/*

* Copyright (c) 2007 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:  Extension to lockapp clients.

 *

*/

#include "lockaccessextension.h"

#include <lockappclientserver.h>

#include <e32property.h> // P&S API

#include <apgtask.h> // TApaTask, TApaTaskList

#include <coemain.h> // CCoeEnv

// Constants

const TInt KTimesToConnectServer( 2);

const TInt KTimeoutBeforeRetrying( 50000);

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

// Gets server version, needed for connection

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

TVersion RLockAccessExtension::GetVersion( )

	{

	return TVersion( KLockAppServMajorVersion, KLockAppServMinorVersion, KLockAppServBuildVersion );

	}

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

// Connects client to lockapp application server

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

TInt RLockAccessExtension::TryConnect( RWsSession& aWsSession )

	{

	TInt ret(KErrNone);

	TApaTaskList list(aWsSession);

	// check that lockapp is running

	TApaTask task = list.FindApp( KLockAppUid );

	if ( task.Exists( ) )

		{

		if ( Handle( )== NULL )

			{

			// connect session to the server

			ret = CreateSession( KLockAppServerName, GetVersion( ) );

			}

		else

			{

			// not CreateSession because Handle( ) not NULL

			}

		}

	else

		{

		// LockApp task not found

		RDebug::Printf( "%s %s (%u) ???? LockApp task not found=%x", __FILE__, __PRETTY_FUNCTION__, __LINE__, KLockAppUid );

		ret = KErrNotReady;

		}

	return ret;

	}

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

// Ensures that the connection to the service is alive.

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

TInt RLockAccessExtension::EnsureConnected( )

	{

	TInt ret(KErrNone);

	// we need CCoeEnv because of window group list

	CCoeEnv* coeEnv = CCoeEnv::Static( );

	if ( coeEnv )

		{

		// All server connections are tried to be made KTriesToConnectServer times because

		// occasional fails on connections are possible at least on some servers

		TInt retry(0);

		while ( (ret = TryConnect( coeEnv->WsSession( ) ) ) != KErrNone && 

				(retry++) <= KTimesToConnectServer )

			{

			User::After( KTimeoutBeforeRetrying );

			}

		// the connection state gets returned

		}

	else

		{

		// No CCoeEnv

		ret = KErrNotSupported;

		}

	return ret;

	}

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

// Sends blind message to lockapp if the session is connected.

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

TInt RLockAccessExtension::SendMessage( TInt aMessage )

	{

	TInt ret = EnsureConnected( );

	if ( ret == KErrNone )

		{

		ret = SendReceive( aMessage );

		}

	return ret;

	}

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

// Sends blind message to lockapp if the session is connected.

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

TInt RLockAccessExtension::SendMessage( TInt aMessage, TInt aParam1 )

	{

	TInt ret = EnsureConnected( );

	if ( ret == KErrNone )

		{

		// assign parameters to IPC argument

		TIpcArgs args(aParam1);

		ret = SendReceive( aMessage, args );

		}

	return ret;

	}

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

// Sends blind message to lockapp if the session is connected.

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

TInt RLockAccessExtension::SendMessage( TInt aMessage, TInt aParam1, TInt aParam2 )

	{

	TInt ret = EnsureConnected( );

	if ( ret == KErrNone )

		{

		// assign parameters to IPC argument

		TIpcArgs args( aParam1, aParam2);

		ret = SendReceive( aMessage, args );

		}

	return ret;

	}

// End of File