1// Copyright 2014 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#ifndef COMPONENTS_SYNC_DRIVER_DEVICE_INFO_TRACKER_H_
6#define COMPONENTS_SYNC_DRIVER_DEVICE_INFO_TRACKER_H_
7
8#include "base/memory/scoped_ptr.h"
9#include "base/memory/scoped_vector.h"
10#include "components/sync_driver/device_info.h"
11
12namespace sync_driver {
13
14// Interface for tracking synced DeviceInfo.
15class DeviceInfoTracker {
16 public:
17  virtual ~DeviceInfoTracker() {}
18
19  // Observer class for listening to device info changes.
20  class Observer {
21   public:
22    virtual void OnDeviceInfoChange() = 0;
23  };
24
25  // Gets DeviceInfo the synced device with specified client ID.
26  // Returns an empty scoped_ptr if device with the given |client_id| hasn't
27  // been synced.
28  virtual scoped_ptr<DeviceInfo> GetDeviceInfo(
29      const std::string& client_id) const = 0;
30  // Gets DeviceInfo for all synced devices (including the local one).
31  virtual ScopedVector<DeviceInfo> GetAllDeviceInfo() const = 0;
32  // Registers an observer to be called on syncing any updated DeviceInfo.
33  virtual void AddObserver(Observer* observer) = 0;
34  // Unregisters an observer.
35  virtual void RemoveObserver(Observer* observer) = 0;
36};
37
38}  // namespace sync_driver
39
40#endif  // COMPONENTS_SYNC_DRIVER_DEVICE_INFO_TRACKER_H_
41