big update

1 files changed, 71 insertions, 0 deletions

diff --git a/src/Router.php b/src/Router.php
index efcccfa..f666fe5 100644
--- a/src/Router.php
+++ b/src/Router.php
@@ -4,6 +4,77 @@ declare(strict_types=1);
 
 namespace Lightscale\Router;
 
+use Lightscale\Router\Enums\HttpMethod;
+use Lightscale\Router\Enums\PathSegmentType;
+use Lightscale\Router\Exceptions\NotFoundException;
+use Lightscale\Router\Exceptions\UnknownMethodException;
+use Psr\Http\Message\RequestInterface;
+use Psr\Http\Message\ResponseInterface;
+
 class Router
 {
+    private PathSegment $root;
+
+    public function __construct()
+    {
+        $this->root = new PathSegment(type: PathSegmentType::Root);
+    }
+
+    public function root(): PathSegment
+    {
+        return $this->root;
+    }
+
+    /** @return string[] */
+    private function splitPath(string $path): array
+    {
+        $split = explode('/', rtrim($path, '/'));
+        array_shift($split);
+
+        return $split;
+    }
+
+    public function findSegment(string $path): ?PathSegmentMatch
+    {
+        $pathSplit = $this->splitPath($path);
+        $seg = $this->root();
+        $params = [];
+
+        while (($v = array_shift($pathSplit)) !== null && null !== $seg) {
+            $seg = $seg->findChild($v);
+
+            if (PathSegmentType::Parameter === $seg?->getType()) {
+                $params[$seg->getValue() ?? ''] = $v;
+            }
+        }
+
+        return null === $seg ? null : new PathSegmentMatch(
+            segment: $seg,
+            parameters: $params
+        );
+    }
+
+    public function dispatch(RequestInterface $request): ResponseInterface
+    {
+        $uri = $request->getUri();
+        $match = $this->findSegment($uri->getPath());
+
+        if (null === $match) {
+            throw new NotFoundException();
+        }
+
+        $segment = $match->segment;
+        $method = $request->getMethod();
+        $method = (
+            HttpMethod::tryFrom(strtolower($method)) ??
+            throw new UnknownMethodException()
+        );
+        $route = $segment->getRoute($method);
+
+        if (null === $route) {
+            throw new NotFoundException();
+        }
+
+        return $route($request);
+    }
 }