/*

* 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:

*

*/

// User includes

#include "radioscannerengine_p.h"

#include "radioscannerengine.h"

#include "radiouiengine_p.h"

#include "radiouiengine.h"

#include "radiostationhandlerif.h"

#include "radioenginewrapper.h"

#include "radiostation.h"

#include "radiostationmodel.h"

/*!

 *

 * @param scanner

 * @param uiEngine

 */

RadioScannerEnginePrivate::RadioScannerEnginePrivate( RadioScannerEngine* scanner, RadioUiEnginePrivate& uiEngine ) :

    q_ptr( scanner ),

    mUiEngine( uiEngine ),

    mLastFoundFrequency( 0 ),

    mMutedByScanner( false ),

    mIsScanning( false )

{

    mUiEngine.wrapper().addObserver( this );

}

/*!

 *

 */

RadioScannerEnginePrivate::~RadioScannerEnginePrivate()

{

    mUiEngine.wrapper().removeObserver( this );

}

/*!

 * \reimp

 */

void RadioScannerEnginePrivate::tunedToFrequency( uint frequency, int reason )

{

    if ( !mIsScanning ) {

        return;

    }

    Q_Q( RadioScannerEngine );

    if ( reason == TuneReason::StationScanInitialization ) {

        mUiEngine.wrapper().startSeeking( Seek::Up, TuneReason::StationScan );

    } else if ( reason == TuneReason::StationScan ) {

        if ( frequency == mLastFoundFrequency ) {

            // Stop scanning

            q->emitStationFound( RadioStation() );

        } else if ( frequency > mLastFoundFrequency ) {

            // Station has been found normally

            mLastFoundFrequency = frequency;

            addFrequencyAndReport( frequency );

        } else if ( frequency == mUiEngine.api().minFrequency() ) {

            // Special case. A station has been found in the mininmum frequency

            addFrequencyAndReport( frequency );

        } else {

            // Seeking looped around the frequency band. Send invalid station as indicator that the scanning should stop

            q->emitStationFound( RadioStation() );

        }

    } else {

        q->emitStationFound( RadioStation() );

    }

}

/*!

 *

 */

void RadioScannerEnginePrivate::addFrequencyAndReport( const uint frequency )

{

    RadioStationModel& stationModel = mUiEngine.api().stationModel();

    stationModel.stationHandlerIf().addScannedFrequency( frequency );

    // Return value of findFrequency() is intentionally ignored. The station was just added

    // to the model in the previous line so it should be found and if it isn't then an

    // empty station is sent with the signal and scanner will stop the scanning process.

    RadioStation station;

    stationModel.findFrequency( frequency, station );

    Q_Q( RadioScannerEngine );

    q->emitStationFound( station );

}