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<?php |
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namespace Controlabs\Handler\Slim; |
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use Controlabs\Http\Exception\Unauthorized; |
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use Slim\Http\Request; |
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use Slim\Http\Response; |
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use Controlabs\Helper\JWT as JWTHelper; |
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class Authentication |
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{ |
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private $jwtHelper; |
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private $public; |
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public function __construct(JWTHelper $jwtHelper, array $public = []) |
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{ |
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$this->jwtHelper = $jwtHelper; |
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$this->public = $public; |
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} |
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public function __invoke(Request $request, Response $response, $next) |
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{ |
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try { |
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$token = $this->token($request); |
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$payload = $this->decodeToken($token); |
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unset($payload['iss']); |
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unset($payload['aud']); |
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unset($payload['sub']); |
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unset($payload['exp']); |
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$request = $request->withAttributes($payload); |
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} catch (Unauthorized $exception) { |
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$this->handleException($request, $exception); |
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} |
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return $next($request, $response); |
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} |
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protected function token(Request $request) |
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{ |
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$token = $request->getHeader('Authorization')[0] ?? null; |
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if (!$token) { |
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throw new Unauthorized(); |
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} |
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return $token; |
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} |
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protected function decodeToken($token) |
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{ |
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$payload = $this->jwtHelper->decode($token, true); |
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if (!$payload) { |
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throw new Unauthorized(); |
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} |
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return $payload; |
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} |
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protected function handleException(Request $request, Unauthorized $unauthorized) |
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{ |
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if (!$this->isPublic($request)) { |
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throw $unauthorized; |
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} |
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} |
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protected function isPublic(Request $request) |
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{ |
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$route = $this->route($request); |
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$patterns = $this->getPublicRoutesByMethod($request->getMethod()); |
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foreach ($patterns as $pattern) { |
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if ($this->match($pattern, $route)) { |
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return true; |
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} |
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} |
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return false; |
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} |
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protected function route(Request $request) |
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{ |
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$route = $request->getAttribute('route'); |
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if (!$route) { |
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return ''; |
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} |
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return $route->getPattern(); |
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} |
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protected function getPublicRoutesByMethod($method) |
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{ |
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/* |
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* 0 - Method |
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* 1 - Pattern |
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*/ |
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$map = function (array $public) use ($method) { |
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return $this->match($public[0], $method) ? $public[1] : ''; |
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}; |
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$patterns = array_map($map, $this->public); |
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$patterns = array_filter($patterns); |
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$patterns = array_values($patterns); |
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return $patterns; |
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} |
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protected function match($pattern, $str) |
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{ |
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$pattern = str_replace("/", "\/", $pattern); |
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$pattern = "/{$pattern}/"; |
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try { |
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return !!preg_match($pattern, $str); |
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} catch (\Exception $exception) { |
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throw new \Exception('Invalid RegExp: ' . $pattern, 0, $exception); |
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} |
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} |
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} |
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controlabs /
slim-handlers
