Skautis\EventDispatcher\EventDispatcherTrait

Complexity

Total Complexity

6

Size/Duplication

Total Lines	31
Duplicated Lines	0 %

Coupling/Cohesion

Components	1
Dependencies	0

Test Coverage

Coverage

90.91%

Importance

Changes

0

3 Methods

Rating	Name	Duplication	Size	Complexity
A	hasListeners()	0	4	2
A	dispatch()	0	10	3
A	subscribe()	0	4	1

<?php
declare(strict_types = 1);

namespace Skautis\EventDispatcher;

trait EventDispatcherTrait
{

    /** @var callable[] */
    private $listeners = [];


    protected function hasListeners(?string $eventName = null): bool
    {
        return $eventName === null ? !empty($this->listeners) : !empty($this->listeners[$eventName]);
    }

    /**
     * @param mixed $data
     */
    protected function dispatch(string $eventName, $data): void
    {
        if (!$this->hasListeners($eventName)) {
            return;
        }

        foreach ($this->listeners[$eventName] as $callback) {
            $callback($data);
        }
    }

    public function subscribe(string $eventName, callable $callback): void
    {
        $this->listeners[$eventName][] = $callback;
    }
}