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<?php |
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declare(strict_types=1); |
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namespace Stratadox\EntityState; |
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use function array_key_exists as alreadyAdded; |
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use function array_shift; |
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use function count; |
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use function get_class as classOfThe; |
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use Stratadox\EntityState\Internal\AcceptsNewEntities; |
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use Stratadox\EntityState\Internal\CollectionExtractor; |
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use Stratadox\EntityState\Internal\EntityReferenceExtractor; |
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use Stratadox\EntityState\Internal\ExtractionRequest; |
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use Stratadox\EntityState\Internal\Extractor; |
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use Stratadox\EntityState\Internal\NewEntityDetector; |
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use Stratadox\EntityState\Internal\ObjectExtractor; |
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use Stratadox\EntityState\Internal\PropertyExtractor; |
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use Stratadox\EntityState\Internal\ScalarExtractor; |
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use Stratadox\EntityState\Internal\ShouldStringify; |
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use Stratadox\EntityState\Internal\Stringifier; |
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use Stratadox\IdentityMap\MapsObjectsByIdentity as Map; |
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use Stratadox\IdentityMap\NoSuchObject; |
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/** |
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* Extract the state of the entities. |
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* |
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* @author Stratadox |
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*/ |
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final class Extract implements ExtractsEntityState, AcceptsNewEntities |
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{ |
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private $extractor; |
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private $newEntities = []; |
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private function __construct(Extractor $extractor) |
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{ |
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$this->extractor = $extractor; |
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} |
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/** |
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* Produces a state extractor. |
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* |
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* @return ExtractsEntityState |
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*/ |
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public static function state(): ExtractsEntityState |
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{ |
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return new Extract( |
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PropertyExtractor::using( |
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CollectionExtractor::withAlternative( |
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EntityReferenceExtractor::withAlternative( |
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ObjectExtractor::withAlternative( |
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ScalarExtractor::asLastResort() |
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) |
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) |
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) |
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) |
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); |
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} |
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/** |
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* Produces a state extractor that converts certain types to string. |
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* |
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* @param mixed ...$classes |
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* @return ExtractsEntityState |
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*/ |
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public static function stringifying(...$classes): ExtractsEntityState |
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{ |
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return new Extract( |
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PropertyExtractor::using( |
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CollectionExtractor::withAlternative( |
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Stringifier::withCondition( |
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ShouldStringify::these(...$classes), |
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EntityReferenceExtractor::withAlternative( |
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ObjectExtractor::withAlternative( |
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ScalarExtractor::asLastResort() |
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) |
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) |
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) |
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) |
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) |
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); |
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} |
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/** @inheritdoc */ |
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public function consideringIt( |
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DefinesEntityType ...$asEntities |
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): ExtractsEntityState { |
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$new = clone $this; |
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$new->extractor = NewEntityDetector::with($new, $this->extractor, ...$asEntities); |
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return $new; |
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} |
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/** @inheritdoc */ |
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public function from(Map $map): State |
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{ |
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return $this->fromOnly($map, ...$map->objects()); |
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} |
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/** @inheritdoc */ |
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public function fromOnly(Map $map, object ...$objects): State |
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{ |
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$states = []; |
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foreach ($objects as $object) { |
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$states[] = $this->stateOfThe($object, $map, $map->idOf($object)); |
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} |
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while (count($this->newEntities)) { |
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$newEntity = array_shift($this->newEntities); |
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[$object, $id] = $newEntity; |
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$map = $map->add($id, $object); |
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$states[] = $this->stateOfThe($object, $map, $id); |
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} |
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return StateRepresentation::with(EntityStates::list(...$states), $map); |
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} |
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/** |
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* @inheritdoc |
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* @internal |
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*/ |
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public function addAsNewEntity(object $newEntity, string $id): void |
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{ |
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$identifier = classOfThe($newEntity) . '~' . $id; |
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if (!alreadyAdded($identifier, $this->newEntities)) { |
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$this->newEntities[$identifier] = [$newEntity, $id]; |
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} |
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} |
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/** @throws NoSuchObject */ |
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private function stateOfThe( |
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object $entity, |
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Map $map, |
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string $id |
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): RepresentsEntity { |
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return EntityState::ofThe(classOfThe($entity), $id, PropertyStates::list( |
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...$this->extractor->extract( |
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ExtractionRequest::for($entity, $map) |
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) |
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)); |
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} |
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} |
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Stratadox /
EntityState
