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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_COPY_TREE_WORK_ITEM_H_
#define CHROME_INSTALLER_UTIL_COPY_TREE_WORK_ITEM_H_
#pragma once
#include <string>
#include <windows.h>
#include "base/file_path.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(const std::wstring& source_path,
const std::wstring& dest_path,
const std::wstring& temp_dir,
CopyOverWriteOption overwrite_option,
const std::wstring& alternative_path);
// Checks if the path specified is in use (and hence can not be deleted)
bool IsFileInUse(const FilePath& 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.
FilePath source_path_;
// Destination path to copy files to.
FilePath dest_path_;
// Temporary directory that can be used.
FilePath 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.
FilePath 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.
FilePath backup_path_;
};
#endif // CHROME_INSTALLER_UTIL_COPY_TREE_WORK_ITEM_H_
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