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// Copyright 2016 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_TETHER_HOST_SCANNER_H_
#define CHROMEOS_ASH_COMPONENTS_TETHER_HOST_SCANNER_H_
#include "base/observer_list.h"
namespace ash {
namespace tether {
// Scans for nearby tether hosts.
class HostScanner {
public:
class Observer {
public:
virtual void ScanFinished() = 0;
protected:
virtual ~Observer() = default;
};
HostScanner();
HostScanner(const HostScanner&) = delete;
HostScanner& operator=(const HostScanner&) = delete;
virtual ~HostScanner();
// Returns true if a scan is currently in progress.
virtual bool IsScanActive() = 0;
// Starts a host scan if there is no current scan. If a scan is active, this
// function is a no-op.
virtual void StartScan() = 0;
// Stops a host scan if there is a current scan. If no scan is active, this
// function is a no-op.
virtual void StopScan() = 0;
void AddObserver(Observer* observer);
void RemoveObserver(Observer* observer);
protected:
void NotifyScanFinished();
private:
base::ObserverList<Observer>::Unchecked observer_list_;
};
} // namespace tether
} // namespace ash
#endif // CHROMEOS_ASH_COMPONENTS_TETHER_HOST_SCANNER_H_
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