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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de) *
// **************************************************************************
//
#include "detect_renaming.h"
#include <map>
#include <vector>
#include <boost/bind.hpp>
using namespace FreeFileSync;
/*detect renamed files:
Example:
X -> |_| Create right
|_| -> Y Delete right
is detected as:
Rename Y to X on right
Algorithm:
----------
DB-file left ---filename, Metadata(=:MD)---> DB-file right
/|\ |
| fileID, MD
fileID, MD |
| \|/
X Y
*/
class FindDBAssoc
{
/*
load and associate db-files by filename and metadata(size, date)
fileID, MD |-> fileID
*/
public:
struct AssocKey
{
AssocKey(const Utility::FileID& fileId,
const wxLongLong& lastWriteTimeRaw,
const wxULongLong& fileSize);
bool operator<(const AssocKey& other) const;
Utility::FileID fileId_;
wxLongLong lastWriteTimeRaw_;
wxULongLong fileSize_;
};
FindDBAssoc(const FreeFileSync::BaseDirMapping& baseMapping,
std::map<AssocKey, Utility::FileID>& assocDBLeftToRight);
private:
void recurse(const DirContainer& leftSide, const DirContainer& rightSide);
std::map<AssocKey, Utility::FileID>& assocDBLeftToRight_; //-->
};
inline
FindDBAssoc::AssocKey::AssocKey(const Utility::FileID& fileId,
const wxLongLong& lastWriteTimeRaw,
const wxULongLong& fileSize) :
fileId_(fileId),
lastWriteTimeRaw_(lastWriteTimeRaw),
fileSize_(fileSize) {}
inline
bool FindDBAssoc::AssocKey::operator<(const AssocKey& other) const
{
if (fileId_ != other.fileId_)
return fileId_ < other.fileId_;
if (lastWriteTimeRaw_ != other.lastWriteTimeRaw_)
return lastWriteTimeRaw_ < other.lastWriteTimeRaw_;
return fileSize_ < other.fileSize_;
}
FindDBAssoc::FindDBAssoc(const FreeFileSync::BaseDirMapping& baseMapping,
std::map<AssocKey, Utility::FileID>& assocDBLeftToRight) : assocDBLeftToRight_(assocDBLeftToRight)
{
try
{
std::pair<FreeFileSync::DirInfoPtr, FreeFileSync::DirInfoPtr> dbInfo =
FreeFileSync::loadFromDisk(baseMapping); //throw (FileError)
recurse(dbInfo.first->baseDirContainer,
dbInfo.second->baseDirContainer);
}
catch (...) {} //swallow...
}
void FindDBAssoc::recurse(const DirContainer& leftSide, const DirContainer& rightSide)
{
for (DirContainer::SubFileList::const_iterator i = leftSide.getSubFiles().begin(); i != leftSide.getSubFiles().end(); ++i)
{
const FileDescriptor& fileDescrI = i->second.getData();
if (!fileDescrI.fileIdentifier.isNull()) //fileIdentifier may be NULL
{
const DirContainer::SubFileList::const_iterator j = rightSide.getSubFiles().find(i->first);
//find files that exist on left and right
if (j != rightSide.getSubFiles().end())
{
const FileDescriptor& fileDescrJ = j->second.getData();
if (!fileDescrJ.fileIdentifier.isNull()) //fileIdentifier may be NULL
{
if ( fileDescrI.lastWriteTimeRaw == fileDescrJ.lastWriteTimeRaw &&
fileDescrI.fileSize == fileDescrJ.fileSize)
{
assocDBLeftToRight_[AssocKey(fileDescrI.fileIdentifier,
fileDescrI.lastWriteTimeRaw,
fileDescrI.fileSize)] = fileDescrJ.fileIdentifier;
}
}
}
}
}
//-----------------------------------------------------------------------------------------------
for (DirContainer::SubDirList::const_iterator i = leftSide.getSubDirs().begin(); i != leftSide.getSubDirs().end(); ++i)
{
const DirContainer::SubDirList::const_iterator j = rightSide.getSubDirs().find(i->first);
//directories that exist on both sides
if (j != rightSide.getSubDirs().end())
{
recurse(i->second, j->second); //recurse into subdirectories
}
}
}
class FindRenameCandidates
{
public:
FindRenameCandidates(FreeFileSync::BaseDirMapping& baseMapping)
{
FindDBAssoc(baseMapping,
assocDBLeftToRight);
if (!assocDBLeftToRight.empty())
recurse(baseMapping);
}
void getRenameCandidates(std::vector<std::pair<FileMapping*, FileMapping*> >& renameOnLeft,
std::vector<std::pair<FileMapping*, FileMapping*> >& renameOnRight);
private:
void recurse(HierarchyObject& hierObj)
{
//files
std::for_each(hierObj.subFiles.begin(), hierObj.subFiles.end(),
boost::bind(&FindRenameCandidates::processFile, this, _1));
//directories
std::for_each(hierObj.subDirs.begin(), hierObj.subDirs.end(),
boost::bind(&FindRenameCandidates::recurse, this, _1));//recursion
}
void processFile(FileMapping& fileObj)
{
switch (fileObj.getSyncOperation()) //evaluate comparison result and sync direction
{
case SO_CREATE_NEW_LEFT:
if (!fileObj.getFileID<RIGHT_SIDE>().isNull()) //fileIdentifier may be NULL
createLeft[FindDBAssoc::AssocKey(fileObj.getFileID<RIGHT_SIDE>(),
fileObj.getLastWriteTime<RIGHT_SIDE>(),
fileObj.getFileSize<RIGHT_SIDE>())] = &fileObj;
break;
case SO_CREATE_NEW_RIGHT:
if (!fileObj.getFileID<LEFT_SIDE>().isNull()) //fileIdentifier may be NULL
createRight.push_back(&fileObj);
break;
case SO_DELETE_LEFT:
if (!fileObj.getFileID<LEFT_SIDE>().isNull()) //fileIdentifier may be NULL
deleteLeft.push_back(&fileObj);
break;
case SO_DELETE_RIGHT:
if (!fileObj.getFileID<RIGHT_SIDE>().isNull()) //fileIdentifier may be NULL
deleteRight[FindDBAssoc::AssocKey(fileObj.getFileID<RIGHT_SIDE>(),
fileObj.getLastWriteTime<RIGHT_SIDE>(),
fileObj.getFileSize<RIGHT_SIDE>())] = &fileObj;
break;
case SO_OVERWRITE_RIGHT:
case SO_OVERWRITE_LEFT:
case SO_DO_NOTHING:
case SO_UNRESOLVED_CONFLICT:
break;
}
}
std::vector<FileMapping*> createRight; //pointer always bound!
std::vector<FileMapping*> deleteLeft; //
// |
// \|/
std::map<FindDBAssoc::AssocKey, Utility::FileID> assocDBLeftToRight;
// |
// \|/
std::map<FindDBAssoc::AssocKey, FileMapping*> deleteRight; //pointer always bound!
std::map<FindDBAssoc::AssocKey, FileMapping*> createLeft; //
};
void FindRenameCandidates::getRenameCandidates(
std::vector<std::pair<FileMapping*, FileMapping*> >& renameOnLeft,
std::vector<std::pair<FileMapping*, FileMapping*> >& renameOnRight)
{
for (std::vector<FileMapping*>::const_iterator crRightIter = createRight.begin();
crRightIter != createRight.end();
++crRightIter)
{
const FindDBAssoc::AssocKey assocDbKey((*crRightIter)->getFileID<LEFT_SIDE>(),
(*crRightIter)->getLastWriteTime<LEFT_SIDE>(),
(*crRightIter)->getFileSize<LEFT_SIDE>());
const std::map<FindDBAssoc::AssocKey, Utility::FileID>::const_iterator assocDBIter =
assocDBLeftToRight.find(assocDbKey);
if (assocDBIter != assocDBLeftToRight.end())
{
std::map<FindDBAssoc::AssocKey, FileMapping*>::const_iterator delRightIter =
deleteRight.find(FindDBAssoc::AssocKey(assocDBIter->second, //FileID of right side
assocDbKey.lastWriteTimeRaw_,
assocDbKey.fileSize_));
if (delRightIter != deleteRight.end())
{
renameOnRight.push_back(std::make_pair(*crRightIter, delRightIter->second));
}
}
}
//------------------------------------------------------------------------------------------------
for (std::vector<FileMapping*>::const_iterator delLeftIter = deleteLeft.begin();
delLeftIter != deleteLeft.end();
++delLeftIter)
{
const FindDBAssoc::AssocKey assocDbKey((*delLeftIter)->getFileID<LEFT_SIDE>(),
(*delLeftIter)->getLastWriteTime<LEFT_SIDE>(),
(*delLeftIter)->getFileSize<LEFT_SIDE>());
const std::map<FindDBAssoc::AssocKey, Utility::FileID>::const_iterator assocDBIter =
assocDBLeftToRight.find(assocDbKey);
if (assocDBIter != assocDBLeftToRight.end())
{
std::map<FindDBAssoc::AssocKey, FileMapping*>::const_iterator createLeftIter =
createLeft.find(FindDBAssoc::AssocKey(assocDBIter->second, //FileID of right side
assocDbKey.lastWriteTimeRaw_,
assocDbKey.fileSize_));
if (createLeftIter != createLeft.end())
{
renameOnLeft.push_back(std::make_pair(createLeftIter->second, *delLeftIter));
}
}
}
}
void FreeFileSync::getRenameCandidates(FreeFileSync::BaseDirMapping& baseMapping, //in
std::vector<std::pair<CreateOnLeft, DeleteOnLeft> >& renameOnLeft, //out
std::vector<std::pair<CreateOnRight, DeleteOnRight> >& renameOnRight) //out throw()!
{
FindRenameCandidates(baseMapping).getRenameCandidates(renameOnLeft, renameOnRight);
}
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