Method MQTTSubscriptionMessageReceived

src/backend/datasources/MQTTClient.cpp:1049–1071

! *\brief called when a message is received by a topic belonging to one of subscriptions of the client. * It passes the message to the appropriate MQTTSubscription which will pass it to the appropriate MQTTTopic */

 * It passes the message to the appropriate MQTTSubscription which will pass it to the appropriate MQTTTopic
 */
void MQTTClient::MQTTSubscriptionMessageReceived(const QMqttMessage& msg) {
	// Decide to interpret retain message or not
	if (!msg.retain() || m_MQTTRetain) {
		// If this is the first message from the topic, save its name
		if (!m_topicNames.contains(msg.topic().name()))
			m_topicNames.push_back(msg.topic().name());

		// Pass the message and the topic name to the MQTTSubscription which contains the topic
		for (auto* subscription : m_MQTTSubscriptions) {
			if (checkTopicContains(subscription->subscriptionName(), msg.topic().name())) {
				subscription->messageArrived(msg);
				Q_EMIT messagedReceived();
				break;
			}
		}

		// if the message was received by the will topic, update the last message received by it
		if (msg.topic().name() == m_MQTTWill.willTopic) {
			m_MQTTWill.willLastMessage = QLatin1String(msg.payload());
			Q_EMIT MQTTTopicsChanged();
		}
	}
}

/*!
 *\brief Handles some of the possible errors of the client, using MQTTErrorWidget