GpsLab\Bundle\DomainEvent\Event\Listener\DomainEventPublisher

Complexity

Total Complexity

11

Size/Duplication

Total Lines	76
Duplicated Lines	0 %

Coupling/Cohesion

Components	2
Dependencies	5

Test Coverage

Coverage

100%

Importance

Changes

0

4 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	5	1
A	getSubscribedEvents()	0	10	2
A	postFlush()	0	10	2
B	publish()	0	20	6

<?php

/**
 * GpsLab component.
 *
 * @author    Peter Gribanov <info@peter-gribanov.ru>
 * @copyright Copyright (c) 2011, Peter Gribanov
 * @license   http://opensource.org/licenses/MIT
 */

namespace GpsLab\Bundle\DomainEvent\Event\Listener;

use Doctrine\Common\EventSubscriber;
use Doctrine\Common\Persistence\Proxy;
use Doctrine\ORM\Event\PostFlushEventArgs;
use Doctrine\ORM\Events;
use GpsLab\Domain\Event\Aggregator\AggregateEvents;
use GpsLab\Domain\Event\Bus\EventBus;

class DomainEventPublisher implements EventSubscriber
{
    /**
     * @var EventBus
     */
    private $bus;

    /**
     * @var bool
     */
    private $enable;

    /**
     * @param EventBus $bus
     * @param bool     $enable
     */
    public function __construct(EventBus $bus, $enable)
    {
        $this->bus = $bus;
        $this->enable = $enable;
    }

    /**
     * @return array
     */
    public function getSubscribedEvents()
    {
        if (!$this->enable) {
            return [];
        }

        return [
            Events::postFlush,
        ];
    }

    /**
     * @param PostFlushEventArgs $args
     */
    public function postFlush(PostFlushEventArgs $args)
    {
        $map = $args->getEntityManager()->getUnitOfWork()->getIdentityMap();

        // flush only if has domain events
        // it necessary for fix recursive handle flush
        if ($this->publish($map)) {
            $args->getEntityManager()->flush();
        }
    }

    /**
     * @param array $map
     *
     * @return bool
     */
    private function publish(array $map)
    {
        $has_events = false;
        foreach ($map as $entities) {
            foreach ($entities as $entity) {
                // ignore Doctrine proxy classes
                // proxy class can't have a domain events
                if ($entity instanceof Proxy || !($entity instanceof AggregateEvents)) {
                    break;
                }

                foreach ($entity->pullEvents() as $event) {
                    $this->bus->publish($event);
                    $has_events = true;
                }
            }
        }

        return $has_events;
    }
}