcut for query()->fetchPairs()
*/
public function fetchPairs(string $sql, ...$params): array
{
return $this->query($sql, ...$params)->fetchPairs();
}
/**
* Shortcut for query()->fetchAll()
*/
public function fetchAll(string $sql, ...$params): array
{
return $this->query($sql, ...$params)->fetchAll();
}
public static function literal(string $value, ...$params): SqlLiteral
{
return new SqlLiteral($value, $params);
}
}
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