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<?php
namespace Jasny;
use Jasny\Router\Routes;
use Jasny\Router\RunnerFactory;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;
/**
* Route pretty URLs to correct controller
*/
class Router
{
/**
* Specific routes
* @var Routes
*/
protected $routes;
/**
* Middlewares actions
* @var array
**/
protected $middlewares = [];
/**
* Factory of Runner objects
* @var RunnerFactory
**/
protected $factory;
/**
* Class constructor
*
* @param Routes $routes
*/
public function __construct(Routes $routes)
{
$this->routes = $routes;
}
/**
* Get a all routes
*
* @return Routes
*/
public function getRoutes()
{
return $this->routes;
}
/**
* Get all middlewares
*
* @return array
*/
public function getMiddlewares()
{
return $this->middlewares;
}
/**
* Get factory of Runner objects
*
* @return RunnerFactory
*/
public function getFactory()
{
if (!isset($this->factory)) {
$this->factory = new RunnerFactory();
}
return $this->factory;
}
/**
* Set the factory of Runner objects
*
* @param callable $factory
* @return Router $this
*/
public function setFactory($factory)
{
if (!is_callable($factory)) {
throw new \InvalidArgumentException("Factory must be a callable");
}
$this->factory = $factory;
return $this;
}
/**
* Add middleware call to router.
*
* @param string $path Middleware is only applied for this path (including subdirectories), may be omitted
* @param callable $middleware
* @return Router $this
*/
public function add($path, $middleware = null)
{
if (!isset($middleware)) {
$middleware = $path;
$path = null;
}
if (!empty($path) && !ctype_digit($path) && $path[0] !== '/') {
trigger_error("Middleware path '$path' doesn't start with a '/'", E_USER_NOTICE);
}
if (!is_callable($middleware)) {
throw new \InvalidArgumentException("Middleware should be callable");
}
if (!empty($path)) {
$middleware = $this->wrapMiddleware($path, $middleware);
}
$this->middlewares[] = $middleware;
return $this;
}
/**
* Wrap middleware, so it's only applied to a specified path
*
* @param string $path
* @param callable $middleware
* @return callable
*/
protected function wrapMiddleware($path, $middleware)
{
return function(
ServerRequestInterface $request,
ResponseInterface $response,
$next
) use ($middleware, $path) {
$uriPath = $request->getUri()->getPath();
if ($uriPath === $path || strpos($uriPath, rtrim($path, '/') . '/') === 0) {
$ret = $middleware($request, $response, $next);
} else {
$ret = $next($request, $response);
}
return $ret;
};
}
/**
* Run the action for the request
*
* @param ServerRequestInterface $request
* @param ResponseInterface $response
* @return ResponseInterface
*/
final public function handle(ServerRequestInterface $request, ResponseInterface $response)
{
return $this->__invoke($request, $response);
}
/**
* Run the action for the request (optionally as middleware), previously running middlewares, if any
*
* @param ServerRequestInterface $request
* @param ResponseInterface $response
* @param callback $next
* @return ResponseInterface
*/
public function __invoke(ServerRequestInterface $request, ResponseInterface $response, $next = null)
{
if (empty($this->middlewares)) {
return $this->run($request, $response, $next);
}
$stack = array_reverse(array_merge($this->middlewares, [[$this, 'run']]));
// Turn the stack into a call chain
foreach ($stack as $handle) {
$next = function(ServerRequestInterface $request, ResponseInterface $response) use ($handle, $next) {
return $handle($request, $response, $next);
};
}
return $next($request, $response);
}
/**
* Run the action
*
* @param ServerRequestInterface $request
* @param ResponseInterface $response
* @param callback $next
* @return ResponseInterface
*/
public function run(ServerRequestInterface $request, ResponseInterface $response, $next = null)
{
$route = $this->routes->getRoute($request);
if (!$route) {
return $this->notFound($request, $response);
}
$requestWithRoute = $request->withAttribute('route', $route);
$factory = $this->getFactory();
$runner = $factory($route);
return $runner($requestWithRoute, $response, $next);
}
/**
* Return 'Not Found' response
*
* @param ServerRequestInterface $request
* @param ResponseInterface $response
* @return ResponseInterface
*/
protected function notFound(ServerRequestInterface $request, ResponseInterface $response)
{
$notFound = $response->withStatus(404);
$notFound->getBody()->write('Not Found');
return $notFound;
}
}
|
