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<?php |
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declare(strict_types=1); |
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namespace unreal4u\MQTT\Protocol; |
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use unreal4u\MQTT\Exceptions\UnmatchingPacketIdentifiers; |
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use unreal4u\MQTT\Internals\ClientInterface; |
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use unreal4u\MQTT\Internals\ProtocolBase; |
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use unreal4u\MQTT\Internals\ReadableContent; |
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use unreal4u\MQTT\Internals\ReadableContentInterface; |
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use unreal4u\MQTT\Internals\WritableContentInterface; |
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/** |
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* A SUBACK Packet is sent by the Server to the Client to confirm receipt and processing of a SUBSCRIBE Packet. |
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*/ |
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final class SubAck extends ProtocolBase implements ReadableContentInterface |
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{ |
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use ReadableContent; |
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const CONTROL_PACKET_VALUE = 9; |
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/** |
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* @var int |
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*/ |
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private $packetIdentifier = 0; |
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/** |
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* Information about each topic |
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* @var string |
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*/ |
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private $payload = ''; |
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public function fillObject(string $rawMQTTHeaders, ClientInterface $client): ReadableContentInterface |
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{ |
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// Read out the remaining length bytes should only 1 byte have come in until now |
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if (\strlen($rawMQTTHeaders) === 1) { |
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$rawMQTTHeaders .= $client->readBrokerData(1); |
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} |
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$remainingLength = \ord($rawMQTTHeaders[1]); |
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// Check if we have a complete message |
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if ($remainingLength + 2 !== \strlen($rawMQTTHeaders)) { |
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$rawMQTTHeaders .= $client->readBrokerData($remainingLength + 2 - \strlen($rawMQTTHeaders)); |
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} |
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$this->packetIdentifier = $this->extractPacketIdentifier($rawMQTTHeaders); |
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// TODO Check which QoS corresponds to each topic we are subscribed to |
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$this->payload = substr($rawMQTTHeaders, 4); |
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return $this; |
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} |
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/** |
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* @inheritdoc |
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* @throws \LogicException |
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*/ |
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public function performSpecialActions(ClientInterface $client, WritableContentInterface $originalRequest): bool |
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{ |
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/** @var Subscribe $originalRequest */ |
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if ($this->packetIdentifier !== $originalRequest->getPacketIdentifier()) { |
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throw new UnmatchingPacketIdentifiers('Packet identifiers do not match!'); |
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} |
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$client->updateLastCommunication(); |
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return true; |
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} |
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/** |
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* @inheritdoc |
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*/ |
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public function getOriginControlPacket(): int |
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{ |
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return Subscribe::getControlPacketValue(); |
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} |
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} |
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unreal4u /
mqtt
