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<?php |
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namespace Chocofamily\LaravelEventSauce\Traits; |
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use EventSauce\EventSourcing\AggregateRoot; |
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use EventSauce\EventSourcing\AggregateRootId; |
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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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private 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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/** |
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* @see AggregateRoot::aggregateRootVersion |
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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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protected function apply(object $event): void |
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{ |
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$parts = explode('\\', get_class($event)); |
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$method = 'apply'.end($parts); |
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if (method_exists($this, $method)) { |
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$this->$method($event); |
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$this->aggregateRootVersion++; |
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} |
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} |
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protected function recordThat(object $event): void |
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{ |
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$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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* @param AggregateRootId $aggregateRootId |
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* @param Generator $events |
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* @return AggregateRoot |
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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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/** @var AggregateRoot&\EventSauce\EventSourcing\AggregateRootBehaviour $aggregateRoot */ |
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$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($event); |
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} |
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$aggregateRoot->aggregateRootVersion = $events->getReturn() ?: 0; |
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/* @var AggregateRoot $aggregateRoot */ |
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return $aggregateRoot; |
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} |
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} |
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chocofamilyme /
laravel-eventsauce
