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<?php |
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/** |
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* This file is part of Hydrogen package. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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declare(strict_types=1); |
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namespace RDS\Hydrogen\Processor; |
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use Doctrine\Common\Persistence\ObjectRepository; |
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use Doctrine\ORM\EntityManagerInterface; |
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use Doctrine\ORM\EntityRepository; |
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use Doctrine\ORM\Mapping\ClassMetadata; |
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use RDS\Hydrogen\Criteria\CriterionInterface; |
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use RDS\Hydrogen\Query; |
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/** |
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* Class Processor |
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*/ |
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abstract class Processor implements ProcessorInterface |
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{ |
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/** |
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* @var string[]|BuilderInterface[] |
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*/ |
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protected const CRITERIA_MAPPINGS = []; |
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/** |
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* @var ObjectRepository|EntityRepository |
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*/ |
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protected $repository; |
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/** |
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* @var EntityManagerInterface |
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*/ |
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protected $em; |
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/** |
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* @var ClassMetadata |
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*/ |
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protected $meta; |
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/** |
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* DatabaseProcessor constructor. |
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* @param ObjectRepository $repository |
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* @param EntityManagerInterface $em |
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*/ |
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public function __construct(ObjectRepository $repository, EntityManagerInterface $em) |
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{ |
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$this->em = $em; |
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$this->meta = $em->getClassMetadata($repository->getClassName()); |
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$this->repository = $repository; |
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\assert(\count(static::CRITERIA_MAPPINGS)); |
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} |
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/** |
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* @return EntityManagerInterface |
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*/ |
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public function getEntityManager(): EntityManagerInterface |
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{ |
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return $this->em; |
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} |
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/** |
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* @return EntityRepository|ObjectRepository |
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*/ |
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public function getRepository(): ObjectRepository |
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{ |
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return $this->repository; |
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} |
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/** |
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* @return ClassMetadata |
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*/ |
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public function getMetadata(): ClassMetadata |
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{ |
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return $this->meta; |
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} |
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/** |
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* @param mixed $context |
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* @param Query $query |
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* @return \Generator |
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*/ |
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protected function bypass($context, Query $query): \Generator |
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{ |
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foreach ($this->builders($query) as $criterion => $builder) { |
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$result = $builder->apply($context, $criterion); |
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if (\is_iterable($result)) { |
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yield $criterion => $result; |
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} |
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} |
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} |
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/** |
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* @param \Generator $generator |
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* @return array |
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*/ |
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protected function await(\Generator $generator): array |
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{ |
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$queue = new Queue(); |
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while ($generator->valid()) { |
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$value = $generator->current(); |
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if ($value instanceof \Closure) { |
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$queue->push($value); |
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} |
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$generator->next(); |
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} |
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return [$queue, $generator->getReturn()]; |
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} |
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/** |
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* @param Query $query |
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* @return \Generator|BuilderInterface[] |
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*/ |
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private function builders(Query $query): \Generator |
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{ |
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$context = []; |
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foreach ($query->getCriteria() as $criterion) { |
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$key = \get_class($criterion); |
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yield $criterion => $context[$key] ?? $context[$key] = $this->getBuilder($query, $criterion); |
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} |
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unset($context); |
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} |
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/** |
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* @param Query $query |
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* @param CriterionInterface $criterion |
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* @return BuilderInterface |
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*/ |
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protected function getBuilder(Query $query, CriterionInterface $criterion): BuilderInterface |
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{ |
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$processor = static::CRITERIA_MAPPINGS[\get_class($criterion)] ?? null; |
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if ($processor === null) { |
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$error = \vsprintf('%s processor does not support the "%s" criterion', [ |
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\str_replace_last('Processor', '', \class_basename($this)), |
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\class_basename($criterion), |
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]); |
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throw new \InvalidArgumentException($error); |
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} |
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return new $processor($query, $this); |
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} |
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/** |
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* @param string $entity |
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* @return ProcessorInterface |
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*/ |
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public function getProcessor(string $entity): ProcessorInterface |
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{ |
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$repository = $this->em->getRepository($entity); |
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if (\method_exists($repository, 'getProcessor')) { |
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return $repository->getProcessor(); |
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} |
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return new static($repository, $this->em); |
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} |
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} |
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