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/*
* NetworkObjectDirectory.h - base class for network object directory implementations
*
* Copyright (c) 2017-2021 Tobias Junghans <tobydox@veyon.io>
*
* This file is part of Veyon - https://veyon.io
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This program 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
* General Public License for more details.
*
* You should have received a copy of the GNU General Public
* License along with this program (see COPYING); if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*
*/
#pragma once
#include <QHash>
#include <QObject>
#include "NetworkObject.h"
class QTimer;
class VEYON_CORE_EXPORT NetworkObjectDirectory : public QObject
{
Q_OBJECT
public:
enum {
MinimumUpdateInterval = 10,
DefaultUpdateInterval = 60,
MaximumUpdateInterval = 3600
};
explicit NetworkObjectDirectory( QObject* parent );
void setUpdateInterval( int interval );
const NetworkObjectList& objects( const NetworkObject& parent ) const;
const NetworkObject& object( NetworkObject::ModelId parent, NetworkObject::ModelId object ) const;
int index( NetworkObject::ModelId parent, NetworkObject::ModelId child ) const;
int childCount( NetworkObject::ModelId parent ) const;
NetworkObject::ModelId childId( NetworkObject::ModelId parent, int index ) const;
NetworkObject::ModelId parentId( NetworkObject::ModelId child ) const;
NetworkObject::ModelId rootId() const;
virtual NetworkObjectList queryObjects( NetworkObject::Type type,
NetworkObject::Attribute attribute, const QVariant& value );
virtual NetworkObjectList queryParents( const NetworkObject& child );
virtual void update() = 0;
virtual void fetchObjects( const NetworkObject& object );
protected:
using NetworkObjectFilter = std::function<bool (const NetworkObject &)>;
bool hasObjects() const;
void addOrUpdateObject( const NetworkObject& networkObject, const NetworkObject& parent );
void removeObjects( const NetworkObject& parent, const NetworkObjectFilter& removeObjectFilter );
void replaceObjects( const NetworkObjectList& objects, const NetworkObject& parent );
void setObjectPopulated( const NetworkObject& networkObject );
private:
QTimer* m_updateTimer;
QHash<NetworkObject::ModelId, NetworkObjectList> m_objects;
NetworkObject m_invalidObject;
NetworkObject m_rootObject;
NetworkObjectList m_defaultObjectList;
Q_SIGNALS:
void objectsAboutToBeInserted( const NetworkObject& parent, int index, int count );
void objectsInserted();
void objectsAboutToBeRemoved( const NetworkObject& parent, int index, int count );
void objectsRemoved();
void objectChanged( const NetworkObject& parent, int index );
};
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