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<?php |
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namespace League\Route\Strategy; |
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use Exception; |
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use League\Route\Http\Exception as HttpException; |
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use League\Route\Middleware\ExecutionChain; |
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use League\Route\Route; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use RuntimeException; |
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class JsonStrategy implements StrategyInterface |
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{ |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getExecutionChain(Route $route, array $vars) |
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{ |
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$middleware = function ( |
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ServerRequestInterface $request, ResponseInterface $response, callable $next |
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) use ( |
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$route, $vars |
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) { |
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try { |
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$return = call_user_func_array($route->getCallable(), [$request, $response, $vars]); |
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if (! $return instanceof ResponseInterface) { |
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throw new RuntimeException( |
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'Route callables must return an instance of (Psr\Http\Message\ResponseInterface)' |
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); |
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} |
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$response = $return; |
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$response = $next($request, $response); |
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} catch (HttpException $e) { |
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return $e->buildJsonResponse($response); |
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} catch (Exception $e) { |
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$body = [ |
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'status_code' => 500, |
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'reason_phrase' => $e->getMessage() |
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]; |
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$response->getBody()->write(json_encode($body)); |
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$response = $response->withStatus(500); |
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} |
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return $response->withAddedHeader('content-type', 'application/json'); |
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}; |
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$execChain = (new ExecutionChain)->middleware($middleware); |
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// ensure middleware is executed in the order it was added |
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$stack = array_reverse($route->getMiddlewareStack()); |
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foreach ($stack as $middleware) { |
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$execChain->middleware($middleware); |
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} |
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return $execChain; |
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} |
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} |
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thephpleague /
route
