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<?php |
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/** |
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* @copyright Copyright (c) Flipbox Digital Limited |
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* @license https://github.com/flipbox/relay-transform/blob/master/LICENSE |
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* @link https://github.com/flipbox/relay-transform |
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*/ |
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namespace Flipbox\Relay\Middleware\Transform; |
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use Flipbox\Http\Stream\Factory as StreamFactory; |
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use Flipbox\Relay\Middleware\AbstractMiddleware; |
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use Flipbox\Skeleton\Helpers\JsonHelper; |
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use Flipbox\Transform\Factory as TransformFactory; |
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use Flipbox\Transform\Helpers\Transformer as TransformerHelper; |
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use Flipbox\Transform\transformers\TransformerInterface; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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/** |
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* @author Flipbox Factory <[email protected]> |
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* @since 1.0.0 |
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*/ |
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class AbstractResource extends AbstractMiddleware |
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{ |
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/** |
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* @var mixed |
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*/ |
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public $data; |
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/** |
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* @var string|callable|TransformerInterface |
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*/ |
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public $transformer; |
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/** |
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* @var array |
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*/ |
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public $config = []; |
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/** |
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* @inheritdoc |
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*/ |
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public function __invoke( |
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RequestInterface $request, |
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ResponseInterface $response, |
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callable $next = null |
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) { |
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// Set transformed body contents |
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$request = $request->withBody( |
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StreamFactory::create( |
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JsonHelper::encode($this->transform()) |
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) |
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); |
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$response = $next($request, $response); |
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return $this->handleResponse($response); |
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} |
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/** |
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* @return array|null |
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*/ |
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protected function transform() |
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{ |
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return TransformFactory::item($this->config) |
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->transform( |
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$this->resolveTransformer(), |
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$this->data |
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); |
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} |
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/** |
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* @return callable|TransformerInterface |
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* @throws \Exception |
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*/ |
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protected function resolveTransformer() |
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{ |
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if (TransformerHelper::isTransformer($this->transformer)) { |
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return $this->transformer; |
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} |
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if (TransformerHelper::isTransformerClass($this->transformer)) { |
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return new $this->transformer(); |
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} |
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throw new \Exception("Invalid transformer"); |
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} |
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/** |
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* @param ResponseInterface $response |
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* @return ResponseInterface |
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*/ |
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protected function handleResponse(ResponseInterface $response) |
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{ |
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return $response; |
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} |
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} |
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