/*

* 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: 

*

*/

/**

 @file

 @internalComponent

 @released

*/

#include "cntfilesearch.h"

const TInt KNameArrayGranularity = 32;

//Define the patchable data for database cache size here but which is actually used

//in CPplContactsFile.cpp. This is a must-be so that the compiler cannot perform any

//"constant folding" with the value   

EXPORT_C extern const TInt KContactsModelSqliteDbCacheSize = 0;

_LIT(KSqLiteFilePrefix, "SQLite__");

const TInt KPrefixNameLength = 8;   // length of above prefix string

CDesCArray* CCntFileScanner::ListFilesL(RFs& aFs, TDriveUnit* aDriveUnit)

	{

	CCntFileScanner* scanner = new (ELeave) CCntFileScanner(aFs);  // gets pushed in first lines of ScanLD

	// coverity [memory_leak]

	return scanner->ScanLD(aDriveUnit);

	}

CCntFileScanner::CCntFileScanner(RFs& aFs)

	:

	iFs(aFs)

	{

	}

CCntFileScanner::~CCntFileScanner()

	{

	delete iDirStack;

	}

CDesCArray* CCntFileScanner::ScanLD(TDriveUnit* aDriveUnit)

	{

	CleanupStack::PushL(this);

	iFs.PrivatePath(iPath);

	iDirStack = new(ELeave) CDesCArrayFlat(KNameArrayGranularity);

	if (aDriveUnit)

		{

		AddDirL(*aDriveUnit);

		}

	else

		{

		GenerateRootDirsL();

		}

	CDesCArray* results = new(ELeave) CDesCArrayFlat(KNameArrayGranularity);

	CleanupStack::PushL(results);

	ScanForFilesL(*results);

	CleanupStack::Pop(results);

	CleanupStack::PopAndDestroy(this);

	return results;

	}

void CCntFileScanner::AddDirL(TDriveUnit& aDriveUnit)

	{

	ASSERT(iDirStack);

	TBuf<3> root;

	root.Copy(aDriveUnit.Name());

	root.Append(TChar(KPathDelimiter));

	iDirStack->AppendL(root);

	}

void CCntFileScanner::GenerateRootDirsL()

	{

	ASSERT(iDirStack);

	// Generate list of root dirs.

	TBuf<3> root;

	TDriveList driveList;

	User::LeaveIfError(iFs.DriveList(driveList));

	TInt len = driveList.Length();

	for (TInt index = 0; index < len; ++index)

		{

		if(driveList[index]) // Check drive exists.

			{

			root.Copy(TDriveUnit(index).Name());

			root.Append(TChar(KPathDelimiter));

			iDirStack->AppendL(root);

			}

		}

	}

void CCntFileScanner::ScanForFilesL(CDesCArray& aResults)

	{

	ASSERT(iDirStack);

	// Traverse the directory stack until all directories have been examined.

	TFileName filename;

	while(iDirStack->Count())

		{

		// Pop the dir.

		filename.Copy(iDirStack->MdcaPoint(0));

		iDirStack->Delete(0);

		if(iPath.Length()!=0)

			{

			filename.Delete(2,1);

			filename.Append(iPath);

			}

		else if(filename[filename.Length() - 1] != KPathDelimiter)

			{ // Check it has a trailing '\' to identify it as a dir path.

			filename.Append(TChar(KPathDelimiter));

			}

		TRAPD(err,ScanDirectoryL(filename, aResults));

		if(err==KErrNoMemory)

			{ // Continue to search in each drive except for out of memory.

			User::Leave(err);

			}

		}

	}

/**

Get a list of all files and subdirectories in aDirPath (when the path is not

specified).

*/

void CCntFileScanner::ScanDirectoryL(const TDesC& aDirPath, CDesCArray& aResults)

	{

	CDir* files = NULL;

	CDir* subdirs = NULL;

	User::LeaveIfError(iFs.GetDir(aDirPath, KEntryAttAllowUid, ESortByName, files, subdirs));

	TRAPD(err,AppendFileNamesL(*files, aDirPath, aResults));

	delete files;

	delete subdirs;

	User::LeaveIfError(err);

	}

void CCntFileScanner::AppendFileNamesL(const CDir& aFileSet, const TDesC& aDirPath, CDesCArray& aFileNames) const

	{

	TParse parse;

	TInt len = aFileSet.Count();

	for(TInt idx = 0; idx < len ; ++idx)

		{

		const TEntry& entry = aFileSet[idx];

		User::LeaveIfError(parse.SetNoWild(entry.iName, &aDirPath, NULL));

		TInt found = parse.NameAndExt().FindF(KSqLiteFilePrefix);

		if (found == 0 && iPath.Length() > 0)

			{

			// add drive, remove prefix, add to list of files

			TFileName filename(parse.Drive());

			filename.Append(parse.NameAndExt().Right(parse.NameAndExt().Length() - KPrefixNameLength));	

			aFileNames.AppendL(filename);

			}

		}

	}