bluezperipheralconnectionmanager.cpp

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// Copyright (C) 2022 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
 
#include "bluezperipheralconnectionmanager_p.h"
#include "device1_bluez5_p.h"
 
#include <QtBluetooth/QBluetoothLocalDevice>
#include <QtDBus/QDBusConnection>
#include <QtCore/QLoggingCategory>
 
QT_BEGIN_NAMESPACE
 
Q_DECLARE_LOGGING_CATEGORY(QT_BT_BLUEZ)
 
using namespace Qt::StringLiterals;
using namespace QtBluetoothPrivate; // for D-Bus wrappers
 
QtBluezPeripheralConnectionManager::QtBluezPeripheralConnectionManager(
        const QBluetoothAddress& localAddress, QObject* parent)
    : QObject(parent),
      m_localDevice(new QBluetoothLocalDevice(localAddress, this))
{
    QObject::connect(m_localDevice, &QBluetoothLocalDevice::deviceDisconnected,
                     this, &QtBluezPeripheralConnectionManager::remoteDeviceDisconnected);
}
 
void QtBluezPeripheralConnectionManager::remoteDeviceAccessEvent(
        const QString& remoteDeviceObjectPath, quint16 mtu)
{
    if (m_clients.contains(remoteDeviceObjectPath))
        return; // Already aware of the client
 
    std::unique_ptr<OrgBluezDevice1Interface> device{new OrgBluezDevice1Interface(
                                                     "org.bluez"_L1, remoteDeviceObjectPath,
                                                     QDBusConnection::systemBus(), this)};
 
    qCDebug(QT_BT_BLUEZ) << "New LE Gatt client connected: " << remoteDeviceObjectPath
                         << device->address() << device->name() << "mtu:" << mtu;
 
    RemoteDeviceDetails details{QBluetoothAddress{device->address()}, device->name(), mtu};
 
    m_clients.insert(remoteDeviceObjectPath, details);
    if (!m_connected) {
        m_connected = true;
        emit connectivityStateChanged(true);
    }
    emit remoteDeviceChanged(details.address, details.name, details.mtu);
}
 
void QtBluezPeripheralConnectionManager::remoteDeviceDisconnected(const QBluetoothAddress& address)
{
    // Find if the disconnected device was gatt client
    bool remoteDetailsChanged{false};
    for (auto it = m_clients.begin(); it != m_clients.end(); it++) {
        if (it.value().address == address) {
            qCDebug(QT_BT_BLUEZ) << "LE Gatt client disconnected:" << address;
            remoteDetailsChanged = true;
            m_clients.remove(it.key());
            break;
        }
    }
 
    if (!remoteDetailsChanged)
        return;
 
    if (m_clients.isEmpty() && m_connected) {
        m_connected = false;
        emit connectivityStateChanged(false);
    }
 
    // If a client disconnected but there are others, pick any other.
    // Qt API doesn't distinguish between clients
    if (!m_clients.isEmpty()) {
        emit remoteDeviceChanged(m_clients.last().address,
                                 m_clients.last().name, m_clients.last().mtu);
    }
}
 
void QtBluezPeripheralConnectionManager::disconnectDevices()
{
    for (auto it = m_clients.begin(); it != m_clients.end(); it++) {
        std::unique_ptr<OrgBluezDevice1Interface> device{new OrgBluezDevice1Interface(
                        "org.bluez"_L1, it.key(), QDBusConnection::systemBus())};
        device->Disconnect();
    }
    reset();
}
 
void QtBluezPeripheralConnectionManager::reset()
{
    m_connected = false;
    m_clients.clear();
}
 
QT_END_NAMESPACE
 
#include "moc_bluezperipheralconnectionmanager_p.cpp"