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// TransientDeviceIds implementation.
6
7#include "components/storage_monitor/transient_device_ids.h"
8
9#include "base/guid.h"
10#include "base/logging.h"
11#include "base/stl_util.h"
12#include "components/storage_monitor/storage_info.h"
13
14namespace storage_monitor {
15
16TransientDeviceIds::TransientDeviceIds() {}
17
18TransientDeviceIds::~TransientDeviceIds() {}
19
20std::string TransientDeviceIds::GetTransientIdForDeviceId(
21    const std::string& device_id) {
22  DCHECK(thread_checker_.CalledOnValidThread());
23
24  if (!ContainsKey(device_id_map_, device_id)) {
25    std::string transient_id;
26    do {
27      transient_id = base::GenerateGUID();
28    } while (ContainsKey(transient_id_map_, transient_id));
29
30    device_id_map_[device_id] = transient_id;
31    transient_id_map_[transient_id] = device_id;
32  }
33
34  return device_id_map_[device_id];
35}
36
37std::string TransientDeviceIds::DeviceIdFromTransientId(
38    const std::string& transient_id) const {
39  IdMap::const_iterator it = transient_id_map_.find(transient_id);
40  if (it == transient_id_map_.end())
41    return std::string();
42  return it->second;
43}
44
45}  // namespace storage_monitor
46