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<?php |
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declare(strict_types=1); |
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namespace EventSauce\EventSourcing; |
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use SplObjectStorage; |
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/** |
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* @template T of EventSourcedAggregate |
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*/ |
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trait AggregateRootWithAggregates |
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{ |
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use AggregateRootBehaviour, AggregateAppliesKnownEvents { |
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AggregateAppliesKnownEvents::apply as applyOnAggregateRoot; |
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} |
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/** |
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* @var ?SplObjectStorage<T> |
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*/ |
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private ?SplObjectStorage $aggregatesInsideRoot = null; |
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private ?EventRecorder $eventRecorder = null; |
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protected function eventRecorder(): EventRecorder |
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{ |
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if (null === $this->eventRecorder) { |
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$this->eventRecorder = new EventRecorder(fn (object $event) => $this->recordThat($event)); |
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} |
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return $this->eventRecorder; |
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} |
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/** |
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* @return SplObjectStorage<T> |
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*/ |
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private function aggregatesInsideRoot(): SplObjectStorage |
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{ |
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if (null === $this->aggregatesInsideRoot) { |
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$this->aggregatesInsideRoot = new SplObjectStorage(); |
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} |
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return $this->aggregatesInsideRoot; |
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} |
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private function registerAggregate(?EventSourcedAggregate $aggregate): void |
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{ |
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if ($aggregate instanceof EventSourcedAggregate) { |
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$this->aggregatesInsideRoot()->attach($aggregate); |
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} |
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} |
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private function unregisterAggregate(?EventSourcedAggregate $aggregate): void |
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{ |
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if ($aggregate instanceof EventSourcedAggregate) { |
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$this->aggregatesInsideRoot()->detach($aggregate); |
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} |
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} |
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protected function apply(object $event): void |
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{ |
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$this->applyOnAggregateRoot($event); |
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/** @var EventSourcedAggregate $aggregate */ |
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foreach ($this->aggregatesInsideRoot() as $aggregate) { |
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$aggregate->apply($event); |
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} |
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} |
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} |
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EventSaucePHP /
EventSauce
