// Copyright (c) 2005-2009 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:

 // SettingsManage.cpp

 // Part of the MVS Application for TechView

 //

 #include "SettingsManager.h"

 #include "MVSAppUI.h"

 #include "MVSConfigAudioFormatDialog.h"

 #include "MVSConfigVideoFormatDialog.h"

 _LIT(KFullPathOfFileStore,"C:\\private\\102737E8\\MvsSettings.dat");	

 CSettingsManager::CSettingsManager()

 :iStore(0),iHasSettings(1)

 	{	

 	}

 CSettingsManager::~CSettingsManager()

 	{

 	iFsSession.Close();  //close the file session

 	iArrUid.Close();

 	iArrStreamId.Close();

 	if(iStore)

 		{

 		}

 	}

 void CSettingsManager::ConstructL()

 	{

 	User::LeaveIfError(iFsSession.Connect()); // start a file session

 	}

 CSettingsManager* CSettingsManager::NewL()

 	{

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

 	CleanupStack::PushL(self);

 	self->ConstructL();

 	CleanupStack::Pop(self);

 	return self;

 	}

 TBool CSettingsManager::OpenStore2ReadLC()

 	{

 	TParse	fileStoreName;

 	iFsSession.Parse(KFullPathOfFileStore,fileStoreName);

 	iStore = CPermanentFileStore::OpenLC(iFsSession,

 										fileStoreName.FullName(),

 										EFileRead );

 	iHasSettings = ETrue;

 	return iHasSettings;

 	}

 void CSettingsManager::OpenStore2WriteLC()

 	{

 	TPath privatePath(KFullPathOfFileStore);

 	iFsSession.PrivatePath(privatePath);

 	TParse	fileStoreName;

 	iFsSession.MkDirAll(KFullPathOfFileStore);

 	iFsSession.Parse(KFullPathOfFileStore,fileStoreName);

 	if(iHasSettings)

 		{

 		iStore = CPermanentFileStore::OpenLC(iFsSession,

 											fileStoreName.FullName(),

 											EFileWrite );

 		}

 	else

 		{

 		iStore = CPermanentFileStore::CreateLC(iFsSession,

 											fileStoreName.FullName(),

 											EFileWrite );

 		}

 	iStore->SetTypeL(KPermanentFileStoreLayoutUid);	 	

 	}

 TBool CSettingsManager::HasSettings()

 	{

 	return iHasSettings;

 	}

 void CSettingsManager::ReadGeneralSettingsL(CMVSAppUi* aAppUI)

 	{

 	if(!FileExists())

 		return;

 	OpenStore2ReadLC();

 	RStoreReadStream instream;

 	iRootId = iStore->Root();

 	instream.OpenLC(*iStore,iRootId); //open root stream for reading

 	instream >> iGenSettingsId;

 	CleanupStack::PopAndDestroy();			

 	//check for the validity of the streamid

 	if(!iGenSettingsId.Value())

 		{

 		CleanupStack::PopAndDestroy();

 		return;

 		}

 	//open the stream for general settings

 	instream.OpenLC(*iStore,iGenSettingsId); 

 	aAppUI->InternalizeL(instream);

 	CleanupStack::PopAndDestroy(2);	

 	}

 void CSettingsManager::WriteGeneralSettingsL(CMVSAppUi* aAppUI)

 	{	

 	OpenStore2WriteLC();

 	RStoreWriteStream outstream;

 	/*

 	if already there is stream id for general settings open the existing

 	stream; otherwise create new stream id 

 	*/

 	TBool updation = iGenSettingsId.Value();

 	if(updation)

 		{

 		outstream.ReplaceLC(*iStore,iGenSettingsId);

 		}

 	else

 		{

 		iGenSettingsId = outstream.CreateLC(*iStore);

 		}

 	//write the general settings

 	aAppUI->ExternalizeL(outstream);

 	outstream.CommitL();

 	CleanupStack::PopAndDestroy();

 	if(!updation)

 		{

 		outstream.ReplaceLC(*iStore,iStore->Root());

 		TUid tempUid;

 		TStreamId tempStreamId(0);

 		WriteIndexL(outstream,tempUid,tempStreamId);

 		CleanupStack::PopAndDestroy();	

 		}		

 	iStore->CommitL();// commit the changes to the store

 	CleanupStack::PopAndDestroy(); //for iStore 

 	iFsSession.Close(); //close the file session

 	}	  

 /*

  *This function assumes that the index doesn't exist

  */

 void CSettingsManager::MakeSeedIndexL()

 	{

 	OpenStore2WriteLC();

 	RStoreWriteStream outstream;

 	TStreamId invalidId(0); //caution: confirm the reliability of this value

 	iRootId = outstream.CreateLC(*iStore);		

 	//write an invalid  stream index for general settings i.e.iGenSettingsId

 	outstream << invalidId;	 

 	//write no. of controllers as 0

 	outstream.WriteInt8L(0);

 	outstream.CommitL(); //commit stream changes

 	CleanupStack::PopAndDestroy();

 	iStore->SetRootL(iRootId);

 	iStore->CommitL(); //commit changes to store

 	CleanupStack::PopAndDestroy(); //for iStore	

 	}

 // the stream should be in the beginning of controller section

 void CSettingsManager::ReadControllerTableL(RReadStream& aStream)

 	{

 	iControllerCnt = aStream.ReadInt8L();	

 	TStreamId tempId;

 	iArrUid.Reset();

 	iArrStreamId.Reset();

 	//read the available pairs of Uid - Streamd Ids.

 	for(TInt8 i = 0; i < iControllerCnt;i++)

 		{

 		iArrUid.AppendL(TUid::Uid(aStream.ReadInt32L()));

 		aStream >> tempId;

 		iArrStreamId.AppendL(tempId);

 		}

 	}

 TBool CSettingsManager::IsControllerAvailableL(const TUid& aUid,

 													  TStreamId&  aStreamId)

 	{

 	 // if there is no Store fiel return false

 	if(!FileExists())

 		return 0;

 	OpenStore2ReadLC();

 	RStoreReadStream instream;

 	iRootId = iStore->Root();

 	instream.OpenLC(*iStore,iRootId); //open root stream for reading

 	instream >> iGenSettingsId;	 //read this to move to controller section

 	ReadControllerTableL(instream);

 	CleanupStack::PopAndDestroy(2);			

 	for(TUint8 i = 0; i < iControllerCnt; i++)

 		{

 		if(iArrUid[i] == aUid)

 			{

 		  	aStreamId = iArrStreamId[i];

 		  	return 1;	

 			}					

 	 	}

 	return 0;

 	}

 TInt CSettingsManager::ReadAudioDataL(CMVSConfigAudioFormatDialog* aAudioFormatDlg,

  							                 const TUid& aUid)

 	{

 	TStreamId controllerId;

 	// if the controller settings is not available return

 	if(!IsControllerAvailableL(aUid,controllerId))

 		return 0;

 	//open the store to read

 	if(!FileExists())

 		return 0;

 	OpenStore2ReadLC();

 	//open the stream of the given controller for reading

 	RStoreReadStream instream;

 	instream.OpenLC(*iStore,controllerId);

 	aAudioFormatDlg->InternalizeL(instream);

 	CleanupStack::PopAndDestroy(2);

 	return 1;

 	}

 void CSettingsManager::WriteAudioDataL(CMVSConfigAudioFormatDialog* aAudioFormat,

 					  				const TUid& aUid)

 	{

 	TStreamId controllerId;		

 	RStoreWriteStream outstream;

 	TBool existingController = IsControllerAvailableL(aUid,controllerId);

 	OpenStore2WriteLC();	

 	if(!existingController)

 		{

 		//if controller settings is not available create new stream

 		controllerId = outstream.CreateLC(*iStore);		

 		}

 	else //open the existing for updation

 		{

 		outstream.ReplaceLC(*iStore,controllerId); 				

 		}

 	aAudioFormat->ExternalizeL(outstream);

 	outstream.CommitL();

 	CleanupStack::PopAndDestroy();

     /*

     if there is no updation for controller i.e. new controller settings 

     is entered

     */

 	if(!existingController)

 		{

 		outstream.ReplaceLC(*iStore,iRootId); 					

 		WriteIndexL(outstream,aUid,controllerId);

 		CleanupStack::PopAndDestroy();		

 		}

 	iStore->CommitL();

 	CleanupStack::PopAndDestroy(); //for iStore

 	}	

 void CSettingsManager::WriteIndexL(RWriteStream& aStream,

 								  const TUid& aUid,

 								  TStreamId& aStreamId)

 	{

 	TBool bNewPlugin = aStreamId.Value();

 	TUint8 uchExistingPluginCnt = iControllerCnt;

 	//write root index

 	aStream << iGenSettingsId;

 	if(bNewPlugin)

 		{

 		iControllerCnt++;		

 		}

 	aStream.WriteInt8L(iControllerCnt);

 	//write the uid-streamid for existing plugins

 	for(TUint8 i = 0; i < uchExistingPluginCnt; i++)

 		{

 		aStream.WriteInt32L(iArrUid[i].iUid); //write uid

 		aStream << 	iArrStreamId[i];	 //write streamid

 		}

 	if(!bNewPlugin)

 		{

 		aStream.CommitL();

 		return;	

 		}

 	//write uid-streamId for new plugin

 	aStream.WriteInt32L(aUid.iUid); //write uid

 	aStream << aStreamId;			//write streamid

 	iArrUid.AppendL(aUid);

 	iArrStreamId.AppendL(aStreamId);	

 	aStream.CommitL();		

 	}

 TBool CSettingsManager::ReadVideoDataL(CMVSConfigVideoFormatDialog* aVideoFormatDlg,

  							          const TUid& aUid)

 	{

 	TStreamId controllerId;

 	// if the controller settings is not available return

 	if(!IsControllerAvailableL(aUid,controllerId))

 		return 0;

 	//open the store to read

 	if(!FileExists())

 		return 0;

 	OpenStore2ReadLC();

 	//open the stream of the given controller for reading

 	RStoreReadStream instream;

 	instream.OpenLC(*iStore,controllerId);

 	aVideoFormatDlg->InternalizeL(instream);

 	CleanupStack::PopAndDestroy(2); 

 	return 1;

 	}

 void  CSettingsManager::WriteVideoDataL( CMVSConfigVideoFormatDialog* aVideoFormatDlg,

 						 				const TUid& aUid)

 	{

 	TStreamId controllerId;		

 	RStoreWriteStream outstream;

 	TBool existingController = IsControllerAvailableL(aUid,controllerId);

 	OpenStore2WriteLC();	

 	if(!existingController)

 		{

 		//if controller settings is not available create new stream

 		controllerId = outstream.CreateLC(*iStore);		

 		}

 	else //open the existing for updation

 		{

 		outstream.ReplaceLC(*iStore,controllerId); 				

 		}

 	aVideoFormatDlg->ExternalizeL(outstream);

 	outstream.CommitL();

 	CleanupStack::PopAndDestroy();

     /*

     if there is no updation for controller i.e. new controller settings 

     is entered

     */

 	if(!existingController)

 		{

 		outstream.ReplaceLC(*iStore,iRootId); 					

 		WriteIndexL(outstream,aUid,controllerId);

 		CleanupStack::PopAndDestroy();		

 		}

 	iStore->CommitL();

 	CleanupStack::PopAndDestroy(); //for iStore	

 	}

 TBool CSettingsManager::FileExists()

 	{

 	TParse fileStoreName;

 	iFsSession.Parse(KFullPathOfFileStore,fileStoreName);

 	//check whether a settings file already exists

 	RFile file;

 	if(file.Open(iFsSession,fileStoreName.FullName(),EFileRead)!= KErrNone) // if the file doesn't exist already

 		{

 		iHasSettings = 0;

 		return EFalse;

 		}

 	file.Close();

 	return ETrue;

 	}