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<?php
declare(strict_types=1);
/**
* @author : Jagepard <[email protected]>
* @license https://mit-license.org/ MIT
*/
namespace Behavioral\ChainOfResponsibility;
class Chain implements ChainInterface
{
* @var array
private $chain = [];
* @param HandlerInterface $handler
public function addToChain(HandlerInterface $handler): void
$handlerName = get_class($handler);
if (array_key_exists($handlerName, $this->chain)) {
throw new \InvalidArgumentException('Handler already exists');
}
$this->chain[$handlerName] = $handler;
* @param string $handlerName
* @throws \Exception
public function execute(string $handlerName): void
if (!count($this->chain)) {
throw new \Exception('The chain is empty');
foreach ($this->chain as $handler) {
$handler->execute();
if (get_class($handler) === $handlerName) {
return;
throw new \InvalidArgumentException('Handler does not exist in the chain');
Jagepard /
PhpDesignPatterns-ChainOfResponsibility
