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<?php
declare(strict_types=1);
namespace League\Tactician\Handler;
use League\Tactician\Handler\Mapping\CommandToHandlerMapping;
use League\Tactician\Middleware;
use Psr\Container\ContainerInterface;
use function get_class;
/**
* Our basic middleware for executing commands.
*
* Feel free to use this as a starting point for your own middleware! :)
*/
final class CommandHandlerMiddleware implements Middleware
{
private ContainerInterface $container;
private CommandToHandlerMapping $mapping;
public function __construct(ContainerInterface $container, CommandToHandlerMapping $mapping)
$this->container = $container;
$this->mapping = $mapping;
}
* Executes a command and optionally returns a value
* @return mixed
public function execute(object $command, callable $next)
// 1. Based on the command we received, get the Handler method to call.
$methodToCall = $this->mapping->mapCommandToHandler(get_class($command));
// 2. Retrieve an instance of the Handler from our PSR-11 container
// This assumes the container id is the same as the class name but
// you can write your own middleware to change this assumption! :)
$handler = $this->container->get($methodToCall->getClassName());
// 3. Invoke the correct method on the handler and pass the command
return $handler->{$methodToCall->getMethodName()}($command);
thephpleague /
tactician
