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<?php |
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namespace Fesor\RequestObject; |
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use Symfony\Component\HttpFoundation\Request; |
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use Symfony\Component\HttpFoundation\Response; |
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use Symfony\Component\Validator\ConstraintViolationListInterface; |
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use Symfony\Component\Validator\Validator\ValidatorInterface; |
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class RequestObjectBinder |
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{ |
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/** |
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* @var ValidatorInterface |
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*/ |
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private $validator; |
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/** |
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* @var PayloadResolver |
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*/ |
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private $payloadResolver; |
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/** |
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* @var ErrorResponseProvider|null |
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*/ |
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private $errorResponseProvider; |
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/** |
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* RequestObjectBinder constructor. |
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* @param PayloadResolver $payloadResolver |
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* @param ValidatorInterface $validator |
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* @param ErrorResponseProvider|null $errorResponseProvider |
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*/ |
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public function __construct( |
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PayloadResolver $payloadResolver, |
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ValidatorInterface $validator, |
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ErrorResponseProvider $errorResponseProvider = null |
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) |
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{ |
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$this->validator = $validator; |
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$this->payloadResolver = $payloadResolver; |
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$this->errorResponseProvider = $errorResponseProvider; |
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} |
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/** |
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* @param Request $request |
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* @param callable $action |
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* @return Response|null |
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*/ |
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public function bind(Request $request, callable $action) |
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{ |
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$matchedArguments = $this->matchActionArguments($action); |
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if (!isset($matchedArguments['requestObject'])) { |
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return null; |
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} |
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$requestObjectClass = $matchedArguments['requestObject']->getClass()->name; |
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/** @var RequestObject $requestObject */ |
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$requestObject = new $requestObjectClass(); |
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$request->attributes->set( |
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$matchedArguments['requestObject']->name, |
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$requestObject |
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); |
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$payload = $this->resolvePayload($requestObject, $request); |
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$errors = $this->validator->validate( |
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$payload, |
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$requestObject->rules(), |
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$requestObject->validationGroup($payload) |
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); |
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$requestObject->setPayload($payload); |
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if (isset($matchedArguments['errors'])) { |
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$request->attributes->set($matchedArguments['errors']->name, $errors); |
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} elseif (0 !== count($errors)) { |
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return $this->providerErrorResponse($requestObject, $errors); |
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} |
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return null; |
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} |
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/** |
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* @param RequestObject $requestObject |
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* @param ConstraintViolationListInterface $errors |
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* @return Response |
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* @throws InvalidRequestPayloadException |
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*/ |
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private function providerErrorResponse(RequestObject $requestObject, ConstraintViolationListInterface $errors) |
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{ |
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if ($requestObject instanceof ErrorResponseProvider) { |
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return $requestObject->getErrorResponse($errors); |
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} |
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if ($this->errorResponseProvider) { |
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return $this->errorResponseProvider->getErrorResponse($errors); |
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} |
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throw new InvalidRequestPayloadException($requestObject, $errors); |
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} |
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/** |
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* @param callable $action |
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* @return \ReflectionParameter |
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*/ |
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private function matchActionArguments(callable $action) |
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{ |
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if (is_array($action)) { |
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$classReflection = new \ReflectionClass($action[0]); |
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$actionReflection = $classReflection->getMethod($action[1]); |
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} else { |
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$actionReflection = new \ReflectionFunction($action); |
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} |
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$matchedArguments = []; |
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$arguments = $actionReflection->getParameters(); |
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foreach ($arguments as $argument) { |
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if ($this->isArgumentIsSubtypeOf($argument, RequestObject::class)) { |
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$matchedArguments['requestObject'] = $argument; |
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} |
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if ($this->isArgumentIsSubtypeOf($argument, ConstraintViolationListInterface::class)) { |
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$matchedArguments['errors'] = $argument; |
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} |
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} |
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return $matchedArguments; |
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} |
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private function resolvePayload(RequestObject $requestObject, Request $request) |
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{ |
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if ($requestObject instanceof PayloadResolver) { |
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return $requestObject->resolvePayload($request); |
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} |
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return $this->payloadResolver->resolvePayload($request); |
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} |
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/** |
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* @param \ReflectionParameter $argument |
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* @param string $subtype |
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* @return bool |
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*/ |
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private function isArgumentIsSubtypeOf(\ReflectionParameter $argument, $subtype) |
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{ |
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if (!($className = $argument->getClass())) { |
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return false; |
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} |
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return is_a($className->name, $subtype, true); |
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} |
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} |
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fesor /
request-objects
