Add Mqtt item

src/mqttclient.h

@@ -0,0 +1,40 @@
+#ifndef MQTTCLIENT_H
+#define MQTTCLIENT_H
+
+#include <QMqttClient>
+#include <QObject>
+#include <QJsonObject>
+#include <map>
+
+class MqttClient: public QObject
+{
+	Q_OBJECT
+public:
+	struct Subscription
+	{
+		int ref;
+		QMqttSubscription* subscription;
+	};
+
+private:
+	QString baseTopicName;
+	std::shared_ptr<QMqttClient> client;
+	std::map<QString, Subscription*> subscriptions;
+
+private slots:
+	void onClientStateChanged(QMqttClient::ClientState state);
+	void onClientError(QMqttClient::ClientError error);
+
+public:
+	explicit MqttClient();
+	~MqttClient();
+	void start(const QJsonObject& settings);
+	void store(QJsonObject& json);
+	std::shared_ptr<QMqttClient> getClient();
+	Subscription* subscribe(QString topic);
+	void unsubscribe(Subscription* subscription);
+	void unsubscribe(QString topic);
+	QString getBaseTopic();
+};
+
+#endif // MQTTCLIENT_H