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// Copyright 2015 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.
#ifndef COMPONENTS_PROXIMITY_AUTH_PROXIMITY_MONITOR_H
#define COMPONENTS_PROXIMITY_AUTH_PROXIMITY_MONITOR_H
#include "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:
enum class Strategy { NONE, CHECK_RSSI, CHECK_TRANSMIT_POWER };
virtual ~ProximityMonitor() {}
// 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 the strategy used to determine whether the remote device is in
// proximity.
virtual Strategy GetStrategy() const = 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;
// Returns |true| iff the remote device is close enough to the local device,
// according to its RSSI measurement.
virtual bool IsInRssiRange() 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;
// Adds an observer.
virtual void AddObserver(ProximityMonitorObserver* observer) = 0;
// Removes an observer.
virtual void RemoveObserver(ProximityMonitorObserver* observer) = 0;
};
} // namespace proximity_auth
#endif // COMPONENTS_PROXIMITY_AUTH_PROXIMITY_MONITOR_H
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