Better client/login/authState handling

2024-06-02 17:09:57 +02:00 · 2024-06-02 17:09:57 +02:00 · ac299ec7ba
commit ac299ec7ba
parent ec506a7f9e
17 changed files with 496 additions and 401 deletions
--- a/flutter/lib/api/api_client.dart
+++ b/flutter/lib/api/api_client.dart
@ -1,18 +1,19 @@
 import 'dart:convert';

-import 'package:flutter/material.dart';
 import 'package:http/http.dart' as http;
+import 'package:simplecloudnotifier/api/api_exception.dart';
 import 'package:simplecloudnotifier/models/api_error.dart';
 import 'package:simplecloudnotifier/models/client.dart';
-import 'package:simplecloudnotifier/models/key_token_auth.dart';
 import 'package:simplecloudnotifier/models/keytoken.dart';
 import 'package:simplecloudnotifier/models/subscription.dart';
 import 'package:simplecloudnotifier/models/user.dart';
+import 'package:simplecloudnotifier/state/app_auth.dart';
 import 'package:simplecloudnotifier/state/application_log.dart';
 import 'package:simplecloudnotifier/state/globals.dart';
 import 'package:simplecloudnotifier/state/request_log.dart';
 import 'package:simplecloudnotifier/models/channel.dart';
 import 'package:simplecloudnotifier/models/message.dart';
+import 'package:simplecloudnotifier/state/token_source.dart';
 import 'package:simplecloudnotifier/utils/toaster.dart';

 enum ChannelSelector {
@ -84,7 +85,7 @@ class APIClient {

        RequestLog.addRequestAPIError(name, t0, method, uri, req.body, req.headers, responseStatusCode, responseBody, responseHeaders, apierr);
        Toaster.error("Error", 'Request "${name}" failed');
-        throw Exception(apierr.message);
+        throw APIException(responseStatusCode, apierr.error, apierr.errhighlight, apierr.message);
      } catch (exc, trace) {
        ApplicationLog.warn('Failed to decode api response as error-object', additional: exc.toString() + "\nBody:\n" + responseBody, trace: trace);
      }
@ -117,21 +118,21 @@ class APIClient {

  // ==========================================================================================================================================================

-  static Future<User> getUser(KeyTokenAuth auth, String uid) async {
+  static Future<User> getUser(TokenSource auth, String uid) async {
    return await _request(
      name: 'getUser',
      method: 'GET',
      relURL: 'users/$uid',
      fn: User.fromJson,
-      authToken: auth.tokenAdmin,
+      authToken: auth.getToken(),
    );
  }

-  static Future<Client> addClient(KeyTokenAuth? auth, String fcmToken, String agentModel, String agentVersion, String? name, String clientType) async {
+  static Future<Client> addClient(TokenSource auth, String fcmToken, String agentModel, String agentVersion, String? name, String clientType) async {
    return await _request(
      name: 'addClient',
      method: 'POST',
-      relURL: 'users/${auth!.userId}/clients',
+      relURL: 'users/${auth.getUserID()}/clients',
      jsonBody: {
        'fcm_token': fcmToken,
        'agent_model': agentModel,
@ -140,15 +141,15 @@ class APIClient {
        'name': name,
      },
      fn: Client.fromJson,
-      authToken: auth.tokenAdmin,
+      authToken: auth.getToken(),
    );
  }

-  static Future<Client> updateClient(KeyTokenAuth? auth, String clientID, String fcmToken, String agentModel, String? name, String agentVersion) async {
+  static Future<Client> updateClient(TokenSource auth, String clientID, String fcmToken, String agentModel, String? name, String agentVersion) async {
    return await _request(
      name: 'updateClient',
      method: 'PUT',
-      relURL: 'users/${auth!.userId}/clients/$clientID',
+      relURL: 'users/${auth.getUserID()}/clients/$clientID',
      jsonBody: {
        'fcm_token': fcmToken,
        'agent_model': agentModel,
@ -156,22 +157,32 @@ class APIClient {
        'name': name,
      },
      fn: Client.fromJson,
-      authToken: auth.tokenAdmin,
+      authToken: auth.getToken(),
    );
  }

-  static Future<List<ChannelWithSubscription>> getChannelList(KeyTokenAuth auth, ChannelSelector sel) async {
+  static Future<Client> getClient(TokenSource auth, String cid) async {
+    return await _request(
+      name: 'getClient',
+      method: 'GET',
+      relURL: 'users/${auth.getUserID()}/clients/$cid',
+      fn: Client.fromJson,
+      authToken: auth.getToken(),
+    );
+  }
+
+  static Future<List<ChannelWithSubscription>> getChannelList(TokenSource auth, ChannelSelector sel) async {
    return await _request(
      name: 'getChannelList',
      method: 'GET',
-      relURL: 'users/${auth.userId}/channels',
+      relURL: 'users/${auth.getUserID()}/channels',
      query: {'selector': sel.apiKey},
      fn: (json) => ChannelWithSubscription.fromJsonArray(json['channels'] as List<dynamic>),
-      authToken: auth.tokenAdmin,
+      authToken: auth.getToken(),
    );
  }

-  static Future<(String, List<Message>)> getMessageList(KeyTokenAuth auth, String pageToken, {int? pageSize, List<String>? channelIDs}) async {
+  static Future<(String, List<Message>)> getMessageList(TokenSource auth, String pageToken, {int? pageSize, List<String>? channelIDs}) async {
    return await _request(
      name: 'getMessageList',
      method: 'GET',
@ -182,48 +193,48 @@ class APIClient {
        if (channelIDs != null) 'channel_id': channelIDs.join(","),
      },
      fn: (json) => Message.fromPaginatedJsonArray(json, 'messages', 'next_page_token'),
-      authToken: auth.tokenAdmin,
+      authToken: auth.getToken(),
    );
  }

-  static Future<Message> getMessage(KeyTokenAuth auth, String msgid) async {
+  static Future<Message> getMessage(TokenSource auth, String msgid) async {
    return await _request(
      name: 'getMessage',
      method: 'GET',
      relURL: 'messages/$msgid',
      query: {},
      fn: Message.fromJson,
-      authToken: auth.tokenAdmin,
+      authToken: auth.getToken(),
    );
  }

-  static Future<List<Subscription>> getSubscriptionList(KeyTokenAuth auth) async {
+  static Future<List<Subscription>> getSubscriptionList(TokenSource auth) async {
    return await _request(
      name: 'getSubscriptionList',
      method: 'GET',
-      relURL: 'users/${auth.userId}/subscriptions',
+      relURL: 'users/${auth.getUserID()}/subscriptions',
      fn: (json) => Subscription.fromJsonArray(json['subscriptions'] as List<dynamic>),
-      authToken: auth.tokenAdmin,
+      authToken: auth.getToken(),
    );
  }

-  static Future<List<Client>> getClientList(KeyTokenAuth auth) async {
+  static Future<List<Client>> getClientList(TokenSource auth) async {
    return await _request(
      name: 'getClientList',
      method: 'GET',
-      relURL: 'users/${auth.userId}/clients',
+      relURL: 'users/${auth.getUserID()}/clients',
      fn: (json) => Client.fromJsonArray(json['clients'] as List<dynamic>),
-      authToken: auth.tokenAdmin,
+      authToken: auth.getToken(),
    );
  }

-  static Future<List<KeyToken>> getKeyTokenList(KeyTokenAuth auth) async {
+  static Future<List<KeyToken>> getKeyTokenList(TokenSource auth) async {
    return await _request(
      name: 'getKeyTokenList',
      method: 'GET',
-      relURL: 'users/${auth.userId}/keys',
+      relURL: 'users/${auth.getUserID()}/keys',
      fn: (json) => KeyToken.fromJsonArray(json['keys'] as List<dynamic>),
-      authToken: auth.tokenAdmin,
+      authToken: auth.getToken(),
    );
  }

@ -245,13 +256,13 @@ class APIClient {
    );
  }

-  static Future<KeyToken> getKeyToken(KeyTokenAuth auth, String kid) async {
+  static Future<KeyToken> getKeyToken(TokenSource auth, String kid) async {
    return await _request(
      name: 'getKeyToken',
      method: 'GET',
-      relURL: 'users/${auth.userId}/keys/$kid',
+      relURL: 'users/${auth.getUserID()}/keys/$kid',
      fn: KeyToken.fromJson,
-      authToken: auth.tokenAdmin,
+      authToken: auth.getToken(),
    );
  }

--- a/flutter/lib/api/api_exception.dart
+++ b/flutter/lib/api/api_exception.dart
@ -0,0 +1,13 @@
+class APIException implements Exception {
+  final int httpStatus;
+  final String error;
+  final String errHighlight;
+  final String message;
+
+  APIException(this.httpStatus, this.error, this.errHighlight, this.message);
+
+  @override
+  String toString() {
+    return '[$error] $message';
+  }
+}
--- a/flutter/lib/components/hidable_fab/hidable_fab.dart
+++ b/flutter/lib/components/hidable_fab/hidable_fab.dart
@ -0,0 +1,24 @@
+import 'package:flutter/material.dart';
+
+class HidableFAB extends StatelessWidget {
+  final VoidCallback? onPressed;
+  final IconData icon;
+
+  const HidableFAB({
+    super.key,
+    this.onPressed,
+    required this.icon,
+  });
+
+  Widget build(BuildContext context) {
+    return Visibility(
+      visible: MediaQuery.viewInsetsOf(context).bottom == 0.0, // hide when keyboard is shown
+      child: FloatingActionButton(
+        onPressed: onPressed,
+        shape: const RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(17))),
+        elevation: 2.0,
+        child: Icon(icon),
+      ),
+    );
+  }
+}
--- a/flutter/lib/main.dart
+++ b/flutter/lib/main.dart
@ -3,12 +3,13 @@ import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
 import 'package:hive_flutter/hive_flutter.dart';
 import 'package:simplecloudnotifier/api/api_client.dart';
+import 'package:simplecloudnotifier/models/client.dart';
 import 'package:simplecloudnotifier/nav_layout.dart';
 import 'package:simplecloudnotifier/state/app_theme.dart';
 import 'package:simplecloudnotifier/state/application_log.dart';
 import 'package:simplecloudnotifier/state/globals.dart';
 import 'package:simplecloudnotifier/state/request_log.dart';
-import 'package:simplecloudnotifier/state/user_account.dart';
+import 'package:simplecloudnotifier/state/app_auth.dart';
 import 'package:firebase_core/firebase_core.dart';
 import 'package:toastification/toastification.dart';
 import 'firebase_options.dart';
@ -41,7 +42,20 @@ void main() async {
    ApplicationLog.error('Failed to open Hive-Box: scn-logs: ' + exc.toString(), trace: trace);
  }

-  UserAccount(); // ensure UserAccount is loaded
+  final appAuth = AppAuth(); // ensure UserAccount is loaded
+
+  if (appAuth.isAuth()) {
+    try {
+      await appAuth.loadUser();
+    } catch (exc, trace) {
+      ApplicationLog.error('Failed to load user (on startup): ' + exc.toString(), trace: trace);
+    }
+    try {
+      await appAuth.loadClient();
+    } catch (exc, trace) {
+      ApplicationLog.error('Failed to load user (on startup): ' + exc.toString(), trace: trace);
+    }
+  }

  await Firebase.initializeApp(options: DefaultFirebaseOptions.currentPlatform);

@ -71,7 +85,7 @@ void main() async {
  runApp(
    MultiProvider(
      providers: [
-        ChangeNotifierProvider(create: (context) => UserAccount(), lazy: false),
+        ChangeNotifierProvider(create: (context) => AppAuth(), lazy: false),
        ChangeNotifierProvider(create: (context) => AppTheme(), lazy: false),
      ],
      child: const SCNApp(),
@ -80,27 +94,38 @@ void main() async {
 }

 void setFirebaseToken(String fcmToken) async {
-  final acc = UserAccount();
+  final acc = AppAuth();

  final oldToken = Globals().getPrefFCMToken();

-  if (oldToken != null && oldToken == fcmToken && acc.client != null && acc.client!.fcmToken == fcmToken) {
+  await Globals().setPrefFCMToken(fcmToken);
+
+  ApplicationLog.info('New firebase token received', additional: 'Token: $fcmToken (old: $oldToken)');
+
+  if (!acc.isAuth()) return;
+
+  Client? client;
+  try {
+    client = await acc.loadClient(force: true);
+  } catch (exc, trace) {
+    ApplicationLog.error('Failed to get client: ' + exc.toString(), trace: trace);
+    return;
+  }
+
+  if (oldToken != null && oldToken == fcmToken && client != null && client!.fcmToken == fcmToken) {
    ApplicationLog.info('Firebase token unchanged - do nothing', additional: 'Token: $fcmToken');
    return;
  }

-  ApplicationLog.info('New firebase token received', additional: 'Token: $fcmToken (old: $oldToken)');
-
-  await Globals().setPrefFCMToken(fcmToken);
-
-  if (acc.auth != null) {
-    if (acc.client == null) {
-      final client = await APIClient.addClient(acc.auth, fcmToken, Globals().deviceModel, Globals().version, Globals().hostname, Globals().clientType);
-      acc.setClient(client);
-    } else {
-      final client = await APIClient.updateClient(acc.auth, acc.client!.clientID, fcmToken, Globals().deviceModel, Globals().hostname, Globals().version);
-      acc.setClient(client);
-    }
+  if (client == null) {
+    // should not really happen - perhaps someone externally deleted the client?
+    final newClient = await APIClient.addClient(acc, fcmToken, Globals().deviceModel, Globals().version, Globals().hostname, Globals().clientType);
+    acc.setClientAndClientID(newClient);
+    await acc.save();
+  } else {
+    final newClient = await APIClient.updateClient(acc, client.clientID, fcmToken, Globals().deviceModel, Globals().hostname, Globals().version);
+    acc.setClientAndClientID(newClient);
+    await acc.save();
  }
 }

--- a/flutter/lib/models/key_token_auth.dart
+++ b/flutter/lib/models/key_token_auth.dart
@ -1,11 +0,0 @@
-class KeyTokenAuth {
-  final String userId;
-  final String tokenAdmin;
-  final String tokenSend;
-
-  KeyTokenAuth({
-    required this.userId,
-    required this.tokenAdmin,
-    required this.tokenSend,
-  });
-}
--- a/flutter/lib/nav_layout.dart
+++ b/flutter/lib/nav_layout.dart
@ -2,14 +2,15 @@ import 'package:flutter/material.dart';
 import 'package:flutter_lazy_indexed_stack/flutter_lazy_indexed_stack.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:provider/provider.dart';
+import 'package:simplecloudnotifier/components/hidable_fab/hidable_fab.dart';
 import 'package:simplecloudnotifier/components/layout/app_bar.dart';
 import 'package:simplecloudnotifier/pages/channel_list/channel_list.dart';
-import 'package:simplecloudnotifier/pages/send/root.dart';
+import 'package:simplecloudnotifier/pages/send/send.dart';
 import 'package:simplecloudnotifier/components/bottom_fab/fab_bottom_app_bar.dart';
 import 'package:simplecloudnotifier/pages/account/account.dart';
 import 'package:simplecloudnotifier/pages/message_list/message_list.dart';
 import 'package:simplecloudnotifier/pages/settings/root.dart';
-import 'package:simplecloudnotifier/state/user_account.dart';
+import 'package:simplecloudnotifier/state/app_auth.dart';
 import 'package:simplecloudnotifier/utils/toaster.dart';

 class SCNNavLayout extends StatefulWidget {
@ -24,15 +25,15 @@ class _SCNNavLayoutState extends State<SCNNavLayout> {

  @override
  initState() {
-    final userAcc = Provider.of<UserAccount>(context, listen: false);
-    if (userAcc.auth == null) _selectedIndex = 2;
+    final userAcc = Provider.of<AppAuth>(context, listen: false);
+    if (!userAcc.isAuth()) _selectedIndex = 2;

    super.initState();
  }

  void _onItemTapped(int index) {
-    final userAcc = Provider.of<UserAccount>(context, listen: false);
-    if (userAcc.auth == null) {
+    final userAcc = Provider.of<AppAuth>(context, listen: false);
+    if (!userAcc.isAuth()) {
      Toaster.info("Not logged in", "Please login or create a new account first");
      return;
    }
@ -43,8 +44,8 @@ class _SCNNavLayoutState extends State<SCNNavLayout> {
  }

  void _onFABTapped() {
-    final userAcc = Provider.of<UserAccount>(context, listen: false);
-    if (userAcc.auth == null) {
+    final userAcc = Provider.of<AppAuth>(context, listen: false);
+    if (!userAcc.isAuth()) {
      Toaster.info("Not logged in", "Please login or create a new account first");
      return;
    }
@ -75,16 +76,10 @@ class _SCNNavLayoutState extends State<SCNNavLayout> {
      ),
      bottomNavigationBar: _buildNavBar(context),
      floatingActionButtonLocation: FloatingActionButtonLocation.centerDocked,
-      floatingActionButton: _buildFAB(context),
-    );
-  }
-
-  Widget _buildFAB(BuildContext context) {
-    return FloatingActionButton(
-      onPressed: _onFABTapped,
-      shape: const RoundedRectangleBorder(borderRadius: BorderRadius.all(Radius.circular(17))),
-      elevation: 2.0,
-      child: const Icon(FontAwesomeIcons.solidPaperPlaneTop),
+      floatingActionButton: HidableFAB(
+        onPressed: _onFABTapped,
+        icon: FontAwesomeIcons.solidPaperPlaneTop,
+      ),
    );
  }

--- a/flutter/lib/pages/account/account.dart
+++ b/flutter/lib/pages/account/account.dart
@ -1,15 +1,13 @@
 import 'package:firebase_messaging/firebase_messaging.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:provider/provider.dart';
 import 'package:simplecloudnotifier/api/api_client.dart';
-import 'package:simplecloudnotifier/models/key_token_auth.dart';
 import 'package:simplecloudnotifier/models/user.dart';
 import 'package:simplecloudnotifier/pages/account/login.dart';
 import 'package:simplecloudnotifier/state/application_log.dart';
 import 'package:simplecloudnotifier/state/globals.dart';
-import 'package:simplecloudnotifier/state/user_account.dart';
+import 'package:simplecloudnotifier/state/app_auth.dart';
 import 'package:simplecloudnotifier/utils/toaster.dart';

 class AccountRootPage extends StatefulWidget {
@ -26,7 +24,7 @@ class _AccountRootPageState extends State<AccountRootPage> {
  late Future<int>? futureChannelAllCount;
  late Future<int>? futureChannelSubscribedCount;

-  late UserAccount userAcc;
+  late AppAuth userAcc;

  bool loading = false;

@ -34,7 +32,7 @@ class _AccountRootPageState extends State<AccountRootPage> {
  void initState() {
    super.initState();

-    userAcc = Provider.of<UserAccount>(context, listen: false);
+    userAcc = Provider.of<AppAuth>(context, listen: false);
    userAcc.addListener(_onAuthStateChanged);
    _onAuthStateChanged();
  }
@ -52,34 +50,34 @@ class _AccountRootPageState extends State<AccountRootPage> {
    futureChannelAllCount = null;
    futureChannelSubscribedCount = null;

-    if (userAcc.auth != null) {
+    if (userAcc.isAuth()) {
      futureChannelAllCount = () async {
-        if (userAcc.auth == null) throw new Exception('not logged in');
-        final channels = await APIClient.getChannelList(userAcc.auth!, ChannelSelector.all);
+        if (!userAcc.isAuth()) throw new Exception('not logged in');
+        final channels = await APIClient.getChannelList(userAcc, ChannelSelector.all);
        return channels.length;
      }();

      futureChannelSubscribedCount = () async {
-        if (userAcc.auth == null) throw new Exception('not logged in');
-        final channels = await APIClient.getChannelList(userAcc.auth!, ChannelSelector.subscribed);
+        if (!userAcc.isAuth()) throw new Exception('not logged in');
+        final channels = await APIClient.getChannelList(userAcc, ChannelSelector.subscribed);
        return channels.length;
      }();

      futureSubscriptionCount = () async {
-        if (userAcc.auth == null) throw new Exception('not logged in');
-        final subs = await APIClient.getSubscriptionList(userAcc.auth!);
+        if (!userAcc.isAuth()) throw new Exception('not logged in');
+        final subs = await APIClient.getSubscriptionList(userAcc);
        return subs.length;
      }();

      futureClientCount = () async {
-        if (userAcc.auth == null) throw new Exception('not logged in');
-        final clients = await APIClient.getClientList(userAcc.auth!);
+        if (!userAcc.isAuth()) throw new Exception('not logged in');
+        final clients = await APIClient.getClientList(userAcc);
        return clients.length;
      }();

      futureKeyCount = () async {
-        if (userAcc.auth == null) throw new Exception('not logged in');
-        final keys = await APIClient.getKeyTokenList(userAcc.auth!);
+        if (!userAcc.isAuth()) throw new Exception('not logged in');
+        final keys = await APIClient.getKeyTokenList(userAcc);
        return keys.length;
      }();
    }
@ -87,13 +85,13 @@ class _AccountRootPageState extends State<AccountRootPage> {

  @override
  Widget build(BuildContext context) {
-    return Consumer<UserAccount>(
+    return Consumer<AppAuth>(
      builder: (context, acc, child) {
-        if (acc.auth == null) {
+        if (!userAcc.isAuth()) {
          return _buildNoAuth(context);
        } else {
          return FutureBuilder(
-            future: acc.loadUser(false),
+            future: acc.loadUser(force: false),
            builder: ((context, snapshot) {
              if (snapshot.connectionState == ConnectionState.done) {
                if (snapshot.hasError) {
@ -165,7 +163,7 @@ class _AccountRootPageState extends State<AccountRootPage> {
    );
  }

-  Widget _buildShowAccount(BuildContext context, UserAccount acc, User user) {
+  Widget _buildShowAccount(BuildContext context, AppAuth acc, User user) {
    //TODO better layout
    return Column(
      children: [
@ -446,7 +444,7 @@ class _AccountRootPageState extends State<AccountRootPage> {
  void _createNewAccount() async {
    setState(() => loading = true);

-    final acc = Provider.of<UserAccount>(context, listen: false);
+    final acc = Provider.of<AppAuth>(context, listen: false);

    try {
      final notificationSettings = await FirebaseMessaging.instance.requestPermission(provisional: true);
@ -467,7 +465,7 @@ class _AccountRootPageState extends State<AccountRootPage> {

      final user = await APIClient.createUserWithClient(null, fcmToken, Globals().platform, Globals().version, Globals().hostname, Globals().clientType);

-      acc.set(user.user, user.clients[0], KeyTokenAuth(userId: user.user.userID, tokenAdmin: user.adminKey, tokenSend: user.sendKey));
+      acc.set(user.user, user.clients[0], user.adminKey, user.sendKey);

      await acc.save();
      Toaster.success("Success", 'Successfully Created a new account');
@ -480,7 +478,7 @@ class _AccountRootPageState extends State<AccountRootPage> {
  }

  void _logout() async {
-    final acc = Provider.of<UserAccount>(context, listen: false);
+    final acc = Provider.of<AppAuth>(context, listen: false);

    //TODO clear messages/channels/etc in open views
    acc.clear();
--- a/flutter/lib/pages/account/login.dart
+++ b/flutter/lib/pages/account/login.dart
@ -4,10 +4,10 @@ import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:provider/provider.dart';
 import 'package:simplecloudnotifier/api/api_client.dart';
 import 'package:simplecloudnotifier/components/layout/scaffold.dart';
-import 'package:simplecloudnotifier/models/key_token_auth.dart';
 import 'package:simplecloudnotifier/state/application_log.dart';
 import 'package:simplecloudnotifier/state/globals.dart';
-import 'package:simplecloudnotifier/state/user_account.dart';
+import 'package:simplecloudnotifier/state/app_auth.dart';
+import 'package:simplecloudnotifier/state/token_source.dart';
 import 'package:simplecloudnotifier/utils/toaster.dart';

 class AccountLoginPage extends StatefulWidget {
@ -115,7 +115,7 @@ class _AccountLoginPageState extends State<AccountLoginPage> {
  }

  void _login() async {
-    final acc = Provider.of<UserAccount>(context, listen: false);
+    final acc = Provider.of<AppAuth>(context, listen: false);

    try {
      setState(() => loading = true);
@ -145,13 +145,11 @@ class _AccountLoginPageState extends State<AccountLoginPage> {
        return;
      }

-      final kta = KeyTokenAuth(userId: uid, tokenAdmin: atokv, tokenSend: stokv);
+      final user = await APIClient.getUser(DirectTokenSource(uid, atokv), uid);

-      final user = await APIClient.getUser(kta, uid);
+      final client = await APIClient.addClient(DirectTokenSource(uid, atokv), fcmToken, Globals().deviceModel, Globals().version, Globals().hostname, Globals().clientType);

-      final client = await APIClient.addClient(kta, fcmToken, Globals().deviceModel, Globals().version, Globals().hostname, Globals().clientType);
-
-      acc.set(user, client, kta);
+      acc.set(user, client, atokv, stokv);
      await acc.save();

      Toaster.success("Login", "Successfully logged in");
--- a/flutter/lib/pages/channel_list/channel_list.dart
+++ b/flutter/lib/pages/channel_list/channel_list.dart
@ -4,7 +4,7 @@ import 'package:provider/provider.dart';
 import 'package:simplecloudnotifier/api/api_client.dart';
 import 'package:simplecloudnotifier/models/channel.dart';
 import 'package:simplecloudnotifier/state/application_log.dart';
-import 'package:simplecloudnotifier/state/user_account.dart';
+import 'package:simplecloudnotifier/state/app_auth.dart';
 import 'package:simplecloudnotifier/pages/channel_list/channel_list_item.dart';

 class ChannelRootPage extends StatefulWidget {
@ -17,8 +17,6 @@ class ChannelRootPage extends StatefulWidget {
 class _ChannelRootPageState extends State<ChannelRootPage> {
  final PagingController<int, Channel> _pagingController = PagingController(firstPageKey: 0);

-  late UserAccount userAcc;
-
  @override
  void initState() {
    _pagingController.addPageRequestListener((pageKey) {
@ -34,15 +32,15 @@ class _ChannelRootPageState extends State<ChannelRootPage> {
  }

  Future<void> _fetchPage(int pageKey) async {
-    final acc = Provider.of<UserAccount>(context, listen: false);
+    final acc = Provider.of<AppAuth>(context, listen: false);

-    if (acc.auth == null) {
+    if (!acc.isAuth()) {
      _pagingController.error = 'Not logged in';
      return;
    }

    try {
-      final items = (await APIClient.getChannelList(acc.auth!, ChannelSelector.all)).map((p) => p.channel).toList();
+      final items = (await APIClient.getChannelList(acc, ChannelSelector.all)).map((p) => p.channel).toList();

      items.sort((a, b) => -1 * (a.timestampLastSent ?? '').compareTo(b.timestampLastSent ?? ''));

--- a/flutter/lib/pages/channel_list/channel_list_item.dart
+++ b/flutter/lib/pages/channel_list/channel_list_item.dart
@ -4,7 +4,7 @@ import 'package:provider/provider.dart';
 import 'package:simplecloudnotifier/api/api_client.dart';
 import 'package:simplecloudnotifier/models/channel.dart';
 import 'package:simplecloudnotifier/models/message.dart';
-import 'package:simplecloudnotifier/state/user_account.dart';
+import 'package:simplecloudnotifier/state/app_auth.dart';

 class ChannelListItem extends StatefulWidget {
  static final _dateFormat = DateFormat('yyyy-MM-dd kk:mm');
@ -29,11 +29,11 @@ class _ChannelListItemState extends State<ChannelListItem> {
  void initState() {
    super.initState();

-    final acc = Provider.of<UserAccount>(context, listen: false);
+    final acc = Provider.of<AppAuth>(context, listen: false);

-    if (acc.auth != null) {
+    if (acc.isAuth()) {
      () async {
-        final (_, channelMessages) = await APIClient.getMessageList(acc.auth!, '@start', pageSize: 1, channelIDs: [widget.channel.channelID]);
+        final (_, channelMessages) = await APIClient.getMessageList(acc, '@start', pageSize: 1, channelIDs: [widget.channel.channelID]);
        setState(() {
          lastMessage = channelMessages.firstOrNull;
        });
--- a/flutter/lib/pages/message_list/message_list.dart
+++ b/flutter/lib/pages/message_list/message_list.dart
@ -6,7 +6,7 @@ import 'package:simplecloudnotifier/models/channel.dart';
 import 'package:simplecloudnotifier/models/message.dart';
 import 'package:simplecloudnotifier/pages/message_view/message_view.dart';
 import 'package:simplecloudnotifier/state/application_log.dart';
-import 'package:simplecloudnotifier/state/user_account.dart';
+import 'package:simplecloudnotifier/state/app_auth.dart';
 import 'package:simplecloudnotifier/pages/message_list/message_list_item.dart';

 class MessageListPage extends StatefulWidget {
@ -38,20 +38,20 @@ class _MessageListPageState extends State<MessageListPage> {
  }

  Future<void> _fetchPage(String thisPageToken) async {
-    final acc = Provider.of<UserAccount>(context, listen: false);
+    final acc = Provider.of<AppAuth>(context, listen: false);

-    if (acc.auth == null) {
+    if (!acc.isAuth()) {
      _pagingController.error = 'Not logged in';
      return;
    }

    try {
      if (_channels == null) {
-        final channels = await APIClient.getChannelList(acc.auth!, ChannelSelector.allAny);
+        final channels = await APIClient.getChannelList(acc, ChannelSelector.allAny);
        _channels = <String, Channel>{for (var v in channels) v.channel.channelID: v.channel};
      }

-      final (npt, newItems) = await APIClient.getMessageList(acc.auth!, thisPageToken, pageSize: _pageSize);
+      final (npt, newItems) = await APIClient.getMessageList(acc, thisPageToken, pageSize: _pageSize);

      if (npt == '@end') {
        _pagingController.appendLastPage(newItems);
--- a/flutter/lib/pages/message_view/message_view.dart
+++ b/flutter/lib/pages/message_view/message_view.dart
@ -3,7 +3,7 @@ import 'package:provider/provider.dart';
 import 'package:simplecloudnotifier/api/api_client.dart';
 import 'package:simplecloudnotifier/components/layout/scaffold.dart';
 import 'package:simplecloudnotifier/models/message.dart';
-import 'package:simplecloudnotifier/state/user_account.dart';
+import 'package:simplecloudnotifier/state/app_auth.dart';

 class MessageViewPage extends StatefulWidget {
  const MessageViewPage({super.key, required this.message});
@ -24,9 +24,9 @@ class _MessageViewPageState extends State<MessageViewPage> {
  }

  Future<Message> fetchMessage() async {
-    final acc = Provider.of<UserAccount>(context, listen: false);
+    final acc = Provider.of<AppAuth>(context, listen: false);

-    return await APIClient.getMessage(acc.auth!, widget.message.messageID);
+    return await APIClient.getMessage(acc, widget.message.messageID);
  }

  @override
--- a/flutter/lib/pages/send/root.dart
+++ b/flutter/lib/pages/send/root.dart
@ -1,159 +0,0 @@
-import 'package:flutter/material.dart';
-import 'package:provider/provider.dart';
-import 'package:qr_flutter/qr_flutter.dart';
-import 'package:simplecloudnotifier/state/application_log.dart';
-import 'package:url_launcher/url_launcher.dart';
-import 'package:simplecloudnotifier/state/user_account.dart';
-
-class SendRootPage extends StatefulWidget {
-  const SendRootPage({super.key});
-
-  @override
-  State<SendRootPage> createState() => _SendRootPageState();
-}
-
-class _SendRootPageState extends State<SendRootPage> {
-  late TextEditingController _msgTitle;
-  late TextEditingController _msgContent;
-
-  @override
-  void initState() {
-    super.initState();
-    _msgTitle = TextEditingController();
-    _msgContent = TextEditingController();
-  }
-
-  @override
-  void dispose() {
-    _msgTitle.dispose();
-    _msgContent.dispose();
-    super.dispose();
-  }
-
-  @override
-  Widget build(BuildContext context) {
-    return Consumer<UserAccount>(
-      builder: (context, acc, child) {
-        return Padding(
-          padding: const EdgeInsets.all(16.0),
-          child: Column(
-            mainAxisAlignment: MainAxisAlignment.center,
-            children: [
-              _buildQRCode(context, acc),
-              const SizedBox(height: 16),
-              FractionallySizedBox(
-                widthFactor: 1.0,
-                child: TextField(
-                  controller: _msgTitle,
-                  decoration: const InputDecoration(
-                    border: OutlineInputBorder(),
-                    labelText: 'Title',
-                  ),
-                ),
-              ),
-              const SizedBox(height: 16),
-              FractionallySizedBox(
-                widthFactor: 1.0,
-                child: TextField(
-                  controller: _msgContent,
-                  decoration: const InputDecoration(
-                    border: OutlineInputBorder(),
-                    labelText: 'Text',
-                  ),
-                ),
-              ),
-              const SizedBox(height: 16),
-              FilledButton(
-                style: FilledButton.styleFrom(textStyle: const TextStyle(fontSize: 20)),
-                onPressed: _send,
-                child: const Text('Send'),
-              ),
-            ],
-          ),
-        );
-      },
-    );
-  }
-
-  void _send() {
-    //...
-  }
-
-  Widget _buildQRCode(BuildContext context, UserAccount acc) {
-    if (acc.auth == null) {
-      return const Placeholder();
-    }
-
-    if (acc.user == null) {
-      return FutureBuilder(
-        future: acc.loadUser(false),
-        builder: ((context, snapshot) {
-          if (snapshot.connectionState == ConnectionState.done) {
-            if (snapshot.hasError) {
-              return Text('Error: ${snapshot.error}'); //TODO better error display
-            }
-            var url = 'https://simplecloudnotifier.de?preset_user_id=${acc.user!.userID}&preset_user_key=${acc.auth!.tokenSend}';
-            return GestureDetector(
-              onTap: () {
-                _openWeb(url);
-              },
-              child: QrImageView(
-                data: url,
-                version: QrVersions.auto,
-                size: 400.0,
-                eyeStyle: QrEyeStyle(
-                  eyeShape: QrEyeShape.square,
-                  color: Theme.of(context).textTheme.bodyLarge?.color,
-                ),
-                dataModuleStyle: QrDataModuleStyle(
-                  dataModuleShape: QrDataModuleShape.square,
-                  color: Theme.of(context).textTheme.bodyLarge?.color,
-                ),
-              ),
-            );
-          }
-          return const SizedBox(
-            width: 400.0,
-            height: 400.0,
-            child: Center(child: CircularProgressIndicator()),
-          );
-        }),
-      );
-    }
-
-    var url = 'https://simplecloudnotifier.de?preset_user_id=${acc.user!.userID}&preset_user_key=${acc.auth!.tokenSend}';
-
-    return GestureDetector(
-      onTap: () {
-        _openWeb(url);
-      },
-      child: QrImageView(
-        data: url,
-        version: QrVersions.auto,
-        size: 400.0,
-        eyeStyle: QrEyeStyle(
-          eyeShape: QrEyeShape.square,
-          color: Theme.of(context).textTheme.bodyLarge?.color,
-        ),
-        dataModuleStyle: QrDataModuleStyle(
-          dataModuleShape: QrDataModuleShape.square,
-          color: Theme.of(context).textTheme.bodyLarge?.color,
-        ),
-      ),
-    );
-  }
-
-  void _openWeb(String url) async {
-    try {
-      final Uri uri = Uri.parse(url);
-
-      if (await canLaunchUrl(uri)) {
-        await launchUrl(uri);
-      } else {
-        // TODO ("Cannot open URL");
-      }
-    } catch (exc, trace) {
-      ApplicationLog.error('Failed to open URL: ' + exc.toString(), additional: 'URL: ${url}', trace: trace);
-    }
-  }
-}
--- a/flutter/lib/pages/send/send.dart
+++ b/flutter/lib/pages/send/send.dart
@ -0,0 +1,142 @@
+import 'package:flutter/material.dart';
+import 'package:provider/provider.dart';
+import 'package:qr_flutter/qr_flutter.dart';
+import 'package:simplecloudnotifier/state/application_log.dart';
+import 'package:url_launcher/url_launcher.dart';
+import 'package:simplecloudnotifier/state/app_auth.dart';
+
+class SendRootPage extends StatefulWidget {
+  const SendRootPage({super.key});
+
+  @override
+  State<SendRootPage> createState() => _SendRootPageState();
+}
+
+class _SendRootPageState extends State<SendRootPage> {
+  late TextEditingController _msgTitle;
+  late TextEditingController _msgContent;
+
+  @override
+  void initState() {
+    super.initState();
+    _msgTitle = TextEditingController();
+    _msgContent = TextEditingController();
+  }
+
+  @override
+  void dispose() {
+    _msgTitle.dispose();
+    _msgContent.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Consumer<AppAuth>(
+      builder: (context, acc, child) {
+        return SingleChildScrollView(
+          child: Padding(
+            padding: const EdgeInsets.all(16.0),
+            child: Column(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                _buildQRCode(context, acc),
+                const SizedBox(height: 16),
+                FractionallySizedBox(
+                  widthFactor: 1.0,
+                  child: TextField(
+                    controller: _msgTitle,
+                    decoration: const InputDecoration(
+                      border: OutlineInputBorder(),
+                      labelText: 'Title',
+                    ),
+                  ),
+                ),
+                const SizedBox(height: 16),
+                FractionallySizedBox(
+                  widthFactor: 1.0,
+                  child: TextField(
+                    controller: _msgContent,
+                    decoration: const InputDecoration(
+                      border: OutlineInputBorder(),
+                      labelText: 'Text',
+                    ),
+                    minLines: 2,
+                    maxLines: null,
+                    keyboardType: TextInputType.multiline,
+                  ),
+                ),
+                const SizedBox(height: 16),
+                FilledButton(
+                  style: FilledButton.styleFrom(textStyle: const TextStyle(fontSize: 20)),
+                  onPressed: _send,
+                  child: const Text('Send'),
+                ),
+                const SizedBox(height: 32),
+              ],
+            ),
+          ),
+        );
+      },
+    );
+  }
+
+  void _send() {
+    //...
+  }
+
+  Widget _buildQRCode(BuildContext context, AppAuth acc) {
+    if (!acc.isAuth()) {
+      return const Placeholder();
+    }
+
+    return FutureBuilder(
+      future: acc.loadUser(force: false),
+      builder: ((context, snapshot) {
+        if (snapshot.connectionState == ConnectionState.done) {
+          if (snapshot.hasError) {
+            return Text('Error: ${snapshot.error}'); //TODO better error display
+          }
+          var url = (acc.tokenSend == null) ? 'https://simplecloudnotifier.de?preset_user_id=${acc.userID}' : 'https://simplecloudnotifier.de?preset_user_id=${acc.userID}&preset_user_key=${acc.tokenSend}';
+          return GestureDetector(
+            onTap: () {
+              _openWeb(url);
+            },
+            child: QrImageView(
+              data: url,
+              version: QrVersions.auto,
+              size: 300.0,
+              eyeStyle: QrEyeStyle(
+                eyeShape: QrEyeShape.square,
+                color: Theme.of(context).textTheme.bodyLarge?.color,
+              ),
+              dataModuleStyle: QrDataModuleStyle(
+                dataModuleShape: QrDataModuleShape.square,
+                color: Theme.of(context).textTheme.bodyLarge?.color,
+              ),
+            ),
+          );
+        }
+        return const SizedBox(
+          width: 300.0,
+          height: 300.0,
+          child: Center(child: CircularProgressIndicator()),
+        );
+      }),
+    );
+  }
+
+  void _openWeb(String url) async {
+    try {
+      final Uri uri = Uri.parse(url);
+
+      if (await canLaunchUrl(uri)) {
+        await launchUrl(uri);
+      } else {
+        // TODO ("Cannot open URL");
+      }
+    } catch (exc, trace) {
+      ApplicationLog.error('Failed to open URL: ' + exc.toString(), additional: 'URL: ${url}', trace: trace);
+    }
+  }
+}
--- a/flutter/lib/state/app_auth.dart
+++ b/flutter/lib/state/app_auth.dart
@ -0,0 +1,157 @@
+import 'package:flutter/foundation.dart';
+import 'package:shared_preferences/shared_preferences.dart';
+import 'package:simplecloudnotifier/api/api_client.dart';
+import 'package:simplecloudnotifier/api/api_exception.dart';
+import 'package:simplecloudnotifier/models/client.dart';
+import 'package:simplecloudnotifier/models/user.dart';
+import 'package:simplecloudnotifier/state/globals.dart';
+import 'package:simplecloudnotifier/state/token_source.dart';
+
+class AppAuth extends ChangeNotifier implements TokenSource {
+  String? _clientID;
+  String? _userID;
+  String? _tokenAdmin;
+  String? _tokenSend;
+
+  User? _user;
+  Client? _client;
+
+  String? get userID => _userID;
+  String? get tokenAdmin => _tokenAdmin;
+  String? get tokenSend => _tokenSend;
+
+  static AppAuth? _singleton = AppAuth._internal();
+
+  factory AppAuth() {
+    return _singleton ?? (_singleton = AppAuth._internal());
+  }
+
+  AppAuth._internal() {
+    load();
+  }
+
+  bool isAuth() {
+    return _userID != null && _tokenAdmin != null;
+  }
+
+  void set(User user, Client client, String tokenAdmin, String tokenSend) {
+    _client = client;
+    _user = user;
+    _userID = user.userID;
+    _clientID = client.clientID;
+    _tokenAdmin = tokenAdmin;
+    _tokenSend = tokenSend;
+    notifyListeners();
+  }
+
+  void setClientAndClientID(Client client) {
+    _client = client;
+    _clientID = client.clientID;
+    notifyListeners();
+  }
+
+  void clear() {
+    _clientID = null;
+    _userID = null;
+    _tokenAdmin = null;
+    _tokenSend = null;
+
+    _client = null;
+    _user = null;
+
+    notifyListeners();
+  }
+
+  void load() {
+    final uid = Globals().sharedPrefs.getString('auth.userid');
+    final cid = Globals().sharedPrefs.getString('auth.clientid');
+    final toka = Globals().sharedPrefs.getString('auth.tokenadmin');
+    final toks = Globals().sharedPrefs.getString('auth.tokensend');
+
+    if (uid == null || toka == null || toks == null || cid == null) {
+      clear();
+      return;
+    }
+
+    _clientID = cid;
+    _userID = uid;
+    _tokenAdmin = toka;
+    _tokenSend = toks;
+
+    _client = null;
+    _user = null;
+
+    notifyListeners();
+  }
+
+  Future<void> save() async {
+    final prefs = await SharedPreferences.getInstance();
+    if (_clientID == null || _userID == null || _tokenAdmin == null || _tokenSend == null) {
+      await prefs.remove('auth.userid');
+      await prefs.remove('auth.tokenadmin');
+      await prefs.remove('auth.tokensend');
+    } else {
+      await prefs.setString('auth.userid', _userID!);
+      await prefs.setString('auth.clientid', _clientID!);
+      await prefs.setString('auth.tokenadmin', _tokenAdmin!);
+      await prefs.setString('auth.tokensend', _tokenSend!);
+    }
+  }
+
+  Future<User> loadUser({bool force = false}) async {
+    if (!force && _user != null && _user!.userID == _userID) {
+      return _user!;
+    }
+
+    if (_userID == null || _tokenAdmin == null) {
+      throw Exception('Not authenticated');
+    }
+
+    final user = await APIClient.getUser(this, _userID!);
+
+    _user = user;
+    notifyListeners();
+
+    await save();
+
+    return user;
+  }
+
+  Future<Client?> loadClient({bool force = false}) async {
+    if (!force && _client != null && _client!.clientID == _clientID) {
+      return _client!;
+    }
+
+    if (_clientID == null || _tokenAdmin == null) {
+      throw Exception('Not authenticated');
+    }
+
+    try {
+      final client = await APIClient.getClient(this, _clientID!);
+
+      _client = client;
+      notifyListeners();
+
+      await save();
+
+      return client;
+    } on APIException catch (_) {
+      _client = null;
+      notifyListeners();
+      return null;
+    } catch (exc) {
+      _client = null;
+      rethrow;
+    }
+  }
+
+  @override
+  String getToken() {
+    return _tokenAdmin!;
+  }
+
+  @override
+  String getUserID() {
+    return _userID!;
+  }
+}
--- a/flutter/lib/state/token_source.dart
+++ b/flutter/lib/state/token_source.dart
@ -0,0 +1,21 @@
+abstract class TokenSource {
+  String getToken();
+  String getUserID();
+}
+
+class DirectTokenSource implements TokenSource {
+  final String _userID;
+  final String _token;
+
+  DirectTokenSource(this._userID, this._token);
+
+  @override
+  String getUserID() {
+    return _userID;
+  }
+
+  @override
+  String getToken() {
+    return _token;
+  }
+}
--- a/flutter/lib/state/user_account.dart
+++ b/flutter/lib/state/user_account.dart
@ -1,117 +0,0 @@
-import 'package:flutter/foundation.dart';
-import 'package:shared_preferences/shared_preferences.dart';
-import 'package:simplecloudnotifier/api/api_client.dart';
-import 'package:simplecloudnotifier/models/client.dart';
-import 'package:simplecloudnotifier/models/key_token_auth.dart';
-import 'package:simplecloudnotifier/models/user.dart';
-import 'package:simplecloudnotifier/state/globals.dart';
-
-class UserAccount extends ChangeNotifier {
-  User? _user;
-  User? get user => _user;
-
-  Client? _client;
-  Client? get client => _client;
-
-  KeyTokenAuth? _auth;
-  KeyTokenAuth? get auth => _auth;
-
-  static UserAccount? _singleton = UserAccount._internal();
-
-  factory UserAccount() {
-    return _singleton ?? (_singleton = UserAccount._internal());
-  }
-
-  UserAccount._internal() {
-    load();
-  }
-
-  void setToken(KeyTokenAuth auth) {
-    _auth = auth;
-    _user = null;
-    notifyListeners();
-  }
-
-  void clearToken() {
-    _auth = null;
-    _user = null;
-    notifyListeners();
-  }
-
-  void setUser(User user) {
-    _user = user;
-    notifyListeners();
-  }
-
-  void clearUser() {
-    _user = null;
-    notifyListeners();
-  }
-
-  void setClient(Client client) {
-    _client = client;
-    notifyListeners();
-  }
-
-  void clearClient() {
-    _client = null;
-    notifyListeners();
-  }
-
-  void set(User user, Client client, KeyTokenAuth auth) {
-    _client = client;
-    _user = user;
-    _auth = auth;
-    notifyListeners();
-  }
-
-  void clear() {
-    _client = null;
-    _user = null;
-    _auth = null;
-    notifyListeners();
-  }
-
-  void load() {
-    final uid = Globals().sharedPrefs.getString('auth.userid');
-    final toka = Globals().sharedPrefs.getString('auth.tokenadmin');
-    final toks = Globals().sharedPrefs.getString('auth.tokensend');
-
-    if (uid != null && toka != null && toks != null) {
-      setToken(KeyTokenAuth(userId: uid, tokenAdmin: toka, tokenSend: toks));
-    } else {
-      clearToken();
-    }
-  }
-
-  Future<void> save() async {
-    final prefs = await SharedPreferences.getInstance();
-    if (_auth == null) {
-      await prefs.remove('auth.userid');
-      await prefs.remove('auth.tokenadmin');
-      await prefs.remove('auth.tokensend');
-    } else {
-      await prefs.setString('auth.userid', _auth!.userId);
-      await prefs.setString('auth.tokenadmin', _auth!.tokenAdmin);
-      await prefs.setString('auth.tokensend', _auth!.tokenSend);
-    }
-  }
-
-  Future<User> loadUser(bool force) async {
-    if (!force && _user != null) {
-      return _user!;
-    }
-
-    if (_auth == null) {
-      throw Exception('Not authenticated');
-    }
-
-    final user = await APIClient.getUser(_auth!, _auth!.userId);
-
-    setUser(user);
-
-    await save();
-
-    return user;
-  }
-}