Show activity indicator during profile update; trim whitespace from profile names.

// FREEBIE

Signal/src/ViewControllers/ProfileViewController.m

@@ -223,22 +223,40 @@ NS_ASSUME_NONNULL_BEGIN
 - (void)updateProfile
 {
     __weak ProfileViewController *weakSelf = self;
-    [OWSProfileManager.sharedManager updateLocalProfileName:self.nameTextField.text
-        avatarImage:self.avatar
-        success:^{
-            [weakSelf.navigationController popViewControllerAnimated:YES];
-        }
-        failure:^{
-            [OWSAlerts showAlertWithTitle:NSLocalizedString(@"ALERT_ERROR_TITLE", @"")
-                                  message:NSLocalizedString(@"PROFILE_VIEW_ERROR_UPDATE_FAILED",
-                                              @"Error message shown when a profile update fails.")];
-        }];
+
+    // Show an activity indicator to block the UI during the profile upload.
+    UIAlertController *alertController =
+        [UIAlertController alertControllerWithTitle:NSLocalizedString(@"PROFILE_VIEW_SAVING",
+                                                        @"Indicates that the user's profile view is being saved.")
+                                            message:nil
+                                     preferredStyle:UIAlertControllerStyleAlert];
+
+    [self presentViewController:alertController
+                       animated:YES
+                     completion:^{
+                         [alertController dismissViewControllerAnimated:NO completion:nil];
+
+                         [OWSProfileManager.sharedManager updateLocalProfileName:[self normalizedProfileName]
+                             avatarImage:self.avatar
+                             success:^{
+                                 [weakSelf.navigationController popViewControllerAnimated:YES];
+                             }
+                             failure:^{
+                                 [OWSAlerts
+                                     showAlertWithTitle:NSLocalizedString(@"ALERT_ERROR_TITLE", @"")
+                                                message:NSLocalizedString(@"PROFILE_VIEW_ERROR_UPDATE_FAILED",
+                                                            @"Error message shown when a profile update fails.")];
+                             }];
+                     }];
+}
+
+- (NSString *)normalizedProfileName
+{
+    return [self.nameTextField.text stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
 }
 
 #pragma mark - UITextFieldDelegate
 
-// TODO: This logic resides in both RegistrationViewController and here.
-//       We should refactor it out into a utility function.
 - (BOOL)textField:(UITextField *)textField
     shouldChangeCharactersInRange:(NSRange)range
                 replacementString:(NSString *)insertionText

Signal/translations/en.lproj/Localizable.strings

@@ -1081,6 +1081,9 @@
 /* Label for the profile name field of the profile view. */
 "PROFILE_VIEW_NAME_SECTION_HEADER" = "Profile Name";
 
+/* Indicates that the user's profile view is being saved. */
+"PROFILE_VIEW_SAVING" = "Saving...";
+
 /* Title for the profile view. */
 "PROFILE_VIEW_TITLE" = "Profile";