src/chrome/browser/sync/glue/synced_device_tracker.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 #include "chrome/browser/sync/glue/synced_device_tracker.h"
   6
   7 #include "base/strings/stringprintf.h"
   8 #include "base/strings/utf_string_conversions.h"
   9 #include "chrome/browser/sync/glue/device_info.h"
  10 #include "sync/internal_api/public/base/model_type.h"
  11 #include "sync/internal_api/public/read_node.h"
  12 #include "sync/internal_api/public/read_transaction.h"
  13 #include "sync/internal_api/public/user_share.h"
  14 #include "sync/internal_api/public/write_node.h"
  15 #include "sync/internal_api/public/write_transaction.h"
  16
  17 namespace browser_sync {
  18
  19 namespace {
  20
  21 // Return the DeviceInfo UNIQUE_CLIENT_TAG value for the given sync cache_guid.
  22 std::string DeviceInfoLookupString(const std::string& cache_guid) {
  23   return base::StringPrintf("DeviceInfo_%s", cache_guid.c_str());
  24 }
  25
  26 }  // namespace
  27
  28 SyncedDeviceTracker::SyncedDeviceTracker(syncer::UserShare* user_share,
  29                                          const std::string& cache_guid)
  30   : ChangeProcessor(NULL),
  31     user_share_(user_share),
  32     cache_guid_(cache_guid),
  33     local_device_info_tag_(DeviceInfoLookupString(cache_guid)),
  34     weak_factory_(this) {
  35   observers_ = new ObserverListThreadSafe<Observer>;
  36 }
  37
  38 SyncedDeviceTracker::~SyncedDeviceTracker() {
  39 }
  40
  41 void SyncedDeviceTracker::StartImpl() { }
  42
  43 void SyncedDeviceTracker::ApplyChangesFromSyncModel(
  44       const syncer::BaseTransaction* trans,
  45       int64 model_version,
  46       const syncer::ImmutableChangeRecordList& changes) {
  47   // If desired, we could maintain a cache of device info.  This method will be
  48   // called with a transaction every time the device info is modified, so this
  49   // would be the right place to update the cache.
  50 }
  51
  52 void SyncedDeviceTracker::CommitChangesFromSyncModel() {
  53   observers_->Notify(&Observer::OnDeviceInfoChange);
  54 }
  55
  56 scoped_ptr<DeviceInfo> SyncedDeviceTracker::ReadLocalDeviceInfo() const {
  57   syncer::ReadTransaction trans(FROM_HERE, user_share_);
  58   return ReadLocalDeviceInfo(trans);
  59 }
  60
  61 scoped_ptr<DeviceInfo> SyncedDeviceTracker::ReadLocalDeviceInfo(
  62     const syncer::BaseTransaction& trans) const {
  63   syncer::ReadNode node(&trans);
  64   if (node.InitByClientTagLookup(syncer::DEVICE_INFO, local_device_info_tag_) !=
  65       syncer::BaseNode::INIT_OK) {
  66     return scoped_ptr<DeviceInfo>();
  67   }
  68
  69   const sync_pb::DeviceInfoSpecifics& specifics = node.GetDeviceInfoSpecifics();
  70   return scoped_ptr<DeviceInfo> (
  71       new DeviceInfo(specifics.cache_guid(),
  72                      specifics.client_name(),
  73                      specifics.chrome_version(),
  74                      specifics.sync_user_agent(),
  75                      specifics.device_type()));
  76 }
  77
  78 scoped_ptr<DeviceInfo> SyncedDeviceTracker::ReadDeviceInfo(
  79     const std::string& client_id) const {
  80   syncer::ReadTransaction trans(FROM_HERE, user_share_);
  81   syncer::ReadNode node(&trans);
  82   std::string lookup_string = DeviceInfoLookupString(client_id);
  83   if (node.InitByClientTagLookup(syncer::DEVICE_INFO, lookup_string) !=
  84       syncer::BaseNode::INIT_OK) {
  85     return scoped_ptr<DeviceInfo>();
  86   }
  87
  88   const sync_pb::DeviceInfoSpecifics& specifics = node.GetDeviceInfoSpecifics();
  89   return scoped_ptr<DeviceInfo> (
  90       new DeviceInfo(specifics.cache_guid(),
  91                      specifics.client_name(),
  92                      specifics.chrome_version(),
  93                      specifics.sync_user_agent(),
  94                      specifics.device_type()));
  95 }
  96
  97 void SyncedDeviceTracker::GetAllSyncedDeviceInfo(
  98     ScopedVector<DeviceInfo>* device_info) const {
  99   if (device_info == NULL)
 100     return;
 101
 102   device_info->clear();
 103
 104   syncer::ReadTransaction trans(FROM_HERE, user_share_);
 105   syncer::ReadNode root_node(&trans);
 106
 107   if (root_node.InitTypeRoot(syncer::DEVICE_INFO) !=
 108       syncer::BaseNode::INIT_OK) {
 109     return;
 110   }
 111
 112   // Get all the children of the root node and use the child id to read
 113   // device info for devices.
 114   std::vector<int64> children;
 115   root_node.GetChildIds(&children);
 116
 117   for (std::vector<int64>::const_iterator it = children.begin();
 118        it != children.end(); ++it) {
 119     syncer::ReadNode node(&trans);
 120     if (node.InitByIdLookup(*it) != syncer::BaseNode::INIT_OK)
 121       return;
 122
 123     const sync_pb::DeviceInfoSpecifics& specifics =
 124         node.GetDeviceInfoSpecifics();
 125     device_info->push_back(
 126         new DeviceInfo(specifics.cache_guid(),
 127                        specifics.client_name(),
 128                        specifics.chrome_version(),
 129                        specifics.sync_user_agent(),
 130                        specifics.device_type()));
 131   }
 132 }
 133
 134 std::string SyncedDeviceTracker::cache_guid() const {
 135   return cache_guid_;
 136 }
 137
 138 void SyncedDeviceTracker::AddObserver(Observer* observer) {
 139   observers_->AddObserver(observer);
 140 }
 141
 142 void SyncedDeviceTracker::RemoveObserver(Observer* observer) {
 143   observers_->RemoveObserver(observer);
 144 }
 145
 146 void SyncedDeviceTracker::InitLocalDeviceInfo(const base::Closure& callback) {
 147   DeviceInfo::CreateLocalDeviceInfo(
 148       cache_guid_,
 149       base::Bind(&SyncedDeviceTracker::InitLocalDeviceInfoContinuation,
 150                  weak_factory_.GetWeakPtr(), callback));
 151 }
 152
 153 void SyncedDeviceTracker::InitLocalDeviceInfoContinuation(
 154     const base::Closure& callback, const DeviceInfo& local_info) {
 155   WriteLocalDeviceInfo(local_info);
 156   callback.Run();
 157 }
 158
 159 void SyncedDeviceTracker::WriteLocalDeviceInfo(const DeviceInfo& info) {
 160   sync_pb::DeviceInfoSpecifics specifics;
 161   DCHECK_EQ(cache_guid_, info.guid());
 162   specifics.set_cache_guid(cache_guid_);
 163   specifics.set_client_name(info.client_name());
 164   specifics.set_chrome_version(info.chrome_version());
 165   specifics.set_sync_user_agent(info.sync_user_agent());
 166   specifics.set_device_type(info.device_type());
 167
 168   WriteDeviceInfo(specifics, local_device_info_tag_);
 169 }
 170
 171 void SyncedDeviceTracker::WriteDeviceInfo(
 172     const sync_pb::DeviceInfoSpecifics& specifics,
 173     const std::string& tag) {
 174   syncer::WriteTransaction trans(FROM_HERE, user_share_);
 175   syncer::WriteNode node(&trans);
 176
 177   if (node.InitByClientTagLookup(syncer::DEVICE_INFO, tag) ==
 178       syncer::BaseNode::INIT_OK) {
 179     node.SetDeviceInfoSpecifics(specifics);
 180     node.SetTitle(specifics.client_name());
 181   } else {
 182     syncer::ReadNode type_root(&trans);
 183     syncer::BaseNode::InitByLookupResult type_root_lookup_result =
 184         type_root.InitTypeRoot(syncer::DEVICE_INFO);
 185     DCHECK_EQ(syncer::BaseNode::INIT_OK, type_root_lookup_result);
 186
 187     syncer::WriteNode new_node(&trans);
 188     syncer::WriteNode::InitUniqueByCreationResult create_result =
 189         new_node.InitUniqueByCreation(syncer::DEVICE_INFO,
 190                                       type_root,
 191                                       tag);
 192     DCHECK_EQ(syncer::WriteNode::INIT_SUCCESS, create_result);
 193     new_node.SetDeviceInfoSpecifics(specifics);
 194     new_node.SetTitle(specifics.client_name());
 195   }
 196 }
 197
 198 }  // namespace browser_sync