// 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_INSTALLER_UTIL_GOOGLE_UPDATE_UTIL_H_
#define CHROME_INSTALLER_UTIL_GOOGLE_UPDATE_UTIL_H_

#include <string>

namespace google_update {

// If user-level Google Update is absent, calls the system-level
// GoogleUpdateSetup.exe to install it, and waits until it finishes.
// Returns true if already installed, installed successfully, or
// if Google Update is not present at system-level.
// Returns false if the installation fails.
bool EnsureUserLevelGoogleUpdatePresent();

// Tell Google Update that an uninstall has taken place.  This gives it a chance
// to uninstall itself straight away if no more products are installed on the
// system rather than waiting for the next time the scheduled task runs.
// Returns false if Google Update could not be executed, or times out.
bool UninstallGoogleUpdate(bool system_install);

// Run setup.exe to attempt to reenable updates for for Chrome while elevating
// if needed. Setup.exe will call into
// GoogleUpdateSettings::ReenableAutoupdatesForApp() to do the work.
void ElevateIfNeededToReenableUpdates();

// Returns the value corresponding to |key| in untrusted data passed from
// Google Update.  Returns an empty string if |key| is absent or if its value
// contains non-printable characters.
std::string GetUntrustedDataValue(const std::string& key);

// Returns the value corresponding to |key| in untrusted data passed from
// |tag|.  |tag| should be a printable list of key-value pairs, e.g.
// "key1=value1&key2=value2".  Returns an empty string if |key| is absent or if
// its value contains non-printable characters.
std::string GetUntrustedDataValueFromTag(const std::string& tag,
                                         const std::string& key);

}  // namespace google_update

#endif  // CHROME_INSTALLER_UTIL_GOOGLE_UPDATE_UTIL_H_