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<?php
namespace Jasny\Auth;
use Jasny\Auth;
use Jasny\Authz;
use Psr\Http\Message\ServerRequestInterface;
use Psr\Http\Message\ResponseInterface;
/**
* Access control middleware
*/
class Middleware
{
/**
* @var Auth
**/
protected $auth;
/**
* Function to get the required role from the request.
* @var callable
*/
protected $getRequiredRole;
/**
* Class constructor
*
* @param Auth $auth
* @param callable $getRequiredRole
*/
public function __construct(Auth $auth, $getRequiredRole)
{
$this->auth = $auth;
if (!is_callable($getRequiredRole)) {
throw new \InvalidArgumentException("'getRequiredRole' should be callable");
}
$this->getRequiredRole = $getRequiredRole;
}
/**
* Check if the current user has one of the roles
*
* @param array|string|boolean $requiredRole
* @return
*/
protected function hasRole($requiredRole)
{
if (is_bool($requiredRole)) {
return $this->auth->user() !== null;
}
$ret = false;
if ($this->auth instanceof Authz) {
$roles = (array)$requiredRole;
foreach ($roles as $role) {
$ret = $ret || $this->auth->is($role);
}
}
return $ret;
}
/**
* Respond with forbidden (or unauthorized)
*
* @param ServerRequestInterface $request
* @param ResponseInterface $response
* @return ResponseInterface
*/
protected function forbidden(ServerRequestInterface $request, ResponseInterface $response)
{
$unauthorized = $this->auth->user() === null;
$forbiddenResponse = $response
->withProtocolVersion($request->getProtocolVersion())
->withStatus($unauthorized ? 401 : 403);
$forbiddenResponse->getBody()->write('Access denied');
return $forbiddenResponse;
}
/**
* Run middleware action
*
* @param ServerRequestInterface $request
* @param ResponseInterface $response
* @param callable $next
* @return ResponseInterface
*/
public function __invoke(ServerRequestInterface $request, ResponseInterface $response, $next)
{
if (!is_callable($next)) {
throw new \InvalidArgumentException("'next' should be callable");
}
$requiredRole = call_user_func($this->getRequiredRole, $request);
if (!empty($requiredRole) && !$this->hasRole($requiredRole)) {
return $this->forbidden($request, $response);
}
return $next($request, $response);
}
}
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