Add preliminary hash based session handling

lib/clients/messaging_client.dart

@@ -1,6 +1,8 @@
 import 'dart:async';
+import 'package:contacts_plus_plus/apis/session_api.dart';
+import 'package:contacts_plus_plus/crypto_helper.dart';
 import 'package:contacts_plus_plus/hub_manager.dart';
-import 'package:contacts_plus_plus/models/users/online_status.dart';
+import 'package:contacts_plus_plus/models/session.dart';
 import 'package:contacts_plus_plus/models/users/user_status.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/widgets.dart';
@@ -58,13 +60,14 @@ class MessagingClient extends ChangeNotifier {
   final Logger _logger = Logger("Messaging");
   final NotificationClient _notificationClient;
   final HubManager _hubManager = HubManager();
+  final Map<String, Session> _sessionMap = {};
   Friend? selectedFriend;
 
   Timer? _notifyOnlineTimer;
   Timer? _autoRefresh;
   Timer? _unreadSafeguard;
   String? _initStatus;
-  UserStatus _userStatus = UserStatus.empty().copyWith(onlineStatus: OnlineStatus.online);
+  UserStatus _userStatus = UserStatus.initial();
 
   UserStatus get userStatus => _userStatus;
 
@@ -73,9 +76,14 @@ class MessagingClient extends ChangeNotifier {
         _notificationClient = notificationClient {
     debugPrint("mClient created: $hashCode");
     Hive.openBox(_messageBoxKey).then((box) async {
-      box.delete(_lastUpdateKey);
+      await box.delete(_lastUpdateKey);
-    });
+      final activeSessions = await SessionApi.getSessions(apiClient);
+      for (final session in activeSessions) {
+        final idHash = CryptoHelper.idHash(session.id + _userStatus.hashSalt);
+        _sessionMap[idHash] = session;
+      }
       _setupHub();
+    });
   }
 
   @override
@@ -105,6 +113,8 @@ class MessagingClient extends ChangeNotifier {
 
   MessageCache _createUserMessageCache(String userId) => MessageCache(apiClient: _apiClient, userId: userId);
 
+  Session? getSessionInfo(String idHash) => _sessionMap[idHash];
+
   Future<void> refreshFriendsListWithErrorHandler() async {
     try {
       await refreshFriendsList();
@@ -147,17 +157,19 @@ class MessagingClient extends ChangeNotifier {
 
     _userStatus = status.copyWith(
       appVersion: "${pkginfo.version} of ${pkginfo.appName}",
-      isMobile: true,
       lastStatusChange: DateTime.now(),
     );
 
-    _hubManager.send("BroadcastStatus", arguments: [
+    _hubManager.send(
+      "BroadcastStatus",
+      arguments: [
         _userStatus.toMap(),
         {
           "group": 0,
           "targetIds": [],
         }
-    ]);
+      ],
+    );
 
     final self = getAsFriend(_apiClient.userId);
     await _updateContact(self!.copyWith(userStatus: _userStatus));
@@ -272,6 +284,7 @@ class MessagingClient extends ChangeNotifier {
     _hubManager.setHandler(EventTarget.receiveSessionUpdate, _onReceiveSessionUpdate);
 
     await _hubManager.start();
+    setUserStatus(userStatus);
     _hubManager.send(
       "InitializeStatus",
       responseHandler: (Map data) async {
@@ -335,5 +348,12 @@ class MessagingClient extends ChangeNotifier {
     notifyListeners();
   }
 
-  void _onReceiveSessionUpdate(List args) {}
+  void _onReceiveSessionUpdate(List args) {
+    for (final sessionUpdate in args) {
+      final session = Session.fromMap(sessionUpdate);
+      final idHash = CryptoHelper.idHash(session.id + _userStatus.hashSalt);
+      _sessionMap[idHash] = session;
+    }
+    notifyListeners();
+  }
 }

lib/crypto_helper.dart

@@ -0,0 +1,14 @@
+import 'dart:convert';
+import 'dart:math';
+
+import 'package:crypto/crypto.dart';
+
+class CryptoHelper {
+  static final Random _random = Random.secure();
+
+  static List<int> randomBytes(int length) => List<int>.generate(length, (i) => _random.nextInt(256));
+
+  static String cryptoToken([int length = 128]) => base64UrlEncode(randomBytes(length)).replaceAll("/", "_");
+
+  static String idHash(String id) => sha256.convert(utf8.encode(id)).toString().replaceAll("-", "").toUpperCase();
+}

lib/models/session.dart

@@ -1,4 +1,7 @@
+import 'dart:convert';
+
 import 'package:contacts_plus_plus/string_formatter.dart';
+import 'package:crypto/crypto.dart';
 
 class Session {
   final String id;
@@ -96,15 +99,15 @@ class Session {
 enum SessionAccessLevel {
   unknown,
   private,
-  friends,
+  contacts,
-  friendsOfFriends,
+  contactsPlus,
   anyone;
 
   static const _readableNamesMap = {
     SessionAccessLevel.unknown: "Unknown",
     SessionAccessLevel.private: "Private",
-    SessionAccessLevel.friends: "Contacts",
+    SessionAccessLevel.contacts: "Contacts",
-    SessionAccessLevel.friendsOfFriends: "Contacts+",
+    SessionAccessLevel.contactsPlus: "Contacts+",
     SessionAccessLevel.anyone: "Anyone",
   };
 

lib/models/session_metadata.dart

@@ -0,0 +1,38 @@
+import 'package:contacts_plus_plus/models/session.dart';
+import 'package:intl/intl.dart';
+
+class SessionMetadata {
+  final String sessionHash;
+  final SessionAccessLevel accessLevel;
+  final bool sessionHidden;
+  final bool? isHost;
+  final String? broadcastKey;
+
+  SessionMetadata({
+    required this.sessionHash,
+    required this.accessLevel,
+    required this.sessionHidden,
+    required this.isHost,
+    required this.broadcastKey,
+  });
+
+  factory SessionMetadata.fromMap(Map map) {
+    return SessionMetadata(
+      sessionHash: map["sessionHash"],
+      accessLevel: SessionAccessLevel.fromName(map["accessLevel"]),
+      sessionHidden: map["sessionHidden"],
+      isHost: map["ishost"],
+      broadcastKey: map["broadcastKey"],
+    );
+  }
+
+  Map toMap() {
+    return {
+      "sessionHash": sessionHash,
+      "accessLevel": toBeginningOfSentenceCase(accessLevel.name),
+      "sessionHidden": sessionHidden,
+      "isHost": isHost,
+      "broadcastKey": broadcastKey,
+    };
+  }
+}

lib/models/users/user_status.dart

@@ -1,5 +1,9 @@
-import 'package:contacts_plus_plus/models/session.dart';
+import 'dart:convert';
+
+import 'package:contacts_plus_plus/crypto_helper.dart';
+import 'package:contacts_plus_plus/models/session_metadata.dart';
 import 'package:contacts_plus_plus/models/users/online_status.dart';
+import 'package:crypto/crypto.dart';
 
 class UserStatus {
   final OnlineStatus onlineStatus;
@@ -7,39 +11,48 @@ class UserStatus {
   final int currentSessionAccessLevel;
   final bool currentSessionHidden;
   final bool currentHosting;
-  final Session currentSession;
+  final int currentSessionIndex;
-  final List<Session> activeSessions;
+  final List<SessionMetadata> sessions;
   final String appVersion;
   final String outputDevice;
   final bool isMobile;
   final String compatibilityHash;
+  final String hashSalt;
 
   const UserStatus({
     required this.onlineStatus,
     required this.lastStatusChange,
-    required this.currentSession,
+    required this.currentSessionIndex,
     required this.currentSessionAccessLevel,
     required this.currentSessionHidden,
     required this.currentHosting,
-    required this.activeSessions,
+    required this.sessions,
     required this.appVersion,
     required this.outputDevice,
     required this.isMobile,
     required this.compatibilityHash,
+    required this.hashSalt,
   });
 
+  factory UserStatus.initial() => UserStatus.empty().copyWith(
+        onlineStatus: OnlineStatus.online,
+        hashSalt: CryptoHelper.cryptoToken(),
+        outputDevice: "Mobile",
+      );
+
   factory UserStatus.empty() => UserStatus(
         onlineStatus: OnlineStatus.offline,
         lastStatusChange: DateTime.now(),
         currentSessionAccessLevel: 0,
         currentSessionHidden: false,
         currentHosting: false,
-        currentSession: Session.none(),
+        currentSessionIndex: -1,
-        activeSessions: [],
+        sessions: [],
         appVersion: "",
         outputDevice: "Unknown",
         isMobile: false,
         compatibilityHash: "",
+        hashSalt: "",
       );
 
   factory UserStatus.fromMap(Map map) {
@@ -51,12 +64,14 @@ class UserStatus {
       currentSessionAccessLevel: map["currentSessionAccessLevel"] ?? 0,
       currentSessionHidden: map["currentSessionHidden"] ?? false,
       currentHosting: map["currentHosting"] ?? false,
-        currentSession: Session.fromMap(map["currentSession"]),
+      currentSessionIndex: map["currentSessionIndex"] ?? -1,
-        activeSessions: (map["activeSessions"] as List? ?? []).map((e) => Session.fromMap(e)).toList(),
+      sessions: (map["sessions"] as List? ?? []).map((e) => SessionMetadata.fromMap(e)).toList(),
       appVersion: map["appVersion"] ?? "",
       outputDevice: map["outputDevice"] ?? "Unknown",
       isMobile: map["isMobile"] ?? false,
-        compatibilityHash: map["compatabilityHash"] ?? "");
+      compatibilityHash: map["compatabilityHash"] ?? "",
+      hashSalt: map["hashSalt"] ?? "",
+    );
   }
 
   Map toMap({bool shallow = false}) {
@@ -66,10 +81,10 @@ class UserStatus {
       "currentSessionAccessLevel": currentSessionAccessLevel,
       "currentSessionHidden": currentSessionHidden,
       "currentHosting": currentHosting,
-      "currentSession": currentSession.isNone || shallow ? null : currentSession.toMap(),
+      "currentSessionIndex": currentSessionIndex,
-      "activeSessions": shallow
+      "sessions": shallow
           ? []
-          : activeSessions
+          : sessions
               .map(
                 (e) => e.toMap(),
               )
@@ -87,12 +102,13 @@ class UserStatus {
     int? currentSessionAccessLevel,
     bool? currentSessionHidden,
     bool? currentHosting,
-    Session? currentSession,
+    int? currentSessionIndex,
-    List<Session>? activeSessions,
+    List<SessionMetadata>? sessions,
     String? appVersion,
     String? outputDevice,
     bool? isMobile,
     String? compatibilityHash,
+    String? hashSalt,
   }) =>
       UserStatus(
         onlineStatus: onlineStatus ?? this.onlineStatus,
@@ -100,11 +116,12 @@ class UserStatus {
         currentSessionAccessLevel: currentSessionAccessLevel ?? this.currentSessionAccessLevel,
         currentSessionHidden: currentSessionHidden ?? this.currentSessionHidden,
         currentHosting: currentHosting ?? this.currentHosting,
-        currentSession: currentSession ?? this.currentSession,
+        currentSessionIndex: currentSessionIndex ?? this.currentSessionIndex,
-        activeSessions: activeSessions ?? this.activeSessions,
+        sessions: sessions ?? this.sessions,
         appVersion: appVersion ?? this.appVersion,
         outputDevice: outputDevice ?? this.outputDevice,
         isMobile: isMobile ?? this.isMobile,
         compatibilityHash: compatibilityHash ?? this.compatibilityHash,
+        hashSalt: hashSalt ?? this.hashSalt,
       );
 }

lib/widgets/friends/friend_list_tile.dart

@@ -1,3 +1,5 @@
+import 'dart:math';
+
 import 'package:contacts_plus_plus/auxiliary.dart';
 import 'package:contacts_plus_plus/clients/messaging_client.dart';
 import 'package:contacts_plus_plus/models/users/friend.dart';
@@ -21,6 +23,9 @@ class FriendListTile extends StatelessWidget {
   Widget build(BuildContext context) {
     final imageUri = Aux.resdbToHttp(friend.userProfile.iconUrl);
     final theme = Theme.of(context);
+    final mClient = Provider.of<MessagingClient>(context, listen: false);
+    final currentSessionMetadata = friend.userStatus.sessions.elementAtOrNull(max(0, friend.userStatus.currentSessionIndex));
+    final currentSession = mClient.getSessionInfo(currentSessionMetadata?.sessionHash ?? "");
     return ListTile(
       leading: GenericAvatar(
         imageUri: imageUri,
@@ -54,11 +59,11 @@ class FriendListTile extends StatelessWidget {
             width: 4,
           ),
           Text(toBeginningOfSentenceCase(friend.userStatus.onlineStatus.name) ?? "Unknown"),
-          if (!friend.userStatus.currentSession.isNone) ...[
+          if (currentSession != null) ...[
             const Text(" in "),
             Expanded(
                 child: FormattedText(
-              friend.userStatus.currentSession.formattedName,
+              currentSession.formattedName,
               overflow: TextOverflow.ellipsis,
               maxLines: 1,
             ))
@@ -67,7 +72,6 @@ class FriendListTile extends StatelessWidget {
       ),
       onTap: () async {
         onTap?.call();
-        final mClient = Provider.of<MessagingClient>(context, listen: false);
         mClient.loadUserMessageCache(friend.id);
         final unreads = mClient.getUnreadsForFriend(friend);
         if (unreads.isNotEmpty) {

lib/widgets/messages/messages_list.dart

@@ -6,7 +6,6 @@ import 'package:contacts_plus_plus/widgets/friends/friend_online_status_indicato
 import 'package:contacts_plus_plus/widgets/messages/message_input_bar.dart';
 import 'package:contacts_plus_plus/widgets/messages/messages_session_header.dart';
 import 'package:flutter/material.dart';
-import 'package:flutter/services.dart';
 import 'package:provider/provider.dart';
 
 import 'message_bubble.dart';
@@ -57,7 +56,7 @@ class _MessagesListState extends State<MessagesList> with SingleTickerProviderSt
     return Consumer<MessagingClient>(builder: (context, mClient, _) {
       final friend = mClient.selectedFriend ?? Friend.empty();
       final cache = mClient.getUserMessageCache(friend.id);
-      final sessions = friend.userStatus.activeSessions;
+      final sessions = friend.userStatus.sessions;
       return Scaffold(
         appBar: AppBar(
           title: Row(
@@ -121,7 +120,12 @@ class _MessagesListState extends State<MessagesList> with SingleTickerProviderSt
                               controller: _sessionListScrollController,
                               scrollDirection: Axis.horizontal,
                               itemCount: sessions.length,
-                              itemBuilder: (context, index) => SessionTile(session: sessions[index]),
+                              itemBuilder: (context, index) {
+                                final currentSessionMetadata = sessions[index];
+                                final currentSession = mClient.getSessionInfo(currentSessionMetadata.sessionHash);
+                                if (currentSession == null) return null;
+                                return SessionTile(session: currentSession);
+                              },
                             ),
                             AnimatedOpacity(
                               opacity: _shevronOpacity,

lib/widgets/messages/messages_session_header.dart

@@ -6,128 +6,6 @@ import 'package:contacts_plus_plus/widgets/generic_avatar.dart';
 import 'package:contacts_plus_plus/widgets/sessions/session_view.dart';
 import 'package:flutter/material.dart';
 
-class SessionPopup extends StatelessWidget {
-  const SessionPopup({required this.session, super.key});
-
-  final Session session;
-
-  @override
-  Widget build(BuildContext context) {
-    final ScrollController userListScrollController = ScrollController();
-    final thumbnailUri = Aux.resdbToHttp(session.thumbnailUrl);
-    return Dialog(
-      insetPadding: const EdgeInsets.all(32),
-      child: Container(
-        constraints: const BoxConstraints(maxHeight: 400),
-        padding: const EdgeInsets.all(24),
-        child: Column(
-          mainAxisSize: MainAxisSize.min,
-          children: [
-            Expanded(
-              child: Row(
-                mainAxisSize: MainAxisSize.min,
-                crossAxisAlignment: CrossAxisAlignment.start,
-                mainAxisAlignment: MainAxisAlignment.spaceBetween,
-                children: [
-                  Expanded(
-                    child: ListView(
-                      children: [
-                        FormattedText(session.formattedName, style: Theme.of(context).textTheme.titleMedium),
-                        session.formattedDescription.isEmpty
-                            ? const Text("No description")
-                            : FormattedText(session.formattedDescription,
-                                style: Theme.of(context).textTheme.labelMedium),
-                        Text(
-                          "Tags: ${session.tags.isEmpty ? "None" : session.tags.join(", ")}",
-                          style: Theme.of(context).textTheme.labelMedium,
-                          softWrap: true,
-                        ),
-                        Text("Access: ${session.accessLevel.toReadableString()}",
-                            style: Theme.of(context).textTheme.labelMedium),
-                        Text("Users: ${session.sessionUsers.length}", style: Theme.of(context).textTheme.labelMedium),
-                        Text("Maximum users: ${session.maxUsers}", style: Theme.of(context).textTheme.labelMedium),
-                        Text("Headless: ${session.headlessHost ? "Yes" : "No"}",
-                            style: Theme.of(context).textTheme.labelMedium),
-                      ],
-                    ),
-                  ),
-                  if (session.sessionUsers.isNotEmpty)
-                    Expanded(
-                      child: Scrollbar(
-                        trackVisibility: true,
-                        controller: userListScrollController,
-                        thumbVisibility: true,
-                        child: ListView.builder(
-                          controller: userListScrollController,
-                          shrinkWrap: true,
-                          itemCount: session.sessionUsers.length,
-                          itemBuilder: (context, index) {
-                            final user = session.sessionUsers[index];
-                            return ListTile(
-                              dense: true,
-                              title: Text(
-                                user.username,
-                                textAlign: TextAlign.end,
-                              ),
-                              subtitle: Text(
-                                user.isPresent ? "Active" : "Inactive",
-                                textAlign: TextAlign.end,
-                              ),
-                            );
-                          },
-                        ),
-                      ),
-                    )
-                  else
-                    const Expanded(
-                      child: Center(
-                        child: Column(
-                          mainAxisSize: MainAxisSize.min,
-                          children: [
-                            Icon(Icons.person_remove_alt_1_rounded),
-                            Padding(
-                              padding: EdgeInsets.all(16.0),
-                              child: Text(
-                                "No one is currently playing.",
-                                textAlign: TextAlign.center,
-                              ),
-                            )
-                          ],
-                        ),
-                      ),
-                    ),
-                ],
-              ),
-            ),
-            Expanded(
-              child: Center(
-                child: CachedNetworkImage(
-                  imageUrl: thumbnailUri,
-                  placeholder: (context, url) {
-                    return const CircularProgressIndicator();
-                  },
-                  errorWidget: (context, error, what) => const Column(
-                    mainAxisSize: MainAxisSize.max,
-                    crossAxisAlignment: CrossAxisAlignment.center,
-                    mainAxisAlignment: MainAxisAlignment.center,
-                    children: [
-                      Icon(Icons.no_photography),
-                      Padding(
-                        padding: EdgeInsets.all(16.0),
-                        child: Text("Failed to load Image"),
-                      )
-                    ],
-                  ),
-                ),
-              ),
-            )
-          ],
-        ),
-      ),
-    );
-  }
-}
-
 class SessionTile extends StatelessWidget {
   const SessionTile({required this.session, super.key});