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<?php |
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namespace App\LazyRendering\Http; |
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use Generator; |
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use Psr\Container\ContainerInterface as Container; |
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use Psr\Http\Message\ResponseFactoryInterface as ResponseFactory; |
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use Psr\Http\Message\ResponseInterface as Response; |
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use Psr\Http\Message\ServerRequestInterface as Request; |
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use Psr\Http\Message\StreamFactoryInterface; |
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use Psr\Http\Server\MiddlewareInterface; |
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use Psr\Http\Server\RequestHandlerInterface; |
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use Throwable; |
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use Yiisoft\Http\Method; |
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use Yiisoft\Injector\Injector; |
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use Yiisoft\Router\UrlGeneratorInterface; |
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use Yiisoft\Widget\WidgetFactory; |
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abstract class BaseController implements MiddlewareInterface |
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{ |
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protected ResponseFactory $responseFactory; |
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protected Request $request; |
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protected UrlGeneratorInterface $urlGenerator; |
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/** @var null|mixed Layout definition with method render() */ |
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protected $pageLayout = null; |
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protected StreamFactoryInterface $streamFactory; |
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private Container $container; |
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/** |
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* baseController constructor. |
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* @param Container $container |
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* @param mixed[] $options |
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*/ |
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public function __construct(Container $container) |
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{ |
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$this->container = $container; |
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$this->responseFactory = $this->container->get(ResponseFactory::class); |
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$this->urlGenerator = $this->container->get(UrlGeneratorInterface::class); |
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$this->streamFactory = $this->container->get(StreamFactoryInterface::class); |
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WidgetFactory::initialize($container); |
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} |
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/** |
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* @param Request $request |
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* @param Response $response |
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* @param array $args |
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* @return Response |
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* @throws Throwable |
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*/ |
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public function process(Request $request, RequestHandlerInterface $handler): Response |
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{ |
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$this->flushAllOutputBuffers(); |
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return $this->handle($request) ?? $handler->handle($request); |
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} |
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public function handle(Request $request): ?Response |
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{ |
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$this->request = $request; |
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$actionMethod = $this->getActionMethod($request); |
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if ($actionMethod === null || !method_exists($this, $actionMethod)) { |
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return null; |
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} |
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$data = (new Injector($this->container))->invoke([$this, $actionMethod]); |
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$response = $data instanceof Response ? $data : $this->prepareResponse($data); |
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// Force Buffering (classic mode) |
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if (($this->request->getQueryParams()['forceBuffering'] ?? 0) === '1') { |
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// Buffering from generator |
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$content = $response->getBody()->getContents(); |
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$stream = $this->streamFactory->createStream($content); |
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return $response->withBody($stream); |
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} |
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if (($this->request->getQueryParams()['forceBuffering'] ?? 0) === '2') { |
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$stream = $response->getBody(); |
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if (!$stream instanceof GeneratorStream) { |
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throw new \Exception('Combined mode not supported'); |
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} |
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$stream->setReadMode(GeneratorStream::READ_MODE_FIRST_YIELD); |
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} |
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return $response; |
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} |
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protected function prepareResponse(iterable $page): Response |
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{ |
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if (!$page instanceof Generator) { |
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$page = (static function (iterable $iterable) { |
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yield from $iterable; |
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})($page); |
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} |
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// Add layout rendering |
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if ($this->pageLayout !== null) { |
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if (is_string($this->pageLayout)) { |
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$this->pageLayout = $this->container->get($this->pageLayout); |
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} elseif (!is_object($this->pageLayout) || !method_exists($this->pageLayout, 'render')) { |
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throw new \RuntimeException('Bad Layout definition'); |
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} |
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$page = (new Injector($this->container))->invoke([$this->pageLayout, 'render'], [$page, $this->request]); |
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} |
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$stream = new GeneratorStream($page); |
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return $this->responseFactory->createResponse()->withBody($stream); |
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} |
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private function flushAllOutputBuffers(): void |
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{ |
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for ($bufferingLevel = ob_get_level(), $i = 0; $i < $bufferingLevel; ++$i) { |
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ob_end_flush(); |
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} |
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} |
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private function getActionMethod(Request $request): ?string |
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{ |
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$method = strtoupper($request->getMethod()); |
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$page = $request->getAttribute('page', 'index'); |
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$action = |
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$request->getAttribute('action') ?? |
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$request->getParsedBody()['action'] ?? |
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$request->getQueryParams()['action'] ?? |
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null; |
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if ($action !== null || $method === Method::POST) { |
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$action = $action ?? $page; |
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return 'action' . str_replace(' ', '', ucwords($action)); |
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} |
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if ($method === Method::GET) { |
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return 'page' . str_replace(' ', '', ucwords($page)); |
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} |
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return null; |
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} |
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} |
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yiisoft /
yii-demo
