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<?php |
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/** |
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* @author Rémy M. Böhler <[email protected]> |
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*/ |
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declare(strict_types=1); |
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namespace Rorm; |
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class Query |
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{ |
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/** @var \PDO */ |
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private $connection; |
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/** @var string */ |
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private $class; |
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/** @var string */ |
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private $query; |
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/** @var array */ |
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private $params; |
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/** @var \PDOStatement */ |
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private $statement; |
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/** @var ModelBuilder */ |
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private $modelBuilder; |
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public function __construct(\PDO $connection, ModelBuilder $modelBuilder, string $class = \stdClass::class) |
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{ |
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$this->connection = $connection; |
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$this->class = $class; |
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$this->modelBuilder = $modelBuilder; |
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} |
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public function getClass(): string |
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{ |
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return $this->class; |
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} |
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public function getConnection(): \PDO |
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{ |
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return $this->connection; |
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} |
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public function setQuery(string $query): void |
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{ |
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$this->query = $query; |
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} |
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public function getQuery(): ?string |
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{ |
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return $this->query; |
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} |
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public function setParams(array $params): void |
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{ |
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$this->params = $params; |
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} |
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public function getParams(): ?array |
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{ |
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return $this->params; |
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} |
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private function execute(): void |
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{ |
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$this->statement = $this->connection->prepare($this->query); |
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// set fetchMode to assoc, it is easier to copy data from an array than an object |
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$this->statement->setFetchMode(\PDO::FETCH_ASSOC); |
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if (!$this->statement->execute($this->params)) { |
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// in case of the error mode does not throw exceptions we create one |
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throw new \PDOException($this->statement->errorInfo(), $this->statement->errorCode()); |
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} |
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} |
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private function fetch() |
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{ |
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$data = $this->statement->fetch(); |
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if ($data !== false) { |
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return $this->instanceFromObject($data); |
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} |
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return null; |
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} |
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public function instanceFromObject(array $data) |
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{ |
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$instance = $this->modelBuilder->build($this->class); |
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if ($instance instanceof Model) { |
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$instance->setData($data); |
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} else { |
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foreach ($data as $key => $value) { |
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$instance->$key = $value; |
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} |
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} |
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return $instance; |
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} |
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public function findColumn() |
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{ |
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$this->execute(); |
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return $this->statement->fetchColumn(); |
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} |
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/** |
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* Return one object |
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*/ |
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public function findOne() |
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{ |
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// DO NOT use rowCount to check if something was found because not all drivers support it |
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$this->execute(); |
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return $this->fetch(); |
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} |
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/** |
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* Return a iterator to iterate over which returns one object at a time |
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* the objects are lazy loaded and not kept on memory |
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* |
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* because the results are not buffered you can only iterate once over it! |
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* If you need to iterate multiple times over the result you should use the findAll method |
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* |
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* Note for PHP 5.5 |
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* yield could be used |
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*/ |
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public function findMany(): \Generator |
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{ |
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$this->execute(); |
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while ($object = $this->statement->fetchObject()) { |
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yield $this->instanceFromObject($object); |
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} |
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} |
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/** |
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* Return an array with all objects, this can lead to heavy memory consumption |
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*/ |
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public function findAll(): array |
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{ |
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$result = []; |
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foreach ($this->findMany() as $object) { |
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$result[] = $object; |
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} |
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return $result; |
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} |
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/** |
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* This operation is very expensive. |
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* |
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* PDOStatement::rowCount does not work on all drivers! |
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*/ |
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public function count(): int |
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{ |
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return count($this->findAll()); |
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} |
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} |
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rrelmy /
rorm
