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<?php |
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/** |
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* This file is part of graze/gigya-client |
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* |
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* Copyright (c) 2016 Nature Delivered Ltd. <https://www.graze.com> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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* |
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* @license https://github.com/graze/gigya-client/blob/master/LICENSE.md |
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* @link https://github.com/graze/gigya-client |
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*/ |
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namespace Graze\Gigya\Validation; |
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use Closure; |
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use Graze\Gigya\Exception\InvalidTimestampException; |
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use Graze\Gigya\Exception\UnknownResponseException; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface as GuzzleResponseInterface; |
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class ValidGigyaResponseMiddleware |
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{ |
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/** |
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* @var string[] |
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*/ |
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private $requiredFields = [ |
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'errorCode', |
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'statusCode', |
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'statusReason', |
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'callId', |
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'time', |
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]; |
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/** |
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* @var callable |
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*/ |
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private $handler; |
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/** |
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* ValidGigyaResponseMiddleware constructor. |
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* |
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* @param callable $handler |
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*/ |
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public function __construct(callable $handler) |
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{ |
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$this->handler = $handler; |
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} |
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/** |
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* Return the handler to assert that the response returned is valid |
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* |
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* @param RequestInterface $request |
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* @param array $options |
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* |
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* @return Closure |
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*/ |
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public function __invoke(RequestInterface $request, array $options) |
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{ |
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$fn = $this->handler; |
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return $fn($request, $options) |
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->then( |
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function (GuzzleResponseInterface $response) { |
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$this->assert($response); |
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return $response; |
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} |
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); |
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} |
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/** |
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* @param GuzzleResponseInterface $response |
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* |
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* @throws InvalidTimestampException |
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* @throws UnknownResponseException |
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* |
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* @return void |
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*/ |
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private function assert(GuzzleResponseInterface $response) |
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{ |
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$data = json_decode($response->getBody(), true); |
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if (!is_array($data)) { |
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throw new UnknownResponseException($response, 'Could not decode the body'); |
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} |
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foreach ($this->requiredFields as $field) { |
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if (!array_key_exists($field, $data)) { |
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throw new UnknownResponseException($response, "Missing required field: '{$field}'"); |
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} |
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} |
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} |
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/** |
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* Returns a Middleware handler functions for this class |
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* |
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* @return Closure |
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*/ |
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public static function middleware() |
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{ |
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return function (callable $handler) { |
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return new static($handler); |
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}; |
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} |
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} |
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graze /
gigya-client
