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<?php |
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/** |
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* This file is part of the daikon-cqrs/cqrs 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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declare(strict_types=1); |
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namespace Daikon\EventSourcing\EventStore\Stream; |
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use Daikon\EventSourcing\Aggregate\AggregateRevision; |
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use Daikon\EventSourcing\Aggregate\Event\DomainEventSequenceInterface; |
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use Daikon\EventSourcing\EventStore\Commit\Commit; |
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use Daikon\EventSourcing\EventStore\Commit\CommitInterface; |
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use Daikon\EventSourcing\EventStore\Commit\CommitSequence; |
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use Daikon\EventSourcing\EventStore\Commit\CommitSequenceInterface; |
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use Daikon\MessageBus\Metadata\Metadata; |
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final class Stream implements StreamInterface |
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{ |
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/** @var StreamIdInterface */ |
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private $streamId; |
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/** @var CommitSequenceInterface */ |
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private $commitSequence; |
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/** @var string */ |
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private $commitImplementor; |
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public static function fromStreamId( |
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StreamIdInterface $streamId, |
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string $commitImplementor = Commit::class |
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): StreamInterface { |
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return new static($streamId); |
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} |
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public static function fromArray(array $streamState): Stream |
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{ |
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return new static( |
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StreamId::fromNative($streamState['commitStreamId']), |
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CommitSequence::fromArray($streamState['commitStreamSequence']), |
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$streamState['commitImplementor'] |
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); |
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} |
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public function __construct( |
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StreamIdInterface $streamId, |
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CommitSequenceInterface $commitSequence = null, |
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string $commitImplementor = Commit::class |
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) { |
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$this->streamId = $streamId; |
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$this->commitSequence = $commitSequence ?? new CommitSequence; |
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$this->commitImplementor = $commitImplementor; |
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} |
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public function getStreamId(): StreamIdInterface |
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{ |
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return $this->streamId; |
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} |
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public function getStreamRevision(): StreamRevision |
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{ |
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return StreamRevision::fromNative($this->commitSequence->getLength()); |
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} |
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public function getAggregateRevision(): AggregateRevision |
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{ |
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$head = $this->commitSequence->getHead(); |
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return $head ? $head->getAggregateRevision() : AggregateRevision::makeEmpty(); |
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} |
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public function appendEvents(DomainEventSequenceInterface $eventLog, Metadata $metadata): StreamInterface |
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{ |
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return $this->appendCommit( |
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call_user_func( |
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[ $this->commitImplementor, 'make' ], |
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$this->streamId, |
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$this->getStreamRevision()->increment(), |
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$eventLog, |
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$metadata |
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) |
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); |
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} |
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public function appendCommit(CommitInterface $commit): StreamInterface |
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{ |
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$stream = clone $this; |
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$stream->commitSequence = $this->commitSequence->push($commit); |
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return $stream; |
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} |
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public function getHead(): ?CommitInterface |
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{ |
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return $this->commitSequence->isEmpty() ? null : $this->commitSequence->getHead(); |
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} |
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public function getCommitRange(StreamRevision $fromRev, StreamRevision $toRev = null): CommitSequenceInterface |
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{ |
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return $this->commitSequence->getSlice($fromRev, $toRev ?? $this->getStreamRevision()); |
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} |
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public function count(): int |
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{ |
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return $this->commitSequence->count(); |
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} |
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public function isEmpty(): bool |
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{ |
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return $this->count() === 0; |
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} |
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public function toNative(): array |
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{ |
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return [ |
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'commitSequence' => $this->commitSequence->toNative(), |
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'streamId' => $this->streamId->toNative(), |
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'commitImplementor' => $this->commitImplementor |
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]; |
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} |
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public function getIterator(): \Traversable |
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{ |
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return $this->commitSequence->getIterator(); |
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} |
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public function findCommitsSince(AggregateRevision $incomingRevision): CommitSequenceInterface |
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{ |
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$previousCommits = []; |
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$prevCommit = $this->getHead(); |
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while ($prevCommit && $incomingRevision->isLessThan($prevCommit->getAggregateRevision())) { |
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$previousCommits[] = $prevCommit; |
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$prevCommit = $this->commitSequence->get($prevCommit->getStreamRevision()->decrement()); |
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} |
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return new CommitSequence(array_reverse($previousCommits)); |
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} |
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} |
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daikon-cqrs /
event-sourcing
