Borobudur\Cqrs\Bus\EventBus

Complexity

Total Complexity

13

Size/Duplication

Total Lines	100
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	4

Importance

Changes

0

6 Methods

Rating	Name	Duplication	Size	Complexity
A	__construct()	0	4	2
A	getName()	0	4	1
A	registers()	0	12	4
A	register()	0	6	1
A	getClosureHandler()	0	15	3
A	dispatchNow()	0	14	2

<?php
/*
 * This file is part of the Borobudur-Cqrs package.
 *
 * (c) Hexacodelabs <http://hexacodelabs.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Borobudur\Cqrs\Bus;

use Borobudur\Bus\Bus;
use Borobudur\Bus\Exception\LogicException;
use Borobudur\Bus\Message\MessageInterface;
use Borobudur\Cqrs\Exception\InvalidArgumentException;
use Borobudur\Cqrs\Message\AbstractDomainEvent;
use Borobudur\EventDispatcher\EventDispatcher;
use Closure;

/**
 * @author      Iqbal Maulana <iq.bluejack@gmail.com>
 * @created     8/18/15
 */
class EventBus extends Bus
{
    const BUS_NAME = 'bus.event';

    /**
     * @var EventDispatcher
     */
    protected $dispatcher;

    /**
     * @var array
     */
    protected $responses = array();

    /**
     * Constructor.
     *
     * @param EventDispatcher|null $dispatcher
     */
    public function __construct(EventDispatcher $dispatcher = null)
    {
        $this->dispatcher = $dispatcher ?: new EventDispatcher();
    }

    /**
     * {@inheritdoc}
     */
    public function getName()
    {
        return EventBus::BUS_NAME;
    }

    /**
     * {@inheritdoc}
     */
    public function registers(array $events)
    {
        foreach ($events as $event => $handler) {
            if (is_array($handler)) {
                foreach ($handler as $h) {
                    $this->register($event, $h);
                }
            } else {
                $this->register($event, $handler);
            }
        }
    }

    /**
     * {@inheritdoc}
     */
    public function register($event, $handler)
    {
        $name = ltrim($event, '\\');
        $this->messages[$name][] = $handler;
        $this->dispatcher->addListener($name, $this->getClosureHandler($handler, $name));
    }

    /**
     * {@inheritdoc}
     */
    public function dispatchNow(MessageInterface $event)
    {
        if (!$event instanceof AbstractDomainEvent) {
            throw new InvalidArgumentException(sprintf(
                'Domain event "%s" should implement \Borobudur\Cqrs\Message\AbstractDomainEvent',
                get_class($event)
            ));
        }

        $this->responses = array();
        $this->dispatcher->fireEvent(ltrim(get_class($event), '\\'), $event);

        return $this->responses;
    }

    /**
     * Get event handler.
     *
     * @param mixed  $handler
     * @param string $class
     *
     * @return Closure
     */
    protected function getClosureHandler($handler, $class)
    {
        return function (MessageInterface $message) use ($handler, $class) {
            $class = ltrim(get_class($message), '\\');
            if (!isset($this->messages[$class])) {
                throw new LogicException(sprintf('Message "%s" does not have handler.', $class));
            }

            if (null !== ($response = $this->invoke($message, $handler, $class))) {
                $this->responses[] = $response;
            }

            return $response;
        };
    }
}