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<?php |
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/* |
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* event-sourcing (https://github.com/phpgears/event-sourcing). |
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* Event Sourcing base. |
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* |
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* @license MIT |
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* @link https://github.com/phpgears/event-sourcing |
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* @author Julián Gutiérrez <[email protected]> |
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*/ |
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declare(strict_types=1); |
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namespace Gears\EventSourcing\Aggregate; |
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use Gears\EventSourcing\Aggregate\Exception\AggregateVersionException; |
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final class AggregateVersion implements \Serializable |
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{ |
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/** |
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* @var int |
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*/ |
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private $value; |
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/** |
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* Version constructor. |
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* |
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* @param int $value |
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* |
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* @throws AggregateVersionException |
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*/ |
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public function __construct(int $value) |
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{ |
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if ($value < 0) { |
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throw new AggregateVersionException(\sprintf('Version value should be higher than 0, "%s" given', $value)); |
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} |
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$this->value = $value; |
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} |
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/** |
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* Get version value. |
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* |
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* @return int |
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*/ |
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public function getValue(): int |
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{ |
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return $this->value; |
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} |
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/** |
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* Check equality. |
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* |
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* @param self $version |
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* |
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* @return bool |
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*/ |
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public function isEqualTo(self $version): bool |
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{ |
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return $this->value === $version->getValue(); |
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} |
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/** |
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* Get next version. |
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* |
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* @return self |
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*/ |
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public function getNext(): self |
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{ |
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$clone = clone $this; |
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$clone->value = $this->value + 1; |
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return $clone; |
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} |
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/** |
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* Get previous version. |
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* |
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* @throws AggregateVersionException |
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* |
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* @return AggregateVersion |
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*/ |
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public function getPrevious(): self |
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{ |
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if ($this->value === 0) { |
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throw new AggregateVersionException('Version value cannot be lowered below 0'); |
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} |
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$clone = clone $this; |
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$clone->value = $this->value - 1; |
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return $clone; |
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} |
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/** |
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* @return array<string, mixed> |
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*/ |
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public function __serialize(): array |
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{ |
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return ['value' => $this->value]; |
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} |
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/** |
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* @param array<string, mixed> $data |
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*/ |
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public function __unserialize(array $data): void |
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{ |
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$this->value = $data['value']; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function serialize(): string |
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{ |
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return \serialize($this->value); |
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} |
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/** |
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* {@inheritdoc} |
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* |
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* @param mixed $serialized |
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*/ |
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public function unserialize($serialized): void |
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{ |
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$this->value = \unserialize($serialized, ['allowed_classes' => false]); |
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} |
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} |
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phpgears /
event-sourcing
