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<?php |
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declare(strict_types=1); |
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namespace Northwoods\Broker; |
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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\Server\MiddlewareInterface as Middleware; |
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use Psr\Http\Server\RequestHandlerInterface as Handler; |
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class PathDispatcher implements Middleware |
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{ |
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/** @var array */ |
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private $middlewares; |
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/** @var MiddlewareResolver */ |
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private $resolver; |
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public function __construct(array $middlewares, MiddlewareResolver $resolver) |
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{ |
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$this->middlewares = $middlewares; |
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$this->resolver = $resolver; |
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// Make sure the longest path prefixes are matched first |
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// (otherwise, a path /foo would always match, even when /foo/bar |
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// should match). |
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krsort($this->middlewares); |
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} |
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public function process(Request $request, Handler $handler): Response |
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{ |
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$requestPath = $this->getNormalizedPath($request); |
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foreach ($this->middlewares as $pathPrefix => $middleware) { |
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if (strpos($requestPath, $pathPrefix) === 0) { |
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return $this->resolver->resolve($middleware) |
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->process( |
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$this->unprefixedRequest($request, $pathPrefix), |
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$this->prefixedHandler($handler, $pathPrefix) |
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); |
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} |
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} |
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return $handler->handle($request); |
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} |
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private function unprefixedRequest(Request $request, $prefix): Request |
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{ |
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$uri = $request->getUri(); |
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return $request->withUri( |
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$uri->withPath( |
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substr($uri->getPath(), strlen($prefix)) |
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) |
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); |
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} |
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private function prefixedHandler(Handler $handler, $prefix): Handler |
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{ |
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return new PathPrefixingHandler($handler, $prefix); |
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} |
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private function getNormalizedPath(Request $request): string |
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{ |
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$path = $request->getUri()->getPath(); |
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if (empty($path)) { |
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$path = '/'; |
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} |
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return $path; |
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} |
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} |
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northwoods /
broker
