LIN3S\SharedKernel\Infrastructure\Application\Tactician\Middlewares\AppendDomainEventsToStoreMiddleware

Complexity

Total Complexity

4

Size/Duplication

Total Lines	36
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	6

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	1
A	execute()	0	21	2
A	streamVersion()	0	4	1

<?php

/*
 * This file is part of the Shared Kernel library.
 *
 * Copyright (c) 2016-present LIN3S <info@lin3s.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

declare(strict_types=1);

namespace LIN3S\SharedKernel\Infrastructure\Application\Tactician\Middlewares;

use League\Tactician\Middleware;
use LIN3S\SharedKernel\Domain\Event\CollectInMemoryDomainEventsSubscriber;
use LIN3S\SharedKernel\Domain\Event\DomainEventPublisher;
use LIN3S\SharedKernel\Event\EventStore;
use LIN3S\SharedKernel\Event\StoredEvent;
use LIN3S\SharedKernel\Event\StreamName;
use LIN3S\SharedKernel\Event\StreamVersion;

/**
 * @author Beñat Espiña <benatespina@gmail.com>
 */
class AppendDomainEventsToStoreMiddleware implements Middleware
{
    private $eventStore;

    public function __construct(EventStore $eventStore)
    {
        $this->eventStore = $eventStore;
    }

    public function execute($command, callable $next)
    {
        $collectDomainEventsSubscriber = new CollectInMemoryDomainEventsSubscriber();
        DomainEventPublisher::instance()->subscribe($collectDomainEventsSubscriber);

        $returnValue = $next($command);

        $publishableEvents = $collectDomainEventsSubscriber->events();
        $storedEvents = [];
        foreach ($publishableEvents as $publishableEvent) {
            $storedEvents[] = new StoredEvent(
                $publishableEvent->event(),
                StreamName::from($publishableEvent->aggregateId(), $publishableEvent->name()),
                $this->streamVersion()
            );
        }

        $this->eventStore->append(...$storedEvents);

        return $returnValue;
    }

    private function streamVersion() : StreamVersion
    {
        return new StreamVersion(1);    // TODO: This value is hardcoded for now.
    }
}