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1 |
1 | <?php |
2 | |
3 | declare(strict_types=1); |
4 | |
5 | namespace Engelsystem\Middleware; |
6 | |
7 | use Engelsystem\Container\Container; |
8 | use Engelsystem\Http\Response; |
9 | use InvalidArgumentException; |
10 | use Psr\Http\Message\ResponseInterface; |
11 | use Psr\Http\Message\ServerRequestInterface; |
12 | use Psr\Http\Server\MiddlewareInterface; |
13 | use Psr\Http\Server\RequestHandlerInterface; |
14 | |
15 | /** |
16 | * Wraps a callable to be used to respond / as a middleware |
17 | */ |
18 | class CallableHandler implements MiddlewareInterface, RequestHandlerInterface |
19 | { |
20 | /** @var callable */ |
21 | protected $callable; |
22 | |
23 | /** |
24 | * @param callable $callable The callable that should be wrapped |
25 | */ |
26 | public function __construct(callable $callable, protected ?Container $container = null) |
27 | { |
28 | $this->callable = $callable; |
29 | } |
30 | |
31 | /** |
32 | * Process an incoming server request and return a response, optionally delegating |
33 | * response creation to a handler. |
34 | */ |
35 | public function process(ServerRequestInterface $request, RequestHandlerInterface $handler): ResponseInterface |
36 | { |
37 | return $this->execute([$request, $handler]); |
38 | } |
39 | |
40 | /** |
41 | * Handle the request and return a response. |
42 | */ |
43 | public function handle(ServerRequestInterface $request): ResponseInterface |
44 | { |
45 | return $this->execute([$request]); |
46 | } |
47 | |
48 | /** |
49 | * Execute the callable and return a response |
50 | */ |
51 | protected function execute(array $arguments = []): ResponseInterface |
52 | { |
53 | $return = call_user_func_array($this->callable, $arguments); |
54 | |
55 | if ($return instanceof ResponseInterface) { |
56 | return $return; |
57 | } |
58 | |
59 | if (!$this->container instanceof Container) { |
60 | throw new InvalidArgumentException('Unable to resolve response'); |
61 | } |
62 | |
63 | /** @var Response $response */ |
64 | $response = $this->container->get('response'); |
65 | return $response->withContent($return); |
66 | } |
67 | |
68 | public function getCallable(): callable |
69 | { |
70 | return $this->callable; |
71 | } |
72 | } |