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// Copyright (c) 2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_INSTALLER_UTIL_MOVE_TREE_WORK_ITEM_H_
#define CHROME_INSTALLER_UTIL_MOVE_TREE_WORK_ITEM_H_
#include <string>
#include <windows.h>
#include "chrome/installer/util/work_item.h"
// A WorkItem subclass that recursively move a file system hierarchy from
// source path to destination path. The file system hierarchy could be a
// single file, or a directory.
//
// Under the cover MoveTreeWorkItem moves the destination path, if existing,
// to the temporary directory passed in, and then moves the source hierarchy
// to the destination location. During rollback the original destination
// hierarchy is moved back.
class MoveTreeWorkItem : public WorkItem {
public:
virtual ~MoveTreeWorkItem();
virtual bool Do();
virtual void Rollback();
private:
friend class WorkItem;
// source_path specifies file or directory that will be moved to location
// specified by dest_path. To facilitate rollback, the caller needs to supply
// a temporary directory (temp_dir) to save the original files if they exist
// under dest_path.
MoveTreeWorkItem(const std::wstring& source_path,
const std::wstring& dest_path,
const std::wstring& temp_dir);
// Source path to move files from.
std::wstring source_path_;
// Destination path to move files to.
std::wstring dest_path_;
// Temporary directory to backup dest_path_ (if it already exists).
std::wstring temp_dir_;
// The full path in temp_dir_ where the original dest_path_ has
// been moved to.
std::wstring backup_path_;
// Whether the source was moved to dest_path_
bool moved_to_dest_path_;
// Whether the original files have been moved to backup path under
// temporary directory. If true, moving back is needed during rollback.
bool moved_to_backup_;
};
#endif // CHROME_INSTALLER_UTIL_MOVE_TREE_WORK_ITEM_H_
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