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// Copyright 2015 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/system/system_clock.h"
#include <memory>
#include "base/functional/bind.h"
#include "base/logging.h"
#include "chrome/browser/ash/ownership/owner_settings_service_ash.h"
#include "chrome/browser/ash/ownership/owner_settings_service_ash_factory.h"
#include "chrome/browser/ash/profiles/profile_helper.h"
#include "chrome/browser/ash/system/system_clock_observer.h"
#include "chrome/common/pref_names.h"
#include "chromeos/ash/components/browser_context_helper/annotated_account_id.h"
#include "chromeos/ash/components/install_attributes/install_attributes.h"
#include "chromeos/ash/components/settings/cros_settings.h"
#include "chromeos/ash/components/settings/cros_settings_names.h"
#include "components/account_id/account_id.h"
#include "components/prefs/pref_change_registrar.h"
#include "components/prefs/pref_service.h"
#include "components/user_manager/user.h"
#include "components/user_manager/user_manager.h"
#include "components/user_manager/user_type.h"
namespace ash::system {
SystemClock::SystemClock() {
device_settings_observer_ = CrosSettings::Get()->AddSettingsObserver(
kSystemUse24HourClock,
base::BindRepeating(&SystemClock::OnSystemPrefChanged,
weak_ptr_factory_.GetWeakPtr()));
user_manager::UserManager::Get()->AddSessionStateObserver(this);
}
SystemClock::~SystemClock() {
if (user_manager::UserManager::IsInitialized())
user_manager::UserManager::Get()->RemoveSessionStateObserver(this);
}
void SystemClock::OnProfileWillBeDestroyed(Profile* profile) {
DCHECK(profile_observation_.IsObservingSource(profile));
profile_observation_.Reset();
user_pref_registrar_.reset();
}
void SystemClock::ActiveUserChanged(user_manager::User* active_user) {
if (!active_user)
return;
active_user->AddProfileCreatedObserver(
base::BindOnce(&SystemClock::SetProfileByUser,
weak_ptr_factory_.GetWeakPtr(), active_user));
}
void SystemClock::AddObserver(SystemClockObserver* observer) {
observer_list_.AddObserver(observer);
}
void SystemClock::RemoveObserver(SystemClockObserver* observer) {
observer_list_.RemoveObserver(observer);
}
void SystemClock::SetProfileByUser(const user_manager::User* user) {
SetProfile(ProfileHelper::Get()->GetProfileByUser(user));
}
void SystemClock::SetProfile(Profile* profile) {
profile_observation_.Reset();
profile_observation_.Observe(profile);
PrefService* prefs = profile->GetPrefs();
user_pref_registrar_ = std::make_unique<PrefChangeRegistrar>();
user_pref_registrar_->Init(prefs);
user_pref_registrar_->Add(prefs::kUse24HourClock,
base::BindRepeating(&SystemClock::OnUserPrefChanged,
base::Unretained(this)));
NotifySystemClockTypeChanged();
}
SystemClock::ScopedHourClockType::ScopedHourClockType(
base::WeakPtr<SystemClock> system_clock)
: system_clock_(std::move(system_clock)) {}
SystemClock::ScopedHourClockType::~ScopedHourClockType() {
if (!system_clock_)
return;
system_clock_->scoped_hour_clock_type_.reset();
system_clock_->NotifySystemClockTypeChanged();
}
SystemClock::ScopedHourClockType::ScopedHourClockType(
ScopedHourClockType&& other) = default;
SystemClock::ScopedHourClockType& SystemClock::ScopedHourClockType::operator=(
ScopedHourClockType&& other) = default;
void SystemClock::ScopedHourClockType::UpdateClockType(
base::HourClockType clock_type) {
if (!system_clock_)
return;
system_clock_->scoped_hour_clock_type_ = clock_type;
system_clock_->NotifySystemClockTypeChanged();
}
SystemClock::ScopedHourClockType SystemClock::CreateScopedHourClockType(
base::HourClockType hour_clock_type) {
DCHECK(!scoped_hour_clock_type_.has_value());
scoped_hour_clock_type_ = hour_clock_type;
NotifySystemClockTypeChanged();
return ScopedHourClockType(weak_ptr_factory_.GetWeakPtr());
}
bool SystemClock::ShouldUse24HourClockForUser(const AccountId& user_id) const {
// System value is used for kUse24HourClock preference on login screen and
// whenever set so in user's preference
const CrosSettings* const cros_settings = CrosSettings::Get();
bool system_use_24_hour_clock = true;
const bool system_value_found = cros_settings->GetBoolean(
kSystemUse24HourClock, &system_use_24_hour_clock);
const bool system_value =
system_value_found ? system_use_24_hour_clock
: (base::GetHourClockType() == base::k24HourClock);
const user_manager::User* const user =
user_manager::UserManager::Get()->FindUser(user_id);
if (!user || !user->GetProfilePrefs()) {
return system_value;
}
const PrefService::Preference* user_pref =
user->GetProfilePrefs()->FindPreference(prefs::kUse24HourClock);
if (user_pref->IsDefaultValue()) {
// Non-regular users or owner use `system_value`. Owner uses `system_value`
// to mitigate the edge case where owner data is lost because `system_value`
// should always be consistent with the (lost) owner data.
if (user->GetType() != user_manager::UserType::kRegular ||
user_manager::UserManager::Get()->IsOwnerUser(user)) {
return system_value;
}
// Regular users use `system_value` on managed devices where `system_value`
// is from device policy.
DCHECK_EQ(user->GetType(), user_manager::UserType::kRegular);
if (ash::InstallAttributes::Get()->IsEnterpriseManaged()) {
return system_value;
}
}
return user_pref->GetValue()->GetIfBool().value_or(true);
}
bool SystemClock::ShouldUse24HourClock() const {
if (scoped_hour_clock_type_.has_value()) {
return scoped_hour_clock_type_ == base::k24HourClock;
}
user_manager::User* const active_user =
user_manager::UserManager::Get()->GetActiveUser();
return ShouldUse24HourClockForUser(active_user ? active_user->GetAccountId()
: EmptyAccountId());
}
void SystemClock::OnSystemPrefChanged() {
NotifySystemClockTypeChanged();
}
void SystemClock::OnUserPrefChanged() {
// It apparently sometimes takes a while after login before the current user
// is recognized as the owner. Make sure that the system-wide clock setting
// is updated when the recognition eventually happens (crbug.com/278601).
// This also works for enterprise-managed devices because they never have
// a local owner.
const AccountId* user_id =
ash::AnnotatedAccountId::Get(profile_observation_.GetSource());
if (user_id) {
user_manager::UserManager::Get()->GetOwnerAccountIdAsync(
base::BindOnce(&SystemClock::MaybeCopyToOwnerSettings,
weak_ptr_factory_.GetWeakPtr(), *user_id));
}
NotifySystemClockTypeChanged();
}
void SystemClock::MaybeCopyToOwnerSettings(const AccountId& updating_user_id,
const AccountId& owner_id) {
if (updating_user_id != owner_id) {
// Non owner user.
return;
}
const bool use_24_hour_clock = ShouldUse24HourClockForUser(updating_user_id);
const user_manager::User* const user =
user_manager::UserManager::Get()->FindUser(updating_user_id);
if (!user) {
return; // May occur if not running on a device.
}
Profile* const profile = ProfileHelper::Get()->GetProfileByUser(user);
if (!profile) {
return; // May occur in tests or if not running on a device.
}
OwnerSettingsServiceAsh* const service =
OwnerSettingsServiceAshFactory::GetForBrowserContext(profile);
CHECK(service);
service->SetBoolean(kSystemUse24HourClock, use_24_hour_clock);
}
void SystemClock::NotifySystemClockTypeChanged() {
for (auto& observer : observer_list_)
observer.OnSystemClockChanged(this);
}
} // namespace ash::system
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