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<?php
declare(strict_types=1);
namespace Lightscale\Router;
use Lightscale\Router\Contracts\Strategy;
use Lightscale\Router\Enums\HttpMethod;
use Lightscale\Router\Enums\PathSegmentType;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
class Router
{
use Concerns\CreatesRoutes;
use Concerns\CreatesGroups;
private PathSegment $root;
private Strategy $strategy;
/** @var array<string, Route> */
private array $namedRoutes = [];
public function __construct()
{
$this->root = new PathSegment(type: PathSegmentType::Root);
$this->strategy = new BasicStrategy();
}
private function getRouter(): self
{
return $this;
}
private function getGroup(): null
{
return null;
}
public function getStrategy(): Strategy
{
return $this->strategy;
}
public function setStrategy(Strategy $strategy): void
{
$this->strategy = $strategy;
}
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 findRoute(HttpMethod|string $method, string $path): ?RouteMatch
{
$match = $this->findSegment($path);
if (null === $match) {
return null;
}
$method = (
$method instanceof HttpMethod ?
$method :
HttpMethod::tryFrom(strtolower($method))
);
if (null === $method) {
return null;
}
$segment = $match->segment;
$route = $segment->getRoute($method);
$route ??= $segment->getRoute(HttpMethod::Any);
if (null === $route) {
return null;
}
return new RouteMatch(
$match,
$route,
);
}
public function dispatch(RequestInterface $request): ResponseInterface
{
$uri = $request->getUri();
$match = $this->findRoute($request->getMethod(), $uri->getPath());
if (null === $match) {
return $this->strategy->notFound($request);
}
$call = new RouteCall(
$request,
$match->route,
$match->segmentMatch->parameters,
);
return $this->strategy->runRoute($call);
}
public function make(
HttpMethod $method,
string $path,
callable $handler,
): RouteDefinition {
$pathSplit = $this->splitPath($path);
$seg = $this->root();
while (($v = array_shift($pathSplit)) !== null) {
$typeMatch = PathSegmentType::matchRouteString($v);
$seg = $seg->child($typeMatch->value, $typeMatch->type);
}
$route = new Route($method, $handler);
$seg->addRoute($route);
return new RouteDefinition($this, $route);
}
public function addNamedRoute(string $name, Route $route): void
{
$this->namedRoutes[$name] = $route;
}
public function getNamedRoute(string $name): ?Route
{
return $this->namedRoutes[$name] ?? null;
}
/** @param array<string, mixed> $params */
public function route(string $name, array $params = []): ?string
{
$route = $this->getNamedRoute($name);
$params = $this->strategy->parseParameters($params);
return $route?->getPath($params);
}
}
|
