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<?php |
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namespace Nayjest\Querying; |
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use ArrayIterator; |
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use Exception; |
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use IteratorAggregate; |
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use Nayjest\Querying\Handler\AbstractFactory; |
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use Nayjest\Querying\Handler\HandlerInterface; |
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use Nayjest\Querying\Operation\HydrateOperation; |
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use Nayjest\Querying\Operation\OperationInterface; |
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use Nayjest\Querying\Row\DynamicFieldsRegistry; |
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use Nayjest\Querying\Row\RowInterface; |
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abstract class AbstractQuery implements IteratorAggregate |
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{ |
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private $dataSource; |
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/** |
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* @var OperationInterface[] |
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*/ |
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private $operations; |
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private $dynamicFields; |
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/** |
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* @return AbstractFactory |
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*/ |
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abstract protected function getHandlerFactory(); |
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/** |
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* AbstractQuery constructor. |
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* @param $dataSource |
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* @param string $rowClass |
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*/ |
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public function __construct($dataSource, $rowClass) |
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{ |
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$this->dataSource = $dataSource; |
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$this->dynamicFields = new DynamicFieldsRegistry(); |
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$this->operations = [new HydrateOperation($rowClass, $this->dynamicFields)]; |
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$this->initialize(); |
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} |
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public function getIterator() |
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{ |
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$data = $this->get(); |
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if (is_array($data)) { |
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return new ArrayIterator($data); |
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} else { |
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return $data; |
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} |
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} |
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protected function initialize() |
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{ |
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} |
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protected function execute($data) |
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{ |
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foreach ($this->getHandlers() as $handler) { |
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$data = $handler->apply($data); |
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} |
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return $data; |
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} |
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/** |
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* @return HandlerInterface[] |
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*/ |
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protected function getHandlers() |
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{ |
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$handlers = []; |
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$factory = $this->getHandlerFactory(); |
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foreach ($this->operations as $operation) { |
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$handlers[] = $factory->makeHandler($operation); |
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} |
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usort($handlers, function (HandlerInterface $a, HandlerInterface $b) { |
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$aPos = $a->getPriority(); |
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$bPos = $b->getPriority(); |
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if ($aPos == $bPos) { |
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return 0; |
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} |
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return ($aPos < $bPos) ? -1 : 1; |
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}); |
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return $handlers; |
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} |
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/** |
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* @return RowInterface[]|\Traversable |
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*/ |
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public function get() |
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{ |
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return $this->execute($this->dataSource); |
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} |
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/** |
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* @return RowInterface[] |
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*/ |
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public function getArray() |
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{ |
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$data = $this->get(); |
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return is_array($data) ? $data : iterator_to_array($data); |
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} |
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/** |
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* @return array |
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*/ |
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public function getRaw() |
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{ |
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$data = $this->get(); |
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$res = []; |
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foreach ($data as $row) { |
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$res[] = $row->getSrc(); |
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} |
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return $res; |
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} |
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/** |
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* @param OperationInterface $operation |
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* @return $this |
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*/ |
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public function addOperation(OperationInterface $operation) |
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{ |
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$this->operations[] = $operation; |
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return $this; |
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} |
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public function addOperations(array $operations) |
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{ |
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foreach ($operations as $operation) { |
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$this->addOperation($operation); |
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} |
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return $this; |
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} |
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public function hasOperation(OperationInterface $operation) |
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{ |
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return in_array($operation, $this->operations); |
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} |
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public function removeOperation(OperationInterface $operation) |
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{ |
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if ($this->hasOperation($operation)) { |
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$key = array_search($operation, $this->operations); |
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unset($this->operations[$key]); |
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} else { |
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throw new Exception("Trying to remove unexisting operation from query"); |
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} |
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return $this; |
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} |
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public function getSrc() |
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{ |
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return $this->dataSource; |
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} |
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} |
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Nayjest /
Querying
