/*
 * "$Id: rsdir.h,v 1.1 2007-02-19 20:08:30 rmf24 Exp $"
 *
 * RetroShare C++ Interface.
 *
 * Copyright 2004-2007 by Robert Fernie.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License Version 2 as published by the Free Software Foundation.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 *
 * Please report all bugs and problems to "retroshare@lunamutt.com".
 *
 */


#ifndef RSUTIL_DIRFNS_H
#define RSUTIL_DIRFNS_H

#include <string>
#include <list>
#include <set>
#include <stdint.h>

class RsThread;

#include <retroshare/rstypes.h>

#ifndef WINDOWS_SYS
typedef int rs_lock_handle_t;
#else
typedef /*HANDLE*/ void *rs_lock_handle_t;
#endif

// This is a scope guard on a given file. Works like a mutex. Is blocking.
// We could do that in another way: derive RsMutex into RsLockFileMutex, and
// use RsStackMutex on it transparently. Only issue: this will cost little more 
// because of the multiple inheritance.
//
class RsStackFileLock
{
	public:
		RsStackFileLock(const std::string& file_path) ;
		~RsStackFileLock() ;

	private:
		rs_lock_handle_t _file_handle ;
};

namespace RsDirUtil {

std::string 	getTopDir(const std::string&);
std::string 	getRootDir(const std::string&);
std::string 	removeRootDir(const std::string& path);
void 			removeTopDir(const std::string& dir, std::string &path);
std::string 	removeRootDirs(const std::string& path, const std::string& root);

// Renames file from to file to. Files should be on the same file system.
//	returns true if succeed, false otherwise.
bool		renameFile(const std::string& from,const std::string& to) ;
//bool		createBackup (const std::string& sFilename, unsigned int nCount = 5);

// returns the CRC32 of the data of length len
//
uint32_t rs_CRC32(const unsigned char *data,uint32_t len) ;

// Returns %u, %lu, or %llu, depending on the size of unsigned int, unsigned long and unsigned long long on the current system.
// Use as;
// 			sscanf(string, RsDirUtil::scanf_string_for_uint( sizeof(X) ), &X) ;
//
const char *scanf_string_for_uint(int bytes) ; 

int     	breakupDirList(const std::string& path, std::list<std::string> &subdirs);

bool 		copyFile(const std::string& source,const std::string& dest);
bool 		fileExists(const std::string& file);
bool    	checkFile(const std::string& filename,uint64_t& file_size,bool disallow_empty_file = false);
bool    	checkDirectory(const std::string& dir);
bool    	checkCreateDirectory(const std::string& dir);

bool    	cleanupDirectory(const std::string& dir, const std::set<std::string> &keepFiles);
bool    	cleanupDirectoryFaster(const std::string& dir, const std::set<std::string> &keepFiles);

bool 		hashFile(const std::string& filepath,   std::string &name, RsFileHash &hash, uint64_t &size);
bool 		getFileHash(const std::string& filepath,RsFileHash &hash, uint64_t &size, RsThread *thread = NULL);

Sha1CheckSum sha1sum(const uint8_t *data,uint32_t size) ;

// Creates a lock file with given path, and returns the lock handle
// returns:
// 	0: Success
// 	1: Another instance already has the lock
//    2 : Unexpected error
int createLockFile(const std::string& lock_file_path, rs_lock_handle_t& lock_handle) ;

// Removes the lock file with specified handle.
void releaseLockFile(rs_lock_handle_t lockHandle) ;

std::wstring 	getWideTopDir(std::wstring);
std::wstring 	getWideRootDir(std::wstring);
std::wstring 	removeWideRootDir(std::wstring path);
std::wstring     removeWideTopDir(std::wstring dir);
std::wstring 	removeWideRootDirs(std::wstring path, std::wstring root);

// Renames file from to file to. Files should be on the same file system.
//	returns true if succeed, false otherwise.
bool		renameWideFile(const std::wstring& from,const std::wstring& to) ;

int     	breakupWideDirList(std::wstring path,
                        	std::list<std::wstring> &subdirs);

bool    	checkWideDirectory(std::wstring dir);
bool    	checkWideCreateDirectory(std::wstring dir);
bool    	cleanupWideDirectory(std::wstring dir, std::list<std::wstring> keepFiles);

bool 		hashWideFile(std::wstring filepath,std::wstring &name, RsFileHash &hash, uint64_t &size);

bool 		getWideFileHash(std::wstring filepath,                RsFileHash &hash, uint64_t &size);

FILE		*rs_fopen(const char* filename, const char* mode);

std::string convertPathToUnix(std::string path);
std::string makePath(const std::string &path1, const std::string &path2);
}

	
#endif