/*

* Copyright (c) 2006-2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of the License "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: 

* @internalComponent * @released

* Driveimage class implementation.

*

*/

#include <stdlib.h>

#include <string>

#ifdef __LINUX__

	#include <dirent.h>

	#ifndef MKDIR

		#define MKDIR(a)	mkdir(a,0777)

	#endif

#else

	#ifdef _STLP_INTERNAL_WINDOWS_H

	#define __INTERLOCKED_DECLARED

	#endif

	#include <windows.h>

	#include <direct.h>

	#ifndef MKDIR

		#define MKDIR		mkdir

	#endif

#endif

#include <sys/stat.h>

#include <sys/types.h>

using namespace std;

#include <f32file.h>

#include "h_utl.h"

#include "r_obey.h"

#include "r_romnode.h"

#include "r_rofs.h"

#include "r_driveimage.h"

// File format supported by Rofsbuild

DriveFileFormatSupported CDriveImage::iFormatType[] =

	{

		{"FAT16",EFAT16},

		{"FAT32",EFAT32},

		{0,EFATINVALID}

	};

/**

File format conversion from char* to coresponding enum value.

@param aUserFileFormat - pointer to user entered file format.

@param aDriveFileFormat - Reference to actual variable.

*/

TBool CDriveImage::FormatTranslation(const char* aUserFileFormat,enum TFileSystem& aDriveFileFormat)

	{

	struct DriveFileFormatSupported* strPointer = iFormatType;

	for( ; (strPointer->iDriveFileFormat) != '\0' ; ++strPointer )

		{

		if(!strcmp(aUserFileFormat,strPointer->iDriveFileFormat))

			{

			aDriveFileFormat = strPointer->iFileSystem;

			return ETrue;

			}

		}	

	return EFalse;

	}

/**

Constructor: CDriveImage class 

@param aObey - pointer to Drive obey file.

*/

CDriveImage::CDriveImage(CObeyFile *aObey)

	: iObey( aObey ),iParentDirEntry(0),iListReference(0),iTempDirName(NULL), iData(0)

	{

	}

/**

Destructor: CDriveImage class 

Release the resources allocated in heap.

*/

CDriveImage::~CDriveImage()

	{

	iNodeAddStore.clear();

	iNodeList.clear();

	if(iData)

		delete[] iData;

	if(iTempDirName)

		delete[] iTempDirName;

	}

/**

Creates the STL list to interface with file system module.

Creates the Temp folder for placing the executables

   (those changed,due to user option like compression,un-compression & fileattribute)

Updates the excutable options (file attributes, compression etc)

@return Status - 'KErrNone' - successfully done above operations.

                 'KErrNoMemory' - Not able to allocate the memory.

				 'KErrGeneral' - Unable to done the above operations.

*/

TInt CDriveImage::CreateList()

	{

	TRomNode* pRootDir = iObey->iRootDirectory;

	TInt16 dirCheck = 1;

	TInt retStatus = 0;

	// For Creating the temp folder.	

	iTempDirName = new char[KMaxGenBuffer];

	if(!iTempDirName)

		return KErrNoMemory;

	// Create the temp folder.

	// Check for folder exist, if exist it loops until dir created or loop exit.

	while(dirCheck)

		{

		sprintf(iTempDirName,"%s%05d","temp",dirCheck); 

		retStatus = MKDIR(iTempDirName); 

		if(!retStatus)

			break;	

		++dirCheck;

		}

	if(!dirCheck)

		{

		Print(EError,"Unable to Create the temp folder,Check directory settings.\n");

		if(iTempDirName)

			{

			delete[] iTempDirName;

			iTempDirName = 0;

			}

		return KErrCancel;

		}

	// Construct the file options.

	if(ConstructOptions() != KErrNone)

		{

		return KErrGeneral;

		}

	// Construct the List.

	if((GenTreeTraverse(pRootDir,KNodeTypeRoot)) != KErrNone )

		{

		return KErrGeneral;

		}

	return KErrNone;

	}

/**

Creates the Image/Call to file system module.

Updates the required operations to generate the data drive images.

Deletes the temp folder if created.

Calls the file system modules with required parameters.

@param alogfile - Logfile name required for file system module.

@return Status(r) - returns the status of file system module.

                   'KErrGeneral' - Unable to done the above operations properly.

*/

TInt CDriveImage::CreateImage(const char* alogfile)

	{

	TInt retStatus = 0;

	retStatus = CreateList();

	if((retStatus == KErrCancel) || (retStatus == KErrNoMemory))

		return KErrGeneral;

	if(retStatus != KErrNone)

		{

		Print(EError,"Insufficent Memory/Not able to generate the Structure\n");

		if(DeleteTempFolder(iTempDirName) != KErrNone )

			{

			Print(EWarning,"Not able to delete the temp folder : %s",iTempDirName);

			}

		return KErrGeneral;

		}

	// Close log file.

	H.CloseLogFile();		

	// Convert fileformat to corresponding enum value.

	enum TFileSystem fileFormat = (TFileSystem)0;

	FormatTranslation(iObey->iDriveFileFormat,fileFormat);

	// Call to file system module. create the image.

	if(iObey->iDataSize)

		retStatus = CFileSystemInterFace::CreateFilesystem(&iNodeList,fileFormat,

														(char*)iObey->iDriveFileName,

														(char*)alogfile,

														iObey->iConfigurableFatAttributes,																											

														iObey->iDataSize); 

	else

		retStatus = CFileSystemInterFace::CreateFilesystem(&iNodeList,fileFormat,

														(char*)iObey->iDriveFileName,

														(char*)alogfile,

														iObey->iConfigurableFatAttributes);														; 

	//delete the temp folder.

	if(DeleteTempFolder(iTempDirName) != KErrNone )

		{

		cout << "Warning: Not able to delete the temp folder : " << iTempDirName << "\n" ;

		}

	return 	retStatus;

	}

/**

Delete the temp directory.

@param aTempDirName - Temporory folder name to be deleted.

@return Status(r) - returns the status.

                   'KErrGeneral' - Unable to done the above operations properly.

				   'KErrNone' - successfully deleted the folder.

*/

TInt CDriveImage::DeleteTempFolder(const char* aTempDirName)

	{

	TInt fileDeleted = 1;

	string dirPath(aTempDirName); 

	string fileName(aTempDirName); 

#ifdef __LINUX__

	// Open directory

	DIR *dirHandler = opendir(aTempDirName);

	struct dirent *dirEntry;

	if(!dirHandler)

		return KErrGeneral;

	dirPath.append("/");

	fileName.append("/");

	// Go through each entry

	while((dirEntry = readdir(dirHandler)))

		{

		if(dirEntry->d_type != DT_DIR) 

			{

			fileName.append((char*)dirEntry->d_name);

			remove(fileName.c_str());

			fileName.assign(dirPath);

			}

		}

	//Close dir

	if(!closedir(dirHandler))

		{

		fileDeleted = rmdir(aTempDirName);

		}

#else

	WIN32_FIND_DATA FindFileData;

	HANDLE hFind = INVALID_HANDLE_VALUE;

	dirPath.append("\\*");

	fileName.append("\\");

	// find the first file

	hFind = FindFirstFile(dirPath.c_str(),&FindFileData);

	if(hFind == INVALID_HANDLE_VALUE) 

		return KErrGeneral;

	dirPath.assign(fileName);   

	do

	{

	// Check for directory or file.

	if(!(FindFileData.dwFileAttributes  & FILE_ATTRIBUTE_DIRECTORY))

		{

		// Delete the file.

		fileName.append((char*)FindFileData.cFileName);

		remove(fileName.c_str());

		fileName.assign(dirPath);

		}

	} while(FindNextFile(hFind,&FindFileData));

	FindClose(hFind);

	if(ERROR_NO_MORE_FILES != GetLastError())

		{

		cout << "Warning: FindNextFile error. Error is " << GetLastError() << "\n" ;

		}

	fileDeleted = _rmdir(aTempDirName);

#endif

	if(!fileDeleted)

		return KErrNone;

	else

		return KErrGeneral;

	}

/**

General Tree Traverse to create the List.

Recursive call to update the list.

@param anode - Current Node in the tree.

@param anodeType - Node type(root,child,sibling)

@return r - returns 'KErrNoMemory' if fails to generate the list or memory not allocated.

            or 'KErrNone'

*/

TInt CDriveImage::GenTreeTraverse(TRomNode* anode,enum KNodeType anodeType)    

	{

	TInt r =0;			

	if((r = CreateDirOrFileEntry(anode,anodeType)) != KErrNone) 

		return KErrNoMemory;

	if(anode->Currentchild())

		{

		if((r = GenTreeTraverse(anode->Currentchild(),KNodeTypeChild)) != KErrNone)

			return KErrNoMemory;

		if(iNodeAddStore.size())	

			iNodeAddStore.pop_back();

		--iListReference;

		}

	if(anode->Currentsibling())

		{

		if((r = GenTreeTraverse(anode->Currentsibling(),KNodeTypeSibling)) != KErrNone)

			return KErrNoMemory;

		}

	return r;

	}

/**

Generate the List. required for drive image creation.

Hidden file node is not placed in list.

@param atempnode - Current Node in the tree.

@param aType - Node type(root,child,sibling)

@return r - returns 'KErrNoMemory' if memory is not allocated or 'KErrNone'

*/

TInt CDriveImage::CreateDirOrFileEntry(TRomNode* atempnode,enum KNodeType aType)    

	{

	CDirectory* parentDirectory = NULL ;

	if(KNodeTypeChild == aType)

		parentDirectory = iParentDirEntry;

	else if(KNodeTypeSibling == aType)

		parentDirectory = (CDirectory*)(iNodeAddStore[iListReference-1]);

	CDirectory* iDirectory = new CDirectory(atempnode->iName,parentDirectory);

	if(!iDirectory)									

		return KErrNoMemory;

	char attrib = 0 ;

	if(atempnode->iAtt & KEntryAttReadOnly)

		attrib |= EAttrReadOnly ;

	if(atempnode->iAtt & KEntryAttHidden)

		attrib |= EAttrHidden ;

	if(atempnode->iAtt & KEntryAttSystem)

		attrib |= EAttrSystem ;

	// for files only.

	if(atempnode->iEntry)

		{

		iDirectory->SetEntryAttribute(attrib);

		// don't place the hidden files to list.

		if(!atempnode->iHidden)	

			{

			iDirectory->SetFilePath(atempnode->iEntry->iFileName);

			iDirectory->SetFileSize(atempnode->iSize);

			}

		else

			{

			iNodeAddStore.push_back((void*)iParentDirEntry);

			++iListReference;

			return KErrNone;  

			}	

		}

	else

		iDirectory->SetEntryAttribute(attrib | EAttrDirectory);

	switch(aType)

		{

		case KNodeTypeRoot:

			iDirectory->SetEntryAttribute(EAttrVolumeId);

			iNodeList.push_back(iDirectory);	

			iParentDirEntry = iDirectory; 

			break;

		case KNodeTypeChild:

			iNodeAddStore.push_back((void*)iParentDirEntry);

			++iListReference;

			parentDirectory->InsertIntoEntryList(iDirectory); 

			iParentDirEntry = iDirectory ;

			break;

		case KNodeTypeSibling:

			parentDirectory->InsertIntoEntryList(iDirectory); 

			iParentDirEntry = iDirectory ;

			break;

		default: 

			break;

		}

	return KErrNone;                                             

	}

/**

Traverses all entries and update compress/uncompress and file attribute options.

Place executables in temp folder.(if changed)

Hidden file node is not placed in temp folder.

@return r - returns 'KErrNoMemory/KErrGeneral' if fails to update the options or memory

            not allocated or else 'KErrNone' for Succesfully operation.

*/

TInt CDriveImage::ConstructOptions()  {

	TInt32 len = 0;

	TRomNode* node = TRomNode::FirstNode();

        CBytePair bpe;

	while(node)

		{

		// Don't do anything for hidden files.

		if(node->IsFile() && (!node->iHidden))

			{

			TInt32 size=HFile::GetLength(node->iEntry->iFileName);    

			if(size <= 0)

				{

				Print(EWarning,"File %s does not exist or is 0 bytes in length.\n",node->iEntry->iFileName);

				}

			node->iSize = size;

			if(node->iEntry->iExecutable && (size > 0))

				{

				if((node->iFileUpdate) || (node->iOverride))

					{

					size_t allocSize = size << 1 ;

					iData = new char[allocSize];

					if(!iData)

						return KErrNoMemory;

					HMem::Set(iData, 0xff, allocSize);

                    TUint8* aData = (TUint8*)iData;

					len = node->PlaceFile(aData,0,allocSize,&bpe);

					if(len < KErrNone)

						{	

						delete[] iData;

						iData = 0;

						return KErrGeneral;

						}

					// Place the file in Newly created Folder. 

					TInt r = PlaceFileTemporary(len,node);

					delete[] iData;

					iData = 0;

					if(r != KErrNone)

						{

						return r;

						}

					} // file update end.

				}

			} // is file end