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<?php |
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/** |
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* Alxarafe. Development of PHP applications in a flash! |
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* Copyright (C) 2023 Alxarafe <[email protected]> |
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*/ |
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namespace Alxarafe\Database; |
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use Alxarafe\Core\Singletons\Config; |
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use Alxarafe\Core\Singletons\Debug; |
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use DebugBar\DataCollector\PDO\PDOCollector; |
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use DebugBar\DataCollector\PDO\TraceablePDO; |
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use PDO; |
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use PDOException; |
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use PDOStatement; |
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/** |
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* Class Engine |
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* |
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* Proporciona soporte genérico a bases de datos usando PDO. |
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* Cada motor que desee desarrollarse extenderá esta clase y añadirá sus particularidades. |
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* Se usa desde la clase estática DB. |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @package Alxarafe\Database |
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*/ |
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abstract class Engine |
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{ |
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/** |
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* Ruta en la que se encuentran los motores de la base de datos |
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*/ |
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const ENGINES_FOLDER = BASE_DIR . '/src/Database/Engines'; |
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/** |
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* Data Source Name |
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* |
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* @var string |
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*/ |
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protected static string $dsn; |
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/** |
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* Array con los parámetros de acceso a la base de datos |
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* |
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* @var array |
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*/ |
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protected static array $dbConfig; |
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/** |
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* Instancia PDO |
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* |
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* @var PDO |
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*/ |
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protected static PDO $dbHandler; |
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/** |
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* Instancia PDOStatement |
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* |
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* @var PDOStatement|false |
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*/ |
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protected static $statement; |
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/** |
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* Indica si la base de datos soporta SAVEPOINT en las transacciones. |
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* Si la base de datos no lo usa, el descendiente deberá de ponerlo a "false". |
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* SAVEPOINT es una forma de anidar transacciones. |
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* |
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* @source https://coderwall.com/p/rml5fa/nested-pdo-transactions |
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* |
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* @var bool |
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*/ |
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protected static bool $savePointsSupport = true; |
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/** |
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* Indica el número de transacciones que están siendo ejecutadas. |
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* |
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* @var int |
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*/ |
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protected static int $transactionDepth = 0; |
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/** |
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* Engine constructor |
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* |
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* @param array $dbConfig |
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*/ |
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public function __construct(array $dbConfig) |
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{ |
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self::$dbConfig = $dbConfig; |
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} |
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/** |
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* Engine destructor. Cancela las transacciones pendientes. |
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*/ |
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public function ___destruct() |
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{ |
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$this->rollbackTransactions(); |
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} |
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/** |
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* Obtiene un array con los motores de base de datos disponibles. |
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* |
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* TODO: La extracción de archivos de una ruta por su extensión se usa en más |
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* de una ocasión. Habría que plantearse un método estático que lo facilite. |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @return array |
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*/ |
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public static function _getEngines(): array |
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{ |
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$engines = scandir(self::ENGINES_FOLDER); |
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$ret = []; |
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foreach ($engines as $engine) { |
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if ($engine != '.' && $engine != '..' && substr($engine, -4) == '.php') { |
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$ret[] = substr($engine, 0, strlen($engine) - 4); |
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} |
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} |
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return $ret; |
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} |
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/** |
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* Retorna el nombre físico de la tabla. Estará en minúsculas y contendrá el prefijo de |
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* la base de datos. |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @param $tablename |
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* |
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* @return string |
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*/ |
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public static function getTableName($tableName): string |
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{ |
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return DB::$dbPrefix . strtolower($tableName); |
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} |
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/** |
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* Cancela las transacciones pendientes. |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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*/ |
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final public static function _rollbackTransactions() |
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{ |
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while (self::$transactionDepth > 0) { |
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self::rollback(); |
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} |
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} |
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/** |
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* Cancela la transacción en curso |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @return bool |
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*/ |
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final public static function _rollBack(): bool |
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{ |
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$ret = true; |
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if (self::$transactionDepth == 0) { |
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throw new PDOException('Rollback error : There is no transaction started'); |
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} |
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Debug::sqlMessage('Rollback, savepoint LEVEL' . self::$transactionDepth); |
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self::$transactionDepth--; |
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if (self::$transactionDepth == 0 || !self::$savePointsSupport) { |
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$ret = self::$dbHandler->rollBack(); |
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} else { |
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self::exec('ROLLBACK TO SAVEPOINT LEVEL' . self::$transactionDepth); |
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} |
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return $ret; |
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} |
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/** |
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* Ejecuta una sentencia SQL (INSERT, UPDATE o DELETE). |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @param string $query |
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* |
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* @return bool |
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*/ |
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final public static function exec(string $query): bool |
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{ |
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self::$statement = self::$dbHandler->prepare($query); |
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if (self::$statement != null && self::$statement) { |
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return self::$statement->execute([]); |
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} |
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return false; |
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} |
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/** |
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* Retorna el ID del último registro insertado. Vacío si no ha habido inserción. |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @return string |
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*/ |
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final public static function _getLastInserted(): string |
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{ |
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$data = self::select('SELECT @@identity AS id'); |
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if (count($data) > 0) { |
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return $data[0]['id']; |
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} |
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return ''; |
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} |
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/** |
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* Ejecuta el comando SELECT de SQL retornando la respuesta en un array. |
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* Si no hay datos, retorna un array vacío. |
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* En caso de error, retorna "false". |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @param string $query |
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* |
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* @return array|false |
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*/ |
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public static function select(string $query) |
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{ |
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self::$statement = self::$dbHandler->prepare($query); |
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if (self::$statement != null && self::$statement && self::$statement->execute([])) { |
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return self::$statement->fetchAll(PDO::FETCH_ASSOC); |
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} |
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return []; |
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} |
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/** |
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* Comprueba si hay una conexión activa a la base de datos. |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @return bool |
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*/ |
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public static function checkConnection(): bool |
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{ |
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return (self::$dbHandler != null); |
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} |
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/** |
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* Establece conexión con la base de datos. |
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* Si ya existía una conexión, simplemente retorna éxito. |
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* Retorna true si existe conexión, asignando el handler a self::$dbHandler. |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* |
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* @param array $config |
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* |
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* @return bool |
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*/ |
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public static function connect(array $config = []): bool |
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{ |
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if (isset(self::$dbHandler)) { |
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Debug::sqlMessage("PDO: Already connected " . self::$dsn); |
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return true; |
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} |
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Debug::sqlMessage("PDO: " . self::$dsn); |
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try { |
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// Logs SQL queries. You need to wrap your PDO object into a DebugBar\DataCollector\PDO\TraceablePDO object. |
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// http://phpdebugbar.com/docs/base-collectors.html |
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self::$dbHandler = new TraceablePDO(new PDO(self::$dsn, self::$dbConfig['dbUser'], self::$dbConfig['dbPass'], $config)); |
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Debug::addCollector(new PDOCollector(self::$dbHandler)); |
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} catch (PDOException $e) { |
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Debug::addException($e); |
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return false; |
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} |
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return isset(self::$dbHandler); |
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} |
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/** |
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* Prepara una sentencia para su ejecución y la retorna. |
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* |
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* @source https://php.net/manual/en/pdo.prepare.php |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @param string $sql |
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* @param array $options |
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* |
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* @return bool |
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*/ |
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final public static function _prepare(string $sql, array $options = []): bool |
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{ |
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if (!isset(self::$dbHandler)) { |
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return false; |
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} |
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self::$statement = self::$dbHandler->prepare($sql, $options); |
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return (self::$statement != false); |
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} |
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/** |
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* Ejecuta una sentencia SQL previamente preparada. |
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* |
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* @source https://php.net/manual/en/pdostatement.execute.php |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @param array $inputParameters |
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* |
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* @return bool |
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*/ |
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final public static function _execute(array $inputParameters = []): bool |
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{ |
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if (!isset(self::$statement) || !self::$statement) { |
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return false; |
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} |
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return self::$statement->execute($inputParameters); |
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} |
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/** |
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* Inicia una transacción |
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* |
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* @source https://www.ibm.com/support/knowledgecenter/es/SSEPGG_9.1.0/com.ibm.db2.udb.apdv.php.doc/doc/t0023166.htm |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @return bool |
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*/ |
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final public static function _beginTransaction(): bool |
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{ |
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if (self::$transactionDepth == 0 || !self::$savePointsSupport) { |
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$ret = self::$dbHandler->beginTransaction(); |
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} else { |
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$ret = self::exec('SAVEPOINT LEVEL' . self::$transactionDepth); |
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} |
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if (!$ret) { |
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return false; |
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} |
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self::$transactionDepth++; |
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Debug::sqlMessage('Transaction started, savepoint LEVEL' . self::$transactionDepth . ' saved'); |
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return true; |
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} |
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/** |
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* Confirma la transacción en curso |
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* |
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* @author Rafael San José Tovar <[email protected]> |
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* @version 2023.0108 |
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* |
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* @return bool |
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*/ |
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final public static function _commit(): bool |
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{ |
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$ret = true; |
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Debug::sqlMessage('Commit, savepoint LEVEL' . self::$transactionDepth); |
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self::$transactionDepth--; |
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if (self::$transactionDepth == 0 || !self::$savePointsSupport) { |
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$ret = self::$dbHandler->commit(); |
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} else { |
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self::exec('RELEASE SAVEPOINT LEVEL' . self::$transactionDepth); |
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} |
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return $ret; |
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} |
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} |
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This check looks for calls to methods that do not seem to exist on a given type. It looks for the method on the type itself as well as in inherited classes or implemented interfaces.
This is most likely a typographical error or the method has been renamed.