chrome/browser/ui/webui/help/version_updater_chromeos.cc

// 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.

#include "chrome/browser/ui/webui/help/version_updater_chromeos.h"

#include <cmath>

#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/strings/string16.h"
#include "base/strings/string_number_conversions.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chromeos/login/startup_utils.h"
#include "chrome/browser/chromeos/login/wizard_controller.h"
#include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos.h"
#include "chrome/browser/chromeos/ownership/owner_settings_service_chromeos_factory.h"
#include "chrome/browser/chromeos/settings/cros_settings.h"
#include "chrome/browser/ui/webui/help/help_utils_chromeos.h"
#include "chrome/grit/generated_resources.h"
#include "chromeos/dbus/dbus_thread_manager.h"
#include "chromeos/dbus/power/power_manager_client.h"
#include "chromeos/network/network_handler.h"
#include "chromeos/network/network_state.h"
#include "chromeos/network/network_state_handler.h"
#include "chromeos/network/network_type_pattern.h"
#include "chromeos/settings/cros_settings_names.h"
#include "chromeos/strings/grit/chromeos_strings.h"
#include "content/public/browser/web_contents.h"
#include "third_party/cros_system_api/dbus/service_constants.h"
#include "ui/base/l10n/l10n_util.h"

using chromeos::CrosSettings;
using chromeos::DBusThreadManager;
using chromeos::OwnerSettingsServiceChromeOS;
using chromeos::OwnerSettingsServiceChromeOSFactory;
using chromeos::UpdateEngineClient;
using chromeos::WizardController;

namespace {

// Network status in the context of device update.
enum NetworkStatus {
  // It's allowed to use current network for update.
  NETWORK_STATUS_ALLOWED = 0,
  // It's disallowed to use current network for update.
  NETWORK_STATUS_DISALLOWED,
  // Device is in offline state.
  NETWORK_STATUS_OFFLINE
};

const bool kDefaultAutoUpdateDisabled = false;

NetworkStatus GetNetworkStatus(bool interactive,
                               const chromeos::NetworkState* network,
                               bool metered) {
  if (!network || !network->IsConnectedState())  // Offline state.
    return NETWORK_STATUS_OFFLINE;

  if (metered &&
      !help_utils_chromeos::IsUpdateOverCellularAllowed(interactive)) {
    return NETWORK_STATUS_DISALLOWED;
  }
  return NETWORK_STATUS_ALLOWED;
}

// Returns true if auto-update is disabled by the system administrator.
bool IsAutoUpdateDisabled() {
  bool update_disabled = kDefaultAutoUpdateDisabled;
  chromeos::CrosSettings* settings = chromeos::CrosSettings::Get();
  if (!settings)
    return update_disabled;
  const base::Value* update_disabled_value =
      settings->GetPref(chromeos::kUpdateDisabled);
  if (update_disabled_value)
    CHECK(update_disabled_value->GetAsBoolean(&update_disabled));
  return update_disabled;
}

base::string16 GetConnectionTypeAsUTF16(const chromeos::NetworkState* network,
                                        bool metered) {
  const std::string type = network->type();
  if (chromeos::NetworkTypePattern::WiFi().MatchesType(type)) {
    if (metered)
      return l10n_util::GetStringUTF16(IDS_NETWORK_TYPE_METERED_WIFI);
    return l10n_util::GetStringUTF16(IDS_NETWORK_TYPE_WIFI);
  }
  if (chromeos::NetworkTypePattern::Ethernet().MatchesType(type))
    return l10n_util::GetStringUTF16(IDS_NETWORK_TYPE_ETHERNET);
  if (chromeos::NetworkTypePattern::Mobile().MatchesType(type))
    return l10n_util::GetStringUTF16(IDS_NETWORK_TYPE_MOBILE_DATA);
  if (chromeos::NetworkTypePattern::VPN().MatchesType(type))
    return l10n_util::GetStringUTF16(IDS_NETWORK_TYPE_VPN);
  NOTREACHED();
  return base::string16();
}

// Returns whether an update is allowed. If not, it calls the callback with
// the appropriate status. |interactive| indicates whether the user is actively
// checking for updates.
bool EnsureCanUpdate(bool interactive,
                     const VersionUpdater::StatusCallback& callback) {
  if (IsAutoUpdateDisabled()) {
    callback.Run(VersionUpdater::DISABLED_BY_ADMIN, 0, false, false,
                 std::string(), 0,
                 l10n_util::GetStringUTF16(IDS_UPGRADE_DISABLED_BY_POLICY));
    return false;
  }

  chromeos::NetworkStateHandler* network_state_handler =
      chromeos::NetworkHandler::Get()->network_state_handler();
  const chromeos::NetworkState* network =
      network_state_handler->DefaultNetwork();
  const bool metered = network_state_handler->default_network_is_metered();
  // Don't allow an update if we're currently offline or connected
  // to a network for which updates are disallowed.
  NetworkStatus status = GetNetworkStatus(interactive, network, metered);
  if (status == NETWORK_STATUS_OFFLINE) {
    callback.Run(VersionUpdater::FAILED_OFFLINE, 0, false, false, std::string(),
                 0, l10n_util::GetStringUTF16(IDS_UPGRADE_OFFLINE));
    return false;
  } else if (status == NETWORK_STATUS_DISALLOWED) {
    base::string16 message = l10n_util::GetStringFUTF16(
        IDS_UPGRADE_DISALLOWED, GetConnectionTypeAsUTF16(network, metered));
    callback.Run(VersionUpdater::FAILED_CONNECTION_TYPE_DISALLOWED, 0, false,
                 false, std::string(), 0, message);
    return false;
  }

  return true;
}

}  // namespace

VersionUpdater* VersionUpdater::Create(content::WebContents* web_contents) {
  return new VersionUpdaterCros(web_contents);
}

void VersionUpdaterCros::GetUpdateStatus(StatusCallback callback) {
  callback_ = std::move(callback);

  // User is not actively checking for updates.
  if (!EnsureCanUpdate(false /* interactive */, callback_))
    return;

  UpdateEngineClient* update_engine_client =
      DBusThreadManager::Get()->GetUpdateEngineClient();
  if (!update_engine_client->HasObserver(this))
    update_engine_client->AddObserver(this);

  this->UpdateStatusChanged(
      DBusThreadManager::Get()->GetUpdateEngineClient()->GetLastStatus());
}

void VersionUpdaterCros::CheckForUpdate(StatusCallback callback,
                                        PromoteCallback) {
  callback_ = std::move(callback);

  // User is actively checking for updates.
  if (!EnsureCanUpdate(true /* interactive */, callback_))
    return;

  UpdateEngineClient* update_engine_client =
      DBusThreadManager::Get()->GetUpdateEngineClient();
  if (!update_engine_client->HasObserver(this))
    update_engine_client->AddObserver(this);

  if (update_engine_client->GetLastStatus().current_operation() !=
      update_engine::Operation::IDLE) {
    check_for_update_when_idle_ = true;
    return;
  }
  check_for_update_when_idle_ = false;

  // Make sure that libcros is loaded and OOBE is complete.
  if (!WizardController::default_controller() ||
      chromeos::StartupUtils::IsDeviceRegistered()) {
    update_engine_client->RequestUpdateCheck(base::BindOnce(
        &VersionUpdaterCros::OnUpdateCheck, weak_ptr_factory_.GetWeakPtr()));
  }
}

void VersionUpdaterCros::SetChannel(const std::string& channel,
                                    bool is_powerwash_allowed) {
  OwnerSettingsServiceChromeOS* service =
      context_
          ? OwnerSettingsServiceChromeOSFactory::GetInstance()
                ->GetForBrowserContext(context_)
          : nullptr;
  // For local owner set the field in the policy blob.
  if (service)
    service->SetString(chromeos::kReleaseChannel, channel);
  DBusThreadManager::Get()->GetUpdateEngineClient()->
      SetChannel(channel, is_powerwash_allowed);
}

void VersionUpdaterCros::SetUpdateOverCellularOneTimePermission(
    StatusCallback callback,
    const std::string& update_version,
    int64_t update_size) {
  callback_ = std::move(callback);
  DBusThreadManager::Get()
      ->GetUpdateEngineClient()
      ->SetUpdateOverCellularOneTimePermission(
          update_version, update_size,
          base::BindOnce(
              &VersionUpdaterCros::OnSetUpdateOverCellularOneTimePermission,
              weak_ptr_factory_.GetWeakPtr()));
}

void VersionUpdaterCros::OnSetUpdateOverCellularOneTimePermission(
    bool success) {
  if (success) {
    // One time permission is set successfully, so we can proceed to update.
    CheckForUpdate(callback_, VersionUpdater::PromoteCallback());
  } else {
    // TODO(https://crbug.com/927452): invoke callback to signal about page to
    // show appropriate error message.
    LOG(ERROR) << "Error setting update over cellular one time permission.";
    callback_.Run(VersionUpdater::FAILED, 0, false, false, std::string(), 0,
                  base::string16());
  }
}

void VersionUpdaterCros::GetChannel(bool get_current_channel,
                                    ChannelCallback cb) {
  UpdateEngineClient* update_engine_client =
      DBusThreadManager::Get()->GetUpdateEngineClient();

  // Request the channel information. Bind to a weak_ptr bound method rather
  // than passing |cb| directly so that |cb| does not outlive |this|.
  update_engine_client->GetChannel(
      get_current_channel,
      base::BindOnce(&VersionUpdaterCros::OnGetChannel,
                     weak_ptr_factory_.GetWeakPtr(), std::move(cb)));
}

void VersionUpdaterCros::OnGetChannel(ChannelCallback cb,
                                      const std::string& current_channel) {
  std::move(cb).Run(current_channel);
}

void VersionUpdaterCros::GetEolInfo(EolInfoCallback cb) {
  UpdateEngineClient* update_engine_client =
      DBusThreadManager::Get()->GetUpdateEngineClient();

  // Request the EolInfo. Bind to a weak_ptr bound method rather than passing
  // |cb| directly so that |cb| does not outlive |this|.
  update_engine_client->GetEolInfo(
      base::BindOnce(&VersionUpdaterCros::OnGetEolInfo,
                     weak_ptr_factory_.GetWeakPtr(), std::move(cb)));
}

void VersionUpdaterCros::OnGetEolInfo(
    EolInfoCallback cb,
    chromeos::UpdateEngineClient::EolInfo eol_info) {
  std::move(cb).Run(std::move(eol_info));
}

VersionUpdaterCros::VersionUpdaterCros(content::WebContents* web_contents)
    : context_(web_contents ? web_contents->GetBrowserContext() : nullptr),
      last_operation_(update_engine::Operation::IDLE),
      check_for_update_when_idle_(false) {}

VersionUpdaterCros::~VersionUpdaterCros() {
  UpdateEngineClient* update_engine_client =
      DBusThreadManager::Get()->GetUpdateEngineClient();
  update_engine_client->RemoveObserver(this);
}

void VersionUpdaterCros::UpdateStatusChanged(
    const update_engine::StatusResult& status) {
  Status my_status = UPDATED;
  int progress = 0;
  std::string version = status.new_version();
  int64_t size = status.new_size();
  base::string16 message;

  // If the updater is currently idle, just show the last operation (unless it
  // was previously checking for an update -- in that case, the system is
  // up to date now).  See http://crbug.com/120063 for details.
  update_engine::Operation operation_to_show = status.current_operation();
  if (status.current_operation() == update_engine::Operation::IDLE &&
      last_operation_ != update_engine::Operation::CHECKING_FOR_UPDATE) {
    operation_to_show = last_operation_;
  }

  switch (operation_to_show) {
    case update_engine::Operation::IDLE:
    case update_engine::Operation::DISABLED:
    case update_engine::Operation::ERROR:
    case update_engine::Operation::REPORTING_ERROR_EVENT:
    case update_engine::Operation::ATTEMPTING_ROLLBACK:
      // This path previously used the FAILED status and IDS_UPGRADE_ERROR, but
      // the update engine reports errors for some conditions that shouldn't
      // actually be displayed as errors to users: http://crbug.com/146919.
      // Just use the UPDATED status instead.
      break;
    case update_engine::Operation::CHECKING_FOR_UPDATE:
      my_status = CHECKING;
      break;
    case update_engine::Operation::DOWNLOADING:
      progress = static_cast<int>(round(status.progress() * 100));
      FALLTHROUGH;
    case update_engine::Operation::UPDATE_AVAILABLE:
      my_status = UPDATING;
      break;
    case update_engine::Operation::NEED_PERMISSION_TO_UPDATE:
      my_status = NEED_PERMISSION_TO_UPDATE;
      break;
    case update_engine::Operation::VERIFYING:
    case update_engine::Operation::FINALIZING:
      // Once the download is finished, keep the progress at 100; it shouldn't
      // go down while the status is the same.
      progress = 100;
      my_status = UPDATING;
      break;
    case update_engine::Operation::UPDATED_NEED_REBOOT:
      my_status = NEARLY_UPDATED;
      break;
    default:
      NOTREACHED();
  }

  callback_.Run(my_status, progress, status.is_enterprise_rollback(),
                status.will_powerwash_after_reboot(), version, size, message);
  last_operation_ = status.current_operation();

  if (check_for_update_when_idle_ &&
      status.current_operation() == update_engine::Operation::IDLE) {
    CheckForUpdate(callback_, VersionUpdater::PromoteCallback());
  }
}

void VersionUpdaterCros::OnUpdateCheck(
    UpdateEngineClient::UpdateCheckResult result) {
  // If version updating is not implemented, this binary is the most up-to-date
  // possible with respect to automatic updating.
  if (result == UpdateEngineClient::UPDATE_RESULT_NOTIMPLEMENTED)
    callback_.Run(UPDATED, 0, false, false, std::string(), 0, base::string16());
}