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<?php
namespace Jasny\Router\Runner;
use Jasny\Router\Runner;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;
/**
* Run a route using a controller
*/
class Controller extends Runner
{
/**
* Return with a 404 not found response
*
* @param ServerRequestInterface $request
* @param ResponseInterface $response
* @return ResponseInterface
*/
protected function notFound(ServerRequestInterface $request, ResponseInterface $response)
{
$finalResponse = $response
->withProtocolVersion($request->getProtocolVersion())
->withStatus(404)
->withHeader('Content-Type', 'text/plain');
$finalResponse->getBody()->write("Not found");
return $finalResponse;
}
/**
* Assert that a class exists and will provide a callable object
*
* @return type
*/
protected function validateClass($class)
{
if (!preg_match('/^([a-zA-Z_]\w*\\\\)*[a-zA-Z_]\w*$/', $class)) {
trigger_error("Can't route to controller '$class': invalid classname", E_USER_NOTICE);
return false;
}
if (!class_exists($class)) {
trigger_error("Can't route to controller '$class': class not exists", E_USER_NOTICE);
return false;
}
$refl = new \ReflectionClass($class);
$realClass = $refl->getName();
if ($realClass !== $class) {
trigger_error("Can't route to controller '$class': case mismatch with '$realClass'", E_USER_NOTICE);
return false;
}
if (!$refl->hasMethod('__invoke')) {
trigger_error("Can't route to controller '$class': class does not have '__invoke' method", E_USER_NOTICE);
return false;
}
return true;
}
/**
* Turn kabab-case into StudlyCase.
*
* @internal Jasny\studlycase isn't used because it's to tolerent, which might lead to security issues.
*
* @param string $string
* @return string
*/
protected function studlyCase($string)
{
return preg_replace_callback('/(?:^|(\w)-)(\w)/', function($match) {
return $match[1] . strtoupper($match[2]);
}, strtolower(addcslashes($string, '\\')));
}
/**
* Get class name from controller name
*
* @param string|array $name
* @return string
*/
protected function getClass($name)
{
return join('\\', array_map([$this, 'studlyCase'], (array)$name)) . 'Controller';
}
/**
* Instantiate a controller object
* @codeCoverageIgnore
*
* @param string $class
* @return callable|object
*/
protected function instantiate($class)
{
return new $class();
}
/**
* Route to a controller
*
* @param ServerRequestInterface $request
* @param ResponseInterface $response
* @return ResponseInterface|mixed
*/
public function run(ServerRequestInterface $request, ResponseInterface $response)
{
$route = $request->getAttribute('route');
$name = !empty($route->controller) ? $route->controller : null;
$class = $this->getClass($name);
if (!$this->validateClass($class)) {
return $this->notFound($request, $response);
}
$controller = $this->instantiate($class);
return $controller($request, $response);
}
}
|
