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// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chromeos/ash/components/dbus/system_clock/system_clock_sync_observation.h"
#include "base/functional/bind.h"
#include "base/memory/ptr_util.h"
#include "base/time/time.h"
#include "chromeos/ash/components/dbus/system_clock/system_clock_client.h"
namespace ash {
// static
std::unique_ptr<SystemClockSyncObservation>
SystemClockSyncObservation::WaitForSystemClockSync(
SystemClockClient* system_clock_client,
base::TimeDelta timeout,
SystemClockSyncCallback callback) {
return base::WrapUnique(new SystemClockSyncObservation(
system_clock_client, timeout, std::move(callback)));
}
SystemClockSyncObservation::SystemClockSyncObservation(
SystemClockClient* system_clock_client,
base::TimeDelta timeout,
SystemClockSyncCallback callback)
: system_clock_client_(system_clock_client) {
callback_ = std::move(callback);
timeout_timer_.Start(FROM_HERE, timeout,
base::BindOnce(&SystemClockSyncObservation::OnTimeout,
weak_ptr_factory_.GetWeakPtr()));
system_clock_client_observation_.Observe(SystemClockClient::Get());
system_clock_client_->WaitForServiceToBeAvailable(
base::BindOnce(&SystemClockSyncObservation::OnSystemClockServiceAvailable,
weak_ptr_factory_.GetWeakPtr()));
}
SystemClockSyncObservation::~SystemClockSyncObservation() = default;
// Called when the system clock service is available, or when it is known that
// the system clock service is not available.
void SystemClockSyncObservation::OnSystemClockServiceAvailable(
bool service_is_available) {
if (!service_is_available) {
RunCallbackWithResult(false);
return;
}
system_clock_client_->GetLastSyncInfo(
base::BindOnce(&SystemClockSyncObservation::OnLastSyncInfo,
weak_ptr_factory_.GetWeakPtr()));
}
// Called on initial fetch of the system clock sync state, and when the system
// clock sync state has changed.
void SystemClockSyncObservation::OnLastSyncInfo(bool network_synchronized) {
if (on_last_sync_info_for_testing_)
std::move(on_last_sync_info_for_testing_).Run();
if (!network_synchronized) {
// Don't notify the callback, wait for (another) SystemClockUpdated()
// notification.
return;
}
RunCallbackWithResult(true);
}
// Called when the time out has been reached.
void SystemClockSyncObservation::OnTimeout() {
RunCallbackWithResult(false);
}
void SystemClockSyncObservation::RunCallbackWithResult(bool result) {
if (callback_.is_null())
return;
timeout_timer_.Stop();
weak_ptr_factory_.InvalidateWeakPtrs();
std::move(callback_).Run(result);
}
// SystemClockClient::Observer:
void SystemClockSyncObservation::SystemClockUpdated() {
system_clock_client_->GetLastSyncInfo(
base::BindOnce(&SystemClockSyncObservation::OnLastSyncInfo,
weak_ptr_factory_.GetWeakPtr()));
}
} // namespace ash
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