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/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the examples of Qt for Device Creation.
**
** $QT_BEGIN_LICENSE:BSD$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** BSD License Usage
** Alternatively, you may use this file under the terms of the BSD license
** as follows:
**
** "Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions are
** met:
**   * Redistributions of source code must retain the above copyright
**     notice, this list of conditions and the following disclaimer.
**   * Redistributions in binary form must reproduce the above copyright
**     notice, this list of conditions and the following disclaimer in
**     the documentation and/or other materials provided with the
**     distribution.
**   * Neither the name of The Qt Company Ltd nor the names of its
**     contributors may be used to endorse or promote products derived
**     from this software without specific prior written permission.
**
**
** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#ifndef MQTTUPDATE_H
#define MQTTUPDATE_H

#include <QObject>
#include <QTimer>

class DataProviderPool;
class SensorTagDataProvider;
class QMqttClient;

//#define MQTT_TIMER_BASED_PUBLISH 1

class MqttEventHandler : public QObject
{
    Q_OBJECT
public:
    explicit MqttEventHandler(const QString &name, QObject *parent = nullptr);
    ~MqttEventHandler();
    DataProviderPool *m_providerPool;
public slots:
    void uploadGyro();
    void uploadTemperature();
    void uploadHumidity();
    void uploadLight();
    void uploadAltitude();
    void uploadBarometer();
    void uploadAccelerometer();
    void uploadMagnetometer();
    void uploadRotation();

    void clientConnected();
    void sendAlive();

private:
    QString m_deviceName;
    QString m_topicPrefix;
    QMqttClient *m_client;
    QTimer m_pingTimer;
};

class MqttUpdate : public QObject
{
    Q_OBJECT
public:
    explicit MqttUpdate(QObject *parent = nullptr);

    void setDataProviderPool(DataProviderPool *provider);

    int updateInterval() const;
    void setUpdateInterval(int interval);
    void restart();
    void stop();

#ifdef MQTT_TIMER_BASED_PUBLISH
protected:
    void timerEvent(QTimerEvent* event);
    virtual void writeToCloud();
#else
#endif

protected:
    DataProviderPool *m_providerPool;
private:
    QThread *m_handlerThread;
    MqttEventHandler *m_handler;
    int m_updateInterval;
#ifdef MQTT_TIMER_BASED_PUBLISH
    int m_timerId;
#endif
};

#endif // MQTTUPDATE_H