/*

 * Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

 * All rights reserved.

 * This component and the accompanying materials are made available

 * under the terms of "Eclipse Public License v1.0"

 * which accompanies this distribution, and is available

 * at the URL "http://www.eclipse.org/legal/epl-v10.html".

 *

 * Initial Contributors:

 * Nokia Corporation - initial contribution.

 *

 * Contributors:

 *

 * Description: 

 *

 */

#ifndef NMHSWIDGETEMAILENGINE_H_

#define NMHSWIDGETEMAILENGINE_H_

#include <QObject>

class NmMessageEnvelope;

class NmFrameworkAdapter_stub;

//Maximum amount of envelopes that can be provided to client in getData function

//This is also the amount of envelopes that is kept in mData all the time

const int KMaxNumberOfEnvelopesProvided = 2;

//Maximum value for unread count. Counting will stop when this limit is reached

const int KMaxUnreadCount = 999; 

class NmHsWidgetEmailEngine : public QObject

    {

    Q_OBJECT

public:

    NmHsWidgetEmailEngine();

    ~NmHsWidgetEmailEngine();

    int getEnvelopes(QList<NmMessageEnvelope> &list, int maxEnvelopeAmount);

    int unreadCount();

    QString accountName();

public slots:

    void updateData(); 

    void updateAccount();

signals:

    void mailDataChanged();    

    void accountNameChanged(const QString& accountName);

    void unreadCountChanged(const int& unreadCount);

private:

    int calculateUnreadCount(QList<NmMessageEnvelope*> envelopeList);

    void resetEnvelopeList();

    void shrinkEnvelopeList();

private:

    QString mAccountName;

    int mUnreadCount;

    QList<NmMessageEnvelope*> mEnvelopeList;

    NmFrameworkAdapter_stub* m_stub_adapter; 

    };

#endif /* NMHSWIDGETEMAILENGINE_H_ */