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// Copyright (c) 2011 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_DELETE_TREE_WORK_ITEM_H_
#define CHROME_INSTALLER_UTIL_DELETE_TREE_WORK_ITEM_H_
#include <vector>
#include "base/files/file_path.h"
#include "base/files/scoped_temp_dir.h"
#include "base/memory/scoped_ptr.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;
bool Do() override;
void Rollback() override;
private:
friend class WorkItem;
DeleteTreeWorkItem(const base::FilePath& root_path,
const base::FilePath& temp_path,
const std::vector<base::FilePath>& key_paths);
// Root path to delete.
base::FilePath root_path_;
// Temporary directory that can be used.
base::FilePath temp_path_;
// The number of key files.
ptrdiff_t num_key_files_;
// Contains the paths to the key files. If specified, deletion will be
// performed only if none of the key files are in use.
scoped_ptr<base::FilePath[]> key_paths_;
// Contains the temp directories for the backed-up key files. The directories
// are created and populated in Do() as-needed. We don't use a standard
// container for this since base::ScopedTempDir isn't CopyConstructible.
scoped_ptr<base::ScopedTempDir[]> key_backup_paths_;
// The temporary directory into which the original root_path_ has been moved.
base::ScopedTempDir backup_path_;
// Set to true once root_path_ has been copied into backup_path_.
bool copied_to_backup_;
};
#endif // CHROME_INSTALLER_UTIL_DELETE_TREE_WORK_ITEM_H_
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