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| 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/extensions/api/storage/syncable_settings_storage.h" | |
| 6 | |
| 7 #include "chrome/browser/extensions/api/storage/settings_namespace.h" | |
| 8 #include "chrome/browser/extensions/api/storage/settings_sync_processor.h" | |
| 9 #include "chrome/browser/extensions/api/storage/settings_sync_util.h" | |
| 10 #include "content/public/browser/browser_thread.h" | |
| 11 #include "sync/api/sync_data.h" | |
| 12 #include "sync/protocol/extension_setting_specifics.pb.h" | |
| 13 | |
| 14 namespace extensions { | |
| 15 | |
| 16 using content::BrowserThread; | |
| 17 | |
| 18 SyncableSettingsStorage::SyncableSettingsStorage( | |
| 19 const scoped_refptr<ObserverListThreadSafe<SettingsObserver> >& | |
| 20 observers, | |
| 21 const std::string& extension_id, | |
| 22 ValueStore* delegate) | |
| 23 : observers_(observers), | |
| 24 extension_id_(extension_id), | |
| 25 delegate_(delegate) { | |
| 26 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 27 } | |
| 28 | |
| 29 SyncableSettingsStorage::~SyncableSettingsStorage() { | |
| 30 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 31 } | |
| 32 | |
| 33 size_t SyncableSettingsStorage::GetBytesInUse(const std::string& key) { | |
| 34 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 35 return delegate_->GetBytesInUse(key); | |
| 36 } | |
| 37 | |
| 38 size_t SyncableSettingsStorage::GetBytesInUse( | |
| 39 const std::vector<std::string>& keys) { | |
| 40 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 41 return delegate_->GetBytesInUse(keys); | |
| 42 } | |
| 43 | |
| 44 size_t SyncableSettingsStorage::GetBytesInUse() { | |
| 45 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 46 return delegate_->GetBytesInUse(); | |
| 47 } | |
| 48 | |
| 49 ValueStore::ReadResult SyncableSettingsStorage::Get( | |
| 50 const std::string& key) { | |
| 51 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 52 return delegate_->Get(key); | |
| 53 } | |
| 54 | |
| 55 ValueStore::ReadResult SyncableSettingsStorage::Get( | |
| 56 const std::vector<std::string>& keys) { | |
| 57 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 58 return delegate_->Get(keys); | |
| 59 } | |
| 60 | |
| 61 ValueStore::ReadResult SyncableSettingsStorage::Get() { | |
| 62 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 63 return delegate_->Get(); | |
| 64 } | |
| 65 | |
| 66 ValueStore::WriteResult SyncableSettingsStorage::Set( | |
| 67 WriteOptions options, const std::string& key, const Value& value) { | |
| 68 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 69 WriteResult result = delegate_->Set(options, key, value); | |
| 70 if (result->HasError()) { | |
| 71 return result.Pass(); | |
| 72 } | |
| 73 SyncResultIfEnabled(result); | |
| 74 return result.Pass(); | |
| 75 } | |
| 76 | |
| 77 ValueStore::WriteResult SyncableSettingsStorage::Set( | |
| 78 WriteOptions options, const DictionaryValue& values) { | |
| 79 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 80 WriteResult result = delegate_->Set(options, values); | |
| 81 if (result->HasError()) { | |
| 82 return result.Pass(); | |
| 83 } | |
| 84 SyncResultIfEnabled(result); | |
| 85 return result.Pass(); | |
| 86 } | |
| 87 | |
| 88 ValueStore::WriteResult SyncableSettingsStorage::Remove( | |
| 89 const std::string& key) { | |
| 90 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 91 WriteResult result = delegate_->Remove(key); | |
| 92 if (result->HasError()) { | |
| 93 return result.Pass(); | |
| 94 } | |
| 95 SyncResultIfEnabled(result); | |
| 96 return result.Pass(); | |
| 97 } | |
| 98 | |
| 99 ValueStore::WriteResult SyncableSettingsStorage::Remove( | |
| 100 const std::vector<std::string>& keys) { | |
| 101 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 102 WriteResult result = delegate_->Remove(keys); | |
| 103 if (result->HasError()) { | |
| 104 return result.Pass(); | |
| 105 } | |
| 106 SyncResultIfEnabled(result); | |
| 107 return result.Pass(); | |
| 108 } | |
| 109 | |
| 110 ValueStore::WriteResult SyncableSettingsStorage::Clear() { | |
| 111 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 112 WriteResult result = delegate_->Clear(); | |
| 113 if (result->HasError()) { | |
| 114 return result.Pass(); | |
| 115 } | |
| 116 SyncResultIfEnabled(result); | |
| 117 return result.Pass(); | |
| 118 } | |
| 119 | |
| 120 void SyncableSettingsStorage::SyncResultIfEnabled( | |
| 121 const ValueStore::WriteResult& result) { | |
| 122 if (sync_processor_.get() && !result->changes().empty()) { | |
| 123 syncer::SyncError error = sync_processor_->SendChanges(result->changes()); | |
| 124 if (error.IsSet()) | |
| 125 StopSyncing(); | |
| 126 } | |
| 127 } | |
| 128 | |
| 129 // Sync-related methods. | |
| 130 | |
| 131 syncer::SyncError SyncableSettingsStorage::StartSyncing( | |
| 132 const DictionaryValue& sync_state, | |
| 133 scoped_ptr<SettingsSyncProcessor> sync_processor) { | |
| 134 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 135 DCHECK(!sync_processor_.get()); | |
| 136 | |
| 137 sync_processor_ = sync_processor.Pass(); | |
| 138 sync_processor_->Init(sync_state); | |
| 139 | |
| 140 ReadResult maybe_settings = delegate_->Get(); | |
| 141 if (maybe_settings->HasError()) { | |
| 142 return syncer::SyncError( | |
| 143 FROM_HERE, | |
| 144 std::string("Failed to get settings: ") + maybe_settings->error(), | |
| 145 sync_processor_->type()); | |
| 146 } | |
| 147 | |
| 148 const DictionaryValue& settings = *maybe_settings->settings().get(); | |
| 149 if (sync_state.empty()) | |
| 150 return SendLocalSettingsToSync(settings); | |
| 151 else | |
| 152 return OverwriteLocalSettingsWithSync(sync_state, settings); | |
| 153 } | |
| 154 | |
| 155 syncer::SyncError SyncableSettingsStorage::SendLocalSettingsToSync( | |
| 156 const DictionaryValue& settings) { | |
| 157 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 158 | |
| 159 ValueStoreChangeList changes; | |
| 160 for (DictionaryValue::Iterator i(settings); i.HasNext(); i.Advance()) { | |
| 161 changes.push_back(ValueStoreChange(i.key(), NULL, i.value().DeepCopy())); | |
| 162 } | |
| 163 | |
| 164 if (changes.empty()) | |
| 165 return syncer::SyncError(); | |
| 166 | |
| 167 syncer::SyncError error = sync_processor_->SendChanges(changes); | |
| 168 if (error.IsSet()) | |
| 169 StopSyncing(); | |
| 170 | |
| 171 return error; | |
| 172 } | |
| 173 | |
| 174 syncer::SyncError SyncableSettingsStorage::OverwriteLocalSettingsWithSync( | |
| 175 const DictionaryValue& sync_state, const DictionaryValue& settings) { | |
| 176 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 177 // Treat this as a list of changes to sync and use ProcessSyncChanges. | |
| 178 // This gives notifications etc for free. | |
| 179 scoped_ptr<DictionaryValue> new_sync_state(sync_state.DeepCopy()); | |
| 180 | |
| 181 SettingSyncDataList changes; | |
| 182 for (DictionaryValue::Iterator it(settings); it.HasNext(); it.Advance()) { | |
| 183 Value* orphaned_sync_value = NULL; | |
| 184 if (new_sync_state->RemoveWithoutPathExpansion( | |
| 185 it.key(), &orphaned_sync_value)) { | |
| 186 scoped_ptr<Value> sync_value(orphaned_sync_value); | |
| 187 if (sync_value->Equals(&it.value())) { | |
| 188 // Sync and local values are the same, no changes to send. | |
| 189 } else { | |
| 190 // Sync value is different, update local setting with new value. | |
| 191 changes.push_back( | |
| 192 SettingSyncData( | |
| 193 syncer::SyncChange::ACTION_UPDATE, | |
| 194 extension_id_, | |
| 195 it.key(), | |
| 196 sync_value.Pass())); | |
| 197 } | |
| 198 } else { | |
| 199 // Not synced, delete local setting. | |
| 200 changes.push_back( | |
| 201 SettingSyncData( | |
| 202 syncer::SyncChange::ACTION_DELETE, | |
| 203 extension_id_, | |
| 204 it.key(), | |
| 205 scoped_ptr<Value>(new DictionaryValue()))); | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 // Add all new settings to local settings. | |
| 210 while (!new_sync_state->empty()) { | |
| 211 std::string key = *new_sync_state->begin_keys(); | |
| 212 Value* value = NULL; | |
| 213 CHECK(new_sync_state->RemoveWithoutPathExpansion(key, &value)); | |
| 214 changes.push_back( | |
| 215 SettingSyncData( | |
| 216 syncer::SyncChange::ACTION_ADD, | |
| 217 extension_id_, | |
| 218 key, | |
| 219 scoped_ptr<Value>(value))); | |
| 220 } | |
| 221 | |
| 222 if (changes.empty()) | |
| 223 return syncer::SyncError(); | |
| 224 | |
| 225 return ProcessSyncChanges(changes); | |
| 226 } | |
| 227 | |
| 228 void SyncableSettingsStorage::StopSyncing() { | |
| 229 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 230 sync_processor_.reset(); | |
| 231 } | |
| 232 | |
| 233 syncer::SyncError SyncableSettingsStorage::ProcessSyncChanges( | |
| 234 const SettingSyncDataList& sync_changes) { | |
| 235 DCHECK(BrowserThread::CurrentlyOn(BrowserThread::FILE)); | |
| 236 DCHECK(!sync_changes.empty()) << "No sync changes for " << extension_id_; | |
| 237 | |
| 238 if (!sync_processor_.get()) { | |
| 239 return syncer::SyncError( | |
| 240 FROM_HERE, | |
| 241 std::string("Sync is inactive for ") + extension_id_, | |
| 242 syncer::UNSPECIFIED); | |
| 243 } | |
| 244 | |
| 245 std::vector<syncer::SyncError> errors; | |
| 246 ValueStoreChangeList changes; | |
| 247 | |
| 248 for (SettingSyncDataList::const_iterator it = sync_changes.begin(); | |
| 249 it != sync_changes.end(); ++it) { | |
| 250 DCHECK_EQ(extension_id_, it->extension_id()); | |
| 251 | |
| 252 const std::string& key = it->key(); | |
| 253 const Value& value = it->value(); | |
| 254 | |
| 255 scoped_ptr<Value> current_value; | |
| 256 { | |
| 257 ReadResult maybe_settings = Get(it->key()); | |
| 258 if (maybe_settings->HasError()) { | |
| 259 errors.push_back(syncer::SyncError( | |
| 260 FROM_HERE, | |
| 261 std::string("Error getting current sync state for ") + | |
| 262 extension_id_ + "/" + key + ": " + maybe_settings->error(), | |
| 263 sync_processor_->type())); | |
| 264 continue; | |
| 265 } | |
| 266 Value* value = NULL; | |
| 267 if (maybe_settings->settings()->GetWithoutPathExpansion(key, &value)) { | |
| 268 current_value.reset(value->DeepCopy()); | |
| 269 } | |
| 270 } | |
| 271 | |
| 272 syncer::SyncError error; | |
| 273 | |
| 274 switch (it->change_type()) { | |
| 275 case syncer::SyncChange::ACTION_ADD: | |
| 276 if (!current_value.get()) { | |
| 277 error = OnSyncAdd(key, value.DeepCopy(), &changes); | |
| 278 } else { | |
| 279 // Already a value; hopefully a local change has beaten sync in a | |
| 280 // race and it's not a bug, so pretend it's an update. | |
| 281 LOG(WARNING) << "Got add from sync for existing setting " << | |
| 282 extension_id_ << "/" << key; | |
| 283 error = OnSyncUpdate( | |
| 284 key, current_value.release(), value.DeepCopy(), &changes); | |
| 285 } | |
| 286 break; | |
| 287 | |
| 288 case syncer::SyncChange::ACTION_UPDATE: | |
| 289 if (current_value.get()) { | |
| 290 error = OnSyncUpdate( | |
| 291 key, current_value.release(), value.DeepCopy(), &changes); | |
| 292 } else { | |
| 293 // Similarly, pretend it's an add. | |
| 294 LOG(WARNING) << "Got update from sync for nonexistent setting" << | |
| 295 extension_id_ << "/" << key; | |
| 296 error = OnSyncAdd(key, value.DeepCopy(), &changes); | |
| 297 } | |
| 298 break; | |
| 299 | |
| 300 case syncer::SyncChange::ACTION_DELETE: | |
| 301 if (current_value.get()) { | |
| 302 error = OnSyncDelete(key, current_value.release(), &changes); | |
| 303 } else { | |
| 304 // Similarly, ignore it. | |
| 305 LOG(WARNING) << "Got delete from sync for nonexistent setting " << | |
| 306 extension_id_ << "/" << key; | |
| 307 } | |
| 308 break; | |
| 309 | |
| 310 default: | |
| 311 NOTREACHED(); | |
| 312 } | |
| 313 | |
| 314 if (error.IsSet()) { | |
| 315 errors.push_back(error); | |
| 316 } | |
| 317 } | |
| 318 | |
| 319 sync_processor_->NotifyChanges(changes); | |
| 320 | |
| 321 observers_->Notify( | |
| 322 &SettingsObserver::OnSettingsChanged, | |
| 323 extension_id_, | |
| 324 settings_namespace::SYNC, | |
| 325 ValueStoreChange::ToJson(changes)); | |
| 326 | |
| 327 // TODO(kalman): Something sensible with multiple errors. | |
| 328 return errors.empty() ? syncer::SyncError() : errors[0]; | |
| 329 } | |
| 330 | |
| 331 syncer::SyncError SyncableSettingsStorage::OnSyncAdd( | |
| 332 const std::string& key, | |
| 333 Value* new_value, | |
| 334 ValueStoreChangeList* changes) { | |
| 335 DCHECK(new_value); | |
| 336 WriteResult result = delegate_->Set(IGNORE_QUOTA, key, *new_value); | |
| 337 if (result->HasError()) { | |
| 338 return syncer::SyncError( | |
| 339 FROM_HERE, | |
| 340 std::string("Error pushing sync add to local settings: ") + | |
| 341 result->error(), | |
| 342 sync_processor_->type()); | |
| 343 } | |
| 344 changes->push_back(ValueStoreChange(key, NULL, new_value)); | |
| 345 return syncer::SyncError(); | |
| 346 } | |
| 347 | |
| 348 syncer::SyncError SyncableSettingsStorage::OnSyncUpdate( | |
| 349 const std::string& key, | |
| 350 Value* old_value, | |
| 351 Value* new_value, | |
| 352 ValueStoreChangeList* changes) { | |
| 353 DCHECK(old_value); | |
| 354 DCHECK(new_value); | |
| 355 WriteResult result = delegate_->Set(IGNORE_QUOTA, key, *new_value); | |
| 356 if (result->HasError()) { | |
| 357 return syncer::SyncError( | |
| 358 FROM_HERE, | |
| 359 std::string("Error pushing sync update to local settings: ") + | |
| 360 result->error(), | |
| 361 sync_processor_->type()); | |
| 362 } | |
| 363 changes->push_back(ValueStoreChange(key, old_value, new_value)); | |
| 364 return syncer::SyncError(); | |
| 365 } | |
| 366 | |
| 367 syncer::SyncError SyncableSettingsStorage::OnSyncDelete( | |
| 368 const std::string& key, | |
| 369 Value* old_value, | |
| 370 ValueStoreChangeList* changes) { | |
| 371 DCHECK(old_value); | |
| 372 WriteResult result = delegate_->Remove(key); | |
| 373 if (result->HasError()) { | |
| 374 return syncer::SyncError( | |
| 375 FROM_HERE, | |
| 376 std::string("Error pushing sync remove to local settings: ") + | |
| 377 result->error(), | |
| 378 sync_processor_->type()); | |
| 379 } | |
| 380 changes->push_back(ValueStoreChange(key, old_value, NULL)); | |
| 381 return syncer::SyncError(); | |
| 382 } | |
| 383 | |
| 384 } // namespace extensions | |
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