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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.
#ifndef CHROMEOS_ASH_COMPONENTS_PROXIMITY_AUTH_PROXIMITY_MONITOR_H_
#define CHROMEOS_ASH_COMPONENTS_PROXIMITY_AUTH_PROXIMITY_MONITOR_H_
#include "base/observer_list.h"
#include "chromeos/ash/components/proximity_auth/proximity_monitor_observer.h"
namespace proximity_auth {
// An interface that is responsible for tracking whether the remote device is
// sufficiently close to the local device to permit unlocking.
class ProximityMonitor {
public:
ProximityMonitor();
virtual ~ProximityMonitor();
void AddObserver(ProximityMonitorObserver* observer);
void RemoveObserver(ProximityMonitorObserver* observer);
// Activates the proximity monitor. No-op if the proximity monitor is already
// active.
virtual void Start() = 0;
// Deactivates the proximity monitor. No-op if the proximity monitor is
// already inactive.
virtual void Stop() = 0;
// Returns |true| iff the remote device is close enough to the local device,
// given the user's current settings.
virtual bool IsUnlockAllowed() const = 0;
// Records the current proximity measurements to UMA. This should be called
// when the user successfully authenticates using proximity auth.
virtual void RecordProximityMetricsOnAuthSuccess() = 0;
protected:
void NotifyProximityStateChanged();
private:
// The observers attached to the ProximityMonitor.
base::ObserverList<ProximityMonitorObserver>::Unchecked observers_;
};
} // namespace proximity_auth
#endif // CHROMEOS_ASH_COMPONENTS_PROXIMITY_AUTH_PROXIMITY_MONITOR_H_
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