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<?php declare(strict_types=1); |
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/** |
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* This file is part of the daikon-cqrs/event-sourcing project. |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Daikon\EventSourcing\Aggregate\Event; |
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use Daikon\EventSourcing\Aggregate\AggregateRevision; |
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use Daikon\Interop\Assertion; |
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use Daikon\Interop\RuntimeException; |
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use Ds\Vector; |
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final class DomainEventSequence implements DomainEventSequenceInterface |
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{ |
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private Vector $compositeVector; |
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/** @param array $events */ |
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public static function fromNative($events): self |
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{ |
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return new self(array_map( |
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fn(array $state): DomainEventInterface => ([self::resolveEventFqcn($state), 'fromNative'])($state), |
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$events |
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)); |
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} |
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public static function makeEmpty(): self |
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{ |
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return new self; |
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} |
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public function __construct(iterable $events = []) |
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{ |
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$this->compositeVector = ( |
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fn(DomainEventInterface ...$events): Vector => new Vector($events) |
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)(...$events); |
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} |
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public function push(DomainEventInterface $event): self |
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{ |
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$expectedRevision = $this->getHeadRevision()->increment(); |
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if (!$this->isEmpty() && !$expectedRevision->equals($event->getAggregateRevision())) { |
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throw new RuntimeException(sprintf( |
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'Trying to add invalid revision %s to event-sequence, expected revision is %s.', |
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(string)$event->getAggregateRevision(), |
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(string)$expectedRevision |
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)); |
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} |
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$eventSequence = clone $this; |
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$eventSequence->compositeVector->push($event); |
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return $eventSequence; |
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} |
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public function append(DomainEventSequenceInterface $events): self |
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{ |
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$eventSequence = $this; |
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foreach ($events as $event) { |
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$eventSequence = $eventSequence->push($event); |
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} |
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return $eventSequence; |
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} |
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public function resequence(AggregateRevision $aggregateRevision): self |
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{ |
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$eventSequence = self::makeEmpty(); |
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foreach ($this as $event) { |
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$aggregateRevision = $aggregateRevision->increment(); |
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$eventSequence->compositeVector->push($event->withAggregateRevision($aggregateRevision)); |
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} |
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return $eventSequence; |
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} |
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public function toNative(): array |
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{ |
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$nativeList = []; |
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foreach ($this as $event) { |
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$nativeRep = $event->toNative(); |
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$nativeRep['@type'] = get_class($event); |
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$nativeList[] = $nativeRep; |
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} |
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return $nativeList; |
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} |
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public function getHeadRevision(): AggregateRevision |
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{ |
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if ($this->isEmpty()) { |
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return AggregateRevision::makeEmpty(); |
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} |
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return $this->getHead()->getAggregateRevision(); |
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} |
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public function getTailRevision(): AggregateRevision |
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{ |
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if ($this->isEmpty()) { |
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return AggregateRevision::makeEmpty(); |
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} |
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return $this->getTail()->getAggregateRevision(); |
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} |
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public function getTail(): DomainEventInterface |
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{ |
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return $this->compositeVector->first(); |
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} |
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public function getHead(): DomainEventInterface |
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{ |
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return $this->compositeVector->last(); |
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} |
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public function isEmpty(): bool |
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{ |
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return $this->compositeVector->isEmpty(); |
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} |
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public function indexOf(DomainEventInterface $event) |
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{ |
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return $this->compositeVector->find($event); |
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} |
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public function count(): int |
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{ |
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return $this->compositeVector->count(); |
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} |
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public function getIterator(): Vector |
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{ |
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return $this->compositeVector; |
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} |
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private static function resolveEventFqcn(array $eventState): string |
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{ |
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Assertion::keyIsset($eventState, '@type', "Missing expected key '@type' within given state array."); |
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$eventFqcn = $eventState['@type']; |
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Assertion::classExists($eventFqcn, "Cannot find event class '$eventFqcn' given within state array."); |
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return $eventFqcn; |
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} |
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private function __clone() |
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{ |
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$this->compositeVector = clone $this->compositeVector; |
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} |
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} |
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daikon-cqrs /
event-sourcing
