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// Copyright (c) 2006-2008 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_COPY_TREE_WORK_ITEM_H__
#define CHROME_INSTALLER_UTIL_COPY_TREE_WORK_ITEM_H__
#include <string>
#include <windows.h>
#include "chrome/installer/util/work_item.h"
// A WorkItem subclass that recursively copies a file system hierarchy from
// source path to destination path. It also creates all necessary intermediate
// paths of the destination path if they do not exist. The file system
// hierarchy could be a single file, or a directory.
// Under the cover CopyTreeWorkItem moves the destination path, if existing,
// to the temporary directory passed in, and then copies the source hierarchy
// to the destination location. During rollback the original destination
// hierarchy is moved back.
class CopyTreeWorkItem : public WorkItem {
public:
virtual ~CopyTreeWorkItem();
virtual bool Do();
virtual void Rollback();
private:
friend class WorkItem;
// See comments on corresponding member varibles for the semantics of
// arguments.
// Notes on temp_path: to facilitate rollback, the caller needs to supply
// a temporary directory to save the original files if they exist under
// dest_path.
CopyTreeWorkItem(std::wstring source_path, std::wstring dest_path,
std::wstring temp_dir, CopyOverWriteOption overwrite_option,
std::wstring alternative_path);
// Checks if the path specified is in use (and hence can not be deleted)
bool IsFileInUse(std::wstring path);
// Get a backup path that can keep the original files under dest_path_,
// and set backup_path_ with the result.
bool GetBackupPath();
// Source path to copy files from.
std::wstring source_path_;
// Destination path to copy files to.
std::wstring dest_path_;
// Temporary directory that can be used.
std::wstring temp_dir_;
// Controls the behavior for overwriting.
CopyOverWriteOption overwrite_option_;
// If overwrite_option_ = NEW_NAME_IF_IN_USE, this variables stores the path
// to be used if the file is in use and hence we want to copy it to a
// different path.
std::wstring alternative_path_;
// Whether the source was copied to dest_path_
bool copied_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_;
// Whether the source was copied to alternative_path_ because dest_path_
// existed and was in use. Needed during rollback.
bool copied_to_alternate_path_;
// The full path in temporary directory that the original dest_path_ has
// been moved to.
std::wstring backup_path_;
};
#endif // CHROME_INSTALLER_UTIL_COPY_TREE_WORK_ITEM_H__
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