Load server configuration

moneymgr_mobile/lib/providers/auth_state.dart

@@ -1,6 +1,7 @@
 import 'package:moneymgr_mobile/services/api/api_client.dart';
 import 'package:moneymgr_mobile/services/api/api_token.dart';
 import 'package:moneymgr_mobile/services/api/auth_api.dart';
+import 'package:moneymgr_mobile/services/storage/prefs.dart';
 import 'package:moneymgr_mobile/services/storage/secure_storage.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 
@@ -25,7 +26,10 @@ class CurrentAuthState extends _$CurrentAuthState {
   /// Will invalidate the state if success and throw an exception in case of failure
   Future<void> setAuthToken(ApiToken token) async {
     // Attempt to use provided token
-    await ApiClient(token: token).authInfo();
+    await ApiClient(
+      token: token,
+      prefs: await ref.watch(prefsProvider.future),
+    ).authInfo();
 
     final secureStorage = ref.read(secureStorageProvider).requireValue;
     await secureStorage.setToken(token);
@@ -37,19 +41,13 @@ class CurrentAuthState extends _$CurrentAuthState {
 
   /// Logs out, deletes the saved token and profile info from storage, and invalidates
   /// the state.
-  void logout() {
+  Future<void> logout() async {
-    // TODO : implement logic
+    final secureStorage = ref.read(secureStorageProvider).requireValue;
-    /*final secureStorage = ref.read(secureStorageProvider).requireValue;
+    await secureStorage.removeToken();
-
-    // Delete the current [token] and [profile] from secure storage.
-    secureStorage.remove('token');
 
     ref
-    // Invalidate the state so the auth state will be updated to unauthenticated.
+    // Invalidate the state so the auth state will be updated to authenticated.
-      ..invalidateSelf()
+        .invalidateSelf();
-    // Invalidate the token provider so the API service will no longer use the
-    // previous token.
-      ..invalidate(tokenProvider);*/
   }
 }
 

moneymgr_mobile/lib/routes/profile/profile_screen.dart

@@ -0,0 +1,14 @@
+import 'package:flutter/material.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:moneymgr_mobile/services/storage/prefs.dart';
+
+class ProfileScreen extends HookConsumerWidget {
+  const ProfileScreen({super.key});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final data = ref.watch(prefsProvider);
+    if (data.value == null) return CircularProgressIndicator();
+    return Text("dd\n\n\n${data.value!.serverConfig()}");
+  }
+}

moneymgr_mobile/lib/services/api/api_client.dart

@@ -2,8 +2,11 @@ import 'package:dart_jsonwebtoken/dart_jsonwebtoken.dart';
 import 'package:dio/dio.dart';
 import 'package:hooks_riverpod/hooks_riverpod.dart';
 import 'package:moneymgr_mobile/services/api/api_token.dart';
+import 'package:moneymgr_mobile/services/storage/prefs.dart';
+import 'package:moneymgr_mobile/services/storage/secure_storage.dart';
 import 'package:moneymgr_mobile/utils/string_utils.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
+import 'package:shared_preferences/shared_preferences.dart';
 
 part 'api_client.g.dart';
 
@@ -14,8 +17,9 @@ const apiTokenHeader = "X-Auth-Token";
 class ApiClient {
   final ApiToken token;
   final Dio client;
+  final SharedPreferencesWithCache prefs;
 
-  ApiClient({required this.token})
+  ApiClient({required this.token, required this.prefs})
     : client = Dio(BaseOptions(baseUrl: token.apiUrl));
 
   /// Get Dio instance
@@ -54,19 +58,14 @@ class ApiClient {
 /// The API client is kept alive to follow dio's recommendation to use the same
 /// client instance for the entire app.
 @riverpod
-ApiClient apiService(Ref ref) {
+ApiClient? apiService(Ref ref) {
-  /*final token = ref.watch(currentAuthStateProvider);
+  final storage = ref.watch(secureStorageProvider);
+  final prefs = ref.watch(prefsProvider);
 
-  final ApiClient client;
+  final t = storage.value?.token();
+  if (t == null || prefs.value == null) return null;
 
-  const mock = bool.fromEnvironment('MOCK_API', defaultValue: false);
-  client = switch (mock) {
-    true =>
-    token != null ? MockedApiClient.withToken(token) : MockedApiClient(),
-    false => token != null ? ApiClient.withToken(token) : ApiClient(),
-  };
   ref.keepAlive();
 
-  return client;*/
+  return ApiClient(token: t, prefs: prefs.value!);
-  throw Exception("TODO"); // TODO
 }

moneymgr_mobile/lib/services/api/server_api.dart

@@ -0,0 +1,72 @@
+// ignore_for_file: non_constant_identifier_names
+
+import 'package:freezed_annotation/freezed_annotation.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:logging/logging.dart';
+import 'package:moneymgr_mobile/services/storage/prefs.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+import 'api_client.dart';
+
+part 'server_api.freezed.dart';
+part 'server_api.g.dart';
+
+@freezed
+abstract class ServerConstraint with _$ServerConstraint {
+  const factory ServerConstraint({required int min, required int max}) =
+      _ServerConstraint;
+
+  factory ServerConstraint.fromJson(Map<String, dynamic> json) =>
+      _$ServerConstraintFromJson(json);
+}
+
+@freezed
+abstract class ServerConstraints with _$ServerConstraints {
+  const factory ServerConstraints({required ServerConstraint inbox_entry_label}) =
+  _ServerConstraints;
+
+  factory ServerConstraints.fromJson(Map<String, dynamic> json) =>
+      _$ServerConstraintsFromJson(json);
+}
+
+@freezed
+abstract class ServerConfig with _$ServerConfig {
+  const factory ServerConfig({required ServerConstraints constraints}) =
+      _ServerConfig;
+
+  factory ServerConfig.fromJson(Map<String, dynamic> json) =>
+      _$ServerConfigFromJson(json);
+}
+
+/// Auth API
+extension ServerApi on ApiClient {
+  /// Get authentication information from server
+  Future<ServerConfig> serverConfig() async {
+    final response = await execute("/server/config", method: "GET");
+    return ServerConfig.fromJson(response.data);
+  }
+
+
+}
+
+/// Get authentication information from server, or retrieve cached information (if available, in
+/// case of failure)
+@riverpod
+Future<ServerConfig> serverConfigOrCache(Ref ref) async {
+  final client = ref.watch(apiServiceProvider)!;
+  try {
+    final config = await client.serverConfig();
+    client.prefs.setServerConfig(config);
+    return config;
+  } catch (e, s) {
+    Logger.root.warning("Failed to fetch server configuration! $e $s");
+  }
+
+  final cached = client.prefs.serverConfig();
+  if (cached == null) {
+    throw Exception(
+      "Could not fetch server configuration, cached version is unavailable!",
+    );
+  }
+  return cached;
+}

moneymgr_mobile/lib/services/router/router.dart

@@ -5,8 +5,10 @@ import 'package:moneymgr_mobile/providers/auth_state.dart';
 import 'package:moneymgr_mobile/routes/login/login_screen.dart';
 import 'package:moneymgr_mobile/routes/login/manual_auth_screen.dart';
 import 'package:moneymgr_mobile/routes/login/qr_auth_screen.dart';
+import 'package:moneymgr_mobile/routes/profile/profile_screen.dart';
 import 'package:moneymgr_mobile/routes/settings/settings_screen.dart';
 import 'package:moneymgr_mobile/services/router/routes_list.dart';
+import 'package:moneymgr_mobile/widgets/loaders/load_server_config.dart';
 import 'package:moneymgr_mobile/widgets/scaffold_with_navigation.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 
@@ -49,7 +51,7 @@ GoRouter router(Ref ref) {
     ),
     NavigationItem(
       path: profilePage,
-      body: (_) => const Text("Profile"),
+      body: (_) => ProfileScreen(),
       icon: Icons.person_outline,
       selectedIcon: Icons.person,
       label: 'Profile',
@@ -79,10 +81,12 @@ GoRouter router(Ref ref) {
             GoRoute(
               path: item.path,
               pageBuilder: (context, _) => NoTransitionPage(
-                child: ScaffoldWithNavigation(
+                child: LoadServerConfig(
-                  selectedIndex: index,
+                  child: ScaffoldWithNavigation(
-                  navigationItems: navigationItems,
+                    selectedIndex: index,
-                  child: item.body(context),
+                    navigationItems: navigationItems,
+                    child: item.body(context),
+                  ),
                 ),
               ),
               routes: item.routes,

moneymgr_mobile/lib/services/storage/prefs.dart

@@ -1,4 +1,7 @@
+import 'dart:convert';
+
 import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:moneymgr_mobile/services/api/server_api.dart';
 import 'package:riverpod_annotation/riverpod_annotation.dart';
 import 'package:shared_preferences/shared_preferences.dart';
 
@@ -9,3 +12,19 @@ Future<SharedPreferencesWithCache> prefs(Ref ref) =>
     SharedPreferencesWithCache.create(
       cacheOptions: const SharedPreferencesWithCacheOptions(),
     );
+
+extension MoneyMgrSharedPreferences on SharedPreferencesWithCache {
+  ServerConfig? serverConfig() {
+    final json = getString("serverConfig");
+    if (json != null) return ServerConfig.fromJson(jsonDecode(json));
+    return null;
+  }
+
+  Future<void> setServerConfig(ServerConfig config) async {
+    await setString("serverConfig", jsonEncode(config));
+  }
+
+  Future<void> clearServerConfig() async {
+    await remove("serverConfig");
+  }
+}

moneymgr_mobile/lib/widgets/full_screen_error.dart

@@ -0,0 +1,49 @@
+import 'package:flutter/material.dart';
+
+class FullScreenError extends StatelessWidget {
+  final String message;
+  final String error;
+  final List<Widget>? actions;
+
+  const FullScreenError({
+    super.key,
+    required this.message,
+    required this.error,
+    this.actions,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: Text("Error")),
+      body: Padding(
+        padding: const EdgeInsets.all(8.0),
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            Card(
+              elevation: 2,
+              color: Colors.red,
+              child: Padding(
+                padding: const EdgeInsets.all(8.0),
+                child: Column(
+                  children: [
+                    Text(
+                      message,
+                      style: TextStyle(color: Colors.white, fontSize: 20),
+                    ),
+                    Text(error, style: TextStyle(color: Colors.white)),
+                  ],
+                ),
+              ),
+            ),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: actions ?? [],
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

moneymgr_mobile/lib/widgets/loaders/load_server_config.dart

@@ -0,0 +1,35 @@
+import 'package:flutter/material.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+import 'package:moneymgr_mobile/providers/auth_state.dart';
+import 'package:moneymgr_mobile/services/api/server_api.dart';
+import 'package:moneymgr_mobile/widgets/full_screen_error.dart';
+
+class LoadServerConfig extends HookConsumerWidget {
+  final Widget child;
+
+  const LoadServerConfig({super.key, required this.child});
+
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final serverConfig = ref.watch(serverConfigOrCacheProvider);
+
+    handleSignOut() {
+      ref.watch(currentAuthStateProvider.notifier).logout();
+    }
+
+    return switch (serverConfig) {
+      AsyncData() => child,
+      AsyncError(:final error) => FullScreenError(
+        message: "Failed to load server configuration!",
+        error: error.toString(),
+        actions: [
+          MaterialButton(
+            onPressed: handleSignOut,
+            child: Text("Sign out".toUpperCase()),
+          ),
+        ],
+      ),
+      _ => const Scaffold(body: Center(child: CircularProgressIndicator())),
+    };
+  }
+}