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<?php
namespace Engelsystem\Middleware;
use Engelsystem\Container\Container;
use Engelsystem\Http\Response;
use InvalidArgumentException;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Server\MiddlewareInterface;
use Psr\Http\Server\RequestHandlerInterface;
class CallableHandler implements MiddlewareInterface, RequestHandlerInterface
{
/** @var callable */
protected $callable;
/** @var Container */
protected $container;
/**
* @param callable $callable The callable that should be wrapped
* @param Container $container
*/
public function __construct(callable $callable, Container $container = null)
{
$this->callable = $callable;
$this->container = $container;
}
/**
* Process an incoming server request and return a response, optionally delegating
* response creation to a handler.
*
* @param ServerRequestInterface $request
* @param RequestHandlerInterface $handler
* @return ResponseInterface
*/
public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface
{
return $this->execute([$request, $handler]);
}
/**
* Handle the request and return a response.
*
* @param ServerRequestInterface $request
* @return ResponseInterface
*/
public function handle(ServerRequestInterface $request): ResponseInterface
{
return $this->execute([$request]);
}
/**
* Execute the callable and return a response
*
* @param array $arguments
* @return ResponseInterface
*/
protected function execute(array $arguments = []): ResponseInterface
{
$return = call_user_func_array($this->callable, $arguments);
if ($return instanceof ResponseInterface) {
return $return;
}
if (!$this->container instanceof Container) {
throw new InvalidArgumentException('Unable to resolve response');
}
/** @var Response $response */
$response = $this->container->get('response');
return $response->withContent($return);
}
}
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