[WIP] Match TOTP modal to SMS/Voice modal

lib/controllers/user_provider.dart

@@ -84,16 +84,6 @@ class UserProvider extends ChangeNotifier {
     notifyListeners();
   }
 
-  void login() async {
-    await auth0Web.loginWithRedirect(redirectUrl: redirectUri);
-  }
-
-  Future<bool> isLoggedIn() async =>
-      await auth0Web.hasValidCredentials();
-
-  Future<Credentials> currentCredentials() async =>
-      await auth0Web.credentials();
-
   Future<void> logout() => auth0Web.logout(
       federated: false,
       returnToUrl: 'https://sandbox.account.lacity.gov/'

lib/utils/BaseMFADialogState.dart

@@ -0,0 +1,70 @@
+import 'package:flutter/material.dart';
+
+import 'constants.dart';
+
+abstract class BaseDialogState<T extends StatefulWidget> extends State<T> {
+
+  List<Widget> get dialogNext => [];
+  Widget get dialogBody;
+  int pageIndex = 0;
+  String errMsg = '';
+  bool obscurePassword = true;
+  late bool _isSmallScreen;
+
+  Widget get dialogClose => IconButton(
+    alignment: Alignment.centerLeft,
+    onPressed: () {
+      Navigator.pop(context);
+    },
+    icon: const Icon(Icons.close),
+  );
+
+  Widget get dialogBack => TextButton(
+    onPressed: () {
+      setState(() {
+        pageIndex -= 1;
+      });
+    },
+    child: const Text('Back'),
+  );
+
+  void navigateToNextPage() {
+    if (pageIndex <= 2) {
+      setState(() {
+        pageIndex += 1;
+      });
+    } else {
+      Navigator.pop(context);
+    }
+  }
+
+  Widget modalBody(final Widget body) => Column(
+    mainAxisSize: MainAxisSize.min,
+    crossAxisAlignment: CrossAxisAlignment.start,
+    children: [
+      dialogClose,
+      _isSmallScreen ? Expanded(child: body) : body,
+      if (_isSmallScreen)
+        Row(
+          mainAxisAlignment: MainAxisAlignment.end,
+          children: pageIndex == 0 ? [dialogNext[pageIndex]] : [dialogBack, dialogNext[pageIndex]],
+        ),
+    ],
+  );
+
+  @override
+  Widget build(final BuildContext context) {
+    final double screenWidth = MediaQuery.of(context).size.width;
+    final bool isSmallScreen = screenWidth < smallScreen;
+
+    _isSmallScreen = isSmallScreen;
+
+    return isSmallScreen
+        ? Dialog.fullscreen(child: dialogBody)
+        : AlertDialog(
+      content: dialogBody,
+      actionsAlignment: MainAxisAlignment.end,
+      actions: pageIndex == 0 ? [dialogNext[pageIndex]] : [dialogBack, dialogNext[pageIndex]],
+    );
+  }
+}