fix(firebase_ui_auth): actionsBeforeDelete callback

packages/firebase_ui_auth/lib/src/screens/profile_screen.dart

@@ -716,6 +716,9 @@ class ProfileScreen extends MultiProviderScreen {
   /// ```
   final List<FirebaseUIAction>? actions;
 
+  // Any actions that should be performed before the account is deleted.
+  final ActionsBeforeDeleteCallback? actionsBeforeDelete;
+
   /// See [Scaffold.appBar].
   final AppBar? appBar;
 
@@ -751,6 +754,7 @@ class ProfileScreen extends MultiProviderScreen {
     this.avatarSize,
     this.children = const [],
     this.actions,
+    this.actionsBeforeDelete,
     this.appBar,
     this.cupertinoNavigationBar,
     this.actionCodeSettings,
@@ -917,6 +921,7 @@ class ProfileScreen extends MultiProviderScreen {
         const SizedBox(height: 8),
         DeleteAccountButton(
           auth: auth,
+          actionsBeforeDelete: actionsBeforeDelete,
           showDeleteConfirmationDialog: showDeleteConfirmationDialog,
           onSignInRequired: () {
             return _reauthenticate(context);

packages/firebase_ui_auth/lib/src/widgets/delete_account_button.dart

@@ -11,6 +11,7 @@ import 'package:flutter/material.dart';
 
 typedef DeleteFailedCallback = void Function(Exception exception);
 typedef SignInRequiredCallback = Future<bool> Function();
+typedef ActionsBeforeDeleteCallback = Future<bool> Function();
 
 /// {@template ui.auth.widgets.delete_account_button}
 /// A button that triggers the deletion of the user's account.
@@ -55,6 +56,9 @@ class DeleteAccountButton extends StatefulWidget {
   /// A callback that is called if the account deletion fails.
   final DeleteFailedCallback? onDeleteFailed;
 
+  /// A callback that is called before the account is deleted.
+  final ActionsBeforeDeleteCallback? actionsBeforeDelete;
+
   /// {@macro ui.shared.widgets.button_variant}
   final ButtonVariant variant;
 
@@ -69,6 +73,7 @@ class DeleteAccountButton extends StatefulWidget {
     this.auth,
     this.onSignInRequired,
     this.onDeleteFailed,
+    this.actionsBeforeDelete,
     this.variant = ButtonVariant.filled,
     this.showDeleteConfirmationDialog = false,
   });
@@ -112,6 +117,13 @@ class _DeleteAccountButtonState extends State<DeleteAccountButton> {
     });
 
     try {
+      if (widget.actionsBeforeDelete != null) {
+        final proceed = await widget.actionsBeforeDelete!();
+        if (!proceed) {
+          throw Exception('Can not complete actions before delete.');
+        }
+      }
+
       final user = auth.currentUser!;
       await auth.currentUser?.delete();