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<?php |
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/** |
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* Event Sourcing implementation. |
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* |
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* @author Maksim Masiukevich <[email protected]> |
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* @license MIT |
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* @license https://opensource.org/licenses/MIT |
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*/ |
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declare(strict_types = 1); |
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namespace ServiceBus\EventSourcing\EventStream; |
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use ServiceBus\EventSourcing\AggregateId; |
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/** |
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* Event stream. |
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* |
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* @psalm-readonly |
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*/ |
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final class AggregateEventStream |
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{ |
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/** |
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* Stream (aggregate) identifier. |
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*/ |
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public AggregateId $id; |
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/** |
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* Aggregate class. |
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* |
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* @psalm-var class-string<\ServiceBus\EventSourcing\Aggregate> |
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*/ |
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public string $aggregateClass; |
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/** |
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* Event collection. |
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* |
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* @psalm-var array<int, \ServiceBus\EventSourcing\EventStream\AggregateEvent> |
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* |
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* @var \ServiceBus\EventSourcing\EventStream\AggregateEvent[] |
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*/ |
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public array $events; |
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/** |
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* Origin event collection. |
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* |
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* @psalm-var array<int, object> |
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* |
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* @var object[] |
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*/ |
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public array $originEvents; |
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/** |
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* Created at datetime. |
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*/ |
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public \DateTimeImmutable $createdAt; |
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/** |
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* Closed at datetime. |
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*/ |
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public ?\DateTimeImmutable $closedAt = null; |
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/** |
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* @psalm-param class-string<\ServiceBus\EventSourcing\Aggregate> $aggregateClass |
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* @psalm-param array<int, \ServiceBus\EventSourcing\EventStream\AggregateEvent> $events |
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* |
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* @param \ServiceBus\EventSourcing\EventStream\AggregateEvent[] $events |
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*/ |
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public function __construct( |
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AggregateId $id, |
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string $aggregateClass, |
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array $events, |
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\DateTimeImmutable $createdAt, |
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?\DateTimeImmutable $closedAt |
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) |
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{ |
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$this->id = $id; |
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$this->aggregateClass = $aggregateClass; |
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$this->events = self::sortEvents($events); |
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$this->originEvents = self::extractOriginEvents($this->events); |
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$this->createdAt = $createdAt; |
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$this->closedAt = $closedAt; |
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} |
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/** |
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* @psalm-param array<int, \ServiceBus\EventSourcing\EventStream\AggregateEvent> $events |
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* |
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* @psalm-return array<int, \ServiceBus\EventSourcing\EventStream\AggregateEvent> |
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*/ |
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private static function sortEvents(array $events): array |
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{ |
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$result = []; |
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foreach($events as $aggregateEvent) |
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{ |
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/** @var \ServiceBus\EventSourcing\EventStream\AggregateEvent $aggregateEvent */ |
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$result[$aggregateEvent->playhead] = $aggregateEvent; |
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} |
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\ksort($result); |
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return $result; |
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} |
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/** |
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* @psalm-param array<int, \ServiceBus\EventSourcing\EventStream\AggregateEvent> $events |
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* @psalm-return array<int, object> |
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* |
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* @param \ServiceBus\EventSourcing\EventStream\AggregateEvent[] $events |
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* |
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* @return object[] |
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*/ |
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private static function extractOriginEvents(array $events): array |
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{ |
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return \array_map( |
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static function(AggregateEvent $event): object |
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{ |
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return $event->event; |
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}, |
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$events |
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); |
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} |
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} |
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php-service-bus /
event-sourcing
