event-dispatcher/EventDispatcher.php at 4.x · QubusPHP/event-dispatcher · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
<?php

declare(strict_types=1);

namespace Qubus\EventDispatcher;

use Psr\EventDispatcher\EventDispatcherInterface;
use Psr\EventDispatcher\ListenerProviderInterface;
use Psr\EventDispatcher\StoppableEventInterface;

class EventDispatcher implements EventDispatcherInterface
{
    /** @var ?ListenerProviderInterface */
    private ?ListenerProviderInterface $listenerProvider = null;

    public function __construct(ListenerProviderInterface $listenerProvider)
    {
        $this->listenerProvider = $listenerProvider;
    }

    /**
     * {@inheritDoc}
     */
    public function dispatch(object $event): object
    {
        /** @var callable[] $listeners */
        $listeners = $this->listenerProvider->getListenersForEvent($event);
        foreach ($listeners as $listener) {
            if ($event instanceof StoppableEventInterface && $event->isPropagationStopped()) {
                return $event;
            }
            $listener($event);
        }

        return $event;
    }
}