Daikon\ReadModel\Projection\EventHandlerTrait

Complexity

Total Complexity

3

Size/Duplication

Total Lines	17
Duplicated Lines	0 %

Test Coverage

Coverage

0%

Importance

Changes	1
Bugs	0	Features	0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	applyEvent()	0	3	1
A	invokeEventHandler()	0	10	2

<?php declare(strict_types=1);
/**
 * This file is part of the daikon-cqrs/read-model project.
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Daikon\ReadModel\Projection;

use Daikon\EventSourcing\Aggregate\Event\DomainEventInterface;
use Daikon\Interop\RuntimeException;
use ReflectionClass;

trait EventHandlerTrait
{
    public function applyEvent(DomainEventInterface $domainEvent): ProjectionInterface
    {
        return $this->invokeEventHandler($domainEvent);
    }

    private function invokeEventHandler(DomainEventInterface $event): ProjectionInterface
    {
        $handlerName = (new ReflectionClass($event))->getShortName();
        $handlerMethod = 'when'.ucfirst($handlerName);
        $projection = clone $this;
        $handler = [$projection, $handlerMethod];
        if (!is_callable($handler)) {
            throw new RuntimeException("Handler '$handlerMethod' is not callable on ".static::class);
        }
        return call_user_func($handler, $event);
    }
}