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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_BROWSER_EXTENSIONS_EXTENSION_DATA_DELETER_H_
#define CHROME_BROWSER_EXTENSIONS_EXTENSION_DATA_DELETER_H_
#pragma once
#include "base/file_path.h"
#include "base/memory/ref_counted.h"
#include "base/string16.h"
#include "content/browser/browser_thread.h"
#include "googleurl/src/gurl.h"
namespace webkit_database {
class DatabaseTracker;
}
namespace fileapi {
class FileSystemContext;
}
namespace net {
class URLRequestContextGetter;
}
class ChromeAppCacheService;
class ExtensionSettingsBackend;
class Profile;
class WebKitContext;
// A helper class that takes care of removing local storage, databases and
// cookies for a given extension. This is used by
// ExtensionService::ClearExtensionData() upon uninstalling an extension.
class ExtensionDataDeleter
: public base::RefCountedThreadSafe<ExtensionDataDeleter,
BrowserThread::DeleteOnUIThread> {
public:
// Starts removing data. The extension should not be running when this is
// called. Cookies are deleted on the current thread, local storage and
// databases/settings are deleted asynchronously on the webkit and file
// threads, respectively. This function must be called from the UI thread.
static void StartDeleting(
Profile* profile,
const std::string& extension_id,
const GURL& storage_origin,
bool is_storage_isolated);
private:
friend struct BrowserThread::DeleteOnThread<BrowserThread::UI>;
friend class DeleteTask<ExtensionDataDeleter>;
ExtensionDataDeleter(
Profile* profile,
const std::string& extension_id,
const GURL& storage_origin,
bool is_storage_isolated);
~ExtensionDataDeleter();
// Deletes the cookies for the extension. May only be called on the io
// thread.
void DeleteCookiesOnIOThread();
// Deletes the database for the extension. May only be called on the file
// thread.
void DeleteDatabaseOnFileThread();
// Deletes local storage for the extension. May only be called on the webkit
// thread.
void DeleteLocalStorageOnWebkitThread();
// Deletes indexed db files for the extension. May only be called on the
// webkit thread.
void DeleteIndexedDBOnWebkitThread();
// Deletes filesystem files for the extension. May only be called on the
// file thread.
void DeleteFileSystemOnFileThread();
// Deletes appcache files for the extension. May only be called on the IO
// thread.
void DeleteAppcachesOnIOThread();
// Deletes extension settings for the extension. Will be called on the FILE
// thread via the ExtensionSettingsFrontend.
void DeleteExtensionSettingsOnFileThread(ExtensionSettingsBackend* backend);
// The ID of the extension being deleted.
const std::string extension_id_;
// The database context for deleting the database.
scoped_refptr<webkit_database::DatabaseTracker> database_tracker_;
// Provides access to the request context.
scoped_refptr<net::URLRequestContextGetter> extension_request_context_;
// The origin of the extension/app for which we're going to clear data.
GURL storage_origin_;
// The security origin identifier for which we're deleting stuff.
string16 origin_id_;
// Webkit context for accessing the DOM storage helper.
scoped_refptr<WebKitContext> webkit_context_;
scoped_refptr<fileapi::FileSystemContext> file_system_context_;
scoped_refptr<ChromeAppCacheService> appcache_service_;
// If non-empty, the extension we're deleting is an isolated app, and this
// is its directory which we should delete.
FilePath isolated_app_path_;
DISALLOW_COPY_AND_ASSIGN(ExtensionDataDeleter);
};
#endif // CHROME_BROWSER_EXTENSIONS_EXTENSION_DATA_DELETER_H_
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