// 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;

	}