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// Copyright 2011 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_INSTALLER_UTIL_DELETE_TREE_WORK_ITEM_H_
#define CHROME_INSTALLER_UTIL_DELETE_TREE_WORK_ITEM_H_
#include "base/files/file_path.h"
#include "base/files/scoped_temp_dir.h"
#include "chrome/installer/util/work_item.h"
// A WorkItem subclass that recursively deletes a file system hierarchy at the
// given root path. The file system hierarchy could be a single file, or a
// directory.
// The file system hierarchy to be deleted can have one or more key files. If
// specified, deletion will be performed only if all key files are not in use.
class DeleteTreeWorkItem : public WorkItem {
public:
~DeleteTreeWorkItem() override;
private:
friend class WorkItem;
// |root_path| will be moved to |temp_path| (rather than copied there and then
// deleted). For best results in this case, |root_path| and |temp_path|
// should be on the same volume; otherwise, the move will be simulated
// by a copy-and-delete operation.
DeleteTreeWorkItem(const base::FilePath& root_path,
const base::FilePath& temp_path);
// WorkItem:
bool DoImpl() override;
void RollbackImpl() override;
// Return temporary path for work based on |backup_path_| and |root_path_|.
const base::FilePath& GetBackupPath();
// Attempts to delete |root_path_|. Returns true on success.
bool DeleteRoot();
// Attempts to move |root_path_| to backup. Returns true on success.
bool MoveRootToBackup();
// Root path to delete.
const base::FilePath root_path_;
// Temporary directory that can be used.
const base::FilePath temp_path_;
// The temporary directory into which the original root_path_ has been moved.
base::ScopedTempDir backup_dir_;
// Caches the return value of GetBackupPath(). This is empty if |backup_dir_|
// has not been created.
base::FilePath backup_path_;
// Set to true once root_path_ has been moved into backup_path_.
bool moved_to_backup_ = false;
};
#endif // CHROME_INSTALLER_UTIL_DELETE_TREE_WORK_ITEM_H_
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