feat: initial github release version checker

frontend/appflowy_flutter/lib/plugins/document/presentation/editor_plugins/actions/option_action.dart

@@ -1,3 +1,5 @@
+import 'package:flutter/material.dart';
+
 import 'package:appflowy/generated/flowy_svgs.g.dart';
 import 'package:appflowy/generated/locale_keys.g.dart';
 import 'package:appflowy/plugins/document/presentation/editor_plugins/plugins.dart';
@@ -7,7 +9,6 @@ import 'package:appflowy_popover/appflowy_popover.dart';
 import 'package:easy_localization/easy_localization.dart';
 import 'package:flowy_infra/theme_extension.dart';
 import 'package:flowy_infra_ui/flowy_infra_ui.dart';
-import 'package:flutter/material.dart';
 import 'package:styled_widget/styled_widget.dart';
 
 const optionActionColorDefaultColor = 'appflowy_theme_default_color';
@@ -142,10 +143,7 @@ enum OptionDepthType {
 class DividerOptionAction extends CustomActionCell {
   @override
   Widget buildWithContext(BuildContext context) {
-    return const Divider(
-      height: 1.0,
-      thickness: 1.0,
-    );
+    return const Divider(height: 1.0, thickness: 1.0);
   }
 }
 

frontend/appflowy_flutter/lib/startup/deps_resolver.dart

@@ -28,6 +28,7 @@ import 'package:appflowy/workspace/application/settings/prelude.dart';
 import 'package:appflowy/workspace/application/sidebar/rename_view/rename_view_bloc.dart';
 import 'package:appflowy/workspace/application/tabs/tabs_bloc.dart';
 import 'package:appflowy/workspace/application/user/prelude.dart';
+import 'package:appflowy/workspace/application/version_checker/version_checker_bloc.dart';
 import 'package:appflowy/workspace/application/view/prelude.dart';
 import 'package:appflowy/workspace/application/workspace/prelude.dart';
 import 'package:appflowy/workspace/presentation/home/menu/menu_shared_state.dart';
@@ -200,6 +201,8 @@ void _resolveHomeDeps(GetIt getIt) {
   getIt.registerSingleton<ReminderBloc>(ReminderBloc());
 
   getIt.registerSingleton<RenameViewBloc>(RenameViewBloc(PopoverController()));
+
+  getIt.registerSingleton<VersionCheckerBloc>(VersionCheckerBloc());
 }
 
 void _resolveFolderDeps(GetIt getIt) {

frontend/appflowy_flutter/lib/startup/startup.dart

@@ -1,12 +1,13 @@
 import 'dart:async';
 import 'dart:io';
 
+import 'package:flutter/foundation.dart';
+import 'package:flutter/material.dart';
+
 import 'package:appflowy/env/cloud_env.dart';
 import 'package:appflowy/startup/tasks/feature_flag_task.dart';
 import 'package:appflowy/workspace/application/settings/prelude.dart';
 import 'package:appflowy_backend/appflowy_backend.dart';
-import 'package:flutter/foundation.dart';
-import 'package:flutter/material.dart';
 import 'package:get_it/get_it.dart';
 import 'package:package_info_plus/package_info_plus.dart';
 

frontend/appflowy_flutter/lib/startup/tasks/app_widget.dart

@@ -11,6 +11,7 @@ import 'package:appflowy/workspace/application/notifications/notification_servic
 import 'package:appflowy/workspace/application/settings/appearance/appearance_cubit.dart';
 import 'package:appflowy/workspace/application/settings/notifications/notification_settings_cubit.dart';
 import 'package:appflowy/workspace/application/sidebar/rename_view/rename_view_bloc.dart';
+import 'package:appflowy/workspace/application/version_checker/version_checker_bloc.dart';
 import 'package:appflowy/workspace/application/view/view_ext.dart';
 import 'package:appflowy_backend/log.dart';
 import 'package:appflowy_backend/protobuf/flowy-user/protobuf.dart';
@@ -136,6 +137,10 @@ class _ApplicationWidgetState extends State<ApplicationWidget> {
   Widget build(BuildContext context) {
     return MultiBlocProvider(
       providers: [
+        BlocProvider<VersionCheckerBloc>.value(
+          value: getIt<VersionCheckerBloc>()
+            ..add(const VersionCheckerEvent.checkLatestRelease()),
+        ),
         BlocProvider<AppearanceSettingsCubit>(
           create: (_) => AppearanceSettingsCubit(
             widget.appearanceSetting,

frontend/appflowy_flutter/lib/user/application/github/github_service.dart

@@ -0,0 +1,94 @@
+// ignore_for_file: invalid_annotation_target
+
+import 'dart:convert';
+
+import 'package:appflowy_backend/log.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:http/http.dart' as http;
+
+part 'github_service.freezed.dart';
+part 'github_service.g.dart';
+
+abstract class IGitHubService {
+  /// Checks for the latest release on GitHub.
+  ///
+  /// Returns [GitHubReleaseInfo] if the request is successful, otherwise returns null.
+  Future<GitHubReleaseInfo?> checkLatestGitHubRelease();
+
+  /// Disposes of any resources used by the service.
+  ///
+  void dispose();
+}
+
+@freezed
+class GitHubReleaseInfo with _$GitHubReleaseInfo {
+  const GitHubReleaseInfo._();
+
+  const factory GitHubReleaseInfo({
+    @JsonKey(name: 'tag_name') required String tagName,
+    required String name,
+    @JsonKey(name: 'body') required String changelog,
+    @JsonKey(name: 'html_url') required String htmlUrl,
+    @JsonKey(name: 'created_at') required String createdAt,
+    @JsonKey(name: 'published_at') required String publishedAt,
+  }) = _GitHubReleaseInfo;
+
+  factory GitHubReleaseInfo.fromJson(Map<String, dynamic> json) =>
+      _$GitHubReleaseInfoFromJson(json);
+}
+
+class GitHubService implements IGitHubService {
+  GitHubService();
+
+  static const String _gitHubVersionHeader = 'X-GitHub-Api-Version';
+  static const String _gitHubVersion = '2022-11-28';
+
+  static const String _baseUrl = 'https://api.github.com';
+  static const String _repo = '/repos/AppFlowy-IO/AppFlowy';
+
+  static const String _latestReleaseEndpoint = '/releases/latest';
+
+  final http.Client _client = http.Client();
+  Uri _uri = Uri.parse(_baseUrl);
+
+  @override
+  Future<GitHubReleaseInfo?> checkLatestGitHubRelease() async {
+    _uri = _uri.replace(path: '$_repo$_latestReleaseEndpoint');
+    try {
+      final response = await _client.get(
+        _uri,
+        headers: {
+          _gitHubVersionHeader: _gitHubVersion,
+        },
+      );
+
+      if (response.statusCode == 200) {
+        final Map<String, dynamic> body =
+            jsonDecode(response.body) as Map<String, dynamic>;
+        return GitHubReleaseInfo.fromJson(body);
+      } else if (response.statusCode == 403) {
+        // For unauthenticated usage, the rate limit is 60 requests per hour.
+        //
+        // https://docs.github.com/en/rest/using-the-rest-api/rate-limits-for-the-rest-api?apiVersion=2022-11-28
+        Log.warn(
+          'checkLatestGitHubRelease failed: GitHub API rate limit exceeded',
+        );
+      }
+    } on http.ClientException catch (e, s) {
+      Log.error(
+        'checkLatestGitHubRelease failed: ${e.message}\n$s',
+      );
+    } on TypeError catch (e) {
+      Log.error(
+        'checkLatestGitHubRelease failed mapping GitHubReleaseInfo\n${e.stackTrace}',
+      );
+    }
+
+    return null;
+  }
+
+  @override
+  void dispose() {
+    _client.close();
+  }
+}

frontend/appflowy_flutter/lib/workspace/application/version_checker/version_checker_bloc.dart

@@ -0,0 +1,74 @@
+import 'package:flutter/foundation.dart';
+
+import 'package:appflowy/user/application/github/github_service.dart';
+import 'package:bloc/bloc.dart';
+import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:package_info_plus/package_info_plus.dart';
+
+part 'version_checker_bloc.freezed.dart';
+
+class VersionCheckerBloc
+    extends Bloc<VersionCheckerEvent, VersionCheckerState> {
+  VersionCheckerBloc() : super(const VersionCheckerState()) {
+    _gitHubService = GitHubService();
+
+    on<VersionCheckerEvent>((event, emit) async {
+      await event.when(
+        checkLatestRelease: () async {
+          final releaseInfo = await _gitHubService.checkLatestGitHubRelease();
+          final currentInfo = await PackageInfo.fromPlatform();
+
+          if (releaseInfo == null) {
+            // We "fail" silently here because we don't want to bother users without network connection
+            return emit(
+              state.copyWith(
+                appName: currentInfo.appName,
+                currentVersion: currentInfo.version,
+                isLoading: false,
+                isUpdateAvailable: false,
+              ),
+            );
+          } else {
+            emit(
+              state.copyWith(
+                appName: currentInfo.appName,
+                currentVersion: currentInfo.version,
+                latestVersion: releaseInfo.tagName,
+                isUpdateAvailable: currentInfo.version != releaseInfo.tagName,
+                isLoading: false,
+                changelog: releaseInfo.changelog,
+                downloadLink: releaseInfo.htmlUrl,
+              ),
+            );
+          }
+        },
+      );
+    });
+  }
+
+  late final IGitHubService _gitHubService;
+
+  @override
+  Future<void> close() async {
+    _gitHubService.dispose();
+    return super.close();
+  }
+}
+
+@freezed
+class VersionCheckerEvent with _$VersionCheckerEvent {
+  const factory VersionCheckerEvent.checkLatestRelease() = _CheckLatestRelease;
+}
+
+@freezed
+class VersionCheckerState with _$VersionCheckerState {
+  const factory VersionCheckerState({
+    @Default(null) String? appName,
+    @Default(null) String? currentVersion,
+    @Default(null) String? latestVersion,
+    @Default(false) bool isUpdateAvailable,
+    @Default(true) bool isLoading,
+    @Default(null) String? changelog,
+    @Default(null) String? downloadLink,
+  }) = _VersionCheckerState;
+}

frontend/appflowy_flutter/lib/workspace/presentation/home/menu/sidebar/workspace/_sidebar_workspace_actions.dart

@@ -1,3 +1,5 @@
+import 'package:flutter/material.dart';
+
 import 'package:appflowy/generated/flowy_svgs.g.dart';
 import 'package:appflowy/generated/locale_keys.g.dart';
 import 'package:appflowy/workspace/application/user/user_workspace_bloc.dart';
@@ -7,7 +9,6 @@ import 'package:appflowy_backend/protobuf/flowy-user/protobuf.dart';
 import 'package:appflowy_popover/appflowy_popover.dart';
 import 'package:easy_localization/easy_localization.dart';
 import 'package:flowy_infra_ui/flowy_infra_ui.dart';
-import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 
 enum WorkspaceMoreAction {