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<?php |
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namespace TraderInteractive\Api; |
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use ArrayObject; |
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use DominionEnterprises\Util; |
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use GuzzleHttp\Client as GuzzleClient; |
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use GuzzleHttp\ClientInterface as GuzzleClientInterface; |
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use GuzzleHttp\Exception\RequestException; |
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use GuzzleHttp\Promise; |
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use Psr\Http\Message\ResponseInterface; |
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/** |
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* Concrete implentation of Adapter interface |
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*/ |
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final class GuzzleAdapter implements AdapterInterface |
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{ |
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/** |
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* Collection of Promise\PromiseInterface instances with keys matching what was given from start(). |
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* |
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* @var array |
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*/ |
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private $promises = []; |
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/** |
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* Collection of Api\Response with keys matching what was given from start(). |
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* |
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* @var array |
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*/ |
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private $responses = []; |
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/** |
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* Collection of \Exception with keys matching what was given from start(). |
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* |
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* @var ArrayObject |
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*/ |
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private $exceptions; |
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/** |
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* @var GuzzleClientInterface |
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*/ |
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private $client; |
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public function __construct(GuzzleClientInterface $client = null) |
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{ |
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$this->exceptions = new ArrayObject(); |
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$this->client = $client ?? new GuzzleClient( |
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[ |
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'allow_redirects' => false, //stop guzzle from following redirects |
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'http_errors' => false, //only for 400/500 error codes, actual exceptions can still happen |
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] |
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); |
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} |
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/** |
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* @see AdapterInterface::start() |
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*/ |
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public function start(Request $request) : string |
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{ |
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$handle = uniqid(); |
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$this->promises[$handle] = $this->client->requestAsync( |
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$request->getMethod(), |
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$request->getUrl(), |
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[ |
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'headers' => $request->getHeaders(), |
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'body' => $request->getBody(), |
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] |
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); |
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return $handle; |
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} |
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/** |
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* @see Adapter::end() |
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* |
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* @throws \InvalidArgumentException |
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*/ |
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public function end(string $endHandle) : Response |
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{ |
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$results = $this->fulfillPromises($this->promises, $this->exceptions); |
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foreach ($results as $handle => $response) { |
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try { |
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$body = []; //default to empty body |
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$contents = (string)$response->getBody(); |
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if (trim($contents) !== '') { |
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$body = json_decode($contents, true); |
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Util::ensure( |
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JSON_ERROR_NONE, |
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json_last_error(), |
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'\UnexpectedValueException', |
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[json_last_error_msg()] |
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); |
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} |
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$this->responses[$handle] = new Response($response->getStatusCode(), $response->getHeaders(), $body); |
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} catch (\Exception $e) { |
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$this->exceptions[$handle] = $e; |
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} |
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} |
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$this->promises = []; |
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if (array_key_exists($endHandle, $this->exceptions)) { |
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$exception = $this->exceptions[$endHandle]; |
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unset($this->exceptions[$endHandle]); |
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throw $exception; |
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} |
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if (array_key_exists($endHandle, $this->responses)) { |
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$response = $this->responses[$endHandle]; |
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unset($this->responses[$endHandle]); |
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return $response; |
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} |
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throw new \InvalidArgumentException('$endHandle not found'); |
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} |
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/** |
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* Helper method to execute all guzzle promises. |
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* |
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* @param array $promises |
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* @param array $exceptions |
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* |
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* @return array Array of fulfilled PSR7 responses. |
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*/ |
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private function fulfillPromises(array $promises, ArrayObject $exceptions) : array |
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{ |
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if (empty($promises)) { |
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return []; |
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} |
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$results = new ArrayObject(); |
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Promise\each( |
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$this->promises, |
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function (ResponseInterface $response, $index) use ($results) { |
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$results[$index] = $response; |
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}, |
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function (RequestException $e, $index) use ($exceptions) { |
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$exceptions[$index] = $e; |
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} |
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)->wait(); |
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return $results->getArrayCopy(); |
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} |
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} |
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traderinteractive /
tol-api-php
