/****************************************************************************

**

** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies).

** All rights reserved.

** Contact: Nokia Corporation (developer.feedback@nokia.com)

**

** This file is part of the HbCore module of the UI Extensions for Mobile.

**

** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this file.

** Please review the following information to ensure the GNU Lesser General

** Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights.  These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

**

** If you have questions regarding the use of this file, please contact

** Nokia at developer.feedback@nokia.com.

**

****************************************************************************/

#include <QByteArray>

#include <qlist.h>

#include <qdatastream.h>

#include <QVariantMap>

#include <hbdevicedialogtrace_p.h>

#include "hbdevicedialogsession_p.h"

#include "hbdevicedialogserversym_p_p.h"

#include "hbdevicedialogserverdefs_p.h"

#include "hbindicatorsessionhandler_p.h"

#include "hbdevicedialogserver_p.h"

#include <e32base.h>

/*!

    HbIndicatorSession

    \internal

*/

//stream operators for IndicatorQueueItem

QDataStream& operator << (QDataStream &outStream,

        const IndicatorQueueItem &obj)

{

    outStream << obj.state;

    outStream << obj.clientInfo;

    return outStream;

}

QDataStream& operator >> (QDataStream &inStream,

        IndicatorQueueItem &obj)

{

    int state;

    inStream >> state;

    obj.state = static_cast<IndicatorState>(state);

    inStream >> obj.clientInfo;

    return inStream;

}

/*!

    \internal

*/

HbIndicatorSessionHandler* HbIndicatorSessionHandler::NewL(

        HbDeviceDialogSession *aSession)

{

    TRACE_STATIC_ENTRY

    HbIndicatorSessionHandler* session =

        new (ELeave) HbIndicatorSessionHandler(aSession);

    TRACE_EXIT

    return session;

}

/*!

    \internal

*/

HbIndicatorSessionHandler::~HbIndicatorSessionHandler()

{

    TRACE_ENTRY

    Server().RemoveIndicatorHandlerFromList(this);

    TRACE_EXIT

}

/*!

    \internal

    Handles the servicing of a client request that has been passed

    to the server.

*/

void HbIndicatorSessionHandler::HandleMessageL( const RMessage2 &aMessage )

{

    TRACE_ENTRY

    switch( aMessage.Function() ) {

    case EHbSrvActivateIndicator: {

        ActivateIndicatorL( aMessage );

        break;

    }

    case EHbSrvDeactivateIndicator: {

        DeactivateIndicatorL( aMessage );

        break;

    }

    case EHbSrvGetActivatedIndicatorsStart: {

        iIndicatorQueue.clear();

        addToIndicatorQueue(Server().indicatorClientInfoList(),

                IndicatorActivated);

        iMsgType = EHbIndicatorAllActivated;

        IndicatorChannelRequestL( aMessage );

        break;

    }

    case EHbSrvGetActivatedIndicatorContinue: {

        if (iMsgType == -1) {

            iMsgType = EHbIndicatorUpdates;

        }

        IndicatorChannelRequestL( aMessage );

        break;

    }

    case EhbSrvGetActivatedIndicatorsClose: {

        Server().RemoveIndicatorHandlerFromList(this);

        if (iIndicatorChannelOpen) {

            iIndicatorChannelOpen = EFalse;

            iIndicatorChannel.Complete(KErrNone);

        }

        aMessage.Complete( KErrNone );

        break;

    }

    default: {

        break;

    }

    }; // end switch

    TRACE_EXIT

}

/*!

    \internal

    Called, when indicator(s) have been activated.

*/

void HbIndicatorSessionHandler::IndicatorsActivated(

        const QList<IndicatorClientInfo> &activated)

{

    TRACE_ENTRY

    addToIndicatorQueue(activated, IndicatorActivated);

    TRAP_IGNORE( WriteIndicatorInfoL() );

    TRACE_EXIT

}

void HbIndicatorSessionHandler::IndicatorsUpdated(

        const QList<IndicatorClientInfo> &updated)

{

    TRACE_ENTRY

    addToIndicatorQueue(updated, IndicatorUpdated);

    TRAP_IGNORE( WriteIndicatorInfoL() );

    TRACE_EXIT

}

/*!

    \internal

    Called, when indicator(s) have been deactivated.

*/

void HbIndicatorSessionHandler::IndicatorsDeactivated(

        const QList<IndicatorClientInfo> &deactivated)

{

    TRACE_ENTRY

    addToIndicatorQueue(deactivated, IndicatorDeactivated);

    TRAP_IGNORE( WriteIndicatorInfoL() );

    TRACE_EXIT

}

HbDeviceDialogServerPrivate& HbIndicatorSessionHandler::Server()

{

    return iSession->Server();

}

/*!

    \internal

    handle indicator activation.

*/

void HbIndicatorSessionHandler::ActivateIndicatorL( const RMessage2 &aMessage )

{

    TRACE_ENTRY

    QVariant parameter;

    QString type = indicatorTypeFromMessageL(aMessage, parameter);

    HbDeviceDialogServer::IndicatorParameters indicatorParameters(type, aMessage, parameter);

    TInt result = Server().activateIndicator(indicatorParameters);

    aMessage.Complete(result);

    TRACE_EXIT_ARGS("result: " << result)

}

/*!

    \internal

    handle indicator deactivation.

*/

void HbIndicatorSessionHandler::DeactivateIndicatorL( const RMessage2 &aMessage )

{

    TRACE_ENTRY

    QVariant parameter;

    QString type = indicatorTypeFromMessageL(aMessage, parameter);

    HbDeviceDialogServer::IndicatorParameters indicatorParameters(type, aMessage, parameter);

    TInt result = Server().deactivateIndicator(indicatorParameters);

    aMessage.Complete(result);

    TRACE_EXIT_ARGS("result: " << result)

}

void HbIndicatorSessionHandler::IndicatorChannelRequestL(

        const RMessage2 &aMessage )

{

    TRACE_ENTRY

    iIndicatorChannelOpen = ETrue;

    iIndicatorChannel = aMessage;

    TInt result = Server().AddIndicatorHandlerToList(this);

    if ( result != KErrNone ) {

        // Nothing to do if adding fails.

        iIndicatorChannel.Complete( result );

        iIndicatorChannelOpen = false;

        return;

    }

    WriteIndicatorInfoL();

    TRACE_EXIT

}

/*!

    \internal

    add client infos to queue, where they are sent to client.

*/

void HbIndicatorSessionHandler::addToIndicatorQueue(

        const QList<IndicatorClientInfo> &clientInfoList,

        IndicatorState state)

{

    foreach(const IndicatorClientInfo &clientInfo, clientInfoList) {

        iIndicatorQueue.append(IndicatorQueueItem(clientInfo, state));

    }

}

/*!

    \internal

    write indicator info from indicator queue to client.

*/

void HbIndicatorSessionHandler::WriteIndicatorInfoL()

{

    if ( iIndicatorChannelOpen ) {

        // Client is listening and ready to receive data

        if (iIndicatorQueue.count() > 0) {

            iIndicatorChannelOpen = EFalse;

            TPckgBuf<TInt> buf( iMsgType );

            TInt error = iIndicatorChannel.Write( KSlot1, buf );

            User::LeaveIfError( error );

            TInt leftOver = DoWriteIndicatorInfoL(error);

            if (leftOver >= 0) {

                //remove those, that were sent.

                iIndicatorQueue.erase(iIndicatorQueue.begin(),

                    iIndicatorQueue.begin()

                    + (iIndicatorQueue.count() - leftOver));

                if (iMsgType == EHbIndicatorAllActivated

                    && iIndicatorQueue.count() == 0) {

                        iMsgType = EHbIndicatorUpdates; //send only updates from now on.

                }

            }

            iIndicatorChannel.Complete( error );

        }

    }

}

/*!

    \internal

    helper function fo WriteIndicatorInfoL

*/

TInt HbIndicatorSessionHandler::DoWriteIndicatorInfoL(TInt &error)

{

    TRACE_ENTRY

    error = KErrNone;

    quint16 clientInfoCount = static_cast<quint16>(iIndicatorQueue.count());

    quint16 clientInfoStoreCount = 0;

    // Get client data buffer size.

    QByteArray array;

    TInt desSize = iIndicatorChannel.GetDesMaxLength( KSlot0 );

    if (desSize > sizeof(quint16) + 16) {

        //check, how many activated indicator infos will fit the size.

        QDataStream outStream(&array, QIODevice::WriteOnly);

        clientInfoStoreCount = clientInfoCount; //assume all fits.

        outStream << clientInfoCount;

        for(int i = 0; i < clientInfoCount; ++i) {

            outStream << iIndicatorQueue[i];

            if (array.size() > desSize) {

                clientInfoStoreCount = i; //can't fit all.

                break;

            }

        }

    }

    TBool hasLeftOver = ETrue;

    if (clientInfoStoreCount > 0) {

        hasLeftOver = EFalse;

        if (clientInfoStoreCount < clientInfoCount) {

            hasLeftOver = ETrue;

            // fill the buffer again with correct count.

            array.clear();

            QDataStream outStream(&array, QIODevice::WriteOnly);

            outStream << clientInfoStoreCount;

            for(int i = 0; i < clientInfoStoreCount; ++i) {

                outStream << iIndicatorQueue[i];

            }

        }

        //write data to message.

        TPtr8 ptr( reinterpret_cast<TUint8*>(array.data()),

                                             array.size(), array.size());

        error = iIndicatorChannel.Write( KSlot0, ptr );

        User::LeaveIfError( error );

    }

    if (hasLeftOver) {

        //not all infos fitted, calculate how much size is needed to get the rest.

        array.clear();

        QDataStream stream(&array, QIODevice::WriteOnly);

        stream << quint16(0);

        for (int i = clientInfoStoreCount; i < clientInfoCount; ++i) {

            stream << iIndicatorQueue[i];

        }

        // Complete with data length

        error = array.size();

    }

    TRACE_EXIT

    return clientInfoCount - clientInfoStoreCount;

}

/*!

    \internal

    get the indicator type and parameter from the message.

*/

QString HbIndicatorSessionHandler::indicatorTypeFromMessageL(const RMessage2 &aMessage,

		QVariant &parameter) const

{

    TRACE_ENTRY

    TInt dataSize = aMessage.GetDesLength( KSlot0 );

    HBufC8* data = HBufC8::NewLC( dataSize );

    TPtr8 ptr( data->Des() );

    aMessage.ReadL( KSlot0, ptr );

    QByteArray resArray( (const char*) ptr.Ptr(), ptr.Size() );

    QDataStream outStream( &resArray, QIODevice::ReadOnly );

    QString indicatorType;

    outStream >> indicatorType;

    outStream >> parameter;

    CleanupStack::PopAndDestroy( data );

    TRACE_EXIT

    return indicatorType;

}

/*!

    \internal

*/

HbIndicatorSessionHandler::HbIndicatorSessionHandler(

        HbDeviceDialogSession *aSession) : iSession(aSession), iMsgType(-1)

{

    TRACE_ENTRY

    TRACE_EXIT

}