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<?php |
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namespace Staticus\Acl; |
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use Staticus\Auth\User; |
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use Staticus\Auth\UserInterface; |
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use Staticus\Config\ConfigInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Psr\Http\Message\ServerRequestInterface; |
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use Staticus\Diactoros\Response\ResourceDoResponse; |
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use Staticus\Exceptions\WrongRequestException; |
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use Staticus\Resources\Middlewares\PrepareResourceMiddlewareAbstract; |
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use Staticus\Resources\ResourceDOInterface; |
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use Zend\Diactoros\Response\EmptyResponse; |
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use Zend\Permissions\Acl\Resource\ResourceInterface; |
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use Zend\Stratigility\MiddlewareInterface; |
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class AclMiddleware implements MiddlewareInterface |
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{ |
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protected $config; |
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/** |
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* @var AclServiceInterface|AclService |
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*/ |
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protected $service; |
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/** |
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* @var UserInterface|User |
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*/ |
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protected $user; |
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public function __construct(ConfigInterface $config, AclServiceInterface $service, UserInterface $user) |
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{ |
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$this->config = $config->get('acl'); |
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$this->service = $service; |
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$this->user = $user; |
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} |
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public function __invoke( |
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ServerRequestInterface $request, |
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ResponseInterface $response, |
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callable $next = null |
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) |
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{ |
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/** @var $response ResourceDoResponse */ |
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$this->checkResponseOrDie($response); |
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$action = $this->getAction($request); |
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$resourceDO = $response->getContent(); |
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$resourceNamespace = $resourceDO->getNamespace(); |
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$userNamespace = $this->user->getNamespace(); |
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$AclResourceCommon = get_class($resourceDO); |
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$AclResourceUnique = $resourceDO instanceof ResourceInterface |
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? $resourceDO->getResourceId() |
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: null; |
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if ( |
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// User have access to this type of resources regardless namespaces |
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$this->isAllowedForUser($AclResourceCommon, $action, '') |
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// User have access to this unique resource regardless namespaces |
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|| $this->isAllowedForUser($AclResourceUnique, $action, '') |
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// User have access to this resource type in common namespace |
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|| ( |
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!$resourceNamespace |
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&& $this->isAllowedForUser($AclResourceCommon, $action, ResourceDOInterface::NAMESPACES_WILDCARD) |
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) |
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// User have access to this resource type in concrete selected namespace |
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|| ( |
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$resourceNamespace |
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&& $this->isAllowedForUser($AclResourceCommon, $action, $resourceNamespace) |
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) |
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|| ( |
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// This is a user home namespace |
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$resourceNamespace === $userNamespace |
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// User have access to the current action in his own namespace |
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&& $this->isAllowedForUser($AclResourceCommon, $action, UserInterface::NAMESPACES_WILDCARD) |
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) |
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|| ( |
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// This is an another user namespace |
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$resourceNamespace !== $userNamespace |
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&& 0 === strpos($resourceNamespace, UserInterface::NAMESPACES) |
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// User have access to the current action in his own namespace |
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&& $this->isAllowedForGuest($AclResourceCommon, $action, UserInterface::NAMESPACES_WILDCARD) |
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) |
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) { |
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return $next($request, $response); |
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} |
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return new EmptyResponse(403); |
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} |
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/** |
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* @param ResponseInterface $response |
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*/ |
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protected function checkResponseOrDie(ResponseInterface $response) |
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{ |
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if (!$this->isSupportedResponse($response)) { |
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// something like PrepareResourceMiddleware should be called before this |
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throw new WrongRequestException( |
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'Unsupported type of the response for ACL. Resource preparing layer must be called before this.'); |
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} |
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} |
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/** |
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* @param ResponseInterface $response |
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* @return bool |
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*/ |
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protected function isSupportedResponse(ResponseInterface $response) |
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{ |
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return $response instanceof ResourceDoResponse; |
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} |
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/** |
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* @param ServerRequestInterface $request |
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* @return string |
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*/ |
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protected function getAction(ServerRequestInterface $request) |
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{ |
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if (PrepareResourceMiddlewareAbstract::getParamFromRequest(Actions::ACTION_SEARCH, $request)) { |
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return Actions::ACTION_SEARCH; |
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} |
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if (PrepareResourceMiddlewareAbstract::getParamFromRequest(Actions::ACTION_LIST, $request)) { |
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return Actions::ACTION_LIST; |
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} |
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$method = $request->getMethod(); |
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switch ($method) { |
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case 'GET': |
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$action = Actions::ACTION_READ; |
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break; |
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case 'POST': |
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$action = Actions::ACTION_WRITE; |
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break; |
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case 'DELETE': |
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$action = Actions::ACTION_DELETE; |
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break; |
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default: |
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throw new WrongRequestException('Unknown access control action'); |
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} |
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return $action; |
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} |
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protected function isAllowedForUser($aclResource, $action, $namespace = '') |
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{ |
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if (!$this->service->acl()->hasResource($namespace . $aclResource)) { |
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return false; |
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} |
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return $this->user->can($namespace . $aclResource, $action); |
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} |
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protected function isAllowedForGuest($aclResource, $action, $namespace = '') |
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{ |
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if (!$aclResource || !$this->service->acl()->hasResource($namespace . $aclResource)) { |
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return false; |
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} |
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return $this->service->acl()->isAllowed(Roles::GUEST, $namespace . $aclResource, $action); |
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} |
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} |
KIVagant /
staticus-core
