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<?php |
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/* |
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* (c) Alexander Zhukov <[email protected]> |
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* |
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* For the full copyright and license information, please view the LICENSE |
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* file that was distributed with this source code. |
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*/ |
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namespace Zbox\UnifiedPush\Notification; |
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use Zbox\UnifiedPush\Message\MessageInterface; |
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use Zbox\UnifiedPush\Exception\MalformedNotificationException; |
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use Zbox\UnifiedPush\Exception\DomainException; |
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/** |
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* Class NotificationBuilder |
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* @package Zbox\UnifiedPush\Notification |
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*/ |
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class NotificationBuilder |
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{ |
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/** |
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* @var PayloadHandlerInterface[] |
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*/ |
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private $payloadHandlers; |
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/** |
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* @var MessageInterface |
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*/ |
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private $message; |
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/** |
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* @var \ArrayIterator |
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*/ |
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private $notifications; |
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/** |
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* @param PayloadHandlerInterface $handler |
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* @return $this |
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*/ |
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public function addPayloadHandler(PayloadHandlerInterface $handler) |
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{ |
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$hash = spl_object_hash($handler); |
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if (!isset($this->payloadHandlers[$hash])) { |
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$this->payloadHandlers[$hash] = $handler; |
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} |
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return $this; |
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} |
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/** |
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* @return Notification|null |
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*/ |
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public function getNotification() |
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{ |
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$collection = $this->notifications; |
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if ($collection->valid()) { |
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$notification = $collection->current(); |
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$collection->next(); |
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return $notification; |
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} |
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return null; |
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} |
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/** |
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* Generates number of notifications by message recipient count |
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* and notification service limitations |
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* |
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* @param MessageInterface $message |
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* @return $this |
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*/ |
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public function buildNotifications(MessageInterface $message) |
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{ |
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$this->message = $message; |
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$this->notifications = new \ArrayIterator(); |
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$recipientQueue = new \SplQueue(); |
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$recipientChunk = new \ArrayIterator(); |
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foreach ($message->getRecipientDeviceCollection() as $recipient) { |
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$recipientChunk->append($recipient); |
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if ($recipientChunk->count() >= $message->getMaxRecipientsPerMessage()) { |
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$recipientQueue->enqueue($recipientChunk); |
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$recipientChunk = new \ArrayIterator(); |
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} |
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} |
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if ($recipientChunk->count()) { |
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$recipientQueue->enqueue($recipientChunk); |
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} |
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while (!$recipientQueue->isEmpty()) { |
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$notification = $this->createNotification($recipientQueue->dequeue()); |
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$this->notifications->append($notification); |
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} |
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return $this; |
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} |
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/** |
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* Returns created notification |
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* |
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* @param \ArrayIterator $recipients |
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* @return Notification |
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* @throws MalformedNotificationException |
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*/ |
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private function createNotification(\ArrayIterator $recipients) |
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{ |
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$message = clone $this->message; |
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$message->setRecipientDeviceCollection($recipients); |
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foreach ($this->payloadHandlers as $handler) { |
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if ($handler->isSupported($message)) { |
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$packedPayload = $this->handlePayload($handler, $message); |
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$customData = $handler->getCustomNotificationData(); |
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return |
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(new Notification()) |
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->setRecipients($recipients) |
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->setPayload($packedPayload) |
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->setCustomNotificationData($customData) |
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; |
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} |
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} |
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throw new DomainException( |
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sprintf( |
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'Unhandled message type %s', |
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$message->getMessageType() |
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) |
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); |
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} |
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/** |
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* @param PayloadHandlerInterface $handler |
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* @param MessageInterface $message |
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* @return string |
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* @throws MalformedNotificationException |
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*/ |
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private function handlePayload(PayloadHandlerInterface $handler, MessageInterface $message) |
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{ |
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$handler->setMessage($message); |
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$payload = $handler->createPayload(); |
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$packedPayload = $handler->packPayload($payload); |
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$this->validatePayload($handler, $packedPayload); |
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return $packedPayload; |
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} |
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/** |
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* Check if maximum size allowed for a notification payload exceeded |
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* |
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* @param PayloadHandlerInterface $handler |
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* @param string $payload |
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* @throws MalformedNotificationException |
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*/ |
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private function validatePayload(PayloadHandlerInterface $handler, $payload) |
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{ |
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$message = $this->message; |
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$messageType = $message->getMessageType(); |
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$maxLength = $handler->getPayloadMaxLength(); |
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if (strlen($payload) > $maxLength) { |
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throw new MalformedNotificationException( |
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sprintf( |
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"The maximum size allowed for '%s' notification payload is %d bytes", |
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$messageType, |
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$maxLength |
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) |
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); |
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} |
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} |
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} |
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zbox /
UnifiedPush
