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<?php |
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namespace Http\Adapter\React; |
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use React\EventLoop\LoopInterface; |
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use React\Promise\PromiseInterface as ReactPromise; |
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use Http\Client\Exception; |
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use Http\Promise\Promise as HttpPromise; |
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use Psr\Http\Message\ResponseInterface; |
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/** |
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* React promise adapter implementation. |
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* |
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* @author Stéphane Hulard <[email protected]> |
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*/ |
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class Promise implements HttpPromise |
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{ |
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/** |
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* Promise status. |
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* |
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* @var string |
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*/ |
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private $state = HttpPromise::PENDING; |
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/** |
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* Adapted React promise. |
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* |
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* @var ReactPromise |
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*/ |
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private $promise; |
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/** |
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* PSR7 received response. |
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* |
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* @var ResponseInterface |
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*/ |
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private $response; |
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/** |
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* Execution error. |
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* |
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* @var Exception |
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*/ |
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private $exception; |
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/** |
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* React Event Loop used for synchronous processing. |
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* |
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* @var LoopInterface |
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*/ |
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private $loop; |
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/** |
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* Initialize the promise. |
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* |
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* @param ReactPromise $promise |
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*/ |
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public function __construct(ReactPromise $promise) |
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{ |
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$promise->then( |
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function (ResponseInterface $response) { |
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$this->state = HttpPromise::FULFILLED; |
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$this->response = $response; |
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}, |
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function (Exception $error) { |
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$this->state = HttpPromise::REJECTED; |
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$this->exception = $error; |
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} |
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); |
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$this->promise = $promise; |
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} |
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/** |
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* Allow to apply callable when the promise resolve. |
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* |
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* @param callable|null $onFulfilled |
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* @param callable|null $onRejected |
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* |
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* @return ReactPromiseAdapter |
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*/ |
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public function then(callable $onFulfilled = null, callable $onRejected = null) |
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{ |
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$this->promise->then(function () use ($onFulfilled) { |
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if (null !== $onFulfilled) { |
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call_user_func($onFulfilled, $this->response); |
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} |
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}, function () use ($onRejected) { |
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if (null !== $onRejected) { |
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call_user_func($onRejected, $this->exception); |
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} |
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}); |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function getState() |
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{ |
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return $this->state; |
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} |
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/** |
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* Set EventLoop used for synchronous processing. |
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* |
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* @param LoopInterface $loop |
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* |
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* @return ReactPromiseAdapter |
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*/ |
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public function setLoop(LoopInterface $loop) |
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{ |
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$this->loop = $loop; |
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return $this; |
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} |
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/** |
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* {@inheritdoc} |
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*/ |
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public function wait($unwrap = true) |
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{ |
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if (null === $this->loop) { |
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throw new \LogicException('You must set the loop before wait!'); |
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} |
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while (HttpPromise::PENDING === $this->getState()) { |
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$this->loop->tick(); |
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} |
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if ($unwrap) { |
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if (HttpPromise::REJECTED == $this->getState()) { |
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throw $this->exception; |
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} |
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return $this->response; |
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} |
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} |
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} |
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php-http /
react-adapter
