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<?php |
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namespace Mdb\PayPal\Ipn; |
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use Http\Client\Exception; |
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use Http\Message\StreamFactory; |
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use Mdb\PayPal\Ipn\Event\IpnInvalidEvent; |
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use Mdb\PayPal\Ipn\Event\IpnVerificationFailureEvent; |
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use Mdb\PayPal\Ipn\Event\IpnVerifiedEvent; |
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use Symfony\Component\EventDispatcher\EventDispatcherInterface; |
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class Listener |
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{ |
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const IPN_VERIFIED_EVENT = 'ipn.message.verified'; |
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const IPN_INVALID_EVENT = 'ipn.message.invalid'; |
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const IPN_VERIFICATION_FAILURE_EVENT = 'ipn.message.verification_failure'; |
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/** |
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* @var StreamFactory |
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*/ |
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private $streamFactory; |
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/** |
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* @var Verifier |
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*/ |
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private $verifier; |
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/** |
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* @var EventDispatcherInterface |
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*/ |
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private $eventDispatcher; |
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/** |
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* @param StreamFactory $streamFactory |
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* @param Verifier $verifier |
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* @param EventDispatcherInterface $eventDispatcher |
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*/ |
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public function __construct( |
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StreamFactory $streamFactory, |
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Verifier $verifier, |
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EventDispatcherInterface $eventDispatcher |
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) { |
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$this->streamFactory = $streamFactory; |
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$this->verifier = $verifier; |
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$this->eventDispatcher = $eventDispatcher; |
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} |
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public function listen() |
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{ |
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$datas = $this->parseQuery($this->createStream()->getContents()); |
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try { |
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$result = $this->verifier->verify($datas); |
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if ($result) { |
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$eventName = self::IPN_VERIFIED_EVENT; |
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$event = new IpnVerifiedEvent($datas); |
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} else { |
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$eventName = self::IPN_INVALID_EVENT; |
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$event = new IpnInvalidEvent($datas); |
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} |
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} catch (\UnexpectedValueException $e) { |
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$eventName = self::IPN_VERIFICATION_FAILURE_EVENT; |
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$event = new IpnVerificationFailureEvent($datas, $e->getMessage()); |
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} catch (Exception $e) { |
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$eventName = self::IPN_VERIFICATION_FAILURE_EVENT; |
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$event = new IpnVerificationFailureEvent($datas, $e->getMessage()); |
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} |
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$this->eventDispatcher->dispatch($eventName, $event); |
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} |
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/** |
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* @param callable $listener |
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*/ |
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public function onVerified($listener) |
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{ |
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$this->eventDispatcher->addListener(self::IPN_VERIFIED_EVENT, $listener); |
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} |
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/** |
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* @param callable $listener |
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*/ |
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public function onInvalid($listener) |
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{ |
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$this->eventDispatcher->addListener(self::IPN_INVALID_EVENT, $listener); |
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} |
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/** |
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* @param callable $listener |
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*/ |
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public function onVerificationFailure($listener) |
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{ |
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$this->eventDispatcher->addListener(self::IPN_VERIFICATION_FAILURE_EVENT, $listener); |
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} |
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/** |
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* @return \Psr\Http\Message\StreamInterface |
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*/ |
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protected function createStream() |
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{ |
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$ex = null; |
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set_error_handler(function () use ($filename, $mode, &$ex) { |
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$ex = new \RuntimeException(sprintf( |
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'Unable to open %s using mode %s: %s', |
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$filename, |
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$mode, |
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func_get_args()[1] |
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)); |
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}); |
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$handle = fopen('php://input', 'r'); |
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restore_error_handler(); |
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if ($ex) { |
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/* @var $ex \RuntimeException */ |
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throw $ex; |
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} |
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return $this->streamFactory->createStream($handle); |
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} |
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private function parseQuery($str) |
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{ |
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$result = []; |
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if ($str === '') { |
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return $result; |
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} |
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foreach (explode('&', $str) as $kvp) { |
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$parts = explode('=', $kvp, 2); |
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$key = urldecode($parts[0]); |
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$value = isset($parts[1]) ? urldecode($parts[1]) : null; |
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if (!isset($result[$key])) { |
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$result[$key] = $value; |
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} else { |
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if (!is_array($result[$key])) { |
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$result[$key] = [$result[$key]]; |
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} |
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$result[$key][] = $value; |
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} |
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} |
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return $result; |
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} |
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} |
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mike182uk /
paypal-ipn-listener
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This check marks access to variables or properties that have not been declared yet. While PHP has no explicit notion of declaring a variable, accessing it before a value is assigned to it is most likely a bug.