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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 Generator; |
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trait AggregateRootBehaviour |
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{ |
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/** |
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* @var AggregateRootId |
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*/ |
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private $aggregateRootId; |
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/** |
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* @var int |
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*/ |
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private $aggregateRootVersion = 0; |
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/** |
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* @var object[] |
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*/ |
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private $recordedEvents = []; |
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public function __construct(AggregateRootId $aggregateRootId) |
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{ |
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$this->aggregateRootId = $aggregateRootId; |
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} |
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public function aggregateRootId(): AggregateRootId |
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{ |
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return $this->aggregateRootId; |
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} |
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public function aggregateRootVersion(): int |
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{ |
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return $this->aggregateRootVersion; |
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} |
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/** |
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* @param AggregateRootId $aggregateRootId |
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* @param Generator $events |
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* |
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* @return static |
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* @see AggregateRoot::reconstituteFromEvents |
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*/ |
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public static function reconstituteFromEvents(AggregateRootId $aggregateRootId, Generator $events): AggregateRoot |
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{ |
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$aggregateRoot = new static($aggregateRootId); |
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/** @var object $event */ |
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foreach ($events as $event) { |
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$aggregateRoot->apply($event); |
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} |
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return $aggregateRoot; |
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} |
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protected function apply(object $event) |
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{ |
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$parts = explode('\\', get_class($event)); |
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$this->{'apply' . end($parts)}($event); |
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$this->aggregateRootVersion++; |
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} |
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protected function recordThat(object $event) |
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{ |
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$this->apply($event); |
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$this->recordedEvents[] = $event; |
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} |
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/** |
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* @return object[] |
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*/ |
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public function releaseEvents(): array |
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{ |
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$releasedEvents = $this->recordedEvents; |
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$this->recordedEvents = []; |
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return $releasedEvents; |
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} |
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} |
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EventSaucePHP /
EventSauce
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