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<?php /** @noinspection PhpIncludeInspection */ |
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declare(strict_types=1); |
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namespace Tebe\Pvc\Middleware; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Tebe\HttpFactory\HttpFactory; |
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use Tebe\Pvc\Controller\BaseController; |
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use Tebe\Pvc\Controller\ErrorController; |
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use Tebe\Pvc\Exception\HttpException; |
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use Tebe\Pvc\Exception\SystemException; |
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use Tebe\Pvc\Helper\RequestHelper; |
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use Tebe\Pvc\View\View; |
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class RequestHandler implements RequestHandlerInterface |
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{ |
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/** |
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* @var View |
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*/ |
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private $view; |
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/** |
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* @var ServerRequestInterface |
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*/ |
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private $request; |
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/** |
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* @var string |
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*/ |
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private $controllersPath; |
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/** |
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* RouterMiddleware constructor. |
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* @param View $view |
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* @param string $controllersPath |
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* @throws SystemException |
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*/ |
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public function __construct(View $view, string $controllersPath) |
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{ |
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$this->setView($view); |
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$this->setControllersPath($controllersPath); |
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} |
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/** |
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* Handle the request and return a response. |
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* @param ServerRequestInterface $request |
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* @return ResponseInterface |
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* @throws HttpException |
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* @throws SystemException |
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*/ |
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public function handle(ServerRequestInterface $request): ResponseInterface |
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{ |
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$this->request = $request; |
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$response = (new HttpFactory())->createResponse(); |
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$response = $response->withHeader('Content-Type', 'text/html'); |
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$pathInfo = RequestHelper::getPathInfo($request); |
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try { |
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$controller = $this->resolveController($pathInfo); |
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$mixed = $this->executeAction($controller); |
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} catch (\Throwable $t) { |
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// handle errors with built-in error controller |
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$controller = new ErrorController($this->view, $request, 'error/error'); |
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$controller->setError($t); |
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$mixed = $this->executeAction($controller); |
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$response = $response->withStatus($t->getCode()); |
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} |
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if (is_array($mixed)) { |
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$response = $response->withHeader('Content-Type', 'application/json'); |
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$response->getBody()->write(json_encode($mixed)); |
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} elseif (is_string($mixed)) { |
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$response->getBody()->write($mixed); |
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} else { |
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throw new \Exception('Unsupported content type'); |
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} |
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return $response; |
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} |
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/** |
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* @param string $pathInfo |
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* @return BaseController |
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* @throws HttpException |
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*/ |
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private function resolveController(string $pathInfo): BaseController |
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{ |
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[$controllerName] = explode('/', $pathInfo); |
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$controllerPath = sprintf('%s/%sController.php', $this->controllersPath, ucfirst($controllerName)); |
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if (!is_file($controllerPath)) { |
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throw HttpException::notFound($pathInfo); |
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} |
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require_once($controllerPath); |
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// this seems to work... |
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$declaredClasses = get_declared_classes(); |
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$controllerClass = array_pop($declaredClasses); |
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$controller = new $controllerClass($this->view, $this->request, $pathInfo); |
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return $controller; |
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} |
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/** |
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* @param BaseController $controller |
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* @return mixed |
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* @throws HttpException |
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* @throws SystemException |
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*/ |
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private function executeAction(BaseController $controller) |
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{ |
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$actionMethod = $controller->getActionMethod(); |
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if (!method_exists($controller, $actionMethod)) { |
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// throw not found error (404) |
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throw HttpException::notFound($controller->getRoute()); |
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} |
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$httpMethod = $this->request->getMethod(); |
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if (!$this->testForHttpMethod($controller, $httpMethod)) { |
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// throw not found error (404) |
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$allowedHttpMethods = $controller->getAllowedHttpMethods(); |
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throw HttpException::methodNotAllowed($controller->getRoute(), $httpMethod, $allowedHttpMethods); |
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} |
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try { |
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$queryParams = $this->getHttpGetVars($controller, $actionMethod); |
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$html = call_user_func_array([$controller, $actionMethod], $queryParams); |
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} catch (\Throwable $t) { |
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// catch all errors that happen within action handler |
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throw SystemException::serverError($t->getMessage(), $t); |
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} |
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return $html; |
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} |
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/** |
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* Get the HTTP GET vars which are requested by the method using method parameters (a kind of injecting the get |
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* vars into the action method name). |
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* @param BaseController $controller |
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* @param string $methodName |
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* @return array |
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* @throws \ReflectionException |
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*/ |
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private function getHttpGetVars(BaseController $controller, string $methodName): array |
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{ |
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$requestParams = []; |
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$reflectionMethod = new \ReflectionMethod($controller, $methodName); |
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$reflectionParameters = $reflectionMethod->getParameters(); |
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foreach ($reflectionParameters as $reflectionParameter) { |
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$name = $reflectionParameter->getName(); |
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$queryParams = $this->request->getQueryParams(); |
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if (isset($queryParams[$name])) { |
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$requestParams[$name] = $queryParams[$name]; |
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} |
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} |
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return $requestParams; |
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} |
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/** |
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* @param BaseController $controller |
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* @param string $httpMethod |
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* @return bool |
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*/ |
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private function testForHttpMethod(BaseController $controller, string $httpMethod) |
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{ |
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$httpMethod = strtoupper($httpMethod); |
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if ($controller->getControllerName() == 'error') { |
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return true; |
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} |
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$allowedHttpMethods = $controller->getAllowedHttpMethods(); |
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if (in_array($httpMethod, $allowedHttpMethods)) { |
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return true; |
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} |
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return false; |
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} |
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/** |
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* @param View $view |
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*/ |
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private function setView(View $view) |
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{ |
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$this->view = $view; |
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} |
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/** |
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* @param string $controllersPath |
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* @throws SystemException |
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*/ |
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private function setControllersPath(string $controllersPath) |
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{ |
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if (!is_dir($controllersPath)) { |
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throw SystemException::directoryNotExist($controllersPath); |
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} |
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$this->controllersPath = $controllersPath; |
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} |
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} |
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tbreuss /
pvc
