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// Copyright (c) 2012 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_BROWSER_EXTENSIONS_EXTENSION_GARBAGE_COLLECTOR_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_GARBAGE_COLLECTOR_H_
#pragma once
#include <set>
#include "base/file_path.h"
class ExtensionService;
// Garbage collection for extensions. This will delete any directories in the
// installation directory of |extension_service_| that aren't valid, as well
// as removing any references in the preferences to extensions that are
// missing local content.
namespace extensions {
class ExtensionGarbageCollector {
public:
explicit ExtensionGarbageCollector(ExtensionService* extension_service);
virtual ~ExtensionGarbageCollector();
// Begin garbage collection; fetch the installed extensions' ids.
void GarbageCollectExtensions();
private:
// Check the installation directory for directories with invalid extension
// ids, deleting them if found. Call CheckExtensionPreferences with a list of
// present directories.
void CheckExtensionDirectoriesOnBackgroundThread(
const FilePath& installation_directory);
// Check for any extension directories which:
// - Are an old version of a current extension;
// - Are present in the preferences but not on the file system;
// - Are present on the file system, but not in the preferences
// and delete them if found.
void CheckExtensionPreferences(const std::set<FilePath>& extension_paths);
// Helper function to cleanup any old versions of an extension in the
// extension's base directory.
void CleanupOldVersionsOnBackgroundThread(
const FilePath& path, const FilePath& current_version);
ExtensionService* extension_service_;
};
} // namespace extensions
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_GARBAGE_COLLECTOR_H_
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