sync/internal_api/sync_manager_impl.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 "sync/internal_api/sync_manager_impl.h"
   6
   7 #include <string>
   8
   9 #include "base/base64.h"
  10 #include "base/bind.h"
  11 #include "base/callback.h"
  12 #include "base/command_line.h"
  13 #include "base/compiler_specific.h"
  14 #include "base/json/json_writer.h"
  15 #include "base/memory/ref_counted.h"
  16 #include "base/metrics/histogram.h"
  17 #include "base/observer_list.h"
  18 #include "base/string_number_conversions.h"
  19 #include "base/values.h"
  20 #include "sync/engine/sync_scheduler.h"
  21 #include "sync/engine/syncer_types.h"
  22 #include "sync/internal_api/change_reorder_buffer.h"
  23 #include "sync/internal_api/public/base/model_type.h"
  24 #include "sync/internal_api/public/base/model_type_invalidation_map.h"
  25 #include "sync/internal_api/public/base_node.h"
  26 #include "sync/internal_api/public/configure_reason.h"
  27 #include "sync/internal_api/public/engine/polling_constants.h"
  28 #include "sync/internal_api/public/http_post_provider_factory.h"
  29 #include "sync/internal_api/public/internal_components_factory.h"
  30 #include "sync/internal_api/public/read_node.h"
  31 #include "sync/internal_api/public/read_transaction.h"
  32 #include "sync/internal_api/public/user_share.h"
  33 #include "sync/internal_api/public/util/experiments.h"
  34 #include "sync/internal_api/public/write_node.h"
  35 #include "sync/internal_api/public/write_transaction.h"
  36 #include "sync/internal_api/syncapi_internal.h"
  37 #include "sync/internal_api/syncapi_server_connection_manager.h"
  38 #include "sync/js/js_arg_list.h"
  39 #include "sync/js/js_event_details.h"
  40 #include "sync/js/js_event_handler.h"
  41 #include "sync/js/js_reply_handler.h"
  42 #include "sync/notifier/invalidation_util.h"
  43 #include "sync/notifier/invalidator.h"
  44 #include "sync/protocol/proto_value_conversions.h"
  45 #include "sync/protocol/sync.pb.h"
  46 #include "sync/syncable/directory.h"
  47 #include "sync/syncable/entry.h"
  48 #include "sync/syncable/in_memory_directory_backing_store.h"
  49 #include "sync/syncable/on_disk_directory_backing_store.h"
  50
  51 using base::TimeDelta;
  52 using sync_pb::GetUpdatesCallerInfo;
  53
  54 namespace syncer {
  55
  56 using sessions::SyncSessionContext;
  57 using syncable::ImmutableWriteTransactionInfo;
  58 using syncable::SPECIFICS;
  59
  60 namespace {
  61
  62 // Delays for syncer nudges.
  63 static const int kDefaultNudgeDelayMilliseconds = 200;
  64 static const int kPreferencesNudgeDelayMilliseconds = 2000;
  65 static const int kSyncRefreshDelayMsec = 500;
  66 static const int kSyncSchedulerDelayMsec = 250;
  67
  68 // Maximum count and size for traffic recorder.
  69 static const unsigned int kMaxMessagesToRecord = 10;
  70 static const unsigned int kMaxMessageSizeToRecord = 5 * 1024;
  71
  72 GetUpdatesCallerInfo::GetUpdatesSource GetSourceFromReason(
  73     ConfigureReason reason) {
  74   switch (reason) {
  75     case CONFIGURE_REASON_RECONFIGURATION:
  76       return GetUpdatesCallerInfo::RECONFIGURATION;
  77     case CONFIGURE_REASON_MIGRATION:
  78       return GetUpdatesCallerInfo::MIGRATION;
  79     case CONFIGURE_REASON_NEW_CLIENT:
  80       return GetUpdatesCallerInfo::NEW_CLIENT;
  81     case CONFIGURE_REASON_NEWLY_ENABLED_DATA_TYPE:
  82       return GetUpdatesCallerInfo::NEWLY_SUPPORTED_DATATYPE;
  83     default:
  84       NOTREACHED();
  85   }
  86   return GetUpdatesCallerInfo::UNKNOWN;
  87 }
  88
  89 }  // namespace
  90
  91 // A class to calculate nudge delays for types.
  92 class NudgeStrategy {
  93  public:
  94   static TimeDelta GetNudgeDelayTimeDelta(const ModelType& model_type,
  95                                           SyncManagerImpl* core) {
  96     NudgeDelayStrategy delay_type = GetNudgeDelayStrategy(model_type);
  97     return GetNudgeDelayTimeDeltaFromType(delay_type,
  98                                           model_type,
  99                                           core);
 100   }
 101
 102  private:
 103   // Possible types of nudge delay for datatypes.
 104   // Note: These are just hints. If a sync happens then all dirty entries
 105   // would be committed as part of the sync.
 106   enum NudgeDelayStrategy {
 107     // Sync right away.
 108     IMMEDIATE,
 109
 110     // Sync this change while syncing another change.
 111     ACCOMPANY_ONLY,
 112
 113     // The datatype does not use one of the predefined wait times but defines
 114     // its own wait time logic for nudge.
 115     CUSTOM,
 116   };
 117
 118   static NudgeDelayStrategy GetNudgeDelayStrategy(const ModelType& type) {
 119     switch (type) {
 120      case AUTOFILL:
 121        return ACCOMPANY_ONLY;
 122      case PREFERENCES:
 123      case SESSIONS:
 124        return CUSTOM;
 125      default:
 126        return IMMEDIATE;
 127     }
 128   }
 129
 130   static TimeDelta GetNudgeDelayTimeDeltaFromType(
 131       const NudgeDelayStrategy& delay_type, const ModelType& model_type,
 132       const SyncManagerImpl* core) {
 133     CHECK(core);
 134     TimeDelta delay = TimeDelta::FromMilliseconds(
 135        kDefaultNudgeDelayMilliseconds);
 136     switch (delay_type) {
 137      case IMMEDIATE:
 138        delay = TimeDelta::FromMilliseconds(
 139            kDefaultNudgeDelayMilliseconds);
 140        break;
 141      case ACCOMPANY_ONLY:
 142        delay = TimeDelta::FromSeconds(kDefaultShortPollIntervalSeconds);
 143        break;
 144      case CUSTOM:
 145        switch (model_type) {
 146          case PREFERENCES:
 147            delay = TimeDelta::FromMilliseconds(
 148                kPreferencesNudgeDelayMilliseconds);
 149            break;
 150          case SESSIONS:
 151            delay = core->scheduler()->GetSessionsCommitDelay();
 152            break;
 153          default:
 154            NOTREACHED();
 155        }
 156        break;
 157      default:
 158        NOTREACHED();
 159     }
 160     return delay;
 161   }
 162 };
 163
 164 SyncManagerImpl::SyncManagerImpl(const std::string& name)
 165     : name_(name),
 166       weak_ptr_factory_(ALLOW_THIS_IN_INITIALIZER_LIST(this)),
 167       change_delegate_(NULL),
 168       initialized_(false),
 169       observing_network_connectivity_changes_(false),
 170       invalidator_state_(DEFAULT_INVALIDATION_ERROR),
 171       throttled_data_type_tracker_(&allstatus_),
 172       traffic_recorder_(kMaxMessagesToRecord, kMaxMessageSizeToRecord),
 173       encryptor_(NULL),
 174       unrecoverable_error_handler_(NULL),
 175       report_unrecoverable_error_function_(NULL) {
 176   // Pre-fill |notification_info_map_|.
 177   for (int i = FIRST_REAL_MODEL_TYPE; i < MODEL_TYPE_COUNT; ++i) {
 178     notification_info_map_.insert(
 179         std::make_pair(ModelTypeFromInt(i), NotificationInfo()));
 180   }
 181
 182   // Bind message handlers.
 183   BindJsMessageHandler(
 184       "getNotificationState",
 185       &SyncManagerImpl::GetNotificationState);
 186   BindJsMessageHandler(
 187       "getNotificationInfo",
 188       &SyncManagerImpl::GetNotificationInfo);
 189   BindJsMessageHandler(
 190       "getRootNodeDetails",
 191       &SyncManagerImpl::GetRootNodeDetails);
 192   BindJsMessageHandler(
 193       "getNodeSummariesById",
 194       &SyncManagerImpl::GetNodeSummariesById);
 195   BindJsMessageHandler(
 196      "getNodeDetailsById",
 197       &SyncManagerImpl::GetNodeDetailsById);
 198   BindJsMessageHandler(
 199       "getAllNodes",
 200       &SyncManagerImpl::GetAllNodes);
 201   BindJsMessageHandler(
 202       "getChildNodeIds",
 203       &SyncManagerImpl::GetChildNodeIds);
 204   BindJsMessageHandler(
 205       "getClientServerTraffic",
 206       &SyncManagerImpl::GetClientServerTraffic);
 207 }
 208
 209 SyncManagerImpl::~SyncManagerImpl() {
 210   DCHECK(thread_checker_.CalledOnValidThread());
 211   CHECK(!initialized_);
 212 }
 213
 214 SyncManagerImpl::NotificationInfo::NotificationInfo() : total_count(0) {}
 215 SyncManagerImpl::NotificationInfo::~NotificationInfo() {}
 216
 217 DictionaryValue* SyncManagerImpl::NotificationInfo::ToValue() const {
 218   DictionaryValue* value = new DictionaryValue();
 219   value->SetInteger("totalCount", total_count);
 220   value->SetString("payload", payload);
 221   return value;
 222 }
 223
 224 bool SyncManagerImpl::VisiblePositionsDiffer(
 225     const syncable::EntryKernelMutation& mutation) const {
 226   const syncable::EntryKernel& a = mutation.original;
 227   const syncable::EntryKernel& b = mutation.mutated;
 228   // If the datatype isn't one where the browser model cares about position,
 229   // don't bother notifying that data model of position-only changes.
 230   if (!ShouldMaintainPosition(GetModelTypeFromSpecifics(b.ref(SPECIFICS)))) {
 231     return false;
 232   }
 233   if (a.ref(syncable::NEXT_ID) != b.ref(syncable::NEXT_ID))
 234     return true;
 235   if (a.ref(syncable::PARENT_ID) != b.ref(syncable::PARENT_ID))
 236     return true;
 237   return false;
 238 }
 239
 240 bool SyncManagerImpl::VisiblePropertiesDiffer(
 241     const syncable::EntryKernelMutation& mutation,
 242     Cryptographer* cryptographer) const {
 243   const syncable::EntryKernel& a = mutation.original;
 244   const syncable::EntryKernel& b = mutation.mutated;
 245   const sync_pb::EntitySpecifics& a_specifics = a.ref(SPECIFICS);
 246   const sync_pb::EntitySpecifics& b_specifics = b.ref(SPECIFICS);
 247   DCHECK_EQ(GetModelTypeFromSpecifics(a_specifics),
 248             GetModelTypeFromSpecifics(b_specifics));
 249   ModelType model_type = GetModelTypeFromSpecifics(b_specifics);
 250   // Suppress updates to items that aren't tracked by any browser model.
 251   if (model_type < FIRST_REAL_MODEL_TYPE ||
 252       !a.ref(syncable::UNIQUE_SERVER_TAG).empty()) {
 253     return false;
 254   }
 255   if (a.ref(syncable::IS_DIR) != b.ref(syncable::IS_DIR))
 256     return true;
 257   if (!AreSpecificsEqual(cryptographer,
 258                          a.ref(syncable::SPECIFICS),
 259                          b.ref(syncable::SPECIFICS))) {
 260     return true;
 261   }
 262   // We only care if the name has changed if neither specifics is encrypted
 263   // (encrypted nodes blow away the NON_UNIQUE_NAME).
 264   if (!a_specifics.has_encrypted() && !b_specifics.has_encrypted() &&
 265       a.ref(syncable::NON_UNIQUE_NAME) != b.ref(syncable::NON_UNIQUE_NAME))
 266     return true;
 267   if (VisiblePositionsDiffer(mutation))
 268     return true;
 269   return false;
 270 }
 271
 272 void SyncManagerImpl::ThrowUnrecoverableError() {
 273   DCHECK(thread_checker_.CalledOnValidThread());
 274   ReadTransaction trans(FROM_HERE, GetUserShare());
 275   trans.GetWrappedTrans()->OnUnrecoverableError(
 276       FROM_HERE, "Simulating unrecoverable error for testing purposes.");
 277 }
 278
 279 ModelTypeSet SyncManagerImpl::InitialSyncEndedTypes() {
 280   return directory()->InitialSyncEndedTypes();
 281 }
 282
 283 ModelTypeSet SyncManagerImpl::GetTypesWithEmptyProgressMarkerToken(
 284     ModelTypeSet types) {
 285   ModelTypeSet result;
 286   for (ModelTypeSet::Iterator i = types.First(); i.Good(); i.Inc()) {
 287     sync_pb::DataTypeProgressMarker marker;
 288     directory()->GetDownloadProgress(i.Get(), &marker);
 289
 290     if (marker.token().empty())
 291       result.Put(i.Get());
 292
 293   }
 294   return result;
 295 }
 296
 297 void SyncManagerImpl::ConfigureSyncer(
 298     ConfigureReason reason,
 299     ModelTypeSet types_to_config,
 300     const ModelSafeRoutingInfo& new_routing_info,
 301     const base::Closure& ready_task,
 302     const base::Closure& retry_task) {
 303   DCHECK(thread_checker_.CalledOnValidThread());
 304   DCHECK(!ready_task.is_null());
 305   DCHECK(!retry_task.is_null());
 306
 307   // Cleanup any types that might have just been disabled.
 308   ModelTypeSet previous_types = ModelTypeSet::All();
 309   if (!session_context_->routing_info().empty())
 310     previous_types = GetRoutingInfoTypes(session_context_->routing_info());
 311   if (!PurgeDisabledTypes(previous_types,
 312                           GetRoutingInfoTypes(new_routing_info))) {
 313     // We failed to cleanup the types. Invoke the ready task without actually
 314     // configuring any types. The caller should detect this as a configuration
 315     // failure and act appropriately.
 316     ready_task.Run();
 317     return;
 318   }
 319
 320   ConfigurationParams params(GetSourceFromReason(reason),
 321                              types_to_config,
 322                              new_routing_info,
 323                              ready_task);
 324
 325   scheduler_->Start(SyncScheduler::CONFIGURATION_MODE);
 326   if (!scheduler_->ScheduleConfiguration(params))
 327     retry_task.Run();
 328
 329 }
 330
 331 void SyncManagerImpl::Init(
 332     const FilePath& database_location,
 333     const WeakHandle<JsEventHandler>& event_handler,
 334     const std::string& sync_server_and_path,
 335     int port,
 336     bool use_ssl,
 337     scoped_ptr<HttpPostProviderFactory> post_factory,
 338     const std::vector<ModelSafeWorker*>& workers,
 339     ExtensionsActivityMonitor* extensions_activity_monitor,
 340     SyncManager::ChangeDelegate* change_delegate,
 341     const SyncCredentials& credentials,
 342     scoped_ptr<Invalidator> invalidator,
 343     const std::string& restored_key_for_bootstrapping,
 344     const std::string& restored_keystore_key_for_bootstrapping,
 345     scoped_ptr<InternalComponentsFactory> internal_components_factory,
 346     Encryptor* encryptor,
 347     UnrecoverableErrorHandler* unrecoverable_error_handler,
 348     ReportUnrecoverableErrorFunction report_unrecoverable_error_function) {
 349   CHECK(!initialized_);
 350   DCHECK(thread_checker_.CalledOnValidThread());
 351   DCHECK(post_factory.get());
 352   DCHECK(!credentials.email.empty());
 353   DCHECK(!credentials.sync_token.empty());
 354   DVLOG(1) << "SyncManager starting Init...";
 355
 356   weak_handle_this_ = MakeWeakHandle(weak_ptr_factory_.GetWeakPtr());
 357
 358   change_delegate_ = change_delegate;
 359
 360   invalidator_ = invalidator.Pass();
 361   invalidator_->RegisterHandler(this);
 362
 363   AddObserver(&js_sync_manager_observer_);
 364   SetJsEventHandler(event_handler);
 365
 366   AddObserver(&debug_info_event_listener_);
 367
 368   database_path_ = database_location.Append(
 369       syncable::Directory::kSyncDatabaseFilename);
 370   encryptor_ = encryptor;
 371   unrecoverable_error_handler_ = unrecoverable_error_handler;
 372   report_unrecoverable_error_function_ = report_unrecoverable_error_function;
 373
 374   allstatus_.SetHasKeystoreKey(
 375       !restored_keystore_key_for_bootstrapping.empty());
 376   sync_encryption_handler_.reset(new SyncEncryptionHandlerImpl(
 377       &share_,
 378       encryptor,
 379       restored_key_for_bootstrapping,
 380       restored_keystore_key_for_bootstrapping));
 381   sync_encryption_handler_->AddObserver(this);
 382   sync_encryption_handler_->AddObserver(&debug_info_event_listener_);
 383   sync_encryption_handler_->AddObserver(&js_sync_encryption_handler_observer_);
 384
 385   FilePath absolute_db_path(database_path_);
 386   file_util::AbsolutePath(&absolute_db_path);
 387   scoped_ptr<syncable::DirectoryBackingStore> backing_store =
 388       internal_components_factory->BuildDirectoryBackingStore(
 389           credentials.email, absolute_db_path).Pass();
 390
 391   DCHECK(backing_store.get());
 392   share_.name = credentials.email;
 393   share_.directory.reset(
 394       new syncable::Directory(
 395           backing_store.release(),
 396           unrecoverable_error_handler_,
 397           report_unrecoverable_error_function_,
 398           sync_encryption_handler_.get(),
 399           sync_encryption_handler_->GetCryptographerUnsafe()));
 400
 401   DVLOG(1) << "Username: " << username_for_share();
 402   if (!OpenDirectory()) {
 403     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 404                       OnInitializationComplete(
 405                           MakeWeakHandle(weak_ptr_factory_.GetWeakPtr()),
 406                           MakeWeakHandle(
 407                               debug_info_event_listener_.GetWeakPtr()),
 408                           false, ModelTypeSet()));
 409     LOG(ERROR) << "Sync manager initialization failed!";
 410     return;
 411   }
 412
 413   connection_manager_.reset(new SyncAPIServerConnectionManager(
 414       sync_server_and_path, port, use_ssl, post_factory.release()));
 415   connection_manager_->set_client_id(directory()->cache_guid());
 416   connection_manager_->AddListener(this);
 417
 418   // Retrieve and set the sync notifier state.
 419   std::string unique_id = directory()->cache_guid();
 420   DVLOG(1) << "Read notification unique ID: " << unique_id;
 421   allstatus_.SetUniqueId(unique_id);
 422   invalidator_->SetUniqueId(unique_id);
 423
 424   std::string state = directory()->GetNotificationState();
 425   if (VLOG_IS_ON(1)) {
 426     std::string encoded_state;
 427     base::Base64Encode(state, &encoded_state);
 428     DVLOG(1) << "Read notification state: " << encoded_state;
 429   }
 430
 431   // TODO(tim): Remove once invalidation state has been migrated to new
 432   // InvalidationStateTracker store. Bug 124140.
 433   invalidator_->SetStateDeprecated(state);
 434
 435   // Build a SyncSessionContext and store the worker in it.
 436   DVLOG(1) << "Sync is bringing up SyncSessionContext.";
 437   std::vector<SyncEngineEventListener*> listeners;
 438   listeners.push_back(&allstatus_);
 439   listeners.push_back(this);
 440   session_context_ = internal_components_factory->BuildContext(
 441       connection_manager_.get(),
 442       directory(),
 443       workers,
 444       extensions_activity_monitor,
 445       &throttled_data_type_tracker_,
 446       listeners,
 447       &debug_info_event_listener_,
 448       &traffic_recorder_).Pass();
 449   session_context_->set_account_name(credentials.email);
 450   scheduler_ = internal_components_factory->BuildScheduler(
 451       name_, session_context_.get()).Pass();
 452
 453   scheduler_->Start(SyncScheduler::CONFIGURATION_MODE);
 454
 455   initialized_ = true;
 456
 457   net::NetworkChangeNotifier::AddIPAddressObserver(this);
 458   net::NetworkChangeNotifier::AddConnectionTypeObserver(this);
 459   observing_network_connectivity_changes_ = true;
 460
 461   UpdateCredentials(credentials);
 462
 463   FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 464                     OnInitializationComplete(
 465                         MakeWeakHandle(weak_ptr_factory_.GetWeakPtr()),
 466                         MakeWeakHandle(debug_info_event_listener_.GetWeakPtr()),
 467                         true, InitialSyncEndedTypes()));
 468 }
 469
 470 void SyncManagerImpl::OnPassphraseRequired(
 471     PassphraseRequiredReason reason,
 472     const sync_pb::EncryptedData& pending_keys) {
 473   // Does nothing.
 474 }
 475
 476 void SyncManagerImpl::OnPassphraseAccepted() {
 477   // Does nothing.
 478 }
 479
 480 void SyncManagerImpl::OnBootstrapTokenUpdated(
 481     const std::string& bootstrap_token,
 482     BootstrapTokenType type) {
 483   if (type == KEYSTORE_BOOTSTRAP_TOKEN)
 484     allstatus_.SetHasKeystoreKey(true);
 485 }
 486
 487 void SyncManagerImpl::OnEncryptedTypesChanged(ModelTypeSet encrypted_types,
 488                                               bool encrypt_everything) {
 489   allstatus_.SetEncryptedTypes(encrypted_types);
 490 }
 491
 492 void SyncManagerImpl::OnEncryptionComplete() {
 493   // Does nothing.
 494 }
 495
 496 void SyncManagerImpl::OnCryptographerStateChanged(
 497     Cryptographer* cryptographer) {
 498   allstatus_.SetCryptographerReady(cryptographer->is_ready());
 499   allstatus_.SetCryptoHasPendingKeys(cryptographer->has_pending_keys());
 500   allstatus_.SetKeystoreMigrationTime(
 501       sync_encryption_handler_->migration_time());
 502 }
 503
 504 void SyncManagerImpl::OnPassphraseTypeChanged(
 505     PassphraseType type,
 506     base::Time explicit_passphrase_time) {
 507   allstatus_.SetPassphraseType(type);
 508   allstatus_.SetKeystoreMigrationTime(
 509       sync_encryption_handler_->migration_time());
 510 }
 511
 512 void SyncManagerImpl::StartSyncingNormally(
 513     const ModelSafeRoutingInfo& routing_info) {
 514   // Start the sync scheduler.
 515   // TODO(sync): We always want the newest set of routes when we switch back
 516   // to normal mode. Figure out how to enforce set_routing_info is always
 517   // appropriately set and that it's only modified when switching to normal
 518   // mode.
 519   DCHECK(thread_checker_.CalledOnValidThread());
 520   session_context_->set_routing_info(routing_info);
 521   scheduler_->Start(SyncScheduler::NORMAL_MODE);
 522 }
 523
 524 syncable::Directory* SyncManagerImpl::directory() {
 525   return share_.directory.get();
 526 }
 527
 528 const SyncScheduler* SyncManagerImpl::scheduler() const {
 529   return scheduler_.get();
 530 }
 531
 532 bool SyncManagerImpl::GetHasInvalidAuthTokenForTest() const {
 533   return connection_manager_->HasInvalidAuthToken();
 534 }
 535
 536 bool SyncManagerImpl::OpenDirectory() {
 537   DCHECK(!initialized_) << "Should only happen once";
 538
 539   // Set before Open().
 540   change_observer_ = MakeWeakHandle(js_mutation_event_observer_.AsWeakPtr());
 541   WeakHandle<syncable::TransactionObserver> transaction_observer(
 542       MakeWeakHandle(js_mutation_event_observer_.AsWeakPtr()));
 543
 544   syncable::DirOpenResult open_result = syncable::NOT_INITIALIZED;
 545   open_result = directory()->Open(username_for_share(), this,
 546                                   transaction_observer);
 547   if (open_result != syncable::OPENED) {
 548     LOG(ERROR) << "Could not open share for:" << username_for_share();
 549     return false;
 550   }
 551
 552   // Unapplied datatypes (those that do not have initial sync ended set) get
 553   // re-downloaded during any configuration. But, it's possible for a datatype
 554   // to have a progress marker but not have initial sync ended yet, making
 555   // it a candidate for migration. This is a problem, as the DataTypeManager
 556   // does not support a migration while it's already in the middle of a
 557   // configuration. As a result, any partially synced datatype can stall the
 558   // DTM, waiting for the configuration to complete, which it never will due
 559   // to the migration error. In addition, a partially synced nigori will
 560   // trigger the migration logic before the backend is initialized, resulting
 561   // in crashes. We therefore detect and purge any partially synced types as
 562   // part of initialization.
 563   if (!PurgePartiallySyncedTypes())
 564     return false;
 565
 566   return true;
 567 }
 568
 569 bool SyncManagerImpl::PurgePartiallySyncedTypes() {
 570   ModelTypeSet partially_synced_types = ModelTypeSet::All();
 571   partially_synced_types.RemoveAll(InitialSyncEndedTypes());
 572   partially_synced_types.RemoveAll(GetTypesWithEmptyProgressMarkerToken(
 573       ModelTypeSet::All()));
 574
 575   DVLOG(1) << "Purging partially synced types "
 576            << ModelTypeSetToString(partially_synced_types);
 577   UMA_HISTOGRAM_COUNTS("Sync.PartiallySyncedTypes",
 578                        partially_synced_types.Size());
 579   if (partially_synced_types.Empty())
 580     return true;
 581   return directory()->PurgeEntriesWithTypeIn(partially_synced_types);
 582 }
 583
 584 bool SyncManagerImpl::PurgeDisabledTypes(
 585     ModelTypeSet previously_enabled_types,
 586     ModelTypeSet currently_enabled_types) {
 587   ModelTypeSet disabled_types = Difference(previously_enabled_types,
 588                                            currently_enabled_types);
 589   if (disabled_types.Empty())
 590     return true;
 591
 592   DVLOG(1) << "Purging disabled types "
 593            << ModelTypeSetToString(disabled_types);
 594   return directory()->PurgeEntriesWithTypeIn(disabled_types);
 595 }
 596
 597 void SyncManagerImpl::UpdateCredentials(
 598     const SyncCredentials& credentials) {
 599   DCHECK(thread_checker_.CalledOnValidThread());
 600   DCHECK(initialized_);
 601   DCHECK_EQ(credentials.email, share_.name);
 602   DCHECK(!credentials.email.empty());
 603   DCHECK(!credentials.sync_token.empty());
 604
 605   observing_network_connectivity_changes_ = true;
 606   if (!connection_manager_->set_auth_token(credentials.sync_token))
 607     return;  // Auth token is known to be invalid, so exit early.
 608
 609   invalidator_->UpdateCredentials(credentials.email, credentials.sync_token);
 610   scheduler_->OnCredentialsUpdated();
 611 }
 612
 613 void SyncManagerImpl::UpdateEnabledTypes(ModelTypeSet enabled_types) {
 614   DCHECK(thread_checker_.CalledOnValidThread());
 615   DCHECK(initialized_);
 616   invalidator_->UpdateRegisteredIds(
 617       this,
 618       ModelTypeSetToObjectIdSet(enabled_types));
 619 }
 620
 621 void SyncManagerImpl::RegisterInvalidationHandler(
 622     InvalidationHandler* handler) {
 623   DCHECK(thread_checker_.CalledOnValidThread());
 624   DCHECK(initialized_);
 625   invalidator_->RegisterHandler(handler);
 626 }
 627
 628 void SyncManagerImpl::UpdateRegisteredInvalidationIds(
 629     InvalidationHandler* handler,
 630     const ObjectIdSet& ids) {
 631   DCHECK(thread_checker_.CalledOnValidThread());
 632   DCHECK(initialized_);
 633   invalidator_->UpdateRegisteredIds(handler, ids);
 634 }
 635
 636 void SyncManagerImpl::UnregisterInvalidationHandler(
 637     InvalidationHandler* handler) {
 638   DCHECK(thread_checker_.CalledOnValidThread());
 639   DCHECK(initialized_);
 640   invalidator_->UnregisterHandler(handler);
 641 }
 642
 643 void SyncManagerImpl::AddObserver(SyncManager::Observer* observer) {
 644   DCHECK(thread_checker_.CalledOnValidThread());
 645   observers_.AddObserver(observer);
 646 }
 647
 648 void SyncManagerImpl::RemoveObserver(SyncManager::Observer* observer) {
 649   DCHECK(thread_checker_.CalledOnValidThread());
 650   observers_.RemoveObserver(observer);
 651 }
 652
 653 void SyncManagerImpl::StopSyncingForShutdown(const base::Closure& callback) {
 654   DVLOG(2) << "StopSyncingForShutdown";
 655   scheduler_->RequestStop(callback);
 656   if (connection_manager_.get())
 657     connection_manager_->TerminateAllIO();
 658 }
 659
 660 void SyncManagerImpl::ShutdownOnSyncThread() {
 661   DCHECK(thread_checker_.CalledOnValidThread());
 662
 663   // Prevent any in-flight method calls from running.  Also
 664   // invalidates |weak_handle_this_| and |change_observer_|.
 665   weak_ptr_factory_.InvalidateWeakPtrs();
 666   js_mutation_event_observer_.InvalidateWeakPtrs();
 667
 668   scheduler_.reset();
 669   session_context_.reset();
 670
 671   if (sync_encryption_handler_.get()) {
 672     sync_encryption_handler_->RemoveObserver(&debug_info_event_listener_);
 673     sync_encryption_handler_->RemoveObserver(this);
 674   }
 675
 676   SetJsEventHandler(WeakHandle<JsEventHandler>());
 677   RemoveObserver(&js_sync_manager_observer_);
 678
 679   RemoveObserver(&debug_info_event_listener_);
 680
 681   // |invalidator_| and |connection_manager_| may end up being NULL here in
 682   // tests (in synchronous initialization mode).
 683   //
 684   // TODO(akalin): Fix this behavior.
 685
 686   if (invalidator_.get())
 687     invalidator_->UnregisterHandler(this);
 688   invalidator_.reset();
 689
 690   if (connection_manager_.get())
 691     connection_manager_->RemoveListener(this);
 692   connection_manager_.reset();
 693
 694   net::NetworkChangeNotifier::RemoveIPAddressObserver(this);
 695   net::NetworkChangeNotifier::RemoveConnectionTypeObserver(this);
 696   observing_network_connectivity_changes_ = false;
 697
 698   if (initialized_ && directory()) {
 699     directory()->SaveChanges();
 700   }
 701
 702   share_.directory.reset();
 703
 704   change_delegate_ = NULL;
 705
 706   initialized_ = false;
 707
 708   // We reset these here, since only now we know they will not be
 709   // accessed from other threads (since we shut down everything).
 710   change_observer_.Reset();
 711   weak_handle_this_.Reset();
 712 }
 713
 714 void SyncManagerImpl::OnIPAddressChanged() {
 715   if (!observing_network_connectivity_changes_) {
 716     DVLOG(1) << "IP address change dropped.";
 717     return;
 718   }
 719   DVLOG(1) << "IP address change detected.";
 720   OnNetworkConnectivityChangedImpl();
 721 }
 722
 723 void SyncManagerImpl::OnConnectionTypeChanged(
 724   net::NetworkChangeNotifier::ConnectionType) {
 725   if (!observing_network_connectivity_changes_) {
 726     DVLOG(1) << "Connection type change dropped.";
 727     return;
 728   }
 729   DVLOG(1) << "Connection type change detected.";
 730   OnNetworkConnectivityChangedImpl();
 731 }
 732
 733 void SyncManagerImpl::OnNetworkConnectivityChangedImpl() {
 734   DCHECK(thread_checker_.CalledOnValidThread());
 735   scheduler_->OnConnectionStatusChange();
 736 }
 737
 738 void SyncManagerImpl::OnServerConnectionEvent(
 739     const ServerConnectionEvent& event) {
 740   DCHECK(thread_checker_.CalledOnValidThread());
 741   if (event.connection_code ==
 742       HttpResponse::SERVER_CONNECTION_OK) {
 743     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 744                       OnConnectionStatusChange(CONNECTION_OK));
 745   }
 746
 747   if (event.connection_code == HttpResponse::SYNC_AUTH_ERROR) {
 748     observing_network_connectivity_changes_ = false;
 749     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 750                       OnConnectionStatusChange(CONNECTION_AUTH_ERROR));
 751   }
 752
 753   if (event.connection_code == HttpResponse::SYNC_SERVER_ERROR) {
 754     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 755                       OnConnectionStatusChange(CONNECTION_SERVER_ERROR));
 756   }
 757 }
 758
 759 void SyncManagerImpl::HandleTransactionCompleteChangeEvent(
 760     ModelTypeSet models_with_changes) {
 761   // This notification happens immediately after the transaction mutex is
 762   // released. This allows work to be performed without blocking other threads
 763   // from acquiring a transaction.
 764   if (!change_delegate_)
 765     return;
 766
 767   // Call commit.
 768   for (ModelTypeSet::Iterator it = models_with_changes.First();
 769        it.Good(); it.Inc()) {
 770     change_delegate_->OnChangesComplete(it.Get());
 771     change_observer_.Call(
 772         FROM_HERE,
 773         &SyncManager::ChangeObserver::OnChangesComplete,
 774         it.Get());
 775   }
 776 }
 777
 778 ModelTypeSet
 779 SyncManagerImpl::HandleTransactionEndingChangeEvent(
 780     const ImmutableWriteTransactionInfo& write_transaction_info,
 781     syncable::BaseTransaction* trans) {
 782   // This notification happens immediately before a syncable WriteTransaction
 783   // falls out of scope. It happens while the channel mutex is still held,
 784   // and while the transaction mutex is held, so it cannot be re-entrant.
 785   if (!change_delegate_ || change_records_.empty())
 786     return ModelTypeSet();
 787
 788   // This will continue the WriteTransaction using a read only wrapper.
 789   // This is the last chance for read to occur in the WriteTransaction
 790   // that's closing. This special ReadTransaction will not close the
 791   // underlying transaction.
 792   ReadTransaction read_trans(GetUserShare(), trans);
 793
 794   ModelTypeSet models_with_changes;
 795   for (ChangeRecordMap::const_iterator it = change_records_.begin();
 796       it != change_records_.end(); ++it) {
 797     DCHECK(!it->second.Get().empty());
 798     ModelType type = ModelTypeFromInt(it->first);
 799     change_delegate_->
 800         OnChangesApplied(type, trans->directory()->GetTransactionVersion(type),
 801                          &read_trans, it->second);
 802     change_observer_.Call(FROM_HERE,
 803         &SyncManager::ChangeObserver::OnChangesApplied,
 804         type, write_transaction_info.Get().id, it->second);
 805     models_with_changes.Put(type);
 806   }
 807   change_records_.clear();
 808   return models_with_changes;
 809 }
 810
 811 void SyncManagerImpl::HandleCalculateChangesChangeEventFromSyncApi(
 812     const ImmutableWriteTransactionInfo& write_transaction_info,
 813     syncable::BaseTransaction* trans,
 814     std::vector<int64>* entries_changed) {
 815   // We have been notified about a user action changing a sync model.
 816   LOG_IF(WARNING, !change_records_.empty()) <<
 817       "CALCULATE_CHANGES called with unapplied old changes.";
 818
 819   // The mutated model type, or UNSPECIFIED if nothing was mutated.
 820   ModelTypeSet mutated_model_types;
 821
 822   const syncable::ImmutableEntryKernelMutationMap& mutations =
 823       write_transaction_info.Get().mutations;
 824   for (syncable::EntryKernelMutationMap::const_iterator it =
 825            mutations.Get().begin(); it != mutations.Get().end(); ++it) {
 826     if (!it->second.mutated.ref(syncable::IS_UNSYNCED)) {
 827       continue;
 828     }
 829
 830     ModelType model_type =
 831         GetModelTypeFromSpecifics(it->second.mutated.ref(SPECIFICS));
 832     if (model_type < FIRST_REAL_MODEL_TYPE) {
 833       NOTREACHED() << "Permanent or underspecified item changed via syncapi.";
 834       continue;
 835     }
 836
 837     // Found real mutation.
 838     if (model_type != UNSPECIFIED) {
 839       mutated_model_types.Put(model_type);
 840       entries_changed->push_back(it->second.mutated.ref(syncable::META_HANDLE));
 841     }
 842   }
 843
 844   // Nudge if necessary.
 845   if (!mutated_model_types.Empty()) {
 846     if (weak_handle_this_.IsInitialized()) {
 847       weak_handle_this_.Call(FROM_HERE,
 848                              &SyncManagerImpl::RequestNudgeForDataTypes,
 849                              FROM_HERE,
 850                              mutated_model_types);
 851     } else {
 852       NOTREACHED();
 853     }
 854   }
 855 }
 856
 857 void SyncManagerImpl::SetExtraChangeRecordData(int64 id,
 858     ModelType type, ChangeReorderBuffer* buffer,
 859     Cryptographer* cryptographer, const syncable::EntryKernel& original,
 860     bool existed_before, bool exists_now) {
 861   // If this is a deletion and the datatype was encrypted, we need to decrypt it
 862   // and attach it to the buffer.
 863   if (!exists_now && existed_before) {
 864     sync_pb::EntitySpecifics original_specifics(original.ref(SPECIFICS));
 865     if (type == PASSWORDS) {
 866       // Passwords must use their own legacy ExtraPasswordChangeRecordData.
 867       scoped_ptr<sync_pb::PasswordSpecificsData> data(
 868           DecryptPasswordSpecifics(original_specifics, cryptographer));
 869       if (!data.get()) {
 870         NOTREACHED();
 871         return;
 872       }
 873       buffer->SetExtraDataForId(id, new ExtraPasswordChangeRecordData(*data));
 874     } else if (original_specifics.has_encrypted()) {
 875       // All other datatypes can just create a new unencrypted specifics and
 876       // attach it.
 877       const sync_pb::EncryptedData& encrypted = original_specifics.encrypted();
 878       if (!cryptographer->Decrypt(encrypted, &original_specifics)) {
 879         NOTREACHED();
 880         return;
 881       }
 882     }
 883     buffer->SetSpecificsForId(id, original_specifics);
 884   }
 885 }
 886
 887 void SyncManagerImpl::HandleCalculateChangesChangeEventFromSyncer(
 888     const ImmutableWriteTransactionInfo& write_transaction_info,
 889     syncable::BaseTransaction* trans,
 890     std::vector<int64>* entries_changed) {
 891   // We only expect one notification per sync step, so change_buffers_ should
 892   // contain no pending entries.
 893   LOG_IF(WARNING, !change_records_.empty()) <<
 894       "CALCULATE_CHANGES called with unapplied old changes.";
 895
 896   ChangeReorderBuffer change_buffers[MODEL_TYPE_COUNT];
 897
 898   Cryptographer* crypto = directory()->GetCryptographer(trans);
 899   const syncable::ImmutableEntryKernelMutationMap& mutations =
 900       write_transaction_info.Get().mutations;
 901   for (syncable::EntryKernelMutationMap::const_iterator it =
 902            mutations.Get().begin(); it != mutations.Get().end(); ++it) {
 903     bool existed_before = !it->second.original.ref(syncable::IS_DEL);
 904     bool exists_now = !it->second.mutated.ref(syncable::IS_DEL);
 905
 906     // Omit items that aren't associated with a model.
 907     ModelType type =
 908         GetModelTypeFromSpecifics(it->second.mutated.ref(SPECIFICS));
 909     if (type < FIRST_REAL_MODEL_TYPE)
 910       continue;
 911
 912     int64 handle = it->first;
 913     if (exists_now && !existed_before)
 914       change_buffers[type].PushAddedItem(handle);
 915     else if (!exists_now && existed_before)
 916       change_buffers[type].PushDeletedItem(handle);
 917     else if (exists_now && existed_before &&
 918              VisiblePropertiesDiffer(it->second, crypto)) {
 919       change_buffers[type].PushUpdatedItem(
 920           handle, VisiblePositionsDiffer(it->second));
 921     }
 922
 923     SetExtraChangeRecordData(handle, type, &change_buffers[type], crypto,
 924                              it->second.original, existed_before, exists_now);
 925   }
 926
 927   ReadTransaction read_trans(GetUserShare(), trans);
 928   for (int i = FIRST_REAL_MODEL_TYPE; i < MODEL_TYPE_COUNT; ++i) {
 929     if (!change_buffers[i].IsEmpty()) {
 930       if (change_buffers[i].GetAllChangesInTreeOrder(&read_trans,
 931                                                      &(change_records_[i]))) {
 932         for (size_t j = 0; j < change_records_[i].Get().size(); ++j)
 933           entries_changed->push_back((change_records_[i].Get())[j].id);
 934       }
 935       if (change_records_[i].Get().empty())
 936         change_records_.erase(i);
 937     }
 938   }
 939 }
 940
 941 TimeDelta SyncManagerImpl::GetNudgeDelayTimeDelta(
 942     const ModelType& model_type) {
 943   return NudgeStrategy::GetNudgeDelayTimeDelta(model_type, this);
 944 }
 945
 946 void SyncManagerImpl::RequestNudgeForDataTypes(
 947     const tracked_objects::Location& nudge_location,
 948     ModelTypeSet types) {
 949   debug_info_event_listener_.OnNudgeFromDatatype(types.First().Get());
 950
 951   // TODO(lipalani) : Calculate the nudge delay based on all types.
 952   base::TimeDelta nudge_delay = NudgeStrategy::GetNudgeDelayTimeDelta(
 953       types.First().Get(),
 954       this);
 955   allstatus_.IncrementNudgeCounter(NUDGE_SOURCE_LOCAL);
 956   scheduler_->ScheduleNudgeAsync(nudge_delay,
 957                                  NUDGE_SOURCE_LOCAL,
 958                                  types,
 959                                  nudge_location);
 960 }
 961
 962 void SyncManagerImpl::OnSyncEngineEvent(const SyncEngineEvent& event) {
 963   DCHECK(thread_checker_.CalledOnValidThread());
 964   // Only send an event if this is due to a cycle ending and this cycle
 965   // concludes a canonical "sync" process; that is, based on what is known
 966   // locally we are "all happy" and up-to-date.  There may be new changes on
 967   // the server, but we'll get them on a subsequent sync.
 968   //
 969   // Notifications are sent at the end of every sync cycle, regardless of
 970   // whether we should sync again.
 971   if (event.what_happened == SyncEngineEvent::SYNC_CYCLE_ENDED) {
 972     if (!initialized_) {
 973       LOG(INFO) << "OnSyncCycleCompleted not sent because sync api is not "
 974                 << "initialized";
 975       return;
 976     }
 977
 978     DVLOG(1) << "Sending OnSyncCycleCompleted";
 979     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 980                       OnSyncCycleCompleted(event.snapshot));
 981
 982     // This is here for tests, which are still using p2p notifications.
 983     bool is_notifiable_commit =
 984         (event.snapshot.model_neutral_state().num_successful_commits > 0);
 985     if (is_notifiable_commit) {
 986       if (invalidator_.get()) {
 987         const ObjectIdInvalidationMap& invalidation_map =
 988             ModelTypeInvalidationMapToObjectIdInvalidationMap(
 989                 event.snapshot.source().types);
 990         invalidator_->SendInvalidation(invalidation_map);
 991       } else {
 992         DVLOG(1) << "Not sending invalidation: invalidator_ is NULL";
 993       }
 994     }
 995   }
 996
 997   if (event.what_happened == SyncEngineEvent::STOP_SYNCING_PERMANENTLY) {
 998     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
 999                       OnStopSyncingPermanently());
1000     return;
1001   }
1002
1003   if (event.what_happened == SyncEngineEvent::UPDATED_TOKEN) {
1004     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
1005                       OnUpdatedToken(event.updated_token));
1006     return;
1007   }
1008
1009   if (event.what_happened == SyncEngineEvent::ACTIONABLE_ERROR) {
1010     FOR_EACH_OBSERVER(
1011         SyncManager::Observer, observers_,
1012         OnActionableError(
1013             event.snapshot.model_neutral_state().sync_protocol_error));
1014     return;
1015   }
1016
1017 }
1018
1019 void SyncManagerImpl::SetJsEventHandler(
1020     const WeakHandle<JsEventHandler>& event_handler) {
1021   js_event_handler_ = event_handler;
1022   js_sync_manager_observer_.SetJsEventHandler(js_event_handler_);
1023   js_mutation_event_observer_.SetJsEventHandler(js_event_handler_);
1024   js_sync_encryption_handler_observer_.SetJsEventHandler(js_event_handler_);
1025 }
1026
1027 void SyncManagerImpl::ProcessJsMessage(
1028     const std::string& name, const JsArgList& args,
1029     const WeakHandle<JsReplyHandler>& reply_handler) {
1030   if (!initialized_) {
1031     NOTREACHED();
1032     return;
1033   }
1034
1035   if (!reply_handler.IsInitialized()) {
1036     DVLOG(1) << "Uninitialized reply handler; dropping unknown message "
1037             << name << " with args " << args.ToString();
1038     return;
1039   }
1040
1041   JsMessageHandler js_message_handler = js_message_handlers_[name];
1042   if (js_message_handler.is_null()) {
1043     DVLOG(1) << "Dropping unknown message " << name
1044              << " with args " << args.ToString();
1045     return;
1046   }
1047
1048   reply_handler.Call(FROM_HERE,
1049                      &JsReplyHandler::HandleJsReply,
1050                      name, js_message_handler.Run(args));
1051 }
1052
1053 void SyncManagerImpl::BindJsMessageHandler(
1054     const std::string& name,
1055     UnboundJsMessageHandler unbound_message_handler) {
1056   js_message_handlers_[name] =
1057       base::Bind(unbound_message_handler, base::Unretained(this));
1058 }
1059
1060 DictionaryValue* SyncManagerImpl::NotificationInfoToValue(
1061     const NotificationInfoMap& notification_info) {
1062   DictionaryValue* value = new DictionaryValue();
1063
1064   for (NotificationInfoMap::const_iterator it = notification_info.begin();
1065       it != notification_info.end(); ++it) {
1066     const std::string& model_type_str = ModelTypeToString(it->first);
1067     value->Set(model_type_str, it->second.ToValue());
1068   }
1069
1070   return value;
1071 }
1072
1073 std::string SyncManagerImpl::NotificationInfoToString(
1074     const NotificationInfoMap& notification_info) {
1075   scoped_ptr<DictionaryValue> value(
1076       NotificationInfoToValue(notification_info));
1077   std::string str;
1078   base::JSONWriter::Write(value.get(), &str);
1079   return str;
1080 }
1081
1082 JsArgList SyncManagerImpl::GetNotificationState(
1083     const JsArgList& args) {
1084   const std::string& notification_state =
1085       InvalidatorStateToString(invalidator_state_);
1086   DVLOG(1) << "GetNotificationState: " << notification_state;
1087   ListValue return_args;
1088   return_args.Append(Value::CreateStringValue(notification_state));
1089   return JsArgList(&return_args);
1090 }
1091
1092 JsArgList SyncManagerImpl::GetNotificationInfo(
1093     const JsArgList& args) {
1094   DVLOG(1) << "GetNotificationInfo: "
1095            << NotificationInfoToString(notification_info_map_);
1096   ListValue return_args;
1097   return_args.Append(NotificationInfoToValue(notification_info_map_));
1098   return JsArgList(&return_args);
1099 }
1100
1101 JsArgList SyncManagerImpl::GetRootNodeDetails(
1102     const JsArgList& args) {
1103   ReadTransaction trans(FROM_HERE, GetUserShare());
1104   ReadNode root(&trans);
1105   root.InitByRootLookup();
1106   ListValue return_args;
1107   return_args.Append(root.GetDetailsAsValue());
1108   return JsArgList(&return_args);
1109 }
1110
1111 JsArgList SyncManagerImpl::GetClientServerTraffic(
1112     const JsArgList& args) {
1113   ListValue return_args;
1114   ListValue* value = traffic_recorder_.ToValue();
1115   if (value != NULL)
1116     return_args.Append(value);
1117   return JsArgList(&return_args);
1118 }
1119
1120 namespace {
1121
1122 int64 GetId(const ListValue& ids, int i) {
1123   std::string id_str;
1124   if (!ids.GetString(i, &id_str)) {
1125     return kInvalidId;
1126   }
1127   int64 id = kInvalidId;
1128   if (!base::StringToInt64(id_str, &id)) {
1129     return kInvalidId;
1130   }
1131   return id;
1132 }
1133
1134 JsArgList GetNodeInfoById(const JsArgList& args,
1135                           UserShare* user_share,
1136                           DictionaryValue* (BaseNode::*info_getter)() const) {
1137   CHECK(info_getter);
1138   ListValue return_args;
1139   ListValue* node_summaries = new ListValue();
1140   return_args.Append(node_summaries);
1141   const ListValue* id_list = NULL;
1142   ReadTransaction trans(FROM_HERE, user_share);
1143   if (args.Get().GetList(0, &id_list)) {
1144     CHECK(id_list);
1145     for (size_t i = 0; i < id_list->GetSize(); ++i) {
1146       int64 id = GetId(*id_list, i);
1147       if (id == kInvalidId) {
1148         continue;
1149       }
1150       ReadNode node(&trans);
1151       if (node.InitByIdLookup(id) != BaseNode::INIT_OK) {
1152         continue;
1153       }
1154       node_summaries->Append((node.*info_getter)());
1155     }
1156   }
1157   return JsArgList(&return_args);
1158 }
1159
1160 }  // namespace
1161
1162 JsArgList SyncManagerImpl::GetNodeSummariesById(const JsArgList& args) {
1163   return GetNodeInfoById(args, GetUserShare(), &BaseNode::GetSummaryAsValue);
1164 }
1165
1166 JsArgList SyncManagerImpl::GetNodeDetailsById(const JsArgList& args) {
1167   return GetNodeInfoById(args, GetUserShare(), &BaseNode::GetDetailsAsValue);
1168 }
1169
1170 JsArgList SyncManagerImpl::GetAllNodes(const JsArgList& args) {
1171   ListValue return_args;
1172   ListValue* result = new ListValue();
1173   return_args.Append(result);
1174
1175   ReadTransaction trans(FROM_HERE, GetUserShare());
1176   std::vector<const syncable::EntryKernel*> entry_kernels;
1177   trans.GetDirectory()->GetAllEntryKernels(trans.GetWrappedTrans(),
1178                                            &entry_kernels);
1179
1180   for (std::vector<const syncable::EntryKernel*>::const_iterator it =
1181            entry_kernels.begin(); it != entry_kernels.end(); ++it) {
1182     result->Append((*it)->ToValue(trans.GetCryptographer()));
1183   }
1184
1185   return JsArgList(&return_args);
1186 }
1187
1188 JsArgList SyncManagerImpl::GetChildNodeIds(const JsArgList& args) {
1189   ListValue return_args;
1190   ListValue* child_ids = new ListValue();
1191   return_args.Append(child_ids);
1192   int64 id = GetId(args.Get(), 0);
1193   if (id != kInvalidId) {
1194     ReadTransaction trans(FROM_HERE, GetUserShare());
1195     syncable::Directory::ChildHandles child_handles;
1196     trans.GetDirectory()->GetChildHandlesByHandle(trans.GetWrappedTrans(),
1197                                                   id, &child_handles);
1198     for (syncable::Directory::ChildHandles::const_iterator it =
1199              child_handles.begin(); it != child_handles.end(); ++it) {
1200       child_ids->Append(Value::CreateStringValue(
1201           base::Int64ToString(*it)));
1202     }
1203   }
1204   return JsArgList(&return_args);
1205 }
1206
1207 void SyncManagerImpl::UpdateNotificationInfo(
1208     const ModelTypeInvalidationMap& invalidation_map) {
1209   for (ModelTypeInvalidationMap::const_iterator it = invalidation_map.begin();
1210        it != invalidation_map.end(); ++it) {
1211     NotificationInfo* info = &notification_info_map_[it->first];
1212     info->total_count++;
1213     info->payload = it->second.payload;
1214   }
1215 }
1216
1217 void SyncManagerImpl::OnInvalidatorStateChange(InvalidatorState state) {
1218   const std::string& state_str = InvalidatorStateToString(state);
1219   invalidator_state_ = state;
1220   DVLOG(1) << "Invalidator state changed to: " << state_str;
1221   const bool notifications_enabled =
1222       (invalidator_state_ == INVALIDATIONS_ENABLED);
1223   allstatus_.SetNotificationsEnabled(notifications_enabled);
1224   scheduler_->SetNotificationsEnabled(notifications_enabled);
1225
1226   if (invalidator_state_ == syncer::INVALIDATION_CREDENTIALS_REJECTED) {
1227     // If the invalidator's credentials were rejected, that means that
1228     // our sync credentials are also bad, so invalidate those.
1229     connection_manager_->InvalidateAndClearAuthToken();
1230     FOR_EACH_OBSERVER(SyncManager::Observer, observers_,
1231                       OnConnectionStatusChange(CONNECTION_AUTH_ERROR));
1232   }
1233
1234   if (js_event_handler_.IsInitialized()) {
1235     DictionaryValue details;
1236     details.SetString("state", state_str);
1237     js_event_handler_.Call(FROM_HERE,
1238                            &JsEventHandler::HandleJsEvent,
1239                            "onNotificationStateChange",
1240                            JsEventDetails(&details));
1241   }
1242 }
1243
1244 void SyncManagerImpl::OnIncomingInvalidation(
1245     const ObjectIdInvalidationMap& invalidation_map,
1246     IncomingInvalidationSource source) {
1247   DCHECK(thread_checker_.CalledOnValidThread());
1248   const ModelTypeInvalidationMap& type_invalidation_map =
1249       ObjectIdInvalidationMapToModelTypeInvalidationMap(invalidation_map);
1250   if (source == LOCAL_INVALIDATION) {
1251     allstatus_.IncrementNudgeCounter(NUDGE_SOURCE_LOCAL_REFRESH);
1252     scheduler_->ScheduleNudgeWithStatesAsync(
1253         TimeDelta::FromMilliseconds(kSyncRefreshDelayMsec),
1254         NUDGE_SOURCE_LOCAL_REFRESH,
1255         type_invalidation_map, FROM_HERE);
1256   } else if (!type_invalidation_map.empty()) {
1257     allstatus_.IncrementNudgeCounter(NUDGE_SOURCE_NOTIFICATION);
1258     scheduler_->ScheduleNudgeWithStatesAsync(
1259         TimeDelta::FromMilliseconds(kSyncSchedulerDelayMsec),
1260         NUDGE_SOURCE_NOTIFICATION,
1261         type_invalidation_map, FROM_HERE);
1262     allstatus_.IncrementNotificationsReceived();
1263     UpdateNotificationInfo(type_invalidation_map);
1264     debug_info_event_listener_.OnIncomingNotification(type_invalidation_map);
1265   } else {
1266     LOG(WARNING) << "Sync received invalidation without any type information.";
1267   }
1268
1269   if (js_event_handler_.IsInitialized()) {
1270     DictionaryValue details;
1271     ListValue* changed_types = new ListValue();
1272     details.Set("changedTypes", changed_types);
1273     for (ModelTypeInvalidationMap::const_iterator it =
1274              type_invalidation_map.begin(); it != type_invalidation_map.end();
1275          ++it) {
1276       const std::string& model_type_str =
1277           ModelTypeToString(it->first);
1278       changed_types->Append(Value::CreateStringValue(model_type_str));
1279     }
1280     details.SetString("source", (source == LOCAL_INVALIDATION) ?
1281         "LOCAL_INVALIDATION" : "REMOTE_INVALIDATION");
1282     js_event_handler_.Call(FROM_HERE,
1283                            &JsEventHandler::HandleJsEvent,
1284                            "onIncomingNotification",
1285                            JsEventDetails(&details));
1286   }
1287 }
1288
1289 SyncStatus SyncManagerImpl::GetDetailedStatus() const {
1290   return allstatus_.status();
1291 }
1292
1293 void SyncManagerImpl::SaveChanges() {
1294   directory()->SaveChanges();
1295 }
1296
1297 const std::string& SyncManagerImpl::username_for_share() const {
1298   return share_.name;
1299 }
1300
1301 UserShare* SyncManagerImpl::GetUserShare() {
1302   DCHECK(initialized_);
1303   return &share_;
1304 }
1305
1306 const std::string SyncManagerImpl::cache_guid() {
1307   DCHECK(initialized_);
1308   return directory()->cache_guid();
1309 }
1310
1311 bool SyncManagerImpl::ReceivedExperiment(Experiments* experiments) {
1312   ReadTransaction trans(FROM_HERE, GetUserShare());
1313   ReadNode nigori_node(&trans);
1314   if (nigori_node.InitByTagLookup(kNigoriTag) != BaseNode::INIT_OK) {
1315     DVLOG(1) << "Couldn't find Nigori node.";
1316     return false;
1317   }
1318   bool found_experiment = false;
1319   if (nigori_node.GetNigoriSpecifics().sync_tab_favicons()) {
1320     experiments->sync_tab_favicons = true;
1321     found_experiment = true;
1322   }
1323
1324   ReadNode keystore_node(&trans);
1325   if (keystore_node.InitByClientTagLookup(
1326           syncer::EXPERIMENTS,
1327           syncer::kKeystoreEncryptionTag) == BaseNode::INIT_OK &&
1328       keystore_node.GetExperimentsSpecifics().keystore_encryption().enabled()) {
1329     experiments->keystore_encryption = true;
1330     found_experiment = true;
1331   }
1332
1333   ReadNode autofill_culling_node(&trans);
1334   if (autofill_culling_node.InitByClientTagLookup(
1335           syncer::EXPERIMENTS,
1336           syncer::kAutofillCullingTag) == BaseNode::INIT_OK &&
1337       autofill_culling_node.GetExperimentsSpecifics().
1338           autofill_culling().enabled()) {
1339     experiments->autofill_culling = true;
1340     found_experiment = true;
1341   }
1342
1343   return found_experiment;
1344 }
1345
1346 bool SyncManagerImpl::HasUnsyncedItems() {
1347   ReadTransaction trans(FROM_HERE, GetUserShare());
1348   return (trans.GetWrappedTrans()->directory()->unsynced_entity_count() != 0);
1349 }
1350
1351 SyncEncryptionHandler* SyncManagerImpl::GetEncryptionHandler() {
1352   return sync_encryption_handler_.get();
1353 }
1354
1355 // static.
1356 int SyncManagerImpl::GetDefaultNudgeDelay() {
1357   return kDefaultNudgeDelayMilliseconds;
1358 }
1359
1360 // static.
1361 int SyncManagerImpl::GetPreferencesNudgeDelay() {
1362   return kPreferencesNudgeDelayMilliseconds;
1363 }
1364
1365 }  // namespace syncer