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<?php |
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namespace EightPoints\Bundle\GuzzleBundle\Middleware; |
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use EightPoints\Bundle\GuzzleBundle\Events\Event; |
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use EightPoints\Bundle\GuzzleBundle\Events\PostTransactionEvent; |
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use Exception; |
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use GuzzleHttp\Exception\RequestException; |
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use Psr\Http\Message\RequestInterface; |
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use Psr\Http\Message\ResponseInterface; |
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use Symfony\Component\EventDispatcher\EventDispatcherInterface; |
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use Symfony\Contracts\EventDispatcher\EventDispatcherInterface as ContractsEventDispatcherInterface; |
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use EightPoints\Bundle\GuzzleBundle\Events\GuzzleEvents; |
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use EightPoints\Bundle\GuzzleBundle\Events\PreTransactionEvent; |
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/** |
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* Dispatches an Event using the Symfony Event Dispatcher. |
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* Dispatches a PRE_TRANSACTION event, before the transaction is sent |
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* Dispatches a POST_TRANSACTION event, when the remote hosts responds. |
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*/ |
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class EventDispatchMiddleware |
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{ |
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/** @var \Symfony\Component\EventDispatcher\EventDispatcherInterface */ |
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private $eventDispatcher; |
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/** @var string */ |
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private $serviceName; |
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/** |
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* @param \Symfony\Component\EventDispatcher\EventDispatcherInterface $eventDispatcher |
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* @param string $serviceName |
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*/ |
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public function __construct(EventDispatcherInterface $eventDispatcher, string $serviceName) |
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{ |
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$this->eventDispatcher = $eventDispatcher; |
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$this->serviceName = $serviceName; |
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} |
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/** |
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* @return \Closure |
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*/ |
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public function dispatchEvent() : \Closure |
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{ |
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return function (callable $handler) { |
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return function ( |
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RequestInterface $request, |
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array $options |
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) use ($handler) { |
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// Create the Pre Transaction event. |
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$preTransactionEvent = new PreTransactionEvent($request, $this->serviceName); |
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// Dispatch it through the symfony Dispatcher. |
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$this->doDispatch($preTransactionEvent, GuzzleEvents::PRE_TRANSACTION); |
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$this->doDispatch($preTransactionEvent, GuzzleEvents::preTransactionFor($this->serviceName)); |
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// Continue the handler chain. |
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$promise = $handler($preTransactionEvent->getTransaction(), $options); |
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// Handle the response form the server. |
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return $promise->then( |
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function (ResponseInterface $response) { |
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// Create the Post Transaction event. |
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$postTransactionEvent = new PostTransactionEvent($response, $this->serviceName); |
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// Dispatch the event on the symfony event dispatcher. |
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$this->doDispatch($postTransactionEvent, GuzzleEvents::POST_TRANSACTION); |
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$this->doDispatch($postTransactionEvent, GuzzleEvents::postTransactionFor($this->serviceName)); |
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// Continue down the chain. |
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return $postTransactionEvent->getTransaction(); |
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}, |
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function (Exception $reason) { |
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// Get the response. The response in a RequestException can be null too. |
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$response = $reason instanceof RequestException ? $reason->getResponse() : null; |
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// Create the Post Transaction event. |
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$postTransactionEvent = new PostTransactionEvent($response, $this->serviceName); |
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// Dispatch the event on the symfony event dispatcher. |
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$this->doDispatch($postTransactionEvent, GuzzleEvents::POST_TRANSACTION); |
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$this->doDispatch($postTransactionEvent, GuzzleEvents::postTransactionFor($this->serviceName)); |
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// Continue down the chain. |
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return \GuzzleHttp\Promise\rejection_for($reason); |
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} |
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); |
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}; |
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}; |
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} |
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private function doDispatch(Event $event, string $name): void |
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{ |
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if ($this->eventDispatcher instanceof ContractsEventDispatcherInterface) { |
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$this->eventDispatcher->dispatch($event, $name); |
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return; |
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} |
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// BC compatibility |
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$this->eventDispatcher->dispatch($name, $event); |
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} |
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} |
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