chrome/browser/sync/backup_rollback_controller.cc

   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/backup_rollback_controller.h"
   6
   7 #include "base/command_line.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "chrome/browser/sync/managed_user_signin_manager_wrapper.h"
  10 #include "chrome/common/chrome_switches.h"
  11 #include "components/sync_driver/sync_prefs.h"
  12
  13 namespace browser_sync {
  14
  15 #if defined(OS_WIN) || defined(OS_MACOSX) || (defined(OS_LINUX) && !defined(OS_CHROMEOS))
  16 // Number of rollback attempts to try before giving up.
  17 static const int kRollbackLimits = 3;
  18 #endif
  19
  20 BackupRollbackController::BackupRollbackController(
  21     sync_driver::SyncPrefs* sync_prefs,
  22     const ManagedUserSigninManagerWrapper* signin,
  23     base::Closure start_backup,
  24     base::Closure start_rollback)
  25     : sync_prefs_(sync_prefs),
  26       signin_(signin),
  27       start_backup_(start_backup),
  28       start_rollback_(start_rollback),
  29       weak_ptr_factory_(this) {
  30 }
  31
  32 BackupRollbackController::~BackupRollbackController() {
  33 }
  34
  35 void BackupRollbackController::Start(base::TimeDelta delay) {
  36 #if defined(OS_WIN) || defined(OS_MACOSX) || (defined(OS_LINUX) && !defined(OS_CHROMEOS))
  37   if (!CommandLine::ForCurrentProcess()->HasSwitch(
  38       switches::kSyncEnableBackupRollback)) {
  39     return;
  40   }
  41
  42   if (delay == base::TimeDelta()) {
  43     TryStart();
  44   } else {
  45     base::MessageLoop::current()->PostDelayedTask(
  46         FROM_HERE,
  47         base::Bind(&BackupRollbackController::TryStart,
  48                    weak_ptr_factory_.GetWeakPtr()),
  49         delay);
  50   }
  51 #endif
  52 }
  53
  54 void BackupRollbackController::OnRollbackReceived() {
  55 #if defined(OS_WIN) || defined(OS_MACOSX) || (defined(OS_LINUX) && !defined(OS_CHROMEOS))
  56   sync_prefs_->SetRemainingRollbackTries(kRollbackLimits);
  57 #endif
  58 }
  59
  60 void BackupRollbackController::OnRollbackDone() {
  61 #if defined(OS_WIN) || defined(OS_MACOSX) || (defined(OS_LINUX) && !defined(OS_CHROMEOS))
  62   sync_prefs_->SetRemainingRollbackTries(0);
  63 #endif
  64 }
  65
  66 void BackupRollbackController::TryStart() {
  67   if (!signin_->GetEffectiveUsername().empty()) {
  68     DVLOG(1) << "Don't start backup/rollback when user is signed in.";
  69     return;
  70   }
  71
  72   int rollback_tries = sync_prefs_->GetRemainingRollbackTries();
  73   if (rollback_tries > 0) {
  74     DVLOG(1) << "Start rollback.";
  75     sync_prefs_->SetRemainingRollbackTries(rollback_tries - 1);
  76     start_rollback_.Run();
  77   } else {
  78     DVLOG(1) << "Start backup.";
  79     start_backup_.Run();
  80   }
  81 }
  82
  83 }  // namespace browser_sync