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<?php |
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declare(strict_types=1); |
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/** |
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* GpsLab component. |
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* |
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* @author Peter Gribanov <[email protected]> |
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* @copyright Copyright (c) 2011, Peter Gribanov |
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* @license http://opensource.org/licenses/MIT |
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*/ |
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namespace GpsLab\Component\Query\Handler\Locator; |
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use GpsLab\Component\Query\Handler\QuerySubscriber; |
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use GpsLab\Component\Query\Query; |
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use Psr\Container\ContainerInterface; |
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class ContainerQueryHandlerLocator implements QueryHandlerLocator |
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{ |
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/** |
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* @var ContainerInterface |
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*/ |
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private $container; |
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/** |
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* @var array[] |
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*/ |
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private $query_handler_ids = []; |
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/** |
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* @param ContainerInterface $container |
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*/ |
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public function __construct(ContainerInterface $container) |
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{ |
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$this->container = $container; |
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} |
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/** |
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* @param Query $query |
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* |
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* @return callable|null |
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*/ |
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public function findHandler(Query $query): ?callable |
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{ |
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return $this->lazyLoad(get_class($query)); |
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} |
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/** |
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* @param string $query_name |
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* @param string $service |
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* @param string $method |
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*/ |
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public function registerService(string $query_name, string $service, string $method = '__invoke'): void |
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{ |
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$this->query_handler_ids[$query_name] = [$service, $method]; |
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} |
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/** |
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* @param string $service_name |
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* @param string $class_name |
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*/ |
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public function registerSubscriberService(string $service_name, string $class_name): void |
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{ |
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$get_subscribed_queries = [$class_name, 'getSubscribedQueries']; |
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if (is_callable($get_subscribed_queries) && is_a($class_name, QuerySubscriber::class, true)) { |
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foreach ($get_subscribed_queries() as $query_name => $method) { |
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$this->registerService($query_name, $service_name, $method); |
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} |
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} |
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1 |
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} |
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/** |
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* @param string $query_name |
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* |
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* @return callable|null |
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*/ |
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private function lazyLoad(string $query_name): ?callable |
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{ |
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if (isset($this->query_handler_ids[$query_name])) { |
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[$service, $method] = $this->query_handler_ids[$query_name]; |
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return $this->resolve($this->container->get($service), $method); |
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} |
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return null; |
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} |
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/** |
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* @param mixed $service |
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* @param string $method |
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* |
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* @return callable|null |
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*/ |
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private function resolve($service, string $method): ?callable |
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{ |
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if (is_callable($service)) { |
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return $service; |
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} |
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$handler = [$service, $method]; |
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if (is_callable($handler)) { |
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return $handler; |
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} |
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return null; |
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} |
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} |
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gpslab /
cqrs
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This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.