/*

* Copyright (c) 2006 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:  Helper class implementation for performing device discovery.

*

*/

#include "btengdevicesearch.h"

#include "btengdiscovery.h"

#include "debug.h"

/**

 * the request ID for device search using RNotifer.

 */

const TInt KDevSearchAoReqId = 40;

/*

 * the request ID for EIR service uuids using host resolver

 */

const TInt KDevEirServiceListAoReqId = 41;

// ======== MEMBER FUNCTIONS ========

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

// C++ default constructor

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

//

CBTEngDeviceSearch::CBTEngDeviceSearch()

    {

    }

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

// Symbian 2nd-phase constructor

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

//

void CBTEngDeviceSearch::ConstructL()

    {

    User::LeaveIfError( iNotifier.Connect() );

    iActive = CBTEngActive::NewL( *this, KDevSearchAoReqId, 

                                   CActive::EPriorityStandard );

    }

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

// NewL

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

//

CBTEngDeviceSearch* CBTEngDeviceSearch::NewL()

    {

    CBTEngDeviceSearch* self = new( ELeave ) CBTEngDeviceSearch();

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// Destructor

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

//

CBTEngDeviceSearch::~CBTEngDeviceSearch()

    {

    delete iActive;

    iNotifier.Close();

    iHostResolver.Close();

    iSocketServer.Close();

    }

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

// Start the device discovery notifier.

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

//

TInt CBTEngDeviceSearch::StartSearch( CBTDevice* aDevice, TNameEntry* aNameEntry,

    const TBTDeviceClass& aDeviceClass, MBTEngSdpResultReceiver* aNotifier )

    {

    TRACE_FUNC_ENTRY

    TInt err ( KErrNone );

    if( iActive->IsActive() )

        {

        err = KErrInUse;

        }

    if( !err && !iNotifier.Handle() )

        {

        err = iNotifier.Connect();

        }

    if( !err )

        {

        iClientReq = EDeviceSearch;

        iResultNotifier = aNotifier;

        iNameEntry = aNameEntry;

        iDevice = aDevice;

            // Selection parameters

        TBTDeviceSelectionParams params;

        params.SetDeviceClass( aDeviceClass );

        iSelectionPckg = TBTDeviceSelectionParamsPckg( params );

            // Response parameters

        TBTDeviceResponseParams result;

        iResponsePckg = TBTDeviceResponseParamsPckg( result );

        iActive->SetRequestId( KDevSearchAoReqId );

        iNotifier.StartNotifierAndGetResponse( iActive->RequestStatus(), 

                                                KDeviceSelectionNotifierUid, 

                                                iSelectionPckg, iResponsePckg );

        iActive->GoActive();

        }

    TRACE_FUNC_EXIT

    return err;

    }

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

// Cancel an ongoing device discovery.

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

//

void CBTEngDeviceSearch::CancelSearch()

    {

    TRACE_FUNC_ENTRY

    if( iActive->IsActive() && iClientReq == EDeviceSearch)

        {

        iActive->Cancel();

        if (iActive->RequestId() == KDevSearchAoReqId)

            {

            iNotifier.Close();

            NotifyClient(KErrAbort);

            }

        else if (iActive->RequestId() == KDevEirServiceListAoReqId)

            {

            iHostResolver.Close();

            }

        }

    TRACE_FUNC_EXIT

    }

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

// Get cached EIR data from host resolver and extract service uuids

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

//

TInt CBTEngDeviceSearch::GetEirServiceUUIDs( const TBTDevAddr& aAddr, 

        TNameEntry* aNameEntry, MBTEngSdpResultReceiver* aNotifier)

    {

    TRACE_FUNC_ENTRY

    TInt err = KErrNone;

    if( iActive->IsActive() )

        {

        err = KErrInUse;

        }

    if (!err)

        {

        iClientReq = EGetDeviceEir;

        iResultNotifier = aNotifier;

        iNameEntry = aNameEntry;

        err = DoGetDeviceEir(aAddr);

        }

    TRACE_FUNC_EXIT

    return err;

    }

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

// Cancel an ongoing EIR services retieval.

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

//

void CBTEngDeviceSearch::CancelGetEirServiceUUIDs()

    {

    TRACE_FUNC_ENTRY

    if( iActive->IsActive() && iClientReq == EGetDeviceEir)

        {

        iActive->Cancel();

        iHostResolver.Close();

        }

    TRACE_FUNC_EXIT

    }

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

// From class MBTEngActiveObserver.

// Callback to notify that an outstanding request has completed.

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

//

void CBTEngDeviceSearch::RequestCompletedL( CBTEngActive* aActive, 

    TInt aStatus )

    {

    TRACE_FUNC_ARG( ( _L( "status: %d") , aStatus ) )

    (void) aActive;

    if ( aActive->RequestId() == KDevSearchAoReqId )

        {

        HandleDeviceSelectionResultL(aStatus);

        }

    else if ( aActive->RequestId() == KDevEirServiceListAoReqId )

        {

        HandleDeviceEirDataResult( aStatus );

        }

    TRACE_FUNC_EXIT

    }

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

// From class MBTEngActiveObserver.

// Handles cancelation of an outstanding request

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

//

void CBTEngDeviceSearch::CancelRequest( TInt aRequestId )

    {

    TRACE_FUNC_ARG( ( _L( "reqID %d" ), aRequestId ) )

    if ( aRequestId == KDevSearchAoReqId )

        {

        iNotifier.CancelNotifier( KDeviceSelectionNotifierUid );

        }

    else if ( aRequestId == KDevEirServiceListAoReqId )

        {

        iHostResolver.Cancel();

        }

    TRACE_FUNC_EXIT 

    }

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

// From class MBTEngActiveObserver.

// Callback to notify that an error has occurred in RunL.

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

//

void CBTEngDeviceSearch::HandleError( CBTEngActive* aActive, 

    TInt aError )

    {

    TRACE_FUNC_ARG( ( _L( "error: %d") , aError ) )

    (void) aActive;

    iNotifier.Close();

    iHostResolver.Close();

    NotifyClient(aError);

    }

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

// get device eir from cache

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

//

TInt CBTEngDeviceSearch::DoGetDeviceEir(const TBTDevAddr& aAddr)

    {

    TRACE_FUNC_ENTRY

    TInt err (KErrNone);

    if (!iSocketServer.Handle())

        {

        err = iSocketServer.Connect();

        }

    TProtocolDesc pInfo;

    if (!err)

        {

        _LIT(KBTLinkManagerProtocol, "BTLinkManager");

        err =  iSocketServer.FindProtocol( KBTLinkManagerProtocol(), pInfo );

        }

    if (!err)

        {

        err = iHostResolver.Open(iSocketServer, pInfo.iAddrFamily, pInfo.iProtocol);

        }

    if( !err )

        {

        iInquirySockAddr = TInquirySockAddr();

        iInquirySockAddr.SetBTAddr(aAddr );

        iInquirySockAddr.SetAction( KHostResCache );

        iActive->SetRequestId( KDevEirServiceListAoReqId );

        iHostResolver.GetByAddress( iInquirySockAddr, *iNameEntry, iActive->RequestStatus() );

        iActive->GoActive();

        }

    TRACE_FUNC_EXIT

    return err;

    }

void CBTEngDeviceSearch::HandleDeviceSelectionResultL(TInt aErr)

    {

    TRACE_FUNC_ENTRY

    TInt err (aErr);

    iNotifier.Close();

    if (!err)

        {

        // Copy information to returned device

        iDevice->SetDeviceAddress( iResponsePckg().BDAddr() );

        iDevice->SetDeviceNameL( BTDeviceNameConverter::ToUTF8L( 

                                                iResponsePckg().DeviceName() ) );

        iDevice->SetDeviceClass( iResponsePckg().DeviceClass() );  

        }

    if (!err && iNameEntry)

        {

        err = DoGetDeviceEir(iResponsePckg().BDAddr());

        }

    // if an error happens, or the caller doesn't need the EIR part, complete

    // the request. Otherwise the client will be called after getting EIR 

    // completes.

    if (err || !iNameEntry)

        {

        NotifyClient(err);

        }

    TRACE_FUNC_EXIT

    }

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

// extracting service uuids from the device EIR data returned by host resolver

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

//

void CBTEngDeviceSearch::HandleDeviceEirDataResult(TInt aErr)

    {

    TRACE_FUNC_ENTRY

    iHostResolver.Close();

    if ( iClientReq == EDeviceSearch)

        {

        // Device search has already completed correctly, so 

        // we don't pass GetEir error 

        NotifyClient( KErrNone );

        }

    else

        {

        NotifyClient( aErr );

        }

    TRACE_FUNC_EXIT

    }

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

// Callback to notify that the caller's request has completed.

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

//

void CBTEngDeviceSearch::NotifyClient(TInt aErr)

    {

    TRACE_FUNC_ENTRY

    if( iResultNotifier && iClientReq == EDeviceSearch)

        {

        if (iNameEntry)

            {

            iResultNotifier->DeviceSearchComplete( iDevice, iNameEntry, aErr );

            }

        else

            {

            iResultNotifier->DeviceSearchComplete( iDevice, aErr );

            }

        }

    if (iResultNotifier && iClientReq == EGetDeviceEir)

        {

        iResultNotifier->GetEirServiceUUIDsComplete(iNameEntry, aErr);

        }

    TRACE_FUNC_EXIT

    }