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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."
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "mqttdataproviderpool.h"
#include "mqttdataprovider.h"
#include <QtCore/QDebug>
MqttDataProviderPool::MqttDataProviderPool(QObject *parent)
: DataProviderPool(parent)
, m_client(new QMqttClient(this))
{
m_poolName = "Mqtt";
}
void MqttDataProviderPool::startScanning()
{
emit providerConnected("MQTT_CLOUD");
emit providersUpdated();
emit dataProvidersChanged();
m_client->setHostname(QLatin1String(MQTT_BROKER));
m_client->setPort(MQTT_PORT);
m_client->setUsername(QByteArray(MQTT_USERNAME));
m_client->setPassword(QByteArray(MQTT_PASSWORD));
connect(m_client, &QMqttClient::connected, [this]() {
auto sub = m_client->subscribe(QLatin1String("sensors/active"));
connect(sub, &QMqttSubscription::messageReceived, this, &MqttDataProviderPool::deviceUpdate);
});
connect(m_client, &QMqttClient::disconnected, [this]() {
qDebug() << "Pool client disconnected";
});
m_client->connectToHost();
}
void MqttDataProviderPool::deviceUpdate(const QMqttMessage &msg)
{
static QSet<QString> knownDevices;
// Registration is: deviceName>Online
const QByteArrayList payload = msg.payload().split('>');
const QString deviceName = payload.first();
const QString deviceStatus = payload.at(1);
const QString subName = QString::fromLocal8Bit("sensors/%1/#").arg(deviceName);
bool updateRequired = false;
if (deviceStatus == QLatin1String("Online")) { // new device
// Skip local items
if (deviceName.startsWith(QSysInfo::machineHostName()))
return;
if (!knownDevices.contains(deviceName)) {
auto prov = new MqttDataProvider(deviceName, m_client, this);
prov->setState(SensorTagDataProvider::Connected);
m_dataProviders.push_back(prov);
if (m_currentProvider == nullptr)
setCurrentProviderIndex(m_dataProviders.size() - 1);
knownDevices.insert(deviceName);
updateRequired = true;
}
} else if (deviceStatus == QLatin1String("Offline")) { // device died
knownDevices.remove(deviceName);
updateRequired = true;
for (auto prov : m_dataProviders) {
if (prov->id() == deviceName) {
m_dataProviders.removeAll(prov);
break;
}
}
}
if (updateRequired) {
emit providersUpdated();
emit dataProvidersChanged();
}
}
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