/*

 * Copyright (c) 2009 - 2010 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: 

 *

 */

#include "nmapiheaders.h"

namespace EmailClientApi

{

const quint32 IntervalEmitingSignals = 10000;

/*!

   Constructor

 */

NmApiEventNotifierPrivate::NmApiEventNotifierPrivate(QObject *parent) :

    QObject(parent), mEmitSignals(NULL), mEngine(NULL), mIsRunning(false)

{

    NM_FUNCTION;

    mEmitSignals = new QTimer(this);

    mEmitSignals->setInterval(IntervalEmitingSignals);

    connect(mEmitSignals, SIGNAL(timeout()), this, SIGNAL(

        timedOut()));

    mEngine = NmApiEngine::instance();

}

/*!

   Destructor

 */

NmApiEventNotifierPrivate::~NmApiEventNotifierPrivate()

{

    NM_FUNCTION;

    mEmitSignals->stop();

    NmApiEngine::releaseInstance(mEngine);

}

/*!

   Returns true if the 

 */

bool NmApiEventNotifierPrivate::isRunning() const

{

    return mIsRunning;

}

/*!

   Start monitoring email events

   \return Value tells about monitoring system running

 */

bool NmApiEventNotifierPrivate::start()

{

    NM_FUNCTION;

    bool result(false);

    if (mIsRunning) {

        result = true;

    }

    else {

        qRegisterMetaType<QList<quint64> > ("QList<quint64>");

        qRegisterMetaType<NmApiMessage> ("NmApiMessage");

        connect(mEngine, SIGNAL(emailStoreEvent(NmApiMessage)), this,

                SLOT(emailStoreEvent(NmApiMessage)));

        mEngine->startCollectingEvents();

        mEmitSignals->start();

        mIsRunning = true;

        result = true;

    }

    return result;

}

/*!

   \brief Stop listening events.

 */

void NmApiEventNotifierPrivate::stop()

{

    mIsRunning = false;

    mEmitSignals->stop();

    disconnect(mEngine, SIGNAL(emailStoreEvent(NmApiMessage)), this,

            SLOT(emailStoreEvent(NmApiMessage)));

}

/*!

    Returns event buffer, after function call the buffer is empty

 */

void NmApiEventNotifierPrivate::events(QList<NmApiMessage> &events)

{

    while (!mBufferOfEvents.isEmpty()) {

        events << mBufferOfEvents.takeFirst();

    }

}

/*!

   Add one email event into buffer.

   It is run by \sa NmApiEngine::emailStoreEvent signal.

   \sa NmApiMessage

   \param events It contains full info about object and it event.

 */

void NmApiEventNotifierPrivate::emailStoreEvent(const NmApiMessage &events)

{

    NM_FUNCTION;

    mBufferOfEvents << events;

}

void NmApiEventNotifierPrivate::cancel()

{

    NM_FUNCTION;

    if (!mIsRunning) {

        return;

    }

    mIsRunning = false;

    mEmitSignals->stop();

    disconnect(mEngine, SIGNAL(emailStoreEvent(NmApiMessage)), this,

            SLOT(emailStoreEvent(NmApiMessage)));

    mBufferOfEvents.clear();

}

}