// Copyright (c) 2006-2009 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:

//

#include "csocketcontroller.h"

#include "csocket.h"

#include "csocketreader.h"

#include "csocketwriter.h"

#include "msocketcontrollerstore.h"

#include "mconnectionprefsprovider.h"

#include "imappaniccodes.h"

#include "imaptransportmanagercommon.h"

/**

The factory constructor. Ownership of the socket is transferred on calling 

the factory constructor.

@param	aSocket	The connected socket.

@return	A pointer to a fully constructed object.

*/

CSocketController* CSocketController::NewL(CSocket* aSocket, MConnectionPrefsProvider& aConnectionPrefsProvider)

	{

	// Ownership of socket has been transferred - place on cleanup stack.

	CleanupStack::PushL(aSocket);

	// Transfer ownership of the socket to the socket controller.

	CSocketController* self = new (ELeave) CSocketController(aSocket, aConnectionPrefsProvider);

	// Ownership of socket with the socket controller - pop-off the cleanup stack

	CleanupStack::Pop(aSocket);

	// Continue with initialisation of the socket controller

	CleanupStack::PushL(self);

	self->ConstructL();

	CleanupStack::Pop(self);

	return self;

	}

/**

Destructor.

*/

CSocketController::~CSocketController()

	{

	// Clean-up...

	delete iSocketReader;

	delete iSocketWriter;

	delete iSocket;

	}

/**

Constructor.

@param	aStore	The socket controller store.

@param	aSocket	The connected socket.

*/

CSocketController::CSocketController(CSocket* aSocket, MConnectionPrefsProvider& aConnectionPrefsProvider)

: CBase(), iSocket(aSocket), iConnectionPrefsProvider(aConnectionPrefsProvider)

	{

	__ASSERT_DEBUG( iSocket, User::Invariant() );

	}

/**

Second phase constructor. Initialises the object. Ownership of the connected

socket is passed to this class if this function completes.

*/

void CSocketController::ConstructL()

	{

	// Create the socket reader and writer

	// Writer is created (and added to AS) first so that it has a 'higher priority' in AS.

	// Must keep this order since it guarantees that we receive the acknowledgement of data being

	// sent out before receiving the response, which is something we rely on.

	iSocketWriter = CSocketWriter::NewL(*iSocket, *this);	

	iSocketReader = CSocketReader::NewL(*iSocket, *this);

	}

/**

Notifier that this object is now owned by the socket controller store.

@param	aStore	The socket controller store.

*/

void CSocketController::NotifyInStore(MSocketControllerStore& aStore)

	{

	iStore = &aStore;

	}

/**

The access function for the input stream.

@return	The input stream object.

*/

MInputStream& CSocketController::InputStream() const

	{

	return *iSocketReader;

	}

/**

The access function for the output stream.

@return	The output stream object.

*/

MOutputStream& CSocketController::OutputStream() const

	{

	return *iSocketWriter;

	}

/*

 *	Methods from MSocketController

 */

/**

@see MSocketController

*/

void CSocketController::StreamClosed(TInt aError, MSocketController::TStreamType aStreamType)

	{

	// Notify the other stream...

	switch( aStreamType )

		{

	case EInputStream:

		{

		// The input stream has closed the socket - inform the socket writer

		iSocketWriter->SocketClosed(aError);

		} break;

	case EOutputStream:

		{

		// The output stream has closed the socket - inform the socket reader

		iSocketReader->SocketClosed(aError);

		} break;

	default:

		User::Invariant();

		break;

		}

	// Both the input and output streams should be in the Closed state - this

	// socket controller is no longer useful.

	if( iStore )

		{

		// This socket controller is in the socket controller store - need to 

		// remove it from there.

		iStore->SocketControllerShutdown(*this);

		// This object is now ownerless - it should be deleted.

		delete this;

		}

	// This socket controller is not owned by the socket controller store - the

	// owner (probably the cleanup stack) will delete it.

	}

/**

@see MSocketController

*/

void CSocketController::StreamSuspended(MSocketController::TStreamType aSuspendedStream)

	{

	// Suspend the other stream...

	switch( aSuspendedStream )

		{

	case EInputStream:

		{

		// This is not supported yet!

		User::Invariant();

		} break;

	case EOutputStream:

		{

		// The output stream has suspended the socket - inform the socket reader

		iSocketReader->Suspend();

		} break;

	default:

		User::Invariant();

		break;

		}

	}

/**

@see MSocketController

*/

void CSocketController::StreamResumed(MSocketController::TStreamType aResumedStream)

	{

	// Resume the other stream...

	switch( aResumedStream )

		{

	case EInputStream:

		{

		// This is not supported yet!

		User::Invariant();

		} break;

	case EOutputStream:

		{

		// The output stream has resumed the socket - inform the socket reader

		iSocketReader->Resume();

		} break;

	default:

		User::Invariant();

		break;

		}

	}

/**

@see MSocketController

*/

#ifdef	_DEBUG

void CSocketController::ConnectionInfo(TDes8& aRemoteHost, TUint16& aRemotePort, TUint16& aLocalPort)

#else

void CSocketController::ConnectionInfo(TDes8& /*aRemoteHost*/, TUint16& /*aRemotePort*/, TUint16& /*aLocalPort*/)

#endif

	{

#ifdef _DEBUG

	__ASSERT_DEBUG( aRemoteHost.MaxLength() >= KIpv6MaxAddrSize, User::Invariant() );

	TInetAddr addr;

	iSocket->RemoteName(addr);

	TBuf<KIpv6MaxAddrSize> ip16bit;

	addr.Output(ip16bit);

	aRemoteHost.Copy(ip16bit);

	aRemotePort = static_cast<TUint16>(addr.Port());

	TInetAddr local;

	iSocket->LocalName(local);

	aLocalPort = static_cast<TUint16>(local.Port());

#else

	User::Invariant();

#endif

	}