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authorDaniel Wilhelm <daniel@wili.li>2014-04-18 17:29:28 +0200
committerDaniel Wilhelm <daniel@wili.li>2014-04-18 17:29:28 +0200
commit75c07011b7c4d06acd7b45dabdcd60ab9d80f385 (patch)
tree8853c3978dd152ef377e652239448b1352320206 /lib/versioning.h
parent5.22 (diff)
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diff --git a/lib/versioning.h b/lib/versioning.h
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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) Zenju (zenju AT gmx DOT de) - All Rights Reserved *
-// **************************************************************************
-
-#ifndef VERSIONING_HEADER_8760247652438056
-#define VERSIONING_HEADER_8760247652438056
-
-#include <vector>
-#include <functional>
-#include <zen/time.h>
-#include <zen/zstring.h>
-#include <zen/int64.h>
-#include <zen/file_error.h>
-#include "../structures.h"
-
-namespace zen
-{
-struct CallbackMoveDir;
-struct CallbackMoveFile;
-
-//e.g. move C:\Source\subdir\Sample.txt -> D:\Revisions\subdir\Sample.txt 2012-05-15 131513.txt
-//scheme: <revisions directory>\<relpath>\<filename>.<ext> YYYY-MM-DD HHMMSS.<ext>
-/*
- - ignores missing source files/dirs
- - creates missing intermediate directories
- - does not create empty directories
- - handles symlinks
- - replaces already existing target files/dirs (supports retry)
- => (unlikely) risk of data loss for naming convention "versioning":
- race-condition if two FFS instances start at the very same second OR multiple folder pairs process the same filename!!
-*/
-
-class FileVersioner
-{
-public:
- FileVersioner(const Zstring& versioningDirectory, //throw FileError
- VersioningStyle versioningStyle,
- const TimeComp& timeStamp) : //max versions per file; < 0 := no limit
- versioningStyle_(versioningStyle),
- versioningDirectory_(versioningDirectory),
- timeStamp_(formatTime<Zstring>(Zstr("%Y-%m-%d %H%M%S"), timeStamp)) //e.g. "2012-05-15 131513"
- {
- if (timeStamp_.size() != 17) //formatTime() returns empty string on error; unexpected length: e.g. problem in year 10000!
- throw FileError(_("Unable to create timestamp for versioning:") + L" \"" + timeStamp_ + L"\"");
- }
-
- bool revisionFile(const Zstring& fullName, const Zstring& relativeName, CallbackMoveFile& callback); //throw FileError; return "false" if file is not existing
- void revisionDir (const Zstring& fullName, const Zstring& relativeName, CallbackMoveDir& callback); //throw FileError
-
- //void limitVersions(std::function<void()> updateUI); //throw FileError; call when done revisioning!
-
-private:
- bool revisionFileImpl(const Zstring& fullName, const Zstring& relativeName, CallbackMoveDir& callback); //throw FileError
- void revisionDirImpl (const Zstring& fullName, const Zstring& relativeName, CallbackMoveDir& callback); //throw FileError
-
- const VersioningStyle versioningStyle_;
- const Zstring versioningDirectory_;
- const Zstring timeStamp_;
-
- //std::vector<Zstring> fileRelNames; //store list of revisioned file and symlink relative names for limitVersions()
-};
-
-
-struct CallbackMoveFile //see CallbackCopyFile for limitations when throwing exceptions!
-{
- virtual ~CallbackMoveFile() {}
- virtual void updateStatus(Int64 bytesDelta) = 0; //called frequently if move has to revert to copy + delete:
-};
-
-struct CallbackMoveDir //see CallbackCopyFile for limitations when throwing exceptions!
-{
- virtual ~CallbackMoveDir() {}
-
- virtual void onBeforeFileMove(const Zstring& fileFrom, const Zstring& fileTo) = 0; //one call for each *existing* object!
- virtual void onBeforeDirMove (const Zstring& dirFrom, const Zstring& dirTo ) = 0; //
- virtual void updateStatus(Int64 bytesDelta) = 0; //called frequently if move has to revert to copy + delete:
-};
-
-
-
-namespace impl //declare for unit tests:
-{
-bool isMatchingVersion(const Zstring& shortname, const Zstring& shortnameVersion);
-}
-}
-
-#endif //VERSIONING_HEADER_8760247652438056
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