Show 'restore backup' view after registration.

Signal/src/ViewControllers/ProfileViewController.m

@@ -432,6 +432,10 @@ NSString *const kProfileView_LastPresentedDate = @"kProfileView_LastPresentedDat
             [self.navigationController popViewControllerAnimated:YES];
             break;
         case ProfileViewMode_Registration:
+            if (![TSAccountManager sharedInstance].isReregistering) {
+                [self checkCanImportBackup];
+                return;
+            }
             [self showHomeView];
             break;
         case ProfileViewMode_UpgradeOrNag:
@@ -450,6 +454,53 @@ NSString *const kProfileView_LastPresentedDate = @"kProfileView_LastPresentedDat
     OWSAssertDebug([navigationController.topViewController isKindOfClass:[HomeViewController class]]);
 }
 
+- (void)showBackupRestoreView
+{
+    HomeViewController *homeView = [HomeViewController new];
+    SignalsNavigationController *navigationController =
+        [[SignalsNavigationController alloc] initWithRootViewController:homeView];
+    AppDelegate *appDelegate = (AppDelegate *)[UIApplication sharedApplication].delegate;
+    appDelegate.window.rootViewController = navigationController;
+    OWSAssertDebug([navigationController.topViewController isKindOfClass:[HomeViewController class]]);
+}
+
+- (void)checkCanImportBackup
+{
+    [OWSBackup.sharedManager
+        checkCanImportBackup:^(BOOL value) {
+            OWSLogInfo(@"has backup available for import? %d", value);
+
+            if (value) {
+                [self showBackupRestoreView];
+            } else {
+                [self showHomeView];
+            }
+        }
+        failure:^(NSError *error) {
+            UIAlertController *controller = [UIAlertController
+                alertControllerWithTitle:
+                    NSLocalizedString(@"CHECK_FOR_BACKUP_FAILED_TITLE",
+                        @"Title for alert shown when the app failed to check for an existing backup.")
+                                 message:NSLocalizedString(@"CHECK_FOR_BACKUP_FAILED_MESSAGE",
+                                             @"Message for alert shown when the app failed to check for an existing "
+                                             @"backup.")
+                          preferredStyle:UIAlertControllerStyleAlert];
+            [controller addAction:[UIAlertAction actionWithTitle:NSLocalizedString(@"REGISTER_FAILED_TRY_AGAIN", nil)
+                                                           style:UIAlertActionStyleDefault
+                                                         handler:^(UIAlertAction *action) {
+                                                             [self checkCanImportBackup];
+                                                         }]];
+            [controller
+                addAction:[UIAlertAction actionWithTitle:NSLocalizedString(@"CHECK_FOR_BACKUP_DO_NOT_RESTORE",
+                                                             @"The label for the 'do not restore backup' button.")
+                                                   style:UIAlertActionStyleDestructive
+                                                 handler:^(UIAlertAction *action) {
+                                                     [self showHomeView];
+                                                 }]];
+            [self presentViewController:controller animated:YES completion:nil];
+        }];
+}
+
 #pragma mark - UITextFieldDelegate
 
 - (BOOL)textField:(UITextField *)textField

Signal/translations/en.lproj/Localizable.strings

@@ -383,6 +383,15 @@
 /* Title for the 'censorship circumvention country' view. */
 "CENSORSHIP_CIRCUMVENTION_COUNTRY_VIEW_TITLE" = "Select Country";
 
+/* The label for the 'do not restore backup' button. */
+"CHECK_FOR_BACKUP_DO_NOT_RESTORE" = "Do Not Restore";
+
+/* Message for alert shown when the app failed to check for an existing backup. */
+"CHECK_FOR_BACKUP_FAILED_MESSAGE" = "Could not determine whether there is a backup that can be restored.";
+
+/* Title for alert shown when the app failed to check for an existing backup. */
+"CHECK_FOR_BACKUP_FAILED_TITLE" = "Error";
+
 /* Error indicating that the app could not determine that user's CloudKit account status */
 "CLOUDKIT_STATUS_COULD_NOT_DETERMINE" = "There was an error communicating with iCloud for backups.";
 
@@ -1511,8 +1520,8 @@
 /* Label for 'Work FAX' phone numbers. */
 "PHONE_NUMBER_TYPE_WORK_FAX" = "Work Fax";
 
-/* navbar title when viewing the default photo album, which includes all photos */
-"PHOTO_PICKER_DEFAULT_ALBUM" = "All Photos";
+/* label for system photo collections which have no name. */
+"PHOTO_PICKER_UNNAMED_COLLECTION" = "PHOTO_PICKER_UNNAMED_COLLECTION";
 
 /* Accessibility label for button to start media playback */
 "PLAY_BUTTON_ACCESSABILITY_LABEL" = "Play Media";