chrome/browser/storage_monitor/transient_device_ids.cc

   1 // Copyright (c) 2012 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 "chrome/browser/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 "chrome/browser/storage_monitor/storage_info.h"
  13
  14 TransientDeviceIds::TransientDeviceIds() {}
  15
  16 TransientDeviceIds::~TransientDeviceIds() {}
  17
  18 std::string TransientDeviceIds::GetTransientIdForDeviceId(
  19     const std::string& device_id) {
  20   DCHECK(thread_checker_.CalledOnValidThread());
  21
  22   if (!ContainsKey(device_id_map_, device_id)) {
  23     std::string transient_id;
  24     do {
  25       transient_id = base::GenerateGUID();
  26     } while (ContainsKey(transient_id_map_, transient_id));
  27
  28     device_id_map_[device_id] = transient_id;
  29     transient_id_map_[transient_id] = device_id;
  30   }
  31
  32   return device_id_map_[device_id];
  33 }
  34
  35 std::string TransientDeviceIds::DeviceIdFromTransientId(
  36     const std::string& transient_id) const {
  37   IdMap::const_iterator it = transient_id_map_.find(transient_id);
  38   if (it == transient_id_map_.end())
  39     return std::string();
  40   return it->second;
  41 }