addressing comments (#23692)

learning/tour-of-beam/frontend/README.md

@@ -36,7 +36,7 @@ However, after changes you may need to re-run code generation:
 cd beam
 ./gradlew :playground:frontend:playground_components:generateCode
 cd learning/tour-of-beam/frontend
-flutter pub run build_runner build
+flutter pub run build_runner build --delete-conflicting-outputs
 ```
 
 ### Run

learning/tour-of-beam/frontend/lib/auth/notifier.dart

@@ -19,15 +19,10 @@
 import 'dart:async';
 
 import 'package:firebase_auth/firebase_auth.dart';
+import 'package:firebase_auth_platform_interface/firebase_auth_platform_interface.dart';
 import 'package:flutter/material.dart';
-import 'method.dart';
 
 class AuthNotifier extends ChangeNotifier {
-  final _authProviders = UnmodifiableAuthMethodMap(
-    google: GoogleAuthProvider(),
-    github: GithubAuthProvider(),
-  );
-
   AuthNotifier() {
     FirebaseAuth.instance.authStateChanges().listen((user) {
       notifyListeners();
@@ -40,8 +35,8 @@ class AuthNotifier extends ChangeNotifier {
     return await FirebaseAuth.instance.currentUser?.getIdToken();
   }
 
-  Future<void> logIn(AuthMethod authMethod) async {
-    await FirebaseAuth.instance.signInWithPopup(_authProviders.get(authMethod));
+  Future<void> logIn(AuthProvider authProvider) async {
+    await FirebaseAuth.instance.signInWithPopup(authProvider);
   }
 
   Future<void> logOut() async {

learning/tour-of-beam/frontend/lib/cache/cache.dart

@@ -20,6 +20,7 @@ import 'package:flutter/material.dart';
 
 import '../repositories/client/client.dart';
 
+/// A base class for caching entities from network requests.
 abstract class Cache extends ChangeNotifier {
   final TobClient client;
 

learning/tour-of-beam/frontend/lib/cache/content_tree.dart

@@ -30,8 +30,7 @@ class ContentTreeCache extends Cache {
   final _futuresBySdkId = <String, Future<ContentTreeModel>>{};
 
   ContentTreeModel? getContentTree(String sdkId) {
-    final future = _futuresBySdkId[sdkId];
-    if (future == null) {
+    if (_futuresBySdkId.containsKey(sdkId)) {
       unawaited(_loadContentTree(sdkId));
     }
 

learning/tour-of-beam/frontend/lib/components/login/content.dart

@@ -17,13 +17,13 @@
  */
 
 import 'package:easy_localization/easy_localization.dart';
+import 'package:firebase_auth_platform_interface/firebase_auth_platform_interface.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_svg/svg.dart';
 import 'package:get_it/get_it.dart';
 import 'package:playground_components/playground_components.dart';
 
 import '../../assets/assets.gen.dart';
-import '../../auth/method.dart';
 import '../../auth/notifier.dart';
 import '../../constants/sizes.dart';
 
@@ -132,7 +132,7 @@ class _BrandedLoginButtons extends StatelessWidget {
         const SizedBox(height: BeamSizes.size16),
         ElevatedButton.icon(
           onPressed: () async {
-            await authNotifier.logIn(AuthMethod.google);
+            await authNotifier.logIn(GoogleAuthProvider());
             onLoggedIn();
           },
           style: isLightTheme ? googleLightButtonStyle : darkButtonStyle,

learning/tour-of-beam/frontend/pubspec.lock

@@ -14,7 +14,7 @@ packages:
       name: _flutterfire_internals
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.9"
+    version: "1.0.12"
   aligned_dialog:
     dependency: transitive
     description:
@@ -35,7 +35,7 @@ packages:
       name: app_state
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.8.1"
+    version: "0.8.4"
   archive:
     dependency: transitive
     description:
@@ -155,20 +155,6 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.1"
-  cloud_firestore_platform_interface:
-    dependency: transitive
-    description:
-      name: cloud_firestore_platform_interface
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "5.9.0"
-  cloud_firestore_web:
-    dependency: transitive
-    description:
-      name: cloud_firestore_web
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "3.1.0"
   code_builder:
     dependency: transitive
     description:
@@ -254,19 +240,12 @@ packages:
     source: hosted
     version: "0.0.2"
   enum_map:
-    dependency: "direct main"
+    dependency: transitive
     description:
       name: enum_map
       url: "https://pub.dartlang.org"
     source: hosted
     version: "0.2.1"
-  enum_map_gen:
-    dependency: "direct dev"
-    description:
-      name: enum_map_gen
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "0.2.0"
   equatable:
     dependency: "direct dev"
     description:
@@ -303,12 +282,12 @@ packages:
     source: hosted
     version: "4.1.4"
   firebase_auth_platform_interface:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: firebase_auth_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "6.11.3"
+    version: "6.11.7"
   firebase_auth_web:
     dependency: transitive
     description:
@@ -322,7 +301,7 @@ packages:
       name: firebase_core
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.3.0"
+    version: "2.4.1"
   firebase_core_platform_interface:
     dependency: transitive
     description:
@@ -336,7 +315,7 @@ packages:
       name: firebase_core_web
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.1"
+    version: "2.1.0"
   fixnum:
     dependency: transitive
     description:
@@ -355,7 +334,7 @@ packages:
       name: flutter_code_editor
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.1"
+    version: "0.2.5"
   flutter_driver:
     dependency: transitive
     description: flutter

learning/tour-of-beam/frontend/pubspec.yaml

@@ -32,8 +32,8 @@ dependencies:
   easy_localization: ^3.0.1
   easy_localization_ext: ^0.1.0
   easy_localization_loader: ^1.0.0
-  enum_map: ^0.2.1
   firebase_auth: ^4.1.1
+  firebase_auth_platform_interface: ^6.11.7
   firebase_core: ^2.1.1
   flutter: { sdk: flutter }
   flutter_markdown: ^0.6.12
@@ -52,7 +52,6 @@ dependencies:
 
 dev_dependencies:
   build_runner: ^2.2.0
-  enum_map_gen: ^0.2.0
   equatable: ^2.0.5
   flutter_gen_runner: ^4.3.0
   flutter_test: { sdk: flutter }

learning/tour-of-beam/frontend/test/main_test.dart

@@ -17,5 +17,5 @@
  */
 
 void main() {
-  // TODO(nausharipov): add unit and integration tests
+  // TODO(nausharipov): add unit and integration tests: // https://github.com/apache/beam/issues/24982
 }