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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROMECAST_NET_TIME_SYNC_TRACKER_H_
#define CHROMECAST_NET_TIME_SYNC_TRACKER_H_
#include "base/observer_list.h"
#include "base/observer_list_types.h"
namespace chromecast {
// Tracks whether or not time has synced on the device.
//
// In cases where general network connectivity does not include whether or not
// time has synced, this class provides that information.
class TimeSyncTracker {
public:
class Observer : public base::CheckedObserver {
public:
virtual void OnTimeSynced() = 0;
protected:
Observer() {}
~Observer() override = default;
};
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
// Informs the tracker that the network is connected.
virtual void OnNetworkConnected() = 0;
// Returns if the time has been synced.
virtual bool IsTimeSynced() const = 0;
protected:
TimeSyncTracker();
virtual ~TimeSyncTracker();
// Notifies observer that time has been synced.
void Notify();
private:
base::ObserverList<Observer> observer_list_;
};
} // namespace chromecast
#endif // CHROMECAST_NET_TIME_SYNC_TRACKER_H_