Add basic new message notifications

lib/apis/user_api.dart

@@ -13,6 +13,13 @@ class UserApi {
     return data.map((e) => User.fromMap(e));
   }
   
+  static Future<User> getUser(ApiClient client, {required String userId}) async {
+    final response = await client.get("/users/$userId/");
+    ApiClient.checkResponse(response);
+    final data = jsonDecode(response.body);
+    return User.fromMap(data);
+  }
+
   static Future<void> addUserAsFriend(ApiClient client, {required User user}) async {
     final friend = Friend(
       id: user.id,

lib/auxiliary.dart

@@ -66,11 +66,13 @@ extension Unique<E, Id> on List<E> {
   }
 }
 
-extension StripHTLM on String {
+extension Strip on String {
   String stripHtml() {
     final document = htmlparser.parse(this);
     return htmlparser.parse(document.body?.text).documentElement?.text ?? "";
   }
+
+  String stripUid() => startsWith("U-") ? substring(2) : this;
 }
 
 extension Format on Duration {

lib/clients/api_client.dart

@@ -150,6 +150,7 @@ class ClientHolder extends InheritedWidget {
   final ApiClient apiClient;
   final SettingsClient settingsClient;
   late final MessagingClient messagingClient;
+  final NotificationClient notificationClient = NotificationClient();
 
   ClientHolder({
     super.key,
@@ -157,7 +158,7 @@ class ClientHolder extends InheritedWidget {
     required this.settingsClient,
     required super.child
   }) : apiClient = ApiClient(authenticationData: authenticationData) {
-    messagingClient = MessagingClient(apiClient: apiClient);
+    messagingClient = MessagingClient(apiClient: apiClient, notificationClient: notificationClient);
   }
 
   static ClientHolder? maybeOf(BuildContext context) {

lib/clients/messaging_client.dart

@@ -1,9 +1,13 @@
 import 'dart:convert';
 import 'dart:io';
 import 'package:contacts_plus_plus/apis/message_api.dart';
+import 'package:contacts_plus_plus/auxiliary.dart';
 import 'package:contacts_plus_plus/models/authentication_data.dart';
 import 'package:contacts_plus_plus/models/friend.dart';
+import 'package:contacts_plus_plus/models/session.dart';
+import 'package:flutter_local_notifications/flutter_local_notifications.dart' as fln;
 import 'package:http/http.dart' as http;
+import 'package:collection/collection.dart';
 
 import 'package:contacts_plus_plus/clients/api_client.dart';
 import 'package:contacts_plus_plus/config.dart';
@@ -19,7 +23,7 @@ enum EventType {
 enum EventTarget {
   unknown,
   messageSent,
-  messageReceived,
+  receiveMessage,
   messagesRead;
 
   factory EventTarget.parse(String? text) {
@@ -41,11 +45,12 @@ class MessagingClient {
   final Map<String, Function> _updateListeners = {};
   final Logger _logger = Logger("NeosHub");
   final Workmanager _workmanager = Workmanager();
+  final NotificationClient _notificationClient;
   WebSocket? _wsChannel;
   bool _isConnecting = false;
 
-  MessagingClient({required ApiClient apiClient})
+  MessagingClient({required ApiClient apiClient, required NotificationClient notificationClient})
-      : _apiClient = apiClient {
+      : _apiClient = apiClient, _notificationClient = notificationClient {
     start();
   }
 
@@ -183,11 +188,14 @@ class MessagingClient {
         cache.addMessage(message);
         notifyListener(message.recipientId);
         break;
-      case EventTarget.messageReceived:
+      case EventTarget.receiveMessage:
         final msg = args[0];
         final message = Message.fromMap(msg);
         final cache = await getMessageCache(message.senderId);
         cache.addMessage(message);
+        if (!_updateListeners.containsKey(message.senderId)) {
+          _notificationClient.showUnreadMessagesNotification([message]);
+        }
         notifyListener(message.senderId);
         break;
       case EventTarget.messagesRead:
@@ -229,3 +237,90 @@ class MessagingClient {
     _sendData(data);
   }
 }
+
+class NotificationChannel {
+  final String id;
+  final String name;
+  final String description;
+
+  const NotificationChannel({required this.name, required this.id, required this.description});
+}
+
+class NotificationClient {
+  static const NotificationChannel _messageChannel = NotificationChannel(
+    id: "messages",
+    name: "Messages",
+    description: "Messages received from your friends",
+  );
+
+  final fln.FlutterLocalNotificationsPlugin _notifier = fln.FlutterLocalNotificationsPlugin()
+    ..initialize(
+        const fln.InitializationSettings(
+          android: fln.AndroidInitializationSettings("ic_notification"),
+        )
+    );
+
+  Future<void> showUnreadMessagesNotification(List<Message> messages) async {
+    if (messages.isEmpty) return;
+
+    final bySender = groupBy(messages, (p0) => p0.senderId);
+
+    for (final entry in bySender.entries) {
+
+      final uname = entry.key.stripUid();
+      await _notifier.show(
+        uname.hashCode,
+        null,
+        null,
+        fln.NotificationDetails(android: fln.AndroidNotificationDetails(
+          _messageChannel.id,
+          _messageChannel.name,
+          channelDescription: _messageChannel.description,
+          importance: fln.Importance.high,
+          priority: fln.Priority.max,
+          styleInformation: fln.MessagingStyleInformation(
+            fln.Person(
+              name: uname,
+              bot: false,
+            ),
+            groupConversation: false,
+            messages: entry.value.map((message) {
+              String content;
+              switch (message.type) {
+                case MessageType.unknown:
+                  content = "Unknown Message Type";
+                  break;
+                case MessageType.text:
+                  content = message.content;
+                  break;
+                case MessageType.sound:
+                  content = "Audio Message";
+                  break;
+                case MessageType.sessionInvite:
+                  try {
+                    final session = Session.fromMap(jsonDecode(message.content));
+                    content = "Session Invite to ${session.name}";
+                  } catch (e) {
+                    content = "Session Invite";
+                  }
+                  break;
+                case MessageType.object:
+                  content = "Asset";
+                  break;
+              }
+              return fln.Message(
+                content,
+                message.sendTime,
+                fln.Person(
+                  name: uname,
+                  bot: false,
+                ),
+              );
+            }).toList(),
+          ),
+        ),
+        ),
+      );
+    }
+  }
+}

lib/widgets/friends_list.dart

@@ -60,7 +60,6 @@ class _FriendsListState extends State<FriendsList> {
     _friendsFuture = FriendApi.getFriendsList(_clientHolder!.apiClient).then((Iterable<Friend> value) async {
       final unreadMessages = await MessageApi.getUserMessages(_clientHolder!.apiClient, unreadOnly: true);
       _unreads.clear();
-
       for (final msg in unreadMessages) {
         if (msg.senderId != _clientHolder!.apiClient.userId) {
           final value = _unreads[msg.senderId];
@@ -128,7 +127,7 @@ class _FriendsListState extends State<FriendsList> {
                       } else {
                         _autoRefresh = Timer(_autoRefreshDuration, () => setState(() => _refreshFriendsList()));
                       }
-                    })
+                    }),
                   ].map((item) =>
                       PopupMenuItem<MenuItemDefinition>(
                         value: item,

lib/widgets/messages_list.dart

@@ -49,8 +49,15 @@ class _MessagesListState extends State<MessagesList> {
     _messageCacheFutureComplete = false;
     _messageCacheFuture = _clientHolder?.messagingClient.getMessageCache(widget.friend.id)
         .whenComplete(() => _messageCacheFutureComplete = true);
-    _clientHolder?.messagingClient.registerListener(
+    final mClient = _clientHolder?.messagingClient;
-        widget.friend.id, () => setState(() {}));
+    final id = widget.friend.id;
+    mClient?.registerListener(id, () {
+      if (context.mounted) {
+        setState(() {});
+      } else {
+        mClient.unregisterListener(id);
+      }
+    });
   }
 
   @override

pubspec.lock

@@ -74,7 +74,7 @@ packages:
     source: hosted
     version: "1.1.1"
   collection:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: collection
       sha256: cfc915e6923fe5ce6e153b0723c753045de46de1b4d63771530504004a45fae0

pubspec.yaml

@@ -50,6 +50,7 @@ dependencies:
   url_launcher: ^6.1.10
   workmanager: ^0.5.1
   flutter_local_notifications: ^14.0.0+1
+  collection: any
 
 dev_dependencies:
   flutter_test: