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<?php |
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namespace alkemann\h2l; |
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use alkemann\h2l\exceptions\InvalidUrl; |
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use alkemann\h2l\exceptions\NoRouteSetError; |
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use alkemann\h2l\util\Chain; |
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/** |
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* @package alkemann\h2l |
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*/ |
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class Dispatch |
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{ |
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/** |
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* @var array<callable> |
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*/ |
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private array $middlewares = []; |
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/** |
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* @var Request |
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*/ |
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protected Request $request; |
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/** |
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* Analyze request, provided $_REQUEST, $_SERVER [, $_GET, $_POST] to identify Route |
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* |
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* Response type can be set from HTTP_ACCEPT header |
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* Call setRoute or setRouteFromRouter to set a route |
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* |
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* @param array<string, mixed> $request $_REQUEST |
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* @param array<string, mixed> $server $_SERVER |
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* @param array<string, mixed> $get $_GET |
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* @param array<string, mixed> $post $_POST |
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* @param null|interfaces\Session $session if null, a default Session with $_SESSION will be created |
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*/ |
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public function __construct( |
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array $request = [], |
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array $server = [], |
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array $get = [], |
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array $post = [], |
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interfaces\Session $session = null |
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) { |
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unset($get['url']); // @TODO Use a less important keyword, as it blocks that _GET param? |
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if (is_null($session)) { |
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$session = new Session(); |
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} |
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$request = (new Request()) |
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->withRequestParams($request) |
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->withServerParams($server) |
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->withGetData($get) |
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->withPostData($post) |
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->withSession($session) |
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; |
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$body = file_get_contents('php://input'); |
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if (is_string($body)) { |
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// @TODO Always do this? Can we know from $_SERVER or $_REQUEST ? |
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$request = $request->withBody($body); |
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} |
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$this->request = $request; |
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} |
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/** |
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* Tries to identify route by configured static, dynamic or fallback configurations. |
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* |
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* First a string match on url is attempted, then fallback to see if Page is configured |
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* with a 'content_path'. Then checks if Router has a fallback callback configured. |
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* Return false if all 3 fails to set a route. |
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* |
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* @param string $router class name to use for Router matching |
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* @return bool true if a route is set on the Request |
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*/ |
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public function setRouteFromRouter(string $router = Router::class): bool |
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{ |
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/** |
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* matching dynamic or static routes |
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* @var Router $router |
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*/ |
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$matched = $router::match($this->request->url(), $this->request->method()); |
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if ($matched) { |
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$this->request = $this->request->withRoute($matched); |
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return true; |
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} |
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// If content path is configured, enable automatic Page responses |
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if (Environment::get('content_path')) { |
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$route = Router::getPageRoute($this->request->url()); |
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$this->request = $this->request->withRoute($route); |
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return true; |
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} |
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$fallback = $router::getFallback(); |
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if ($fallback) { |
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$this->request = $this->request->withRoute($fallback); |
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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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* @return interfaces\Route|null Route identified for request if set |
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*/ |
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public function route(): ?interfaces\Route |
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{ |
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return $this->request->route(); |
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} |
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/** |
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* Recreates the `Request` with the specified `Route`. `Request` may be created as side effect. |
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* |
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* @param interfaces\Route $route |
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*/ |
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public function setRoute(interfaces\Route $route): void |
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{ |
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$this->request = $this->request->withRoute($route); |
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} |
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/** |
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* Execute the Route's callback and return the Response object that the callback is required to return |
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* |
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* Catches InvalidUrl exceptions and returns a response\Error with 404 instead |
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* |
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* @return Response|null |
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* @throws NoRouteSetError if a route has not been set prior to calling this, or by a middleware |
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*/ |
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public function response(): ?Response |
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{ |
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$cbs = $this->middlewares; |
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$call_eventual_route_at_end_of_chain = static function(Request $request): ?Response { |
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$route = $request->route(); |
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if (is_null($route)) { |
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if (Environment::get('debug')) { |
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throw new NoRouteSetError("Response called without Route set"); |
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} |
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return null; |
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} |
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try { |
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return $route($request); |
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} catch (InvalidUrl $e) { |
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// @TODO Backwards breaking, but remove this? |
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return new response\Error( |
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['message' => $e->getMessage()], |
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['code' => 404, 'request' => $request] |
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); |
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} |
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}; |
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array_push($cbs, $call_eventual_route_at_end_of_chain); |
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$response = (new Chain($cbs))->next($this->request); |
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return ($response instanceof Response) ? $response : null; |
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} |
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/** |
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* Add a closure to wrap the Route callback in to be called during Request::response |
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* |
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* @param callable ...$cbs |
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*/ |
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public function registerMiddle(callable ...$cbs): void |
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{ |
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foreach ($cbs as $cb) { |
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$this->middlewares[] = $cb; |
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} |
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} |
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} |
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alkemann /
h2l
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