/**

   This file is part of CWRT package **

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

   This program 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, version 2.1 of the License. 

   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 

   (Lesser) General Public License for more details. You should have 

   received a copy of the GNU (Lesser) General Public License along 

   with this program. If not, see <http://www.gnu.org/licenses/>.

*/

#ifndef OMA2DOWNLOADBACKEND_H

#define OMA2DOWNLOADBACKEND_H

#include "dmcommon.h"

#include "dmcommoninternal.h"

#include "dmpimpl.h"

#include "downloadbackend.h"

// forward declarations

class OMA2DownloadBackendPrivate;

class DownloadCore;

class ClientDownload;

typedef QList<ClientDownload*> MediaDownloadList;

// class declaration

// concrete download implementation for OMA2 downloads

class OMA2DownloadBackend : public DownloadBackend

{

    Q_OBJECT

    DM_DECLARE_PRIVATE(OMA2DownloadBackend); // private implementation

public:

    OMA2DownloadBackend(DownloadCore *dlCore, ClientDownload *dl);

    ~OMA2DownloadBackend();

    // fetches the oma2 download attributes

    QVariant getAttribute(DownloadAttribute attr);

    // sets the oma2 download specific attributes

    int setAttribute(DownloadAttribute attr, const QVariant& value);

    // overloaded function for pausing the download

    int pause();

    // overloaded function for resuming paused download

    int resume();

    // overloaded function for cancelling the download

    int cancel();

    // overloaded function for getting child downloads

    void getChildren(QList<Download*>& list);

    // stores the data in storage

    void store(QByteArray data, bool lastChunk=false);

    // deletes the storage

    void deleteStore();

    // returns the size of stored data

    qint64 storedDataSize();

    // re-constructing all the values as part of persistent storage

    void init();

private slots:

    void bytesRecieved(qint64 bytesRecieved, qint64 bytesTotal);

    void handleFinished();    

    void bytesUploaded(qint64, qint64); 

private:

    // parses download descriptor

    bool parseDownloadDescriptor();

    // does the capability check on receiving DD

    bool checkDownloadDescriptor();

    // event handler

    bool event(QEvent *event);

    // suppress user confirmation

    bool suppressUserConfirmation();

    // handle status code

    void handleStatusCode(const int& statusCode);

    // handle precondition failed

    void handlePreconditionFailed();

    // adds the downloads to downloadList

    void addtoDownloadList(ClientDownload *dl);

    // finds the download for the given id

    ClientDownload* findDownload(int id);

    // posting the install notify event to the web server

    void postInstallNotifyEvent(const char* statusMessage);

    // verifying downloads by going through the MediaObject map and setting OMA2'S state at the end.

    void verifyDownloads();

    // returns current MediaObject index

    int currentIndex();

    // setting values in QSettings for persistent storage

    void serializeData(ClientDownload* dl, int index);

};

#endif