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<?php |
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namespace Simply\Router; |
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use Simply\Router\Exception\MethodNotAllowedException; |
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use Simply\Router\Exception\RouteNotFoundException; |
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/** |
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* Class for routing requested methods and paths to specific routes. |
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* @author Riikka Kalliomäki <[email protected]> |
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* @copyright Copyright (c) 2018 Riikka Kalliomäki |
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* @license http://opensource.org/licenses/mit-license.php MIT License |
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*/ |
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class Router |
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{ |
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/** @var RouteDefinitionProvider The route definition provider */ |
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private $provider; |
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/** @var string[] List of methods that would be allowed for the routed path */ |
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private $allowedMethods; |
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/** |
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* Router constructor. |
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* @param RouteDefinitionProvider $provider The route definition provider |
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*/ |
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public function __construct(RouteDefinitionProvider $provider) |
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{ |
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$this->provider = $provider; |
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$this->allowedMethods = []; |
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} |
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/** |
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* Routes the given path with the given HTTP request method to a specific route. |
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* @param string $method The HTTP request method |
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* @param string $path The decoded request path |
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* @return Route Matching route |
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* @throws MethodNotAllowedException If the path matches at least one route, but the method is not allowed |
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* @throws RouteNotFoundException If no route matches the given path |
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*/ |
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public function route(string $method, string $path): Route |
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{ |
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if (!HttpMethod::isValid($method)) { |
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throw new \InvalidArgumentException("Invalid HTTP method '$method'"); |
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} |
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$this->allowedMethods = []; |
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$segments = split_segments($path); |
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$routes = $this->matchRoutes($method, $segments); |
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if (\count($routes) === 1) { |
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return $routes[0]; |
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} |
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if (\count($routes) > 1) { |
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throw new \UnexpectedValueException("The given path '$path' matches more than one route"); |
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} |
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if (\count($this->allowedMethods) > 0) { |
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if (\in_array(HttpMethod::GET, $this->allowedMethods, true)) { |
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$this->allowedMethods[] = HttpMethod::HEAD; |
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} |
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throw new MethodNotAllowedException( |
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"The requested method '$method' is not within list of allowed methods", |
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array_unique($this->allowedMethods) |
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); |
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} |
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throw new RouteNotFoundException("The given path '$path' did not match any defined route"); |
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} |
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/** |
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* Returns routes that match the given HTTP request method and path segments. |
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* @param string $method The HTTP request method |
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* @param string[] $segments The requested path segments |
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* @return Route[] List of matching routes |
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*/ |
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private function matchRoutes(string $method, array $segments): array |
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{ |
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$staticIds = $this->provider->getRoutesByStaticPath(implode('/', $segments)); |
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if ($staticIds !== []) { |
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$routes = $this->getMatchingRoutes($staticIds, $method, $segments); |
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if ($routes !== []) { |
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return $routes; |
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} |
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} |
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$matchedIds = $this->getDynamicRouteIds($segments); |
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return $this->getMatchingRoutes($matchedIds, $method, $segments); |
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} |
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/** |
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* Returns a list of route ids for dynamic routes that have matching static path segments. |
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* @param string[] $segments The requested path segments |
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* @return int[] List of route ids for dynamic routes that have matching static path segments |
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*/ |
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private function getDynamicRouteIds(array $segments): array |
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{ |
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$matched = []; |
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$index = 0; |
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do { |
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$matched[] = |
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$this->provider->getRoutesBySegmentValue($index, $segments[$index]) + |
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$this->provider->getRoutesBySegmentValue($index, RouteDefinition::DYNAMIC_SEGMENT); |
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$index++; |
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} while (isset($segments[$index])); |
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$matched[] = $this->provider->getRoutesBySegmentCount(\count($segments)); |
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return array_values(array_intersect_key(... $matched)); |
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} |
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/** |
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* Returns the routes for the given ids that match the requested method and segments. |
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* @param int[] $ids List of route ids to match |
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* @param string $method The HTTP request method |
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* @param string[] $segments The requested path segments |
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* @return Route[] List of matching routes |
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*/ |
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private function getMatchingRoutes(array $ids, string $method, array $segments): array |
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{ |
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$routes = []; |
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foreach ($ids as $id) { |
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$definition = $this->provider->getRouteDefinition($id); |
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$values = []; |
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if (!$definition->matchPatterns($segments, $values)) { |
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continue; |
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} |
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if (!$definition->isMethodAllowed($method)) { |
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array_push($this->allowedMethods, ... $definition->getMethods()); |
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continue; |
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} |
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$routes[] = new Route($definition, $method, $segments, $values); |
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} |
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return $routes; |
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} |
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/** |
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* Returns the encoded URL for the route with the given name. |
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* @param string $name Name of the route |
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* @param string[] $parameters Values for the route parameters |
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* @return string The encoded URL for the route |
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*/ |
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public function generateUrl(string $name, array $parameters = []): string |
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{ |
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$definition = $this->provider->getRouteDefinitionByName($name); |
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return $definition->formatUrl($parameters); |
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} |
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} |
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simply-framework /
router
