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<?php |
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declare(strict_types=1); |
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namespace Yiisoft\Yii\Event; |
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use Psr\Container\ContainerExceptionInterface; |
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use function get_class; |
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use function gettype; |
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use function is_object; |
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use function is_string; |
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/** |
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* ListenerConfigurationChecker could be used in development mode to check if listeners are defined correctly. |
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* |
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* ```php |
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* $checker->check($configuration->get('events-web')); |
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* ``` |
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*/ |
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final class ListenerConfigurationChecker |
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{ |
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private CallableFactory $callableFactory; |
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public function __construct(CallableFactory $callableFactory) |
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{ |
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$this->callableFactory = $callableFactory; |
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} |
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/** |
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* Checks the given event configuration and throws an exception in some cases: |
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* - incorrect configuration format |
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* - incorrect listener format |
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* - listener is not a callable |
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* - listener is meant to be a method of an object which can't be instantiated |
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* |
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* @param array $configuration An array in format of [eventClassName => [listeners]] |
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*/ |
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public function check(array $configuration): void |
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{ |
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foreach ($configuration as $eventName => $listeners) { |
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if (!is_string($eventName) || !class_exists($eventName)) { |
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throw new InvalidEventConfigurationFormatException( |
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'Incorrect event listener format. Format with event name must be used. Got ' . |
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var_export($eventName, true) . '.' |
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); |
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} |
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if (!is_iterable($listeners)) { |
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$type = is_object($listeners) ? get_class($listeners) : gettype($listeners); |
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throw new InvalidEventConfigurationFormatException( |
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"Event listeners for $eventName must be an iterable, $type given." |
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); |
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} |
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/** @var mixed */ |
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foreach ($listeners as $listener) { |
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try { |
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if (!$this->isCallable($listener)) { |
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throw new InvalidListenerConfigurationException( |
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'Listener must be a callable. Got ' . $this->listenerDump($listener) . '.' |
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); |
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} |
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} catch (ContainerExceptionInterface $exception) { |
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throw new InvalidListenerConfigurationException( |
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'Could not instantiate event listener or listener class has invalid configuration. Got ' . |
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$this->listenerDump($listener) . '.', |
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0, |
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$exception |
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); |
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} |
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} |
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} |
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} |
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/** |
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* @param mixed $definition |
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* |
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* @throws ContainerExceptionInterface Error while retrieving the entry from container. |
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*/ |
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private function isCallable($definition): bool |
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{ |
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try { |
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$this->callableFactory->create($definition); |
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} catch (InvalidListenerConfigurationException $e) { |
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return false; |
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} |
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return true; |
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} |
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/** |
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* @param mixed $listener |
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*/ |
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private function listenerDump($listener): string |
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{ |
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return is_object($listener) ? get_class($listener) : var_export($listener, true); |
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} |
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} |
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yiisoft /
yii-event
