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 DEVICE_HID_HID_SERVICE_H_
6#define DEVICE_HID_HID_SERVICE_H_
7
8#include <map>
9#include <string>
10#include <vector>
11
12#include "base/memory/ref_counted.h"
13#include "base/single_thread_task_runner.h"
14#include "base/threading/thread_checker.h"
15#include "device/hid/hid_device_info.h"
16
17namespace device {
18
19class HidConnection;
20
21class HidService {
22 public:
23  static HidService* GetInstance(
24      scoped_refptr<base::SingleThreadTaskRunner> file_task_runner,
25      scoped_refptr<base::SingleThreadTaskRunner> ui_task_runner);
26
27  // Enumerates and returns a list of device identifiers.
28  virtual void GetDevices(std::vector<HidDeviceInfo>* devices);
29
30  // Fills in a DeviceInfo struct with info for the given device_id.
31  // Returns |true| if successful or |false| if |device_id| is invalid.
32  bool GetDeviceInfo(const HidDeviceId& device_id, HidDeviceInfo* info) const;
33
34  virtual scoped_refptr<HidConnection> Connect(
35      const HidDeviceId& device_id) = 0;
36
37 protected:
38  friend class HidConnectionTest;
39
40  typedef std::map<HidDeviceId, HidDeviceInfo> DeviceMap;
41
42  HidService();
43  virtual ~HidService();
44
45  void AddDevice(const HidDeviceInfo& info);
46  void RemoveDevice(const HidDeviceId& device_id);
47
48  const DeviceMap& devices() const { return devices_; }
49
50  base::ThreadChecker thread_checker_;
51
52 private:
53  class Destroyer;
54
55  DeviceMap devices_;
56
57  DISALLOW_COPY_AND_ASSIGN(HidService);
58};
59
60}  // namespace device
61
62#endif  // DEVICE_HID_HID_SERVICE_H_
63