sync_worker.cc revision 6e8cce623b6e4fe0c9e4af605d675dd9d0338c38 
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#include "chrome/browser/sync_file_system/drive_backend/sync_worker.h"
6
7#include <vector>
8
9#include "base/bind.h"
10#include "chrome/browser/drive/drive_service_interface.h"
11#include "chrome/browser/extensions/extension_service.h"
12#include "chrome/browser/sync_file_system/drive_backend/callback_helper.h"
13#include "chrome/browser/sync_file_system/drive_backend/conflict_resolver.h"
14#include "chrome/browser/sync_file_system/drive_backend/drive_backend_constants.h"
15#include "chrome/browser/sync_file_system/drive_backend/list_changes_task.h"
16#include "chrome/browser/sync_file_system/drive_backend/local_to_remote_syncer.h"
17#include "chrome/browser/sync_file_system/drive_backend/metadata_database.h"
18#include "chrome/browser/sync_file_system/drive_backend/register_app_task.h"
19#include "chrome/browser/sync_file_system/drive_backend/remote_change_processor_on_worker.h"
20#include "chrome/browser/sync_file_system/drive_backend/remote_to_local_syncer.h"
21#include "chrome/browser/sync_file_system/drive_backend/sync_engine_context.h"
22#include "chrome/browser/sync_file_system/drive_backend/sync_engine_initializer.h"
23#include "chrome/browser/sync_file_system/drive_backend/sync_task.h"
24#include "chrome/browser/sync_file_system/drive_backend/uninstall_app_task.h"
25#include "chrome/browser/sync_file_system/logger.h"
26#include "chrome/browser/sync_file_system/syncable_file_system_util.h"
27#include "webkit/common/fileapi/file_system_util.h"
28
29namespace sync_file_system {
30
31class RemoteChangeProcessor;
32
33namespace drive_backend {
34
35namespace {
36
37void EmptyStatusCallback(SyncStatusCode status) {}
38
39void InvokeIdleCallback(const base::Closure& idle_callback,
40                        const SyncStatusCallback& callback) {
41  idle_callback.Run();
42  callback.Run(SYNC_STATUS_OK);
43}
44
45}  // namespace
46
47SyncWorker::SyncWorker(
48    const base::FilePath& base_dir,
49    const base::WeakPtr<ExtensionServiceInterface>& extension_service,
50    leveldb::Env* env_override)
51    : base_dir_(base_dir),
52      env_override_(env_override),
53      service_state_(REMOTE_SERVICE_TEMPORARY_UNAVAILABLE),
54      should_check_conflict_(true),
55      should_check_remote_change_(true),
56      listing_remote_changes_(false),
57      sync_enabled_(false),
58      extension_service_(extension_service),
59      weak_ptr_factory_(this) {
60  sequence_checker_.DetachFromSequence();
61  DCHECK(base_dir_.IsAbsolute());
62}
63
64SyncWorker::~SyncWorker() {
65  observers_.Clear();
66}
67
68void SyncWorker::Initialize(scoped_ptr<SyncEngineContext> context) {
69  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
70  DCHECK(!task_manager_);
71
72  context_ = context.Pass();
73
74  task_manager_.reset(new SyncTaskManager(
75      weak_ptr_factory_.GetWeakPtr(), 0 /* maximum_background_task */,
76      context_->GetWorkerTaskRunner()));
77  task_manager_->Initialize(SYNC_STATUS_OK);
78
79  PostInitializeTask();
80}
81
82void SyncWorker::RegisterOrigin(
83    const GURL& origin,
84    const SyncStatusCallback& callback) {
85  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
86
87  if (!GetMetadataDatabase())
88    PostInitializeTask();
89
90  scoped_ptr<RegisterAppTask> task(
91      new RegisterAppTask(context_.get(), origin.host()));
92  if (task->CanFinishImmediately()) {
93    callback.Run(SYNC_STATUS_OK);
94    return;
95  }
96
97  task_manager_->ScheduleSyncTask(
98      FROM_HERE,
99      task.PassAs<SyncTask>(),
100      SyncTaskManager::PRIORITY_HIGH,
101      callback);
102}
103
104void SyncWorker::EnableOrigin(
105    const GURL& origin,
106    const SyncStatusCallback& callback) {
107  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
108
109  task_manager_->ScheduleTask(
110      FROM_HERE,
111      base::Bind(&SyncWorker::DoEnableApp,
112                 weak_ptr_factory_.GetWeakPtr(),
113                 origin.host()),
114      SyncTaskManager::PRIORITY_HIGH,
115      callback);
116}
117
118void SyncWorker::DisableOrigin(
119    const GURL& origin,
120    const SyncStatusCallback& callback) {
121  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
122
123  task_manager_->ScheduleTask(
124      FROM_HERE,
125      base::Bind(&SyncWorker::DoDisableApp,
126                 weak_ptr_factory_.GetWeakPtr(),
127                 origin.host()),
128      SyncTaskManager::PRIORITY_HIGH,
129      callback);
130}
131
132void SyncWorker::UninstallOrigin(
133    const GURL& origin,
134    RemoteFileSyncService::UninstallFlag flag,
135    const SyncStatusCallback& callback) {
136  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
137
138  task_manager_->ScheduleSyncTask(
139      FROM_HERE,
140      scoped_ptr<SyncTask>(
141          new UninstallAppTask(context_.get(), origin.host(), flag)),
142      SyncTaskManager::PRIORITY_HIGH,
143      callback);
144}
145
146void SyncWorker::ProcessRemoteChange(const SyncFileCallback& callback) {
147  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
148
149  RemoteToLocalSyncer* syncer = new RemoteToLocalSyncer(context_.get());
150  task_manager_->ScheduleSyncTask(
151      FROM_HERE,
152      scoped_ptr<SyncTask>(syncer),
153      SyncTaskManager::PRIORITY_MED,
154      base::Bind(&SyncWorker::DidProcessRemoteChange,
155                 weak_ptr_factory_.GetWeakPtr(),
156                 syncer,
157                 callback));
158}
159
160void SyncWorker::SetRemoteChangeProcessor(
161    RemoteChangeProcessorOnWorker* remote_change_processor_on_worker) {
162  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
163
164  context_->SetRemoteChangeProcessor(remote_change_processor_on_worker);
165}
166
167RemoteServiceState SyncWorker::GetCurrentState() const {
168  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
169
170  if (!sync_enabled_)
171    return REMOTE_SERVICE_DISABLED;
172  return service_state_;
173}
174
175void SyncWorker::GetOriginStatusMap(
176    const RemoteFileSyncService::StatusMapCallback& callback) {
177  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
178
179  if (!GetMetadataDatabase())
180    return;
181
182  std::vector<std::string> app_ids;
183  GetMetadataDatabase()->GetRegisteredAppIDs(&app_ids);
184
185  scoped_ptr<RemoteFileSyncService::OriginStatusMap>
186      status_map(new RemoteFileSyncService::OriginStatusMap);
187  for (std::vector<std::string>::const_iterator itr = app_ids.begin();
188       itr != app_ids.end(); ++itr) {
189    const std::string& app_id = *itr;
190    GURL origin = extensions::Extension::GetBaseURLFromExtensionId(app_id);
191    (*status_map)[origin] =
192        GetMetadataDatabase()->IsAppEnabled(app_id) ? "Enabled" : "Disabled";
193  }
194
195  callback.Run(status_map.Pass());
196}
197
198scoped_ptr<base::ListValue> SyncWorker::DumpFiles(const GURL& origin) {
199  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
200
201  if (!GetMetadataDatabase())
202    return scoped_ptr<base::ListValue>();
203  return GetMetadataDatabase()->DumpFiles(origin.host());
204}
205
206scoped_ptr<base::ListValue> SyncWorker::DumpDatabase() {
207  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
208
209  if (!GetMetadataDatabase())
210    return scoped_ptr<base::ListValue>();
211  return GetMetadataDatabase()->DumpDatabase();
212}
213
214void SyncWorker::SetSyncEnabled(bool enabled) {
215  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
216
217  if (sync_enabled_ == enabled)
218    return;
219
220  RemoteServiceState old_state = GetCurrentState();
221  sync_enabled_ = enabled;
222  if (old_state == GetCurrentState())
223    return;
224
225  FOR_EACH_OBSERVER(
226      Observer,
227      observers_,
228      UpdateServiceState(
229          GetCurrentState(),
230          enabled ? "Sync is enabled" : "Sync is disabled"));
231}
232
233void SyncWorker::PromoteDemotedChanges(const base::Closure& callback) {
234  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
235
236  MetadataDatabase* metadata_db = GetMetadataDatabase();
237  if (metadata_db && metadata_db->HasLowPriorityDirtyTracker()) {
238    metadata_db->PromoteLowerPriorityTrackersToNormal();
239    FOR_EACH_OBSERVER(
240        Observer,
241        observers_,
242        OnPendingFileListUpdated(metadata_db->CountDirtyTracker()));
243  }
244  callback.Run();
245}
246
247void SyncWorker::ApplyLocalChange(
248    const FileChange& local_change,
249    const base::FilePath& local_path,
250    const SyncFileMetadata& local_metadata,
251    const fileapi::FileSystemURL& url,
252    const SyncStatusCallback& callback) {
253  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
254
255  LocalToRemoteSyncer* syncer = new LocalToRemoteSyncer(
256      context_.get(), local_metadata, local_change, local_path, url);
257  task_manager_->ScheduleSyncTask(
258      FROM_HERE,
259      scoped_ptr<SyncTask>(syncer),
260      SyncTaskManager::PRIORITY_MED,
261      base::Bind(&SyncWorker::DidApplyLocalChange,
262                 weak_ptr_factory_.GetWeakPtr(),
263                 syncer,
264                 callback));
265}
266
267void SyncWorker::MaybeScheduleNextTask() {
268  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
269
270  if (GetCurrentState() == REMOTE_SERVICE_DISABLED)
271    return;
272
273  // TODO(tzik): Notify observer of OnRemoteChangeQueueUpdated.
274  // TODO(tzik): Add an interface to get the number of dirty trackers to
275  // MetadataDatabase.
276
277  if (MaybeStartFetchChanges())
278    return;
279
280  if (!call_on_idle_callback_.is_null()) {
281    base::Closure callback = call_on_idle_callback_;
282    call_on_idle_callback_.Reset();
283    callback.Run();
284  }
285}
286
287void SyncWorker::NotifyLastOperationStatus(
288    SyncStatusCode status,
289    bool used_network) {
290  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
291
292  UpdateServiceStateFromSyncStatusCode(status, used_network);
293
294  if (GetMetadataDatabase()) {
295    FOR_EACH_OBSERVER(
296        Observer, observers_,
297        OnPendingFileListUpdated(GetMetadataDatabase()->CountDirtyTracker()));
298  }
299}
300
301void SyncWorker::RecordTaskLog(scoped_ptr<TaskLogger::TaskLog> task_log) {
302  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
303
304  context_->GetUITaskRunner()->PostTask(
305      FROM_HERE,
306      base::Bind(&TaskLogger::RecordLog,
307                 context_->GetTaskLogger(),
308                 base::Passed(&task_log)));
309}
310
311void SyncWorker::ActivateService(RemoteServiceState service_state,
312                                 const std::string& description) {
313  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
314  UpdateServiceState(service_state, description);
315  if (!GetMetadataDatabase()) {
316    PostInitializeTask();
317    return;
318  }
319
320  should_check_remote_change_ = true;
321  MaybeScheduleNextTask();
322}
323
324void SyncWorker::DeactivateService(const std::string& description) {
325  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
326  UpdateServiceState(REMOTE_SERVICE_TEMPORARY_UNAVAILABLE, description);
327}
328
329void SyncWorker::DetachFromSequence() {
330  task_manager_->DetachFromSequence();
331  context_->DetachFromSequence();
332  sequence_checker_.DetachFromSequence();
333}
334
335void SyncWorker::AddObserver(Observer* observer) {
336  observers_.AddObserver(observer);
337}
338
339void SyncWorker::DoDisableApp(const std::string& app_id,
340                              const SyncStatusCallback& callback) {
341  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
342
343  if (GetMetadataDatabase()) {
344    GetMetadataDatabase()->DisableApp(app_id, callback);
345  } else {
346    callback.Run(SYNC_STATUS_OK);
347  }
348}
349
350void SyncWorker::DoEnableApp(const std::string& app_id,
351                             const SyncStatusCallback& callback) {
352  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
353
354  if (GetMetadataDatabase()) {
355    GetMetadataDatabase()->EnableApp(app_id, callback);
356  } else {
357    callback.Run(SYNC_STATUS_OK);
358  }
359}
360
361void SyncWorker::PostInitializeTask() {
362  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
363  DCHECK(!GetMetadataDatabase());
364
365  // This initializer task may not run if MetadataDatabase in context_ is
366  // already initialized when it runs.
367  SyncEngineInitializer* initializer =
368      new SyncEngineInitializer(context_.get(),
369                                base_dir_.Append(kDatabaseName),
370                                env_override_);
371  task_manager_->ScheduleSyncTask(
372      FROM_HERE,
373      scoped_ptr<SyncTask>(initializer),
374      SyncTaskManager::PRIORITY_HIGH,
375      base::Bind(&SyncWorker::DidInitialize,
376                 weak_ptr_factory_.GetWeakPtr(),
377                 initializer));
378}
379
380void SyncWorker::DidInitialize(SyncEngineInitializer* initializer,
381                               SyncStatusCode status) {
382  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
383
384  if (status == SYNC_STATUS_ACCESS_FORBIDDEN) {
385    UpdateServiceState(REMOTE_SERVICE_ACCESS_FORBIDDEN, "Access forbidden");
386    return;
387  }
388  if (status != SYNC_STATUS_OK) {
389    UpdateServiceState(REMOTE_SERVICE_TEMPORARY_UNAVAILABLE,
390                       "Could not initialize remote service");
391    return;
392  }
393
394  scoped_ptr<MetadataDatabase> metadata_database =
395      initializer->PassMetadataDatabase();
396  if (metadata_database)
397    context_->SetMetadataDatabase(metadata_database.Pass());
398
399  UpdateRegisteredApps();
400}
401
402void SyncWorker::UpdateRegisteredApps() {
403  MetadataDatabase* metadata_db = GetMetadataDatabase();
404  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
405  DCHECK(metadata_db);
406
407  scoped_ptr<std::vector<std::string> > app_ids(new std::vector<std::string>);
408  metadata_db->GetRegisteredAppIDs(app_ids.get());
409
410  AppStatusMap* app_status = new AppStatusMap;
411  base::Closure callback =
412      base::Bind(&SyncWorker::DidQueryAppStatus,
413                 weak_ptr_factory_.GetWeakPtr(),
414                 base::Owned(app_status));
415
416  context_->GetUITaskRunner()->PostTask(
417      FROM_HERE,
418      base::Bind(&SyncWorker::QueryAppStatusOnUIThread,
419                 extension_service_,
420                 base::Owned(app_ids.release()),
421                 app_status,
422                 RelayCallbackToTaskRunner(
423                     context_->GetWorkerTaskRunner(),
424                     FROM_HERE, callback)));
425}
426
427void SyncWorker::QueryAppStatusOnUIThread(
428    const base::WeakPtr<ExtensionServiceInterface>& extension_service_ptr,
429    const std::vector<std::string>* app_ids,
430    AppStatusMap* status,
431    const base::Closure& callback) {
432  ExtensionServiceInterface* extension_service = extension_service_ptr.get();
433  if (!extension_service) {
434    callback.Run();
435    return;
436  }
437
438  for (std::vector<std::string>::const_iterator itr = app_ids->begin();
439       itr != app_ids->end(); ++itr) {
440    const std::string& app_id = *itr;
441    if (!extension_service->GetInstalledExtension(app_id))
442      (*status)[app_id] = APP_STATUS_UNINSTALLED;
443    else if (!extension_service->IsExtensionEnabled(app_id))
444      (*status)[app_id] = APP_STATUS_DISABLED;
445    else
446      (*status)[app_id] = APP_STATUS_ENABLED;
447  }
448
449  callback.Run();
450}
451
452void SyncWorker::DidQueryAppStatus(const AppStatusMap* app_status) {
453  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
454
455  MetadataDatabase* metadata_db = GetMetadataDatabase();
456  DCHECK(metadata_db);
457
458  // Update the status of every origin using status from ExtensionService.
459  for (AppStatusMap::const_iterator itr = app_status->begin();
460       itr != app_status->end(); ++itr) {
461    const std::string& app_id = itr->first;
462    GURL origin = extensions::Extension::GetBaseURLFromExtensionId(app_id);
463
464    if (itr->second == APP_STATUS_UNINSTALLED) {
465      // Extension has been uninstalled.
466      // (At this stage we can't know if it was unpacked extension or not,
467      // so just purge the remote folder.)
468      UninstallOrigin(origin,
469                      RemoteFileSyncService::UNINSTALL_AND_PURGE_REMOTE,
470                      base::Bind(&EmptyStatusCallback));
471      continue;
472    }
473
474    FileTracker tracker;
475    if (!metadata_db->FindAppRootTracker(app_id, &tracker)) {
476      // App will register itself on first run.
477      continue;
478    }
479
480    DCHECK(itr->second == APP_STATUS_ENABLED ||
481           itr->second == APP_STATUS_DISABLED);
482    bool is_app_enabled = (itr->second == APP_STATUS_ENABLED);
483    bool is_app_root_tracker_enabled =
484        (tracker.tracker_kind() == TRACKER_KIND_APP_ROOT);
485    if (is_app_enabled && !is_app_root_tracker_enabled)
486      EnableOrigin(origin, base::Bind(&EmptyStatusCallback));
487    else if (!is_app_enabled && is_app_root_tracker_enabled)
488      DisableOrigin(origin, base::Bind(&EmptyStatusCallback));
489  }
490}
491
492void SyncWorker::DidProcessRemoteChange(RemoteToLocalSyncer* syncer,
493                                        const SyncFileCallback& callback,
494                                        SyncStatusCode status) {
495  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
496
497  if (syncer->is_sync_root_deletion()) {
498    MetadataDatabase::ClearDatabase(context_->PassMetadataDatabase());
499    PostInitializeTask();
500    callback.Run(status, syncer->url());
501    return;
502  }
503
504  if (status == SYNC_STATUS_OK) {
505    if (syncer->sync_action() != SYNC_ACTION_NONE &&
506        syncer->url().is_valid()) {
507      FOR_EACH_OBSERVER(
508          Observer, observers_,
509          OnFileStatusChanged(
510              syncer->url(),
511              SYNC_FILE_STATUS_SYNCED,
512              syncer->sync_action(),
513              SYNC_DIRECTION_REMOTE_TO_LOCAL));
514    }
515
516    if (syncer->sync_action() == SYNC_ACTION_DELETED &&
517        syncer->url().is_valid() &&
518        fileapi::VirtualPath::IsRootPath(syncer->url().path())) {
519      RegisterOrigin(syncer->url().origin(), base::Bind(&EmptyStatusCallback));
520    }
521    should_check_conflict_ = true;
522  }
523  callback.Run(status, syncer->url());
524}
525
526void SyncWorker::DidApplyLocalChange(LocalToRemoteSyncer* syncer,
527                                     const SyncStatusCallback& callback,
528                                     SyncStatusCode status) {
529  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
530
531  if ((status == SYNC_STATUS_OK || status == SYNC_STATUS_RETRY) &&
532      syncer->url().is_valid() &&
533      syncer->sync_action() != SYNC_ACTION_NONE) {
534    fileapi::FileSystemURL updated_url = syncer->url();
535    if (!syncer->target_path().empty()) {
536      updated_url = CreateSyncableFileSystemURL(syncer->url().origin(),
537                                                syncer->target_path());
538    }
539    FOR_EACH_OBSERVER(Observer, observers_,
540                      OnFileStatusChanged(updated_url,
541                                          SYNC_FILE_STATUS_SYNCED,
542                                          syncer->sync_action(),
543                                          SYNC_DIRECTION_LOCAL_TO_REMOTE));
544  }
545
546  if (status == SYNC_STATUS_UNKNOWN_ORIGIN && syncer->url().is_valid()) {
547    RegisterOrigin(syncer->url().origin(),
548                   base::Bind(&EmptyStatusCallback));
549  }
550
551  if (syncer->needs_remote_change_listing() &&
552      !listing_remote_changes_) {
553    task_manager_->ScheduleSyncTask(
554        FROM_HERE,
555        scoped_ptr<SyncTask>(new ListChangesTask(context_.get())),
556        SyncTaskManager::PRIORITY_HIGH,
557        base::Bind(&SyncWorker::DidFetchChanges,
558                   weak_ptr_factory_.GetWeakPtr()));
559    should_check_remote_change_ = false;
560    listing_remote_changes_ = true;
561    time_to_check_changes_ =
562        base::TimeTicks::Now() +
563        base::TimeDelta::FromSeconds(kListChangesRetryDelaySeconds);
564  }
565
566  if (status == SYNC_STATUS_OK)
567    should_check_conflict_ = true;
568
569  callback.Run(status);
570}
571
572bool SyncWorker::MaybeStartFetchChanges() {
573  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
574
575  if (GetCurrentState() == REMOTE_SERVICE_DISABLED)
576    return false;
577
578  if (!GetMetadataDatabase())
579    return false;
580
581  if (listing_remote_changes_)
582    return false;
583
584  base::TimeTicks now = base::TimeTicks::Now();
585  if (!should_check_remote_change_ && now < time_to_check_changes_) {
586    if (!GetMetadataDatabase()->HasDirtyTracker() &&
587        should_check_conflict_) {
588      should_check_conflict_ = false;
589      return task_manager_->ScheduleSyncTaskIfIdle(
590          FROM_HERE,
591          scoped_ptr<SyncTask>(new ConflictResolver(context_.get())),
592          base::Bind(&SyncWorker::DidResolveConflict,
593                     weak_ptr_factory_.GetWeakPtr()));
594    }
595    return false;
596  }
597
598  if (task_manager_->ScheduleSyncTaskIfIdle(
599          FROM_HERE,
600          scoped_ptr<SyncTask>(new ListChangesTask(context_.get())),
601          base::Bind(&SyncWorker::DidFetchChanges,
602                     weak_ptr_factory_.GetWeakPtr()))) {
603    should_check_remote_change_ = false;
604    listing_remote_changes_ = true;
605    time_to_check_changes_ =
606        now + base::TimeDelta::FromSeconds(kListChangesRetryDelaySeconds);
607    return true;
608  }
609  return false;
610}
611
612void SyncWorker::DidResolveConflict(SyncStatusCode status) {
613  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
614
615  if (status == SYNC_STATUS_OK)
616    should_check_conflict_ = true;
617}
618
619void SyncWorker::DidFetchChanges(SyncStatusCode status) {
620  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
621
622  if (status == SYNC_STATUS_OK)
623    should_check_conflict_ = true;
624  listing_remote_changes_ = false;
625}
626
627void SyncWorker::UpdateServiceStateFromSyncStatusCode(
628    SyncStatusCode status,
629    bool used_network) {
630  switch (status) {
631    case SYNC_STATUS_OK:
632      if (used_network)
633        UpdateServiceState(REMOTE_SERVICE_OK, std::string());
634      break;
635
636    // Authentication error.
637    case SYNC_STATUS_AUTHENTICATION_FAILED:
638      UpdateServiceState(REMOTE_SERVICE_AUTHENTICATION_REQUIRED,
639                         "Authentication required");
640      break;
641
642    // OAuth token error.
643    case SYNC_STATUS_ACCESS_FORBIDDEN:
644      UpdateServiceState(REMOTE_SERVICE_ACCESS_FORBIDDEN,
645                         "Access forbidden");
646      break;
647
648    // Errors which could make the service temporarily unavailable.
649    case SYNC_STATUS_SERVICE_TEMPORARILY_UNAVAILABLE:
650    case SYNC_STATUS_NETWORK_ERROR:
651    case SYNC_STATUS_ABORT:
652    case SYNC_STATUS_FAILED:
653      UpdateServiceState(REMOTE_SERVICE_TEMPORARY_UNAVAILABLE,
654                         "Network or temporary service error.");
655      break;
656
657    // Errors which would require manual user intervention to resolve.
658    case SYNC_DATABASE_ERROR_CORRUPTION:
659    case SYNC_DATABASE_ERROR_IO_ERROR:
660    case SYNC_DATABASE_ERROR_FAILED:
661      UpdateServiceState(REMOTE_SERVICE_DISABLED,
662                         "Unrecoverable database error");
663      break;
664
665    default:
666      // Other errors don't affect service state
667      break;
668  }
669}
670
671void SyncWorker::UpdateServiceState(RemoteServiceState state,
672                                    const std::string& description) {
673  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
674
675  RemoteServiceState old_state = GetCurrentState();
676  service_state_ = state;
677
678  if (old_state == GetCurrentState())
679    return;
680
681  util::Log(logging::LOG_VERBOSE, FROM_HERE,
682            "Service state changed: %d->%d: %s",
683            old_state, GetCurrentState(), description.c_str());
684
685  FOR_EACH_OBSERVER(
686      Observer, observers_,
687      UpdateServiceState(GetCurrentState(), description));
688}
689
690void SyncWorker::CallOnIdleForTesting(const base::Closure& callback) {
691  if (task_manager_->ScheduleTaskIfIdle(
692          FROM_HERE,
693          base::Bind(&InvokeIdleCallback, callback),
694          base::Bind(&EmptyStatusCallback)))
695    return;
696  call_on_idle_callback_ = base::Bind(
697      &SyncWorker::CallOnIdleForTesting,
698      weak_ptr_factory_.GetWeakPtr(),
699      callback);
700}
701
702drive::DriveServiceInterface* SyncWorker::GetDriveService() {
703  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
704  return context_->GetDriveService();
705}
706
707drive::DriveUploaderInterface* SyncWorker::GetDriveUploader() {
708  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
709  return context_->GetDriveUploader();
710}
711
712MetadataDatabase* SyncWorker::GetMetadataDatabase() {
713  DCHECK(sequence_checker_.CalledOnValidSequencedThread());
714  return context_->GetMetadataDatabase();
715}
716
717}  // namespace drive_backend
718}  // namespace sync_file_system
719