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// Copyright 2016 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/settings/chromeos/date_time_handler.h"
#include "ash/public/cpp/login_screen.h"
#include "ash/public/cpp/login_types.h"
#include "base/bind.h"
#include "base/command_line.h"
#include "base/logging.h"
#include "base/time/time.h"
#include "base/values.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/browser_process_platform_part.h"
#include "chrome/browser/chromeos/child_accounts/parent_access_code/parent_access_service.h"
#include "chrome/browser/chromeos/set_time_dialog.h"
#include "chrome/browser/chromeos/system/timezone_resolver_manager.h"
#include "chrome/browser/chromeos/system/timezone_util.h"
#include "chrome/common/chrome_features.h"
#include "chrome/common/pref_names.h"
#include "chromeos/constants/chromeos_switches.h"
#include "chromeos/dbus/system_clock/system_clock_client.h"
#include "chromeos/settings/timezone_settings.h"
#include "components/policy/proto/chrome_device_policy.pb.h"
#include "components/prefs/pref_service.h"
#include "components/user_manager/user_manager.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_ui.h"
#include "content/public/browser/web_ui_data_source.h"
namespace chromeos {
namespace settings {
namespace {
// Returns whether the system's automatic time zone detection setting is
// managed, which may override the user's setting.
bool IsSystemTimezoneAutomaticDetectionManaged() {
return g_browser_process->local_state()->IsManagedPreference(
prefs::kSystemTimezoneAutomaticDetectionPolicy);
}
// Returns the system's automatic time zone detection policy value, which
// corresponds to the SystemTimezoneProto's AutomaticTimezoneDetectionType
// enum and determines whether the user's setting will be overridden.
int GetSystemTimezoneAutomaticDetectionPolicyValue() {
DCHECK(IsSystemTimezoneAutomaticDetectionManaged());
return g_browser_process->local_state()->GetInteger(
prefs::kSystemTimezoneAutomaticDetectionPolicy);
}
// Returns whether the user can set the automatic detection setting, based on
// flags and policies.
bool IsTimezoneAutomaticDetectionUserEditable() {
if (system::HasSystemTimezonePolicy())
return false;
if (IsSystemTimezoneAutomaticDetectionManaged()) {
return GetSystemTimezoneAutomaticDetectionPolicyValue() ==
enterprise_management::SystemTimezoneProto::USERS_DECIDE;
}
return true;
}
} // namespace
DateTimeHandler::DateTimeHandler() : scoped_observer_(this) {}
DateTimeHandler::~DateTimeHandler() = default;
DateTimeHandler* DateTimeHandler::Create(
content::WebUIDataSource* html_source) {
// Set the initial time zone to show.
html_source->AddString("timeZoneName", system::GetCurrentTimezoneName());
html_source->AddString(
"timeZoneID",
system::TimezoneSettings::GetInstance()->GetCurrentTimezoneID());
html_source->AddBoolean(
"timeActionsProtectedForChild",
base::FeatureList::IsEnabled(features::kParentAccessCodeForTimeChange));
return new DateTimeHandler;
}
void DateTimeHandler::RegisterMessages() {
web_ui()->RegisterMessageCallback(
"dateTimePageReady",
base::BindRepeating(&DateTimeHandler::HandleDateTimePageReady,
base::Unretained(this)));
web_ui()->RegisterMessageCallback(
"getTimeZones", base::BindRepeating(&DateTimeHandler::HandleGetTimeZones,
base::Unretained(this)));
web_ui()->RegisterMessageCallback(
"showSetDateTimeUI",
base::BindRepeating(&DateTimeHandler::HandleShowSetDateTimeUI,
base::Unretained(this)));
web_ui()->RegisterMessageCallback(
"handleShowParentAccessForTimeZone",
base::BindRepeating(&DateTimeHandler::HandleShowParentAccessForTimeZone,
base::Unretained(this)));
}
void DateTimeHandler::OnJavascriptAllowed() {
SystemClockClient* system_clock_client = SystemClockClient::Get();
scoped_observer_.Add(system_clock_client);
SystemClockCanSetTimeChanged(system_clock_client->CanSetTime());
// The system time zone policy disables auto-detection entirely. (However,
// the time zone policy does not override the user's time zone itself.)
system_timezone_policy_subscription_ =
CrosSettings::Get()->AddSettingsObserver(
kSystemTimezonePolicy,
base::Bind(&DateTimeHandler::NotifyTimezoneAutomaticDetectionPolicy,
weak_ptr_factory_.GetWeakPtr()));
// The auto-detection policy can force auto-detection on or off.
local_state_pref_change_registrar_.Init(g_browser_process->local_state());
local_state_pref_change_registrar_.Add(
prefs::kSystemTimezoneAutomaticDetectionPolicy,
base::Bind(&DateTimeHandler::NotifyTimezoneAutomaticDetectionPolicy,
base::Unretained(this)));
}
void DateTimeHandler::OnJavascriptDisallowed() {
scoped_observer_.RemoveAll();
system_timezone_policy_subscription_.reset();
local_state_pref_change_registrar_.RemoveAll();
}
void DateTimeHandler::HandleDateTimePageReady(const base::ListValue* args) {
AllowJavascript();
// Send the time zone automatic detection policy in case it changed after the
// handler was created.
NotifyTimezoneAutomaticDetectionPolicy();
}
void DateTimeHandler::HandleGetTimeZones(const base::ListValue* args) {
AllowJavascript();
CHECK_EQ(1U, args->GetSize());
const base::Value* callback_id;
CHECK(args->Get(0, &callback_id));
ResolveJavascriptCallback(*callback_id, *system::GetTimezoneList().release());
}
void DateTimeHandler::HandleShowSetDateTimeUI(const base::ListValue* args) {
// Make sure the clock status hasn't changed since the button was clicked.
if (!SystemClockClient::Get()->CanSetTime())
return;
SetTimeDialog::ShowDialog(
web_ui()->GetWebContents()->GetTopLevelNativeWindow());
}
void DateTimeHandler::HandleShowParentAccessForTimeZone(
const base::ListValue* args) {
DCHECK(user_manager::UserManager::Get()->GetActiveUser()->IsChild());
if (!parent_access::ParentAccessService::IsApprovalRequired(
parent_access::ParentAccessService::SupervisedAction::
kUpdateTimezone)) {
OnParentAccessValidation(true);
return;
}
ash::LoginScreen::Get()->ShowParentAccessWidget(
user_manager::UserManager::Get()->GetActiveUser()->GetAccountId(),
base::BindRepeating(&DateTimeHandler::OnParentAccessValidation,
weak_ptr_factory_.GetWeakPtr()),
ash::ParentAccessRequestReason::kChangeTimezone, false /* extra_dimmer */,
base::Time());
}
void DateTimeHandler::OnParentAccessValidation(bool success) {
if (success)
FireWebUIListener("access-code-validation-complete");
}
void DateTimeHandler::NotifyTimezoneAutomaticDetectionPolicy() {
bool managed = !IsTimezoneAutomaticDetectionUserEditable();
bool force_enabled = managed &&
g_browser_process->platform_part()
->GetTimezoneResolverManager()
->ShouldApplyResolvedTimezone();
FireWebUIListener("time-zone-auto-detect-policy", base::Value(managed),
base::Value(force_enabled));
}
void DateTimeHandler::SystemClockCanSetTimeChanged(bool can_set_time) {
FireWebUIListener("can-set-date-time-changed", base::Value(can_set_time));
}
} // namespace settings
} // namespace chromeos
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