// Copyright (c) 2006-2008 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.
//
// See the corresponding header file for description of the functions in this
// file.

#include "install_util.h"

#include <windows.h>

#include "base/logging.h"
#include "base/registry.h"
#include "base/string_util.h"
#include "chrome/installer/util/browser_distribution.h"
#include "chrome/installer/util/google_update_constants.h"


installer::Version* InstallUtil::GetChromeVersion(bool system_install) {
  RegKey key;
  std::wstring version_str;

  HKEY reg_root = (system_install) ? HKEY_LOCAL_MACHINE : HKEY_CURRENT_USER;
  BrowserDistribution* dist = BrowserDistribution::GetDistribution();
  if (!key.Open(reg_root, dist->GetVersionKey().c_str(), KEY_READ) ||
      !key.ReadValue(google_update::kRegVersionField, &version_str)) {
    LOG(INFO) << "No existing Chrome install found.";
    key.Close();
    return NULL;
  }
  key.Close();
  LOG(INFO) << "Existing Chrome version found " << version_str;
  return installer::Version::GetVersionFromString(version_str);
}