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<?php |
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declare(strict_types=1); |
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namespace unreal4u\MQTT\Application; |
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use Psr\Log\LoggerInterface; |
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use unreal4u\MQTT\DummyLogger; |
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/** |
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* This is an example of a payload class that performs some processing on the data |
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* |
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* This particular case will prepend a datetime to the message itself. It will json_encode() it into the payload and |
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* when retrieving it will set the public property $originalPublishDateTime. |
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*/ |
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final class DatedPayload implements PayloadInterface |
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{ |
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/** |
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* The actual payload contents |
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* @var string |
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*/ |
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private $payload = ''; |
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/** |
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* @var \DateTimeImmutable |
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*/ |
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public $originalPublishDateTime; |
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/** |
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* @var LoggerInterface |
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*/ |
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private $logger; |
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public function __construct(string $messageContents = null, LoggerInterface $logger = null) |
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{ |
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// Set the logger before setting the payload so that we already have it in the object |
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if ($logger === null) { |
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$logger = new DummyLogger(); |
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} |
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$this->logger = $logger; |
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if ($messageContents !== null) { |
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$this->setPayload($messageContents); |
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} |
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} |
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public function setPayload(string $contents): PayloadInterface |
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{ |
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$this->payload = $contents; |
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$this->originalPublishDateTime = new \DateTimeImmutable('now'); |
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return $this; |
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} |
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public function getPayload(): string |
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{ |
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return $this->payload; |
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} |
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public function processIncomingPayload(string $contents): PayloadInterface |
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{ |
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$this->logger->debug('Processing incoming payload'); |
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$decodedData = json_decode($contents, true); |
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$this->originalPublishDateTime = new \DateTimeImmutable($decodedData['publishDateTime']); |
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$this->payload = $decodedData['payload']; |
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return $this; |
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} |
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public function getProcessedPayload(): string |
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{ |
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return json_encode(['publishDateTime' => date('r'), 'payload' => $this->payload]); |
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} |
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} |
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unreal4u /
mqtt
