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// Copyright 2015 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_SETUP_UPDATE_ACTIVE_SETUP_VERSION_WORK_ITEM_H_
#define CHROME_INSTALLER_SETUP_UPDATE_ACTIVE_SETUP_VERSION_WORK_ITEM_H_
#include "base/macros.h"
#include "base/strings/string16.h"
#include "chrome/installer/util/set_reg_value_work_item.h"
#include "chrome/installer/util/work_item.h"
// A WorkItem that updates (or installs if not present) the Active Setup
// "Version" field in the registry. Optionally bumping the OS_UPGRADES component
// on demand. This WorkItem is only viable on machine-wide installs.
class UpdateActiveSetupVersionWorkItem : public WorkItem {
public:
// The components of the Active Setup Version entry, in order.
enum VersionComponent {
// The major version.
MAJOR,
// Unused component, always 0 for now.
UNUSED1,
// Number of OS upgrades handled since original install.
OS_UPGRADES,
// Unused component, always 0 for now.
UNUSED2,
};
// The operation to be performed by this UpdateActiveSetupVersionWorkItem.
enum Operation {
// Update (or install if not present) the Active Setup "Version" in the
// registry.
UPDATE,
// Also bump the OS_UPGRADES component on top of updating the version
// (will default to 1 if the version was absent or invalid).
UPDATE_AND_BUMP_OS_UPGRADES_COMPONENT,
};
// Constructs an UpdateActiveSetupVersionWorkItem that will perform
// |operation| on the |active_setup_path| key in the registry. This key needs
// to exist when this WorkItem is ran.
UpdateActiveSetupVersionWorkItem(const base::string16& active_setup_path,
Operation operation);
private:
// WorkItem:
bool DoImpl() override;
void RollbackImpl() override;
// Returns the updated Active Setup version to be used based on the
// |existing_version|.
base::string16 GetUpdatedActiveSetupVersion(
const base::string16& existing_version);
// The underlying WorkItem re-used to operate forward and backward on the
// registry.
SetRegValueWorkItem set_reg_value_work_item_;
// The Operation to be performed by this WorkItem when executed.
const Operation operation_;
DISALLOW_COPY_AND_ASSIGN(UpdateActiveSetupVersionWorkItem);
};
#endif // CHROME_INSTALLER_SETUP_UPDATE_ACTIVE_SETUP_VERSION_WORK_ITEM_H_