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<?php |
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declare(strict_types=1); |
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namespace Selami\Router; |
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use FastRoute; |
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use RuntimeException; |
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class Dispatcher |
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{ |
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/** |
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* Routes array to be registered. |
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* Some routes may have aliases to be used in templating system |
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* Route item can be defined using array key as an alias key. |
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* Each route item is an array has items respectively: Request Method, Request Uri, Controller/Action, Return Type. |
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* |
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* @var array |
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*/ |
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private $routes; |
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/** |
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* Default return type if not noted in the $routes |
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* |
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* @var int |
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*/ |
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private $defaultReturnType; |
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/** |
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* @var null|string |
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*/ |
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private $cachedFile; |
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/** |
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* @var array |
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*/ |
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private $routerClosures = []; |
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private static $dispatchResults = [ |
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FastRoute\Dispatcher::METHOD_NOT_ALLOWED => 405, |
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FastRoute\Dispatcher::FOUND => 200 , |
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FastRoute\Dispatcher::NOT_FOUND => 404 |
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]; |
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public function __construct(array $routes, int $defaultReturnType, ?string $cachedFile) |
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{ |
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$this->routes = $routes; |
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$this->defaultReturnType = $defaultReturnType; |
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$this->cachedFile = $cachedFile; |
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} |
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/* |
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* Dispatch against the provided HTTP method verb and URI. |
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*/ |
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public function dispatcher() : FastRoute\Dispatcher |
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{ |
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$this->setRouteClosures(); |
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if ($this->cachedFile !== null && file_exists($this->cachedFile)) { |
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return $this->cachedDispatcher(); |
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} |
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/** |
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* @var \FastRoute\RouteCollector $routeCollector |
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*/ |
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$routeCollector = new FastRoute\RouteCollector( |
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new FastRoute\RouteParser\Std, |
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new FastRoute\DataGenerator\GroupCountBased |
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); |
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$this->addRoutes($routeCollector); |
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$this->createCachedRoute($routeCollector); |
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return new FastRoute\Dispatcher\GroupCountBased($routeCollector->getData()); |
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} |
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private function createCachedRoute($routeCollector) : void |
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{ |
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if ($this->cachedFile !== null && !file_exists($this->cachedFile)) { |
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/** |
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* @var FastRoute\RouteCollector $routeCollector |
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*/ |
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$dispatchData = $routeCollector->getData(); |
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file_put_contents($this->cachedFile, '<?php return ' . var_export($dispatchData, true) . ';'); |
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} |
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} |
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private function cachedDispatcher() : FastRoute\Dispatcher\GroupCountBased |
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{ |
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$dispatchData = include $this->cachedFile; |
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if (!is_array($dispatchData)) { |
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throw new RuntimeException('Invalid cache file "' . $this->cachedFile . '"'); |
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} |
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return new FastRoute\Dispatcher\GroupCountBased($dispatchData); |
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} |
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/* |
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* Define Closures for all routes that returns controller info to be used. |
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*/ |
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private function addRoutes(FastRoute\RouteCollector $route) : void |
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{ |
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$routeIndex=0; |
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foreach ($this->routes as $definedRoute) { |
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$definedRoute[3] = $definedRoute[3] ?? $this->defaultReturnType; |
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$routeName = 'routeClosure'.$routeIndex; |
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$route->addRoute(strtoupper($definedRoute[0]), $definedRoute[1], $routeName); |
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$routeIndex++; |
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} |
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} |
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private function setRouteClosures() : void |
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{ |
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$routeIndex=0; |
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foreach ($this->routes as $definedRoute) { |
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$definedRoute[3] = $definedRoute[3] ?? $this->defaultReturnType; |
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$routeName = 'routeClosure'.$routeIndex; |
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$this->routerClosures[$routeName]= function ($uriArguments) use ($definedRoute) { |
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$returnType = ($definedRoute[3] >=1 && $definedRoute[3] <=7) ? $definedRoute[3] |
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: $this->defaultReturnType; |
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return [ |
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'status' => 200, |
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'requestMethod' => $definedRoute[0], |
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'controller' => $definedRoute[2], |
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'returnType' => $returnType, |
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'pattern' => $definedRoute[1], |
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'uriArguments'=> $uriArguments |
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]; |
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}; |
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$routeIndex++; |
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} |
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} |
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public function runDispatcher(array $routeInfo) : Route |
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{ |
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return $this->getRouteData($routeInfo) |
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->withStatusCode(self::$dispatchResults[$routeInfo[0]]); |
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} |
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private function getRouteData(array $routeInfo) : Route |
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{ |
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if ($routeInfo[0] === FastRoute\Dispatcher::FOUND) { |
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[$dispatcher, $handler, $vars] = $routeInfo; |
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$routeParameters = $this->routerClosures[$handler]($vars); |
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return new Route( |
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$routeParameters['requestMethod'], |
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$routeParameters['pattern'], |
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$routeParameters['status'], |
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$routeParameters['returnType'], |
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$routeParameters['controller'], |
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$routeParameters['uriArguments'] |
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); |
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} |
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return new Route('GET', '/', 200, 1, 'main', []); |
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} |
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} |
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selamiphp /
router
