/*

* 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 NMMESSAGELISTMODEL_H_

#define NMMESSAGELISTMODEL_H_

#include <QStandardItemModel>

#include "nmuienginedef.h"

#include "nmcommon.h"

#include "nmmessagelistmodelitem.h"

#include "nmuiviewids.h"

class NmMessage;

class NmDataManager;

class QModelIndex;

class NmMessageEnvelope;

class NMUIENGINE_EXPORT NmMessageListModel : public QStandardItemModel

{

    Q_OBJECT

public:

    NmMessageListModel(

      NmDataManager &dataManager,

      QObject *parent = 0);

    virtual ~NmMessageListModel();

    QVariant data(const QModelIndex &index,

                  int role = Qt::DisplayRole) const;

    void refresh(

        const NmId mailboxId,

        const NmId folderId,

        const QList<NmMessageEnvelope*> &messageEnvelopeList);

    bool dividersActive();

    // This function is temporary, to be removed when

    // divider state can be modified with settings

    void setDividers(bool active);

    void setEnvelopeProperties(

        NmEnvelopeProperties property,

        const QList<NmId> &messageIds);

    NmId currentMailboxId();

public slots:

    void handleMessageEvent(

        NmMessageEvent event,

        const NmId &folderId,

        const QList<NmId> &messageIds);

private:

    bool messagesBelongUnderSameDivider(

        const NmMessageEnvelope *message1,

        const NmMessageEnvelope *message2) const;

    void insertDividerIntoModel(

        NmMessageEnvelope *messageForDivider,

        int parentRow);

    void insertMessageIntoModel(

        NmMessageEnvelope *messageEnvelope,

        int childRow,

        bool emitSignal);

    void insertNewMessageIntoModel(

        const NmId &mailboxId,

        const NmId &folderId,

        const NmId &msgId);

    int getInsertionIndex(

        const NmMessageEnvelope &envelope) const;

    int dividerInsertionIndex(int messageIndex);

    NmMessageListModelItem *createTitleDividerItem(NmMessageEnvelope *messageForDivider);

    NmMessageListModelItem *createMessageItem(NmMessageEnvelope *message);

    void removeMessageFromModel(const NmId &msgId);

    void removeItem(int row, NmMessageListModelItem &item);

    NmMessageListModelItem *itemFromModel(const NmId &messageId);

    bool changed(const NmMessageEnvelope &first, const NmMessageEnvelope &second);

    void updateMessageEnvelope(const NmId &mailboxId,

            const NmId &folderId,

            const NmId &msgId);

    void updateEnvelope(NmEnvelopeProperties property, const NmId &msgId);

signals:

    void setNewParam(NmUiStartParam *startParam);

private:

    NmDataManager &mDataManager;         // not owned

    bool mDividersActive;

    NmMessageListModelItem *mParentPtr;  // not owned

    NmId mCurrentMailboxId;

    NmId mCurrentFolderId;

};

#endif /* NMMESSAGELISTMODEL_H_*/