publishcopyfactory.cpp
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#include <cassert>
#include "publishcopyfactory.h"
#include "mqttpacket.h"
PublishCopyFactory::PublishCopyFactory(MqttPacket *packet) :
packet(packet),
orgQos(packet->getQos())
{
}
PublishCopyFactory::PublishCopyFactory(Publish *publish) :
publish(publish),
orgQos(publish->qos)
{
}
MqttPacket *PublishCopyFactory::getOptimumPacket(char max_qos, ProtocolVersion protocolVersion)
{
// TODO: cache idea: a set of constructed packets per branch in this code, witn an int identifier.
if (packet)
{
// TODO: some flag on packet 'containsClientSpecificStuff'
if (max_qos == 0 && max_qos < packet->getQos() && packet->getProtocolVersion() == protocolVersion && protocolVersion <= ProtocolVersion::Mqtt311)
{
// TODO: getCopy now also makes packets with Publish objects. I think I only want to do that here.
if (!downgradedQos0PacketCopy)
downgradedQos0PacketCopy = packet->getCopy(max_qos); // TODO: getCopy perhaps std::unique_ptr
assert(downgradedQos0PacketCopy->getQos() == 0);
return downgradedQos0PacketCopy.get();
}
else if (packet->getProtocolVersion() >= ProtocolVersion::Mqtt5 || protocolVersion >= ProtocolVersion::Mqtt5)
{
Publish *pub = packet->getPublish();
pub->setClientSpecificProperties(); // TODO
this->oneShotPacket = std::make_unique<MqttPacket>(protocolVersion, *pub);
return this->oneShotPacket.get();
}
return packet;
}
assert(publish);
publish->setClientSpecificProperties();
this->oneShotPacket = std::make_unique<MqttPacket>(protocolVersion, *publish);
return this->oneShotPacket.get();
}
char PublishCopyFactory::getEffectiveQos(char max_qos) const
{
const char effectiveQos = std::min<char>(orgQos, max_qos);
return effectiveQos;
}
const std::string &PublishCopyFactory::getTopic() const
{
if (packet)
return packet->getTopic();
assert(publish);
return publish->topic;
}
const std::vector<std::string> &PublishCopyFactory::getSubtopics()
{
if (packet)
{
assert(!packet->getSubtopics().empty());
return packet->getSubtopics();
}
else if (publish)
{
if (publish->subtopics.empty())
splitTopic(publish->topic, publish->subtopics);
return publish->subtopics;
}
throw std::runtime_error("Bug in &PublishCopyFactory::getSubtopics()");
}
bool PublishCopyFactory::getRetain() const
{
if (packet)
return packet->getRetain();
assert(publish);
return publish->retain;
}
Publish PublishCopyFactory::getNewPublish() const
{
assert(packet->getQos() > 0); // We only need to construct new publishes for QoS. If you're doing it elsewhere, it's a bug.
if (packet)
{
Publish p(*packet->getPublish());
return p;
}
Publish p(*publish);
return p;
}
std::shared_ptr<Client> PublishCopyFactory::getSender()
{
if (packet)
return packet->getSender();
return std::shared_ptr<Client>(0);
}