/*
Copyright 2009 Will Stephenson <wstephenson@kde.org>

This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) version 3, or any
later version accepted by the membership of KDE e.V. (or its
successor approved by the membership of KDE e.V.), which shall
act as a proxy defined in Section 6 of version 3 of the license.

This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public
License along with this library.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef BACKENDS_NETWORKMANAGER_NMDBUSACTIVECONNECTIONMONITOR_H
#define BACKENDS_NETWORKMANAGER_NMDBUSACTIVECONNECTIONMONITOR_H

#include "activatableobserver.h"

#include <QVariantMap>

#include <Solid/Networking>

#include "knm_export.h"

namespace Knm
{
    class InterfaceConnection;
} // namespace Knm

class ActivatableList;
class NMDBusSystemSettingsMonitor;

class NMDBusActiveConnectionMonitorPrivate;
class OrgFreedesktopNetworkManagerConnectionActiveInterface;
class OrgFreedesktopNetworkManagerVPNConnectionInterface;

/**
 * Watches the list of active connections and updates InterfaceConnections' state
 *
 * This class is dependent on NMDBusSettingsService and NMDBusConnectionProvider being
 * instantiated and registered to the activatableList first in order to tag
 * InterfaceConnections with dbus object path and service so that this can match up
 * activeconnections.
 */
class KNM_EXPORT NMDBusActiveConnectionMonitor : public QObject, public ActivatableObserver
{
Q_OBJECT
public:
    NMDBusActiveConnectionMonitor(ActivatableList * activatables, QObject * parent = 0);
    ~NMDBusActiveConnectionMonitor();
    /**
     * Used to keep track of InterfaceConnections
     */
    void handleAdd(Knm::Activatable *);
    void handleUpdate(Knm::Activatable *);
    /**
     * We keep references to InterfaceConnections we have modified.  This cleans that list in case
     * an InterfaceConnection is removed while we have modified it.
     */
    void handleRemove(Knm::Activatable *);

private Q_SLOTS:
    /**
     * Start tracking a Connection.Active
     */
    void activeConnectionListChanged();

    /**
     * Clean state if NetworkManager exits
     */
    void networkingStatusChanged(Solid::Networking::Status);

private:
    // locate the interfaceconnection object for a remote active connection (that has signalled)
    Knm::InterfaceConnection * interfaceConnectionForConnectionActive(OrgFreedesktopNetworkManagerConnectionActiveInterface * connectionActive);
    Q_DECLARE_PRIVATE(NMDBusActiveConnectionMonitor)
    NMDBusActiveConnectionMonitorPrivate * d_ptr;
};

/**
 * Links a DBUS interface object for an active connection to a Knm::InterfaceConnection,
 * updating its state
 */
class NMDBusActiveConnectionProxy : public QObject
{
Q_OBJECT
public:
    NMDBusActiveConnectionProxy(Knm::InterfaceConnection * interfaceConnection,
            OrgFreedesktopNetworkManagerConnectionActiveInterface * activeConnectionIface);
    virtual ~NMDBusActiveConnectionProxy();
    Knm::InterfaceConnection * interfaceConnection() const;
public slots:
    void handlePropertiesChanged(const QVariantMap & changedProps);
protected:
    OrgFreedesktopNetworkManagerConnectionActiveInterface * m_activeConnectionIface;
    Knm::InterfaceConnection * m_interfaceConnection;
};

class NMDBusVPNConnectionProxy : public NMDBusActiveConnectionProxy
{
Q_OBJECT
public:
    NMDBusVPNConnectionProxy(Knm::InterfaceConnection * interfaceConnection,
            OrgFreedesktopNetworkManagerConnectionActiveInterface * activeConnectionIface);
public slots:
    void handleVPNPropertiesChanged(const QVariantMap & changedProps);
protected:
    void setState(uint vpnState);
    OrgFreedesktopNetworkManagerVPNConnectionInterface * m_vpnConnectionIface;
};

#endif // BACKENDS_NETWORKMANAGER_NMDBUSACTIVECONNECTIONMONITOR_H
