/*

* Copyright (c) 2006-2008 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:  CSensorChannelBase class implementation.

*

*/

#include <sensrvchannel.h>

#include <sensrvchannelfinder.h>

#include "sensorchannelbase.h"

#include "sensortrace.h"

#include "sensorsourcecontextdef.h"

#include "sensorsourceclient.h"

#include "sensorsourcecommand.h"

// CONSTANTS

#ifdef _DEBUG

// Converts channel id in to descriptor format

_LIT( KChannelNameDoubleTap, "DoubleTap" );

_LIT( KChannelNameOrientation, "Orientation" );

LOCAL_C const TDesC& ChannelName( CSensorChannelBase::TSensorChannelId aId )

    {

    switch( aId )

        {

        case CSensorChannelBase::EChannelDoubleTap:

            {

            return KChannelNameDoubleTap;

            }

        case CSensorChannelBase::EChannelOrientation:

            {

            return KChannelNameOrientation;

            }

        default:

            {

            return KNullDesC;

            }

        }

    }

// Converts state id in to descriptor format

_LIT( KChannelStateIdle, "Idle" );

_LIT( KChannelStateInit, "Initializing" );

_LIT( KChannelStateActive, "Active" );

LOCAL_C const TDesC& ChannelStateName(

    CSensorChannelBase::TSensorChannelState aState )

    {

    switch( aState )

        {

        case CSensorChannelBase::EChannelStateIdle:

            {

            return KChannelStateIdle;

            }

        case CSensorChannelBase::EChannelStateInitializing:

            {

            return KChannelStateInit;

            }

        case CSensorChannelBase::EChannelStateActive:

            {

            return KChannelStateActive;

            }

        default:

            {

            return KNullDesC;

            }

        }

    }

#endif

// Default sample rates

const TInt KMinSampleRate = 1;

const TInt KMaxSampleRate = 1;

const TInt KBufferRate = 0;

// Destructor

CSensorChannelBase::~CSensorChannelBase()

    {

    FUNC_LOG;

    iClients.ResetAndDestroy();

    delete iContext;

    if( iSensorChannel )

        {

        iSensorChannel->CloseChannel();

        delete iSensorChannel;

        }

    }

// Constructor

CSensorChannelBase::CSensorChannelBase(

    MCFContextInterface& aCF,

    TSensorChannelId aSensorChannel ):

    iChannelId( aSensorChannel ),

    iCF( aCF )

    {

    FUNC_LOG;

    }

// 2nd phase constructor

void CSensorChannelBase::BaseConstructL( const TSensrvChannelInfo& aChannelInfo )

    {

    FUNC_LOG;

    iSensorChannel = CSensrvChannel::NewL( aChannelInfo );

    iContext = CCFContextObject::NewL();

    INFO_1( "Created sensor channel: [%S]", &ChannelName( iChannelId ) );

    ChangeState( EChannelStateIdle );

    }

// METHODS

//-----------------------------------------------------------------------------

// CSensorChannelBase::StartListeningL

//-----------------------------------------------------------------------------

//

void CSensorChannelBase::StartListeningL()

    {

    FUNC_LOG;

    // If we do not have active connections and the channel is currently in

    // idle mode

    if( iState == EChannelStateIdle )

        {

        DoStartL( EChannelStateActive );

        }

    }

//-----------------------------------------------------------------------------

// CSensorChannelBase::StopListening

//-----------------------------------------------------------------------------

//

void CSensorChannelBase::StopListening()

    {

    FUNC_LOG;

    // Check if the channel needs to be closed

    if( iState == EChannelStateActive )

        {

        DoStop();

        }

    }

//------------------------------------------------------------------------------

// CSensorChannelBase::FetchInitialValueL

//------------------------------------------------------------------------------

//

void CSensorChannelBase::FetchInitialValueL()

    {

    FUNC_LOG;

    DoStartL( EChannelStateInitializing );

    }

//------------------------------------------------------------------------------

// CSensorChannelBase::HandleSensorCommandL

//------------------------------------------------------------------------------

//

void CSensorChannelBase::HandleSensorCommandL(

    const CSensorSourceCommand& aCommand )

    {

    FUNC_LOG;

    TPtrC commandId( aCommand.CommandId() );

    // activate

    if( commandId.CompareF( KSensorCommandIdActivateName )

        == KErrNone )

        {

        HandleActivateCommandL( aCommand );

        INFO_1( "Handled sensor source command: [%S]", &(const TDesC&)aCommand.CommandId() );

        }

    // deactivate

    else if( commandId.CompareF( KSensorCommandIdDeactivateName )

        == KErrNone )

        {

        HandleDeactivateCommandL( aCommand );

        INFO_1( "Handled sensor source command: [%S]", &(const TDesC&)aCommand.CommandId() );

        }

    // unknown command

    else

        {

        ERROR_1( KErrNotSupported, "Unknown sensor source command: [%S]",

            &commandId );

        }

    }

//-----------------------------------------------------------------------------

// CSensorChannelBase::SensorChannelId

//-----------------------------------------------------------------------------

//

CSensorChannelBase::TSensorChannelId CSensorChannelBase::SensorChannelId() const

    {

    FUNC_LOG;

    return iChannelId;

    }

//------------------------------------------------------------------------------

// CSensorChannelBase::SensorActive

//------------------------------------------------------------------------------

//

TBool CSensorChannelBase::SensorActive() const

    {

    FUNC_LOG;

    INFO_1( "SensorActive(): active clients [%d]", iClients.Count() );

    return ( iClients.Count() > 0 );

    }

//-----------------------------------------------------------------------------

// CSensorChannelBase::DataReceived

//-----------------------------------------------------------------------------

//

void CSensorChannelBase::DataReceived( CSensrvChannel& aChannel,

    TInt aCount,

    TInt aDataLost )

    {

    FUNC_LOG;

    // If we are fetching initial value, make sure that the channel is closed

    // properly if there are no active connections

    if( !SensorActive() && iState == EChannelStateInitializing )

        {

        // Stop data listening and close up channel

        DoStop();

        }

    else

        {

        // Active connections received, change state

        ChangeState( EChannelStateActive );

        }

    }

//-----------------------------------------------------------------------------

// CSensorChannelBase::DataError

//-----------------------------------------------------------------------------

//

void CSensorChannelBase::DataError( CSensrvChannel& /*aChannel*/,

    TSensrvErrorSeverity aError )

    {

    FUNC_LOG;

    ChangeState( EChannelStateIdle );

    if( aError == ESensrvErrorSeverityFatal )

        {

        DoReopenChannel();

        }

    }

//-----------------------------------------------------------------------------

// CSensorChannelBase::GetDataListenerInterfaceL

//-----------------------------------------------------------------------------

//

void CSensorChannelBase::GetDataListenerInterfaceL( TUid /*aInterfaceUid*/,

        TAny*& aInterface )

    {

    aInterface = NULL;

    }

//-----------------------------------------------------------------------------

// CSensorChannelBase::FindChannelL

//-----------------------------------------------------------------------------

//

TBool CSensorChannelBase::FindChannelL(

    const TSensrvChannelTypeId& aChannelTypeId,

    const TDesC8& aLocation,

    const TDesC8& aVendorId,

    TSensrvChannelInfo& aChannelInfo )

    {

    FUNC_LOG;

    TBool found = EFalse;

    // Configure channel

    CSensrvChannelFinder* channelFinder = CSensrvChannelFinder::NewLC();

    RSensrvChannelInfoList channelInfoList;

    CleanupClosePushL( channelInfoList );

    // Find double tap channel

    aChannelInfo.iChannelId = 0;

    aChannelInfo.iContextType = ESensrvContextTypeNotDefined;

    aChannelInfo.iQuantity = ESensrvQuantityNotdefined;

    aChannelInfo.iChannelType = aChannelTypeId;

    aChannelInfo.iLocation = aLocation;

    aChannelInfo.iVendorId = aVendorId;

    aChannelInfo.iDataItemSize = 0;

    channelFinder->FindChannelsL( channelInfoList, aChannelInfo );

    if( channelInfoList.Count() )

        {

        // Take first match and assume it to be best one

        aChannelInfo = channelInfoList[0];

        found = ETrue;

        INFO_3( "Found sensor channel with parameters: ChannelTypeId: [%x], Location: [%S], Vendor: [%S]",

             aChannelTypeId, &aLocation, &aVendorId );

        }

    else

        {

        ERROR_3( KErrNotFound, "Did not found sensor channel: ChannelTypeId: [%x], Location: [%S], Vendor: [%S]",

             aChannelTypeId,

             &aLocation,

             &aVendorId );

        }

    // Cleanup

    CleanupStack::PopAndDestroy( 2, channelFinder );

    return found;

    }

//-----------------------------------------------------------------------------

// CSensorChannelBase::DoReopenChannel

//-----------------------------------------------------------------------------

//

void CSensorChannelBase::DoReopenChannel()

    {

    FUNC_LOG;

    delete iSensorChannel;

    iSensorChannel = NULL;

    TRAP_IGNORE( StartListeningL() );

    }

//------------------------------------------------------------------------------

// CSensorChannelBase::ChangeState

//------------------------------------------------------------------------------

//

void CSensorChannelBase::ChangeState( TSensorChannelState aState )

    {

    FUNC_LOG;

    if( aState != iState )

        {

        INFO_3( "Sensor channel [%S] changed state: [%S] -> [%S]",

            &ChannelName( iChannelId ),

            &ChannelStateName( iState ),

            &ChannelStateName( aState ) );

        iState = aState;

        }

    }

//------------------------------------------------------------------------------

// CSensorChannelBase::SearchCommandByFeatureId

//------------------------------------------------------------------------------

//

TInt CSensorChannelBase::SearchCommandByFeatureId( const TPtrC& aFeatureId ) const

    {

    FUNC_LOG;

    TInt ret = KErrNotFound;

    for( TInt i = 0; i < iClients.Count(); i++ )

        {

        CSensorSourceClient* client = iClients[i];

        if( client->iFeatureId.CompareF( aFeatureId ) == KErrNone )

            {

            ret = i;

            break;

            }

        }

    return ret;

    }

//------------------------------------------------------------------------------

// CSensorChannelBase::SearchCommandBySid

//------------------------------------------------------------------------------

//

TInt CSensorChannelBase::SearchCommandBySid( const TSecureId& aSid ) const

    {

    FUNC_LOG;

    TInt ret = KErrNotFound;

    for( TInt i = 0; i < iClients.Count(); i++ )

        {

        CSensorSourceClient* client = iClients[i];

        if( client->iSid == aSid )

            {

            ret = i;

            break;

            }

        }

    return ret;

    }

//------------------------------------------------------------------------------

// CSensorChannelBase::SearchCommandByScriptId

//------------------------------------------------------------------------------

//

TInt CSensorChannelBase::SearchCommandByScriptId( TInt aScriptId ) const

    {

    FUNC_LOG;

    TInt ret = KErrNotFound;

    for( TInt i = 0; i < iClients.Count(); i++ )

        {

        CSensorSourceClient* client = iClients[i];

        if( client->iScriptId == aScriptId )

            {

            ret = i;

            break;

            }

        }

    return ret;

    }

//------------------------------------------------------------------------------

// CSensorChannelBase::DoStartL

//------------------------------------------------------------------------------

//

void CSensorChannelBase::DoStartL( TSensorChannelState aState )

    {

    FUNC_LOG;

    // If we have not connected to channel, connect

    if( !iSensorChannel )

        {

        iSensorChannel = CSensrvChannel::NewL( iChannelInfo );

        }

    iSensorChannel->OpenChannelL();

    INFO_1( "Opened sensor channel: [%S]", &ChannelName( iChannelId ) );

    iSensorChannel->StartDataListeningL( this,

        KMinSampleRate, KMaxSampleRate, KBufferRate );

    INFO_1( "Started sensor data listening: [%S]", &ChannelName( iChannelId ) );

    ChangeState( aState );

    }

//------------------------------------------------------------------------------

// CSensorChannelBase::DoStop

//------------------------------------------------------------------------------

//

void CSensorChannelBase::DoStop()

    {

    FUNC_LOG;

    if( iSensorChannel )

        {

        iSensorChannel->StopDataListening();

        INFO_1( "Stopped sensor data listening: [%S]", &ChannelName( iChannelId ) );

        iSensorChannel->CloseChannel();

        INFO_1( "Closed sensor channel: [%S]", &ChannelName( iChannelId ) );

        ChangeState( EChannelStateIdle );

        }

    }

//------------------------------------------------------------------------------

// CSensorChannelBase::HandleActivateCommandL

//------------------------------------------------------------------------------

//

void CSensorChannelBase::HandleActivateCommandL(

    const CSensorSourceCommand& aCommand )

    {

    FUNC_LOG;

    // First check the feature id

    if( aCommand.FeatureId().Length() )

        {

        // Check if the feature already has activated the sensors

        if( SearchCommandByFeatureId( aCommand.FeatureId() ) == KErrNotFound )

            {

            // Activate sensor channel for this feature

            CSensorSourceClient* client = CSensorSourceClient::NewLC(

                aCommand.SecureId(), aCommand.ScriptId(), aCommand.FeatureId() );

            AddClientL( client );

            CleanupStack::Pop( client );

            INFO_2( "Sensor channel: [%S] activated by feature: [%S]",

                &ChannelName( iChannelId ), &(const TDesC&)aCommand.FeatureId() );

            }

        else

            {

            INFO_2( "Sensor channel: [%S] already activated by feature: [%S]",

                &ChannelName( iChannelId ), &(const TDesC&)aCommand.FeatureId() );

            }

        }

    // Check the script id

    else if( aCommand.ScriptId() != KErrNotFound )

        {

        // Check if the script id already has activated the sensors

        if( SearchCommandByScriptId( aCommand.ScriptId() ) == KErrNotFound )

            {

            // Activate sensor for this script

            CSensorSourceClient* client = CSensorSourceClient::NewLC(

                aCommand.SecureId(), aCommand.ScriptId(), aCommand.FeatureId() );

            AddClientL( client );

            CleanupStack::Pop( client );

            INFO_2( "Sensor channel: [%S] activated by script id: [%d]",

                &ChannelName( iChannelId ), aCommand.ScriptId() );

            }

        else

            {

            INFO_2( "Sensor channel: [%S] already activated by script id: [%d]",

                &ChannelName( iChannelId ), aCommand.ScriptId() );

            }

        }

    // Check the SID

    else

        {

        // Check if the script id already has activated the sensors

        if( SearchCommandBySid( aCommand.SecureId() ) == KErrNotFound )

            {

            // Activate sensor for this Sid

            CSensorSourceClient* client = CSensorSourceClient::NewLC(

                aCommand.SecureId(), aCommand.ScriptId(), aCommand.FeatureId() );