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Connection.php
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<?php
/**
* Qubus\Dbal
*
* @link https://github.com/QubusPHP/dbal
* @copyright 2020
* @author Joshua Parker <joshua@joshuaparker.dev>
* @license https://opensource.org/licenses/mit-license.php MIT License
*/
declare(strict_types=1);
namespace Qubus\Dbal;
use BadMethodCallException;
use Closure;
use PDOException;
use Qubus\Exception\Exception;
use function array_map;
use function array_merge;
use function call_user_func_array;
use function class_exists;
use function end;
use function is_callable;
use function is_object;
use function method_exists;
use function Qubus\Support\Helpers\is_null__;
use function strtolower;
use function ucfirst;
abstract class Connection
{
public const DEFAULT_PARAMETERS = [
'type' => 'pdo',
'driver' => 'mysql',
'profiling' => false,
'asObject' => true,
'propertiesLate' => false,
'charset' => 'utf8',
'host' => 'localhost',
'dbname' => null,
'port' => 3306,
'username' => null,
'password' => null,
'persistent' => false,
'fetchmode' => 'object',
'prepare' => false,
];
/** @var array collection of executed queries */
protected array $queries = [];
/** @var array profiler callbacks */
protected array $profilerCallbacks = [
'start' => null,
'end' => null,
];
/** @var array $config connection config */
protected array $config;
/**
* Returns a connection instance based on the config.
*
* @param array $config Connection config
* @throws Exception
*/
public static function instance(array $config = []): Connection
{
$config = array_merge(self::DEFAULT_PARAMETERS, $config);
$class = ucfirst(strtolower($config['type']));
$config['driver'] && $class .= '\\' . ucfirst(strtolower($config['driver']));
if (! class_exists($class = __NAMESPACE__ . '\\Connection\\' . $class)) {
throw new Exception('Cannot load database connection: ' . $class);
}
return new $class($config);
}
/**
* Constructor, sets the main config array.
*/
public function __construct(array $config = [])
{
if (isset($config['username'])) {
unset($config['username']);
}
if (isset($config['password'])) {
unset($config['password']);
}
$this->config = $config;
}
public function tablePrefix(): string
{
return $this->config['prefix'];
}
/**
* Enables the profiling.
*/
public function enableProfiler(): static
{
$this->config['profiling'] = true;
return $this;
}
/**
* Enables the profiling, will clear out past queries on next execution.
*/
public function disableProfiling(): static
{
$this->config['profiling'] = false;
return $this;
}
/**
* Returns the last executed query.
*
* @return mixed last executed query
*/
public function lastQuery(): mixed
{
return $last = end($this->queries) ? $last['query'] : null;
}
/**
* Returns an array of fired queries.
*
* @return array fired queries
*/
public function queries(): array
{
return array_map(function ($i) {
return $i['query'];
}, $this->queries);
}
/**
* Returns the fired queries with profiling data.
*
* @return array profiler data about the queries
*/
public function profilerQueries(): array
{
return $this->queries;
}
/**
* Returns the fired queries with profiling data.
*/
public function profilerCallbacks(mixed $start = null, mixed $end = null): void
{
$this->profilerCallbacks['start'] = $start;
$this->profilerCallbacks['end'] = $end;
}
/**
* Run transactional queries.
*
* @param Closure $callback transaction callback
* @throws Exception
*/
public function transaction(Closure $callback, mixed $that = null, mixed $default = null)
{
if (is_null__($that)) {
$that = $this;
}
// check if we are in a transaction
if ($this->inTransaction()) {
return $callback($that);
}
$result = $default;
try {
// start the transaction
$this->startTransaction();
// execute the callback
$result = $callback($this);
// all fine, commit the transaction
$this->commitTransaction();
} catch (PDOException $e) { // catch any errors generated in the callback
// rollback on error
$this->rollbackTransaction();
throw new DbalException(message: $e->getMessage(), code: (int) $e->getCode());
}
return $result;
}
/**
* Transaction functions.
*
* @throws Exception
*/
public function inTransaction()
{
throw new Exception('Transactions are not supported by this driver.');
}
/**
* @throws Exception
*/
public function startTransaction()
{
throw new Exception('Transactions are not supported by this driver.');
}
/**
* @throws Exception
*/
public function commitTransaction()
{
throw new Exception('Transactions are not supported by this driver.');
}
/**
* @throws Exception
*/
public function rollbackTransaction()
{
throw new Exception('Transactions are not supported by this driver.');
}
/**
* Savepoints functions.
*
* @throws Exception
*/
public function setSavepoint(mixed $savepoint = null)
{
throw new Exception('Savepoints are not supported by this driver.');
}
/**
* @throws Exception
*/
public function rollbackSavepoint(mixed $savepoint = null)
{
throw new Exception('Savepoints are not supported by this driver.');
}
/**
* @throws Exception
*/
public function releaseSavepoint(mixed $savepoint = null)
{
throw new Exception('Savepoints are not supported by this driver.');
}
/**
* DB class call forwarding. Sets the current connection if setter is available.
*
* @param string $func function name
* @param array $args function arguments
* @throws BadMethodCallException When method doesn't exist.
*/
public function __call(string $func, array $args)
{
$call = '\\Qubus\\Dbal\\DB::' . $func;
if (is_callable($call)) {
$return = call_user_func_array($call, $args);
if (is_object($return) && method_exists($return, 'setConnection')) {
$return->setConnection($this);
}
return $return;
}
throw new BadMethodCallException($func . ' is not a method of ' . static::class);
}
/**
* List databases.
*
* @throws Exception
*/
public function listDatabases()
{
throw new Exception('List database is not supported by this driver.');
}
/**
* List database tables.
*
* @throws Exception
*/
public function listTables()
{
throw new Exception('List tables is not supported by this driver.');
}
/**
* List table fields.
*
* @throws Exception
*/
public function listFields(mixed $table)
{
throw new Exception('List fields is not supported by this driver.');
}
abstract public function quoteIdentifier(mixed $value): mixed;
}