/*

* Copyright (c) 2007-2009 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:  A Context Engine Plug-in to get location context information.

*

*/

#include <e32std.h>

#include <uri16.h>

#include <e32math.h>

#include <lbsposition.h> 

#include <etel3rdparty.h>

#include "locationcontextplugin.h"

#include "mdenamespacedef.h"

#include "mdeobject.h"

#include "mdeharvestersession.h"

#include "mdeproperty.h"

#include "harvesterlog.h"

#include "mdsutils.h"

#include "mdeconstants.h"

#include "mdeobjectdef.h"

#include "harvesterdata.h"

using namespace MdeConstants;

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

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

// Default constructor for first phase construction.

// Don't export these - used only by functions in this DLL, eg our NewL().

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

//

CLocationContextPlugin::CLocationContextPlugin() :

    iObserver( NULL ), iMdeSession( NULL ), iLocationTrailConnected( EFalse )

    {

    }

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

// Second phase construction

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

//

void CLocationContextPlugin::ConstructL() // second-phase constructor

    {

    // No implementation required

    }

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

// The usual NewL()

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

//

CLocationContextPlugin* CLocationContextPlugin::NewL()

    {

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

    CleanupStack::PushL( self );

    self->ConstructL();

    CleanupStack::Pop( self );

    return self;

    }

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

// Destructor

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

//

CLocationContextPlugin::~CLocationContextPlugin()

    {

    iLocationTrail.Close();

    iManipulator.Close();

    }

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

// From CContextPlugin.

// Initialization of Location Context Plugin.

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

//

void CLocationContextPlugin::Init( MContextPluginObserver& aObserver )

    {

    WRITELOG("CLocationContextPlugin::Init()");

    TInt err = iLocationTrail.Connect();

    if ( err == KErrNone )

    	{

    	err = iManipulator.Connect();

    	if (err == KErrNone)

    		{

    		iLocationTrailConnected = ETrue;

    		}

    	}

    else

    	{

    	iLocationTrailConnected = EFalse;

    	}

    aObserver.PluginInitializationStatus( KErrNone ); // notify the context framework

    }

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

// Set a pointer to MdESession.

// Session is used to store harvested context data.

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

//

void CLocationContextPlugin::SetMdeSession( CMdESession& aSession )

    {

    iMdeSession = &aSession;

    }

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

// From CContextPlugin.

// This method takes a location context snapshot for one metadata object

// and writes the information to the object received as parameter.

// The observer will be informed about the status of the operation.

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

//

void CLocationContextPlugin::ContextSnapshot( MContextPluginObserver& aObserver,

	CHarvesterData& aHD )

    {

    WRITELOG( "CLocationContextPlugin::ContextSnapshot()" );

    if( !aHD.AddLocation() )

    	{

        WRITELOG( "CLocationContextPlugin::ContextSnapshot() - aHd.AddLocation returned false" );

    	aHD.SetErrorCode( KErrNone );

        aObserver.PluginSnapshotStatus( &aHD );

    	return;

    	}

    if ( !iLocationTrailConnected ) // no trail, no snapshot

    	{

    	aHD.SetErrorCode( KErrDisconnected );

        aObserver.PluginSnapshotStatus( &aHD );

    	return;

    	}

    TInt ret = KErrNone;

    ret = iManipulator.LocationSnapshot( aHD.MdeObject().Id() );

    aHD.SetErrorCode( ret );

    aObserver.PluginSnapshotStatus( &aHD );

    }

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

// From CContextPlugin.

// This method takes a location context snapshot for several metadata objects

// and writes the information to the all the objects received as parameter.

// The observer will be informed about the status of the operation.

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

//

void CLocationContextPlugin::ContextSnapshot( MContextPluginObserver& aObserver,

    RPointerArray<CHarvesterData>& aHDArray )

    {

	const TInt count( aHDArray.Count() );

    WRITELOG( "CLocationContextPlugin::ContextSnapshot()" );

    if ( !iLocationTrailConnected ) // no trail, no snapshot

    	{

    	for(TInt i = 0; i < count; i++)

    		{

    		CHarvesterData* hd = aHDArray[i];

    		hd->SetErrorCode( KErrDisconnected );

    		aObserver.PluginSnapshotStatus( hd );

    		}

    	return;

    	}

    TLocationData data;

    RLocationTrail::TTrailState state;

    CMdEProperty* timeProp = NULL;

    TInt ret = KErrNone;

    iLocationTrail.GetLocationTrailState( state );

    if ( state != RLocationTrail::ETrailStopped && state != RLocationTrail::ETrailStopping )

    	{

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

    		{

    		CMdEObject& mdeObject = ((CHarvesterData*)aHDArray[i])->MdeObject();

    		TRAP( ret, GetMdeObjectCreationTimeL( mdeObject, timeProp ) );

    		if ( ret != KErrNone )

    			{

    			continue;

    			}

#ifdef _DEBUG

    		TRAP_IGNORE(

    		WRITELOG1( "CLocationContextPlugin::ContextSnapshot() - timeProp: %Ld", 

    				timeProp->TimeValueL().Int64() ) );

    		WRITELOG1( "CLocationContextPlugin::ContextSnapshot() - Location trail state: %d", 

    				state );

#endif

    		TRAP_IGNORE(ret = iLocationTrail.RetrieveLocation( timeProp->TimeValueL(), data, state ));

#ifdef _DEBUG

    		WRITELOG1( "CLocationContextPlugin::ContextSnapshot() - Retrieve location returned: %d", ret );

    		WRITELOG1( "CLocationContextPlugin::ContextSnapshot() - Latitude was: %f", data.iPosition.Latitude() );

    		WRITELOG1( "CLocationContextPlugin::ContextSnapshot() - Longitude was: %f", data.iPosition.Longitude() );

    		WRITELOG1( "CLocationContextPlugin::ContextSnapshot() - Altitude was: %f", data.iPosition.Altitude() );

#endif

    		if (ret == KErrNone)

    			{

    			if ( !Math::IsNaN(data.iPosition.Latitude() ) ||

   	        		 !Math::IsNaN(data.iPosition.Longitude() ) || 

   	        		 !Math::IsNaN(data.iPosition.Altitude() ) ||

   	        		 data.iNetworkInfo.iCellId > 0 || data.iNetworkInfo.iLocationAreaCode > 0 ||

   	        		 data.iNetworkInfo.iCountryCode.Length() > 0 ||

   	        		 data.iCountry.Length() > 0 || data.iNetworkInfo.iNetworkId.Length() > 0 )

   	        		{

#ifdef _DEBUG

	    			WRITELOG1( "CLocationContextPlugin::ContextSnapshot() Create location object for id: %d", mdeObject.Id());

#endif

	    			ret = iManipulator.CreateLocationObject(data, mdeObject.Id());

	    			WRITELOG1( "CLocationContextPlugin::ContextSnapshot() Create location object returned: %d", ret);

   	        		}

    			}

	        else

	        	{

	        	ret = KErrNone;

	        	}

    		}

        }

    // Notify to context framework

    for(TInt i = 0; i < count; i++)

        {

        CHarvesterData* hd = aHDArray[i];

        hd->SetErrorCode( KErrNone );

        aObserver.PluginSnapshotStatus( hd );

        }

    }

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

// Get mde object creation date/time.

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

//

void CLocationContextPlugin::GetMdeObjectCreationTimeL( CMdEObject& aObject, 

	CMdEProperty*& aProperty )

    {

    CMdENamespaceDef& namespaceDef = iMdeSession->GetDefaultNamespaceDefL();

    CMdEObjectDef& objectDef = namespaceDef.GetObjectDefL( Object::KBaseObject );

    CMdEPropertyDef& creationDef = objectDef.GetPropertyDefL( Object::KLastModifiedDateProperty );

    CMdEProperty* property = NULL;

    aObject.Property( creationDef, property, 0 );

    if ( !property )

        {

        User::Leave( KErrNotFound );

        }

    aProperty = property;

    }