add flame counter test

lib/src/database/daos/contacts.dao.dart

@@ -99,7 +99,7 @@ class ContactsDao extends DatabaseAccessor<TwonlyDB> with _$ContactsDaoMixin {
         .watchSingleOrNull();
   }
 
-  Future<List<Contact>> getAllNotBlockedContacts() {
+  Future<List<Contact>> getAllContacts() {
     return select(contacts).get();
   }
 

lib/src/database/daos/groups.dao.dart

@@ -3,6 +3,7 @@ import 'package:hashlib/random.dart';
 import 'package:twonly/globals.dart';
 import 'package:twonly/src/database/tables/groups.table.dart';
 import 'package:twonly/src/database/twonly.db.dart';
+import 'package:twonly/src/services/flame.service.dart';
 import 'package:twonly/src/utils/log.dart';
 import 'package:twonly/src/utils/misc.dart';
 
@@ -278,89 +279,6 @@ class GroupsDao extends DatabaseAccessor<TwonlyDB> with _$GroupsDaoMixin {
     return query.map((row) => row.readTable(groups)).getSingleOrNull();
   }
 
-  Future<void> incFlameCounter(
-    String groupId,
-    bool received,
-    DateTime timestamp,
-  ) async {
-    final group = await (select(groups)
-          ..where((t) => t.groupId.equals(groupId)))
-        .getSingle();
-
-    final totalMediaCounter = group.totalMediaCounter + 1;
-    var flameCounter = group.flameCounter;
-    var maxFlameCounter = group.maxFlameCounter;
-    var maxFlameCounterFrom = group.maxFlameCounterFrom;
-
-    if (group.lastMessageReceived != null && group.lastMessageSend != null) {
-      final now = DateTime.now();
-      final startOfToday = DateTime(now.year, now.month, now.day);
-      final twoDaysAgo = startOfToday.subtract(const Duration(days: 2));
-      if (group.lastMessageSend!.isBefore(twoDaysAgo) ||
-          group.lastMessageReceived!.isBefore(twoDaysAgo)) {
-        flameCounter = 0;
-      }
-    }
-
-    var lastMessageSend = const Value<DateTime?>.absent();
-    var lastMessageReceived = const Value<DateTime?>.absent();
-    var lastFlameCounterChange = const Value<DateTime?>.absent();
-
-    if (group.lastFlameCounterChange != null) {
-      final now = DateTime.now();
-      final startOfToday = DateTime(now.year, now.month, now.day);
-
-      if (group.lastFlameCounterChange!.isBefore(startOfToday)) {
-        // last flame update was yesterday. check if it can be updated.
-        var updateFlame = false;
-        if (received) {
-          if (group.lastMessageSend != null &&
-              group.lastMessageSend!.isAfter(startOfToday)) {
-            // today a message was already send -> update flame
-            updateFlame = true;
-          }
-        } else if (group.lastMessageReceived != null &&
-            group.lastMessageReceived!.isAfter(startOfToday)) {
-          // today a message was already received -> update flame
-          updateFlame = true;
-        }
-        if (updateFlame) {
-          flameCounter += 1;
-          lastFlameCounterChange = Value(timestamp);
-          // Overwrite max flame counter either the current is bigger or the th max flame counter is older then 4 days
-          if (flameCounter >= maxFlameCounter ||
-              maxFlameCounterFrom == null ||
-              maxFlameCounterFrom
-                  .isBefore(DateTime.now().subtract(const Duration(days: 5)))) {
-            maxFlameCounter = flameCounter;
-            maxFlameCounterFrom = DateTime.now();
-          }
-        }
-      }
-    } else {
-      // There where no message until no...
-      lastFlameCounterChange = Value(timestamp);
-    }
-
-    if (received) {
-      lastMessageReceived = Value(timestamp);
-    } else {
-      lastMessageSend = Value(timestamp);
-    }
-
-    await (update(groups)..where((t) => t.groupId.equals(groupId))).write(
-      GroupsCompanion(
-        totalMediaCounter: Value(totalMediaCounter),
-        lastFlameCounterChange: lastFlameCounterChange,
-        lastMessageReceived: lastMessageReceived,
-        lastMessageSend: lastMessageSend,
-        flameCounter: Value(flameCounter),
-        maxFlameCounter: Value(maxFlameCounter),
-        maxFlameCounterFrom: Value(maxFlameCounterFrom),
-      ),
-    );
-  }
-
   Stream<int> watchSumTotalMediaCounter() {
     final query = selectOnly(groups)
       ..addColumns([groups.totalMediaCounter.sum()]);
@@ -383,23 +301,3 @@ class GroupsDao extends DatabaseAccessor<TwonlyDB> with _$GroupsDaoMixin {
         .write(GroupsCompanion(lastMessageExchange: Value(newLastMessage)));
   }
 }
-
-int getFlameCounterFromGroup(Group? group) {
-  if (group == null) return 0;
-  if (group.lastMessageSend == null ||
-      group.lastMessageReceived == null ||
-      group.lastFlameCounterChange == null) {
-    return 0;
-  }
-  final now = DateTime.now();
-  final startOfToday = DateTime(now.year, now.month, now.day);
-  final twoDaysAgo = startOfToday.subtract(const Duration(days: 2));
-  final oneDayAgo = startOfToday.subtract(const Duration(days: 1));
-  if (group.lastMessageSend!.isAfter(twoDaysAgo) &&
-          group.lastMessageReceived!.isAfter(twoDaysAgo) ||
-      group.lastFlameCounterChange!.isAfter(oneDayAgo)) {
-    return group.flameCounter + 1;
-  } else {
-    return 0;
-  }
-}

lib/src/database/daos/messages.dao.dart

@@ -1,3 +1,4 @@
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart';
 import 'package:hashlib/random.dart';
 import 'package:twonly/globals.dart';
@@ -110,7 +111,7 @@ class MessagesDao extends DatabaseAccessor<TwonlyDB> with _$MessagesDaoMixin {
     final allGroups = await select(groups).get();
 
     for (final group in allGroups) {
-      final deletionTime = DateTime.now().subtract(
+      final deletionTime = clock.now().subtract(
             Duration(
               milliseconds: group.deleteMessagesAfterMilliseconds,
             ),
@@ -150,7 +151,7 @@ class MessagesDao extends DatabaseAccessor<TwonlyDB> with _$MessagesDaoMixin {
   //               t.messageOtherId.isNull() &
   //               t.errorWhileSending.equals(false) &
   //               t.sendAt.isBiggerThanValue(
-  //                 DateTime.now().subtract(const Duration(minutes: 10)),
+  //                 clock.now().subtract(const Duration(minutes: 10)),
   //               ),
   //         ))
   //       .get();
@@ -178,7 +179,7 @@ class MessagesDao extends DatabaseAccessor<TwonlyDB> with _$MessagesDaoMixin {
   // }
 
   Future<void> openedAllTextMessages(String groupId) {
-    final updates = MessagesCompanion(openedAt: Value(DateTime.now()));
+    final updates = MessagesCompanion(openedAt: Value(clock.now()));
     return (update(messages)
           ..where(
             (t) =>
@@ -272,12 +273,12 @@ class MessagesDao extends DatabaseAccessor<TwonlyDB> with _$MessagesDaoMixin {
     // Directly show as message opened as soon as one person has opened it
     final openedByAll =
         await haveAllMembers(messageId, MessageActionType.openedAt)
-            ? DateTime.now()
+            ? clock.now()
             : null;
     await twonlyDB.messagesDao.updateMessageId(
       messageId,
       MessagesCompanion(
-        openedAt: Value(DateTime.now()),
+        openedAt: Value(clock.now()),
         openedByAll: Value(openedByAll),
       ),
     );
@@ -298,7 +299,7 @@ class MessagesDao extends DatabaseAccessor<TwonlyDB> with _$MessagesDaoMixin {
     );
     await twonlyDB.messagesDao.updateMessageId(
       messageId,
-      MessagesCompanion(ackByServer: Value(DateTime.now())),
+      MessagesCompanion(ackByServer: Value(clock.now())),
     );
   }
 
@@ -378,7 +379,7 @@ class MessagesDao extends DatabaseAccessor<TwonlyDB> with _$MessagesDaoMixin {
       await twonlyDB.groupsDao.updateGroup(
         message.groupId.value,
         GroupsCompanion(
-          lastMessageExchange: Value(DateTime.now()),
+          lastMessageExchange: Value(clock.now()),
           archived: const Value(false),
           deletedContent: const Value(false),
         ),
@@ -389,7 +390,7 @@ class MessagesDao extends DatabaseAccessor<TwonlyDB> with _$MessagesDaoMixin {
           message.groupId.value,
           message.senderId.value!,
           GroupMembersCompanion(
-            lastMessage: Value(DateTime.now()),
+            lastMessage: Value(clock.now()),
           ),
         );
       }

lib/src/database/daos/receipts.dao.dart

@@ -1,3 +1,4 @@
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart';
 import 'package:hashlib/random.dart';
 import 'package:twonly/src/database/tables/messages.table.dart';
@@ -81,7 +82,7 @@ class ReceiptsDao extends DatabaseAccessor<TwonlyDB> with _$ReceiptsDaoMixin {
   }
 
   Future<List<Receipt>> getReceiptsForRetransmission() async {
-    final markedRetriesTime = DateTime.now().subtract(
+    final markedRetriesTime = clock.now().subtract(
           const Duration(
             // give the server time to transmit all messages to the client
             seconds: 20,
@@ -111,7 +112,7 @@ class ReceiptsDao extends DatabaseAccessor<TwonlyDB> with _$ReceiptsDaoMixin {
   Future<void> markMessagesForRetry(int contactId) async {
     await (update(receipts)..where((c) => c.contactId.equals(contactId))).write(
       ReceiptsCompanion(
-        markForRetry: Value(DateTime.now()),
+        markForRetry: Value(clock.now()),
       ),
     );
   }

lib/src/database/daos/signal.dao.dart

@@ -1,3 +1,4 @@
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart';
 import 'package:twonly/globals.dart';
 import 'package:twonly/src/database/tables/signal_contact_prekey.table.dart';
@@ -107,7 +108,7 @@ class SignalDao extends DatabaseAccessor<TwonlyDB> with _$SignalDaoMixin {
     await (delete(signalContactPreKeys)
           ..where(
             (t) => (t.createdAt.isSmallerThanValue(
-              DateTime.now().subtract(
+              clock.now().subtract(
                     const Duration(days: 100),
                   ),
             )),
@@ -117,7 +118,7 @@ class SignalDao extends DatabaseAccessor<TwonlyDB> with _$SignalDaoMixin {
     await (delete(twonlyDB.signalPreKeyStores)
           ..where(
             (t) => (t.createdAt.isSmallerThanValue(
-              DateTime.now().subtract(
+              clock.now().subtract(
                     const Duration(days: 365),
                   ),
             )),

lib/src/database/twonly.db.dart

@@ -1,3 +1,4 @@
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart';
 import 'package:drift_flutter/drift_flutter.dart'
     show DriftNativeOptions, driftDatabase;
@@ -160,7 +161,7 @@ class TwonlyDB extends _$TwonlyDB {
     await (delete(signalPreKeyStores)
           ..where(
             (t) => (t.createdAt.isSmallerThanValue(
-              DateTime.now().subtract(
+              clock.now().subtract(
                     const Duration(days: 25),
                   ),
             )),

lib/src/database/twonly_database_old.dart

@@ -1,3 +1,4 @@
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart';
 import 'package:drift_flutter/drift_flutter.dart'
     show DriftNativeOptions, driftDatabase;
@@ -191,7 +192,7 @@ class TwonlyDatabaseOld extends _$TwonlyDatabaseOld {
     await (delete(signalPreKeyStores)
           ..where(
             (t) => (t.createdAt.isSmallerThanValue(
-              DateTime.now().subtract(
+              clock.now().subtract(
                     const Duration(days: 25),
                   ),
             )),

lib/src/services/api.service.dart

@@ -7,6 +7,7 @@ import 'dart:io';
 import 'dart:math';
 import 'dart:ui' as ui;
 
+import 'package:clock/clock.dart';
 import 'package:connectivity_plus/connectivity_plus.dart';
 import 'package:drift/drift.dart';
 import 'package:fixnum/fixnum.dart';
@@ -206,7 +207,7 @@ class ApiService {
   }
 
   Future<server.ServerToClient?> _waitForResponse(Int64 seq) async {
-    final startTime = DateTime.now();
+    final startTime = clock.now();
 
     const timeout = Duration(seconds: 60);
 
@@ -216,7 +217,7 @@ class ApiService {
         messagesV0.remove(seq);
         return tmp;
       }
-      if (DateTime.now().difference(startTime) > timeout) {
+      if (clock.now().difference(startTime) > timeout) {
         Log.warn('Timeout for message $seq');
         return null;
       }

lib/src/services/api/client2client/media.c2c.dart

@@ -7,6 +7,7 @@ import 'package:twonly/src/database/twonly.db.dart';
 import 'package:twonly/src/model/protobuf/client/generated/messages.pb.dart';
 import 'package:twonly/src/services/api/mediafiles/download.service.dart';
 import 'package:twonly/src/services/api/utils.dart';
+import 'package:twonly/src/services/flame.service.dart';
 import 'package:twonly/src/services/mediafiles/mediafile.service.dart';
 import 'package:twonly/src/utils/log.dart';
 
@@ -114,7 +115,7 @@ Future<void> handleMedia(
     await twonlyDB.groupsDao
         .increaseLastMessageExchange(groupId, fromTimestamp(media.timestamp));
     Log.info('Inserted a new media message with ID: ${message.messageId}');
-    await twonlyDB.groupsDao.incFlameCounter(
+    await incFlameCounter(
       message.groupId,
       true,
       fromTimestamp(media.timestamp),

lib/src/services/api/client2client/pushkeys.c2c.dart

@@ -1,10 +1,11 @@
 import 'dart:async';
 
+import 'package:clock/clock.dart';
 import 'package:twonly/src/model/protobuf/client/generated/messages.pb.dart';
 import 'package:twonly/src/services/notifications/pushkeys.notifications.dart';
 import 'package:twonly/src/utils/log.dart';
 
-DateTime lastPushKeyRequest = DateTime.now().subtract(const Duration(hours: 1));
+DateTime lastPushKeyRequest = clock.now().subtract(const Duration(hours: 1));
 
 Future<void> handlePushKey(
   int contactId,
@@ -14,8 +15,8 @@ Future<void> handlePushKey(
     case EncryptedContent_PushKeys_Type.REQUEST:
       Log.info('Got a pushkey request from $contactId');
       if (lastPushKeyRequest
-          .isBefore(DateTime.now().subtract(const Duration(seconds: 60)))) {
+          .isBefore(clock.now().subtract(const Duration(seconds: 60)))) {
-        lastPushKeyRequest = DateTime.now();
+        lastPushKeyRequest = clock.now();
         unawaited(setupNotificationWithUsers(forceContact: contactId));
       }
 

lib/src/services/api/client2client/reaction.c2c.dart

@@ -1,3 +1,4 @@
+import 'package:clock/clock.dart';
 import 'package:twonly/globals.dart';
 import 'package:twonly/src/model/protobuf/client/generated/messages.pb.dart';
 import 'package:twonly/src/utils/log.dart';
@@ -17,7 +18,6 @@ Future<void> handleReaction(
   );
 
   if (!reaction.remove) {
-    await twonlyDB.groupsDao
+    await twonlyDB.groupsDao.increaseLastMessageExchange(groupId, clock.now());
-        .increaseLastMessageExchange(groupId, DateTime.now());
   }
 }

lib/src/services/api/client2client/text_message.c2c.dart

@@ -1,3 +1,4 @@
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart';
 import 'package:twonly/globals.dart';
 import 'package:twonly/src/database/tables/messages.table.dart';
@@ -26,7 +27,7 @@ Future<void> handleTextMessage(
         textMessage.hasQuoteMessageId() ? textMessage.quoteMessageId : null,
       ),
       createdAt: Value(fromTimestamp(textMessage.timestamp)),
-      ackByServer: Value(DateTime.now()),
+      ackByServer: Value(clock.now()),
     ),
   );
   await twonlyDB.groupsDao.increaseLastMessageExchange(

lib/src/services/api/mediafiles/media_background.service.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'package:background_downloader/background_downloader.dart';
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart' show Value;
 import 'package:flutter/foundation.dart';
 import 'package:twonly/globals.dart';
@@ -92,7 +93,7 @@ Future<void> handleUploadStatusUpdate(TaskStatusUpdate update) async {
           await twonlyDB.messagesDao.handleMessageAckByServer(
             contact.contactId,
             message.messageId,
-            DateTime.now(),
+            clock.now(),
           );
         }
       }

lib/src/services/api/mediafiles/upload.service.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 import 'package:background_downloader/background_downloader.dart';
+import 'package:clock/clock.dart';
 import 'package:connectivity_plus/connectivity_plus.dart';
 import 'package:cryptography_flutter_plus/cryptography_flutter_plus.dart';
 import 'package:cryptography_plus/cryptography_plus.dart';
@@ -18,6 +19,7 @@ import 'package:twonly/src/model/protobuf/api/http/http_requests.pb.dart';
 import 'package:twonly/src/model/protobuf/client/generated/messages.pb.dart';
 import 'package:twonly/src/services/api/mediafiles/media_background.service.dart';
 import 'package:twonly/src/services/api/messages.dart';
+import 'package:twonly/src/services/flame.service.dart';
 import 'package:twonly/src/services/mediafiles/mediafile.service.dart';
 import 'package:twonly/src/utils/log.dart';
 import 'package:twonly/src/utils/misc.dart';
@@ -101,8 +103,7 @@ Future<void> insertMediaFileInMessagesTable(
         type: const Value(MessageType.media),
       ),
     );
-    await twonlyDB.groupsDao
+    await twonlyDB.groupsDao.increaseLastMessageExchange(groupId, clock.now());
-        .increaseLastMessageExchange(groupId, DateTime.now());
     if (message != null) {
       // de-archive contact when sending a new message
       await twonlyDB.groupsDao.updateGroup(
@@ -207,11 +208,7 @@ Future<void> _createUploadRequest(MediaFileService media) async {
         await twonlyDB.groupsDao.getGroupNonLeftMembers(message.groupId);
 
     if (media.mediaFile.reuploadRequestedBy == null) {
-      await twonlyDB.groupsDao.incFlameCounter(
+      await incFlameCounter(message.groupId, false, message.createdAt);
-        message.groupId,
-        false,
-        message.createdAt,
-      );
     }
 
     for (final groupMember in groupMembers) {

lib/src/services/api/messages.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart';
 import 'package:fixnum/fixnum.dart';
 import 'package:libsignal_protocol_dart/libsignal_protocol_dart.dart';
@@ -131,7 +132,7 @@ Future<(Uint8List, Uint8List?)?> tryToSendCompleteMessage({
         await twonlyDB.messagesDao.handleMessageAckByServer(
           receipt.contactId,
           receipt.messageId!,
-          DateTime.now(),
+          clock.now(),
         );
       }
       if (!receipt.contactWillSendsReceipt) {
@@ -140,9 +141,9 @@ Future<(Uint8List, Uint8List?)?> tryToSendCompleteMessage({
         await twonlyDB.receiptsDao.updateReceipt(
           receiptId,
           ReceiptsCompanion(
-            ackByServerAt: Value(DateTime.now()),
+            ackByServerAt: Value(clock.now()),
             retryCount: Value(receipt.retryCount + 1),
-            lastRetry: Value(DateTime.now()),
+            lastRetry: Value(clock.now()),
             markForRetry: const Value(null),
           ),
         );
@@ -210,7 +211,7 @@ Future<void> sendCipherTextToGroup(
 }) async {
   final groupMembers = await twonlyDB.groupsDao.getGroupNonLeftMembers(groupId);
 
-  await twonlyDB.groupsDao.increaseLastMessageExchange(groupId, DateTime.now());
+  await twonlyDB.groupsDao.increaseLastMessageExchange(groupId, clock.now());
 
   encryptedContent.groupId = groupId;
 
@@ -242,7 +243,7 @@ Future<(Uint8List, Uint8List?)?> sendCipherText(
       contactId: Value(contactId),
       message: Value(response.writeToBuffer()),
       messageId: Value(messageId),
-      ackByServerAt: Value(onlyReturnEncryptedData ? DateTime.now() : null),
+      ackByServerAt: Value(onlyReturnEncryptedData ? clock.now() : null),
     ),
   );
 
@@ -268,7 +269,7 @@ Future<void> notifyContactAboutOpeningMessage(
   }
   Log.info('Opened messages: $messageOtherIds');
 
-  final actionAt = DateTime.now();
+  final actionAt = clock.now();
 
   await sendCipherText(
     contactId,

lib/src/services/api/server_messages.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:convert';
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart';
 import 'package:hashlib/random.dart';
 import 'package:mutex/mutex.dart';
@@ -60,7 +61,7 @@ Future<void> handleServerMessage(server.ServerToClient msg) async {
   await apiService.sendResponse(ClientToServer()..v0 = v0);
 }
 
-DateTime lastPushKeyRequest = DateTime.now().subtract(const Duration(hours: 1));
+DateTime lastPushKeyRequest = clock.now().subtract(const Duration(hours: 1));
 
 Mutex protectReceiptCheck = Mutex();
 

lib/src/services/flame.service.dart

@@ -1,8 +1,8 @@
+import 'package:clock/clock.dart';
 import 'package:collection/collection.dart';
 import 'package:drift/drift.dart';
 import 'package:fixnum/fixnum.dart';
 import 'package:twonly/globals.dart';
-import 'package:twonly/src/database/daos/groups.dao.dart';
 import 'package:twonly/src/database/twonly.db.dart';
 import 'package:twonly/src/model/protobuf/client/generated/messages.pb.dart';
 import 'package:twonly/src/services/api/messages.dart';
@@ -32,10 +32,10 @@ Future<void> syncFlameCounters({String? forceForGroup}) async {
       }
     }
 
-    final flameCounter = getFlameCounterFromGroup(group) - 1;
+    final flameCounter = getFlameCounterFromGroup(group);
 
-    // only sync when flame counter is higher than three days or when they are bestFriends
+    // only sync when flame counter is higher three or when they are bestFriends
-    if (flameCounter < 1 && bestFriend.groupId != group.groupId) continue;
+    if (flameCounter <= 2 && bestFriend.groupId != group.groupId) continue;
 
     final groupMembers =
         await twonlyDB.groupsDao.getGroupNonLeftMembers(group.groupId);
@@ -59,8 +59,125 @@ Future<void> syncFlameCounters({String? forceForGroup}) async {
     await twonlyDB.groupsDao.updateGroup(
       group.groupId,
       GroupsCompanion(
-        lastFlameSync: Value(DateTime.now()),
+        lastFlameSync: Value(clock.now()),
       ),
     );
   }
 }
+
+int getFlameCounterFromGroup(Group? group) {
+  if (group == null) return 0;
+  if (group.lastMessageSend == null ||
+      group.lastMessageReceived == null ||
+      group.lastFlameCounterChange == null) {
+    return 0;
+  }
+  final now = clock.now();
+  final startOfToday = DateTime(now.year, now.month, now.day);
+  final twoDaysAgo = startOfToday.subtract(const Duration(days: 2));
+  final oneDayAgo = startOfToday.subtract(const Duration(days: 1));
+  if (group.lastMessageSend!.isAfter(twoDaysAgo) &&
+          group.lastMessageReceived!.isAfter(twoDaysAgo) ||
+      group.lastFlameCounterChange!.isAfter(oneDayAgo)) {
+    return group.flameCounter;
+  } else {
+    return 0;
+  }
+}
+
+Future<void> incFlameCounter(
+  String groupId,
+  bool received,
+  DateTime timestamp,
+) async {
+  final group = await twonlyDB.groupsDao.getGroup(groupId);
+  if (group == null) return;
+
+  final totalMediaCounter = group.totalMediaCounter + 1;
+  var flameCounter = group.flameCounter;
+  var maxFlameCounter = group.maxFlameCounter;
+  var maxFlameCounterFrom = group.maxFlameCounterFrom;
+
+  if (group.lastMessageReceived != null && group.lastMessageSend != null) {
+    final now = clock.now();
+    final startOfToday = DateTime(now.year, now.month, now.day);
+    final twoDaysAgo = startOfToday.subtract(const Duration(days: 2));
+    if (group.lastMessageSend!.isBefore(twoDaysAgo) ||
+        group.lastMessageReceived!.isBefore(twoDaysAgo)) {
+      flameCounter = 0;
+    }
+  }
+
+  var lastMessageSend = const Value<DateTime?>.absent();
+  var lastMessageReceived = const Value<DateTime?>.absent();
+  var lastFlameCounterChange = const Value<DateTime?>.absent();
+
+  final now = clock.now();
+  final startOfToday = DateTime(now.year, now.month, now.day);
+
+  if (group.lastFlameCounterChange == null ||
+      group.lastFlameCounterChange!.isBefore(startOfToday)) {
+    // last flame update was yesterday. check if it can be updated.
+    var updateFlame = false;
+    if (received) {
+      if (group.lastMessageSend != null &&
+          group.lastMessageSend!.isAfter(startOfToday)) {
+        // today a message was already send -> update flame
+        updateFlame = true;
+      }
+    } else if (group.lastMessageReceived != null &&
+        group.lastMessageReceived!.isAfter(startOfToday)) {
+      // today a message was already received -> update flame
+      updateFlame = true;
+    }
+    if (updateFlame) {
+      flameCounter += 1;
+      if (group.lastFlameCounterChange == null ||
+          group.lastFlameCounterChange!.isBefore(timestamp)) {
+        // only update if the timestamp is newer
+        lastFlameCounterChange = Value(timestamp);
+      }
+      // Overwrite max flame counter either the current is bigger or the the max flame counter is older then 4 days
+      if (flameCounter >= maxFlameCounter ||
+          maxFlameCounterFrom == null ||
+          maxFlameCounterFrom
+              .isBefore(clock.now().subtract(const Duration(days: 5)))) {
+        maxFlameCounter = flameCounter;
+        maxFlameCounterFrom = clock.now();
+      }
+    }
+  }
+
+  if (received) {
+    if (group.lastMessageReceived == null ||
+        group.lastMessageReceived!.isBefore(timestamp)) {
+      lastMessageReceived = Value(timestamp);
+    }
+  } else {
+    if (group.lastMessageSend == null ||
+        group.lastMessageSend!.isBefore(timestamp)) {
+      lastMessageSend = Value(timestamp);
+    }
+  }
+
+  await twonlyDB.groupsDao.updateGroup(
+    groupId,
+    GroupsCompanion(
+      totalMediaCounter: Value(totalMediaCounter),
+      lastFlameCounterChange: lastFlameCounterChange,
+      lastMessageReceived: lastMessageReceived,
+      lastMessageSend: lastMessageSend,
+      flameCounter: Value(flameCounter),
+      maxFlameCounter: Value(maxFlameCounter),
+      maxFlameCounterFrom: Value(maxFlameCounterFrom),
+    ),
+  );
+}
+
+bool isItPossibleToRestoreFlames(Group group) {
+  final flameCounter = getFlameCounterFromGroup(group);
+  return group.maxFlameCounter > 2 &&
+      flameCounter < group.maxFlameCounter &&
+      group.maxFlameCounterFrom!
+          .isAfter(clock.now().subtract(const Duration(days: 5)));
+}

lib/src/services/group.services.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 import 'dart:math';
+import 'package:clock/clock.dart';
 import 'package:collection/collection.dart';
 import 'package:cryptography_flutter_plus/cryptography_flutter_plus.dart';
 import 'package:cryptography_plus/cryptography_plus.dart';
@@ -158,7 +159,7 @@ Future<void> fetchMissingGroupPublicKey() async {
     if (member.lastMessage == null) continue;
     // only request if the users has send a message in the last two days.
     if (member.lastMessage!
-        .isAfter(DateTime.now().subtract(const Duration(days: 2)))) {
+        .isAfter(clock.now().subtract(const Duration(days: 2)))) {
       await sendCipherText(
         member.contactId,
         EncryptedContent(

lib/src/services/mediafiles/mediafile.service.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:io';
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart';
 import 'package:path/path.dart';
 import 'package:twonly/globals.dart';
@@ -61,7 +62,7 @@ class MediaFileService {
             // delete = true; // do not overwrite a previous delete = false
             // this is just to make it easier to understand :)
           } else if (message.openedAt!
-              .isAfter(DateTime.now().subtract(const Duration(days: 2)))) {
+              .isAfter(clock.now().subtract(const Duration(days: 2)))) {
             // In case the image was opened, but send with unlimited time or no authentication.
             if (message.senderId == null) {
               delete = false;

lib/src/services/notifications/pushkeys.notifications.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:convert';
 import 'dart:math';
+import 'package:clock/clock.dart';
 import 'package:collection/collection.dart';
 import 'package:cryptography_flutter_plus/cryptography_flutter_plus.dart';
 import 'package:cryptography_plus/cryptography_plus.dart';
@@ -46,7 +47,7 @@ Future<void> setupNotificationWithUsers({
 
   final random = Random.secure();
 
-  final contacts = await twonlyDB.contactsDao.getAllNotBlockedContacts();
+  final contacts = await twonlyDB.contactsDao.getAllContacts();
   for (final contact in contacts) {
     final pushUser =
         pushUsers.firstWhereOrNull((x) => x.userId == contact.userId);
@@ -54,7 +55,7 @@ Future<void> setupNotificationWithUsers({
     if (pushUser != null && pushUser.pushKeys.isNotEmpty) {
       // make it harder to predict the change of the key
       final timeBefore =
-          DateTime.now().subtract(Duration(days: 5 + random.nextInt(5)));
+          clock.now().subtract(Duration(days: 10 + random.nextInt(5)));
       final lastKey = pushUser.pushKeys.last;
       final createdAt = DateTime.fromMillisecondsSinceEpoch(
         lastKey.createdAtUnixTimestamp.toInt(),
@@ -66,7 +67,7 @@ Future<void> setupNotificationWithUsers({
         final pushKey = PushKey(
           id: lastKey.id + random.nextInt(5),
           key: List<int>.generate(32, (index) => random.nextInt(256)),
-          createdAtUnixTimestamp: Int64(DateTime.now().millisecondsSinceEpoch),
+          createdAtUnixTimestamp: Int64(clock.now().millisecondsSinceEpoch),
         );
         await sendNewPushKey(contact.userId, pushKey);
         // only store a maximum of two keys
@@ -86,7 +87,7 @@ Future<void> setupNotificationWithUsers({
       final pushKey = PushKey(
         id: Int64(1),
         key: List<int>.generate(32, (index) => random.nextInt(256)),
-        createdAtUnixTimestamp: Int64(DateTime.now().millisecondsSinceEpoch),
+        createdAtUnixTimestamp: Int64(clock.now().millisecondsSinceEpoch),
       );
       await sendNewPushKey(contact.userId, pushKey);
       pushUsers.add(
@@ -173,7 +174,7 @@ Future<void> handleNewPushKey(int fromUserId, int keyId, List<int> key) async {
     PushKey(
       id: Int64(keyId),
       key: key,
-      createdAtUnixTimestamp: Int64(DateTime.now().millisecondsSinceEpoch),
+      createdAtUnixTimestamp: Int64(clock.now().millisecondsSinceEpoch),
     ),
   );
 
@@ -341,7 +342,7 @@ Future<Uint8List?> encryptPushNotification(
     final createdAt = DateTime.fromMillisecondsSinceEpoch(
       pushUser.pushKeys.last.createdAtUnixTimestamp.toInt(),
     );
-    final timeBefore = DateTime.now().subtract(const Duration(days: 8));
+    final timeBefore = clock.now().subtract(const Duration(days: 8));
     if (createdAt.isBefore(timeBefore)) {
       await requestNewPushKeysForUser(toUserId);
     }

lib/src/services/signal/identity.signal.dart

@@ -1,5 +1,5 @@
 import 'dart:convert';
-
+import 'package:clock/clock.dart';
 import 'package:flutter_secure_storage/flutter_secure_storage.dart';
 import 'package:libsignal_protocol_dart/libsignal_protocol_dart.dart';
 import 'package:twonly/globals.dart';
@@ -21,8 +21,7 @@ Future<IdentityKeyPair?> getSignalIdentityKeyPair() async {
 // It then checks if it should update a new session key
 Future<void> signalHandleNewServerConnection() async {
   if (gUser.signalLastSignedPreKeyUpdated != null) {
-    final fortyEightHoursAgo =
+    final fortyEightHoursAgo = clock.now().subtract(const Duration(hours: 48));
-        DateTime.now().subtract(const Duration(hours: 48));
     final isYoungerThan48Hours =
         (gUser.signalLastSignedPreKeyUpdated!).isAfter(fortyEightHoursAgo);
     if (isYoungerThan48Hours) {
@@ -36,7 +35,7 @@ Future<void> signalHandleNewServerConnection() async {
     return;
   }
   await updateUserdata((user) {
-    user.signalLastSignedPreKeyUpdated = DateTime.now();
+    user.signalLastSignedPreKeyUpdated = clock.now();
     return user;
   });
   final res = await apiService.updateSignedPreKey(

lib/src/services/signal/prekeys.signal.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart';
 import 'package:mutex/mutex.dart';
 import 'package:twonly/globals.dart';
@@ -22,17 +23,17 @@ class OtherPreKeys {
 }
 
 Mutex requestNewKeys = Mutex();
-DateTime lastPreKeyRequest = DateTime.now().subtract(const Duration(hours: 1));
+DateTime lastPreKeyRequest = clock.now().subtract(const Duration(hours: 1));
 DateTime lastSignedPreKeyRequest =
-    DateTime.now().subtract(const Duration(hours: 1));
+    clock.now().subtract(const Duration(hours: 1));
 
 Future<void> requestNewPrekeysForContact(int contactId) async {
   if (lastPreKeyRequest
-      .isAfter(DateTime.now().subtract(const Duration(seconds: 60)))) {
+      .isAfter(clock.now().subtract(const Duration(seconds: 60)))) {
     return;
   }
   Log.info('[PREKEY] Requesting new PREKEYS for $contactId');
-  lastPreKeyRequest = DateTime.now();
+  lastPreKeyRequest = clock.now();
   await requestNewKeys.protect(() async {
     final otherKeys = await apiService.getPreKeysByUserId(contactId);
     if (otherKeys != null) {
@@ -65,11 +66,11 @@ Future<SignalContactPreKey?> getPreKeyByContactId(int contactId) async {
 
 Future<void> requestNewSignedPreKeyForContact(int contactId) async {
   if (lastSignedPreKeyRequest
-      .isAfter(DateTime.now().subtract(const Duration(seconds: 60)))) {
+      .isAfter(clock.now().subtract(const Duration(seconds: 60)))) {
     Log.info('last signed pre request was 60s before');
     return;
   }
-  lastSignedPreKeyRequest = DateTime.now();
+  lastSignedPreKeyRequest = clock.now();
   await requestNewKeys.protect(() async {
     final signedPreKey = await apiService.getSignedKeyByUserId(contactId);
     if (signedPreKey != null) {
@@ -96,8 +97,7 @@ Future<SignalContactSignedPreKey?> getSignedPreKeyByContactId(
       await twonlyDB.signalDao.getSignedPreKeyByContactId(contactId);
 
   if (signedPreKey != null) {
-    final fortyEightHoursAgo =
+    final fortyEightHoursAgo = clock.now().subtract(const Duration(hours: 48));
-        DateTime.now().subtract(const Duration(hours: 48));
     final isOlderThan48Hours =
         signedPreKey.createdAt.isBefore(fortyEightHoursAgo);
     if (isOlderThan48Hours) {

lib/src/services/twonly_safe/create_backup.twonly_safe.dart

@@ -3,6 +3,7 @@
 import 'dart:convert';
 import 'dart:io';
 import 'package:background_downloader/background_downloader.dart';
+import 'package:clock/clock.dart';
 import 'package:cryptography_flutter_plus/cryptography_flutter_plus.dart';
 import 'package:cryptography_plus/cryptography_plus.dart';
 import 'package:drift/drift.dart';
@@ -34,8 +35,7 @@ Future<void> performTwonlySafeBackup({bool force = false}) async {
 
   final lastUpdateTime = gUser.twonlySafeBackup!.lastBackupDone;
   if (!force && lastUpdateTime != null) {
-    if (lastUpdateTime
+    if (lastUpdateTime.isAfter(clock.now().subtract(const Duration(days: 1)))) {
-        .isAfter(DateTime.now().subtract(const Duration(days: 1)))) {
       return;
     }
   }
@@ -118,7 +118,7 @@ Future<void> performTwonlySafeBackup({bool force = false}) async {
 
   if (gUser.twonlySafeBackup!.lastBackupDone == null ||
       gUser.twonlySafeBackup!.lastBackupDone!
-          .isAfter(DateTime.now().subtract(const Duration(days: 90)))) {
+          .isAfter(clock.now().subtract(const Duration(days: 90)))) {
     force = true;
   }
 
@@ -190,7 +190,7 @@ Future<void> performTwonlySafeBackup({bool force = false}) async {
     Log.info('Starting upload from twonly Backup.');
     await updateUserdata((user) {
       user.twonlySafeBackup!.backupUploadState = LastBackupUploadState.pending;
-      user.twonlySafeBackup!.lastBackupDone = DateTime.now();
+      user.twonlySafeBackup!.lastBackupDone = clock.now();
       user.twonlySafeBackup!.lastBackupSize = encryptedBackupBytes.length;
       return user;
     });

lib/src/utils/avatars.dart

@@ -7,7 +7,7 @@ import 'package:twonly/globals.dart';
 import 'package:twonly/src/utils/misc.dart';
 
 Future<void> createPushAvatars() async {
-  final contacts = await twonlyDB.contactsDao.getAllNotBlockedContacts();
+  final contacts = await twonlyDB.contactsDao.getAllContacts();
 
   for (final contact in contacts) {
     if (contact.avatarSvgCompressed == null) continue;

lib/src/utils/log.dart

@@ -1,4 +1,5 @@
 import 'dart:io';
+import 'package:clock/clock.dart';
 import 'package:flutter/foundation.dart';
 import 'package:logging/logging.dart';
 import 'package:mutex/mutex.dart';
@@ -96,7 +97,7 @@ Future<void> _writeLogToFile(LogRecord record) async {
 
   // Prepare the log message
   final logMessage =
-      '${DateTime.now().toString().split(".")[0]} ${record.level.name} [twonly] ${record.loggerName} > ${record.message}\n';
+      '${clock.now().toString().split(".")[0]} ${record.level.name} [twonly] ${record.loggerName} > ${record.message}\n';
 
   await writeToLogGuard.protect(() async {
     // Append the log message to the file

lib/src/utils/misc.dart

@@ -1,6 +1,7 @@
 import 'dart:convert';
 import 'dart:io';
 import 'dart:math';
+import 'package:clock/clock.dart';
 import 'package:convert/convert.dart';
 import 'package:crypto/crypto.dart';
 import 'package:flutter/material.dart';
@@ -197,7 +198,7 @@ bool isDarkMode(BuildContext context) {
 }
 
 bool isToday(DateTime lastImageSend) {
-  final now = DateTime.now();
+  final now = clock.now();
   return lastImageSend.year == now.year &&
       lastImageSend.month == now.month &&
       lastImageSend.day == now.day;
@@ -235,7 +236,7 @@ String formatDateTime(BuildContext context, DateTime? dateTime) {
   if (dateTime == null) {
     return 'Never';
   }
-  final now = DateTime.now();
+  final now = clock.now();
   final difference = now.difference(dateTime);
 
   final date = DateFormat.yMd(Localizations.localeOf(context).toLanguageTag())

lib/src/views/camera/camera_preview_components/camera_preview_controller_view.dart

@@ -1,6 +1,7 @@
 import 'dart:async';
 import 'dart:io';
 import 'package:camera/camera.dart';
+import 'package:clock/clock.dart';
 import 'package:device_info_plus/device_info_plus.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -165,7 +166,7 @@ class _CameraPreviewViewState extends State<CameraPreviewView> {
   DateTime? _videoRecordingStarted;
   Timer? _videoRecordingTimer;
 
-  DateTime _currentTime = DateTime.now();
+  DateTime _currentTime = clock.now();
   final GlobalKey keyTriggerButton = GlobalKey();
   final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();
 
@@ -519,7 +520,7 @@ class _CameraPreviewViewState extends State<CameraPreviewView> {
       _videoRecordingTimer =
           Timer.periodic(const Duration(milliseconds: 15), (timer) {
         setState(() {
-          _currentTime = DateTime.now();
+          _currentTime = clock.now();
         });
         if (_videoRecordingStarted != null &&
             _currentTime.difference(_videoRecordingStarted!).inSeconds >=
@@ -530,7 +531,7 @@ class _CameraPreviewViewState extends State<CameraPreviewView> {
         }
       });
       setState(() {
-        _videoRecordingStarted = DateTime.now();
+        _videoRecordingStarted = clock.now();
         _isVideoRecording = true;
       });
     } on CameraException catch (e) {

lib/src/views/camera/camera_preview_components/video_recording_time.dart

@@ -1,3 +1,4 @@
+import 'package:clock/clock.dart';
 import 'package:flutter/material.dart';
 
 class VideoRecordingTimer extends StatelessWidget {
@@ -12,7 +13,7 @@ class VideoRecordingTimer extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     if (videoRecordingStarted != null) {
-      final currentTime = DateTime.now();
+      final currentTime = clock.now();
       return Positioned(
         top: 50,
         left: 0,

lib/src/views/camera/image_editor/layers/filters/datetime_filter.dart

@@ -1,3 +1,4 @@
+import 'package:clock/clock.dart';
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 import 'package:twonly/src/views/camera/image_editor/layers/filter_layer.dart';
@@ -9,8 +10,8 @@ class DateTimeFilter extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    final currentTime = DateFormat('HH:mm').format(DateTime.now());
+    final currentTime = DateFormat('HH:mm').format(clock.now());
-    final currentDate = DateFormat('dd.MM.yyyy').format(DateTime.now());
+    final currentDate = DateFormat('dd.MM.yyyy').format(clock.now());
     return FilterSkeleton(
       child: Positioned(
         bottom: 80,

lib/src/views/camera/image_editor/layers/filters/location_filter.dart

@@ -3,6 +3,7 @@ import 'dart:convert';
 import 'dart:io';
 
 import 'package:cached_network_image/cached_network_image.dart';
+import 'package:clock/clock.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:http/http.dart' as http;
@@ -133,7 +134,7 @@ Future<List<Sticker>> getStickerIndex() async {
 
   if (indexFile.existsSync() && kReleaseMode) {
     final lastModified = indexFile.lastModifiedSync();
-    final difference = DateTime.now().difference(lastModified);
+    final difference = clock.now().difference(lastModified);
     final content = await indexFile.readAsString();
     final jsonList = json.decode(content) as List;
     res = jsonList

lib/src/views/camera/share_image_editor_view.dart

@@ -2,6 +2,7 @@
 
 import 'dart:async';
 import 'dart:collection';
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart' show Value;
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
@@ -509,7 +510,7 @@ class _ShareImageEditorView extends State<ShareImageEditorView> {
       final mediaFile = await twonlyDB.mediaFilesDao.insertMedia(
         MediaFilesCompanion(
           type: Value(mediaService.mediaFile.type),
-          createdAt: Value(DateTime.now()),
+          createdAt: Value(clock.now()),
           stored: const Value(true),
         ),
       );

lib/src/views/camera/share_image_view.dart

@@ -7,10 +7,10 @@ import 'package:flutter/material.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:twonly/globals.dart';
 import 'package:twonly/src/database/daos/contacts.dao.dart';
-import 'package:twonly/src/database/daos/groups.dao.dart';
 import 'package:twonly/src/database/tables/mediafiles.table.dart';
 import 'package:twonly/src/database/twonly.db.dart';
 import 'package:twonly/src/services/api/mediafiles/upload.service.dart';
+import 'package:twonly/src/services/flame.service.dart';
 import 'package:twonly/src/services/mediafiles/mediafile.service.dart';
 import 'package:twonly/src/utils/misc.dart';
 import 'package:twonly/src/views/camera/share_image_components/best_friends_selector.dart';

lib/src/views/chats/chat_list_components/last_message_time.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 
+import 'package:clock/clock.dart';
 import 'package:flutter/material.dart';
 import 'package:twonly/globals.dart';
 import 'package:twonly/src/database/twonly.db.dart';
@@ -28,12 +29,13 @@ class _LastMessageTimeState extends State<LastMessageTime> {
       if (widget.message != null) {
         final lastAction = await twonlyDB.messagesDao
             .getLastMessageAction(widget.message!.messageId);
-        lastMessageInSeconds = DateTime.now()
+        lastMessageInSeconds = clock
+            .now()
             .difference(lastAction?.actionAt ?? widget.message!.createdAt)
             .inSeconds;
       } else if (widget.dateTime != null) {
         lastMessageInSeconds =
-            DateTime.now().difference(widget.dateTime!).inSeconds;
+            clock.now().difference(widget.dateTime!).inSeconds;
       }
       if (mounted) {
         setState(() {

lib/src/views/chats/chat_messages_components/entries/friendly_message_time.comp.dart

@@ -1,3 +1,4 @@
+import 'package:clock/clock.dart';
 import 'package:flutter/material.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:intl/intl.dart' show DateFormat;
@@ -51,7 +52,7 @@ class FriendlyMessageTime extends StatelessWidget {
 }
 
 String friendlyTime(BuildContext context, DateTime dt) {
-  final now = DateTime.now();
+  final now = clock.now();
   final diff = now.difference(dt);
 
   if (diff.inMinutes >= 0 && diff.inMinutes < 60) {

lib/src/views/chats/chat_messages_components/message_context_menu.dart

@@ -1,5 +1,6 @@
 // ignore_for_file: inference_failure_on_function_invocation
 
+import 'package:clock/clock.dart';
 import 'package:fixnum/fixnum.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
@@ -113,7 +114,7 @@ class MessageContextMenu extends StatelessWidget {
                 await twonlyDB.messagesDao.handleMessageDeletion(
                   null,
                   message.messageId,
-                  DateTime.now(),
+                  clock.now(),
                 );
                 await sendCipherTextToGroup(
                   message.groupId,
@@ -203,7 +204,7 @@ Future<void> editTextMessage(BuildContext context, Message message) async {
               if (newText != null &&
                   newText != message.content &&
                   newText != '') {
-                final timestamp = DateTime.now();
+                final timestamp = clock.now();
 
                 await twonlyDB.messagesDao.handleTextEdit(
                   null,

lib/src/views/chats/media_viewer.view.dart

@@ -1,5 +1,6 @@
 import 'dart:async';
 import 'dart:collection';
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart' show Value;
 import 'package:flutter/material.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
@@ -291,7 +292,7 @@ class _MediaViewerViewState extends State<MediaViewerView> {
       }).catchError(Log.error);
     } else {
       if (currentMediaLocal.mediaFile.displayLimitInMilliseconds != null) {
-        canBeSeenUntil = DateTime.now().add(
+        canBeSeenUntil = clock.now().add(
               Duration(
                 milliseconds:
                     currentMediaLocal.mediaFile.displayLimitInMilliseconds!,
@@ -314,7 +315,7 @@ class _MediaViewerViewState extends State<MediaViewerView> {
     nextMediaTimer?.cancel();
     progressTimer?.cancel();
     if (canBeSeenUntil != null) {
-      nextMediaTimer = Timer(canBeSeenUntil!.difference(DateTime.now()), () {
+      nextMediaTimer = Timer(canBeSeenUntil!.difference(clock.now()), () {
         if (context.mounted) {
           nextMediaOrExit();
         }
@@ -326,7 +327,7 @@ class _MediaViewerViewState extends State<MediaViewerView> {
             canBeSeenUntil == null) {
           return;
         }
-        final difference = canBeSeenUntil!.difference(DateTime.now());
+        final difference = canBeSeenUntil!.difference(clock.now());
         // Calculate the progress as a value between 0.0 and 1.0
         progress =
             difference.inMilliseconds / (mediaFile.displayLimitInMilliseconds!);

lib/src/views/components/max_flame_list_title.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'package:clock/clock.dart';
 import 'package:drift/drift.dart' show Value;
 import 'package:flutter/material.dart';
 import 'package:twonly/globals.dart';
@@ -23,39 +24,22 @@ class MaxFlameListTitle extends StatefulWidget {
 }
 
 class _MaxFlameListTitleState extends State<MaxFlameListTitle> {
-  int _flameCounter = 0;
+  Group? _group;
-  Group? _directChat;
   late String _groupId;
-
-  late StreamSubscription<int> _flameCounterSub;
   late StreamSubscription<Group?> _groupSub;
 
   @override
   void initState() {
     _groupId = getUUIDforDirectChat(widget.contactId, gUser.userId);
-    final stream = twonlyDB.groupsDao.watchFlameCounter(_groupId);
+    final stream = twonlyDB.groupsDao.watchGroup(_groupId);
-    _flameCounterSub = stream.listen((counter) {
+    _groupSub = stream.listen((update) {
-      if (mounted) {
+      if (mounted) setState(() => _group = update);
-        setState(() {
-          // in the watchFlameCounter a one is added, so remove this here
-          _flameCounter = counter - 1;
-        });
-      }
-    });
-    final stream2 = twonlyDB.groupsDao.watchGroup(_groupId);
-    _groupSub = stream2.listen((update) {
-      if (mounted) {
-        setState(() {
-          _directChat = update;
-        });
-      }
     });
     super.initState();
   }
 
   @override
   void dispose() {
-    _flameCounterSub.cancel();
     _groupSub.cancel();
     super.dispose();
   }
@@ -73,13 +57,13 @@ class _MaxFlameListTitleState extends State<MaxFlameListTitle> {
       return;
     }
     Log.info(
-      'Restoring flames from ${_directChat!.flameCounter} to ${_directChat!.maxFlameCounter}',
+      'Restoring flames from ${_group!.flameCounter} to ${_group!.maxFlameCounter}',
     );
     await twonlyDB.groupsDao.updateGroup(
       _groupId,
       GroupsCompanion(
-        flameCounter: Value(_directChat!.maxFlameCounter),
+        flameCounter: Value(_group!.maxFlameCounter),
-        lastFlameCounterChange: Value(DateTime.now()),
+        lastFlameCounterChange: Value(clock.now()),
       ),
     );
     await syncFlameCounters(forceForGroup: _groupId);
@@ -87,11 +71,7 @@ class _MaxFlameListTitleState extends State<MaxFlameListTitle> {
 
   @override
   Widget build(BuildContext context) {
-    if (_directChat == null ||
+    if (_group == null || !isItPossibleToRestoreFlames(_group!)) {
-        _directChat!.maxFlameCounter <= 2 ||
-        _flameCounter >= _directChat!.maxFlameCounter ||
-        _directChat!.maxFlameCounterFrom!
-            .isBefore(DateTime.now().subtract(const Duration(days: 4)))) {
       return Container();
     }
     return BetterListTile(
@@ -102,7 +82,7 @@ class _MaxFlameListTitleState extends State<MaxFlameListTitle> {
           emoji: '🔥',
         ),
       ),
-      text: 'Restore your ${_directChat!.maxFlameCounter + 1} lost flames',
+      text: 'Restore your ${_group!.maxFlameCounter} lost flames',
     );
   }
 }

lib/src/views/memories/memories.view.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'package:clock/clock.dart';
 import 'package:flutter/material.dart';
 import 'package:intl/intl.dart';
 import 'package:twonly/globals.dart';
@@ -65,7 +66,7 @@ class MemoriesViewState extends State<MemoriesView> {
       var lastMonth = '';
       galleryItems = [];
 
-      final now = DateTime.now();
+      final now = clock.now();
 
       for (final mediaFile in mediaFiles) {
         final mediaService = MediaFileService(mediaFile);

lib/src/views/updates/62_database_migration.view.dart

@@ -1,6 +1,7 @@
 import 'dart:collection' show HashSet;
 import 'dart:convert';
 import 'dart:io';
+import 'package:clock/clock.dart';
 import 'package:cryptography_plus/cryptography_plus.dart';
 import 'package:drift/drift.dart';
 import 'package:flutter/material.dart';
@@ -81,7 +82,7 @@ class _DatabaseMigrationViewState extends State<DatabaseMigrationView> {
             lastMessageSend: Value(oldContact.lastMessageSend),
             flameCounter: Value(oldContact.flameCounter),
             maxFlameCounter: Value(oldContact.flameCounter),
-            maxFlameCounterFrom: Value(DateTime.now()),
+            maxFlameCounterFrom: Value(clock.now()),
           ),
         );
       } catch (e) {

pubspec.lock

@@ -266,7 +266,7 @@ packages:
     source: hosted
     version: "0.4.2"
   clock:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: clock
       sha256: fddb70d9b5277016c77a80201021d40a2247104d9f4aa7bab7157b7e3f05b84b

pubspec.yaml

@@ -25,6 +25,7 @@ dependencies:
   web_socket_channel: ^3.0.1
   convert: ^3.1.2
   crypto: ^3.0.7
+  clock: ^1.1.2
 
   
   # Trusted publisher flutter.dev 

test/features/flame_counter_test.dart

@@ -0,0 +1,139 @@
+import 'package:clock/clock.dart';
+import 'package:drift/drift.dart';
+import 'package:drift/native.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:mutex/mutex.dart';
+import 'package:twonly/globals.dart';
+import 'package:twonly/src/database/daos/contacts.dao.dart';
+import 'package:twonly/src/database/twonly.db.dart';
+import 'package:twonly/src/model/json/userdata.dart';
+import 'package:twonly/src/services/flame.service.dart';
+
+Future<void> expectFlame(DateTime time, String groupId, int counter) async {
+  await withClock(
+    Clock.fixed(time),
+    () async {
+      final group = (await twonlyDB.groupsDao.getGroup(groupId))!;
+      expect(
+        getFlameCounterFromGroup(group),
+        counter,
+        reason: StackTrace.current.toString(),
+      );
+    },
+  );
+}
+
+void main() {
+  final mutex = Mutex();
+  var usedUserIds = 0;
+
+  Future<int> getAndCreateUserId() async {
+    return mutex.protect<int>(() async {
+      final userId = usedUserIds += 1;
+      await twonlyDB.contactsDao.insertContact(
+        ContactsCompanion(userId: Value(userId), username: Value('$userId')),
+      );
+      return userId;
+    });
+  }
+
+  setUp(() async {
+    twonlyDB = TwonlyDB.forTesting(
+      DatabaseConnection(
+        NativeDatabase.memory(),
+        // Recommended for widget tests to avoid test errors.
+        closeStreamsSynchronously: true,
+      ),
+    );
+
+    gUser = UserData(
+      userId: 0x133337,
+      username: 'test_user',
+      displayName: 'Test User',
+      subscriptionPlan: 'Free',
+    )..appVersion = 62;
+  });
+
+  test('test flame counter', () async {
+    final contactId = await getAndCreateUserId();
+    final contact = (await twonlyDB.contactsDao.getContactById(contactId))!;
+    await twonlyDB.groupsDao.createNewDirectChat(
+      contactId,
+      GroupsCompanion(
+        groupName: Value(
+          getContactDisplayName(contact),
+        ),
+      ),
+    );
+
+    final group = (await twonlyDB.groupsDao.getDirectChat(contactId))!;
+
+    await expectFlame(DateTime(2026, 2, 3, 16), group.groupId, 0);
+
+    await withClock(
+      Clock.fixed(DateTime(2026, 2, 2, 16)),
+      () async {
+        await incFlameCounter(group.groupId, true, DateTime(2026, 2, 2, 10));
+        await incFlameCounter(group.groupId, false, DateTime(2026, 2, 2, 15));
+      },
+    );
+
+    await expectFlame(DateTime(2026, 2, 2, 18), group.groupId, 1);
+    await expectFlame(DateTime(2026, 2, 3, 16), group.groupId, 1);
+    await expectFlame(DateTime(2026, 2, 4, 16), group.groupId, 1);
+    await expectFlame(DateTime(2026, 2, 5, 16), group.groupId, 0);
+
+    await withClock(
+      Clock.fixed(DateTime(2026, 2, 5, 16)),
+      () async {
+        await incFlameCounter(group.groupId, true, DateTime(2026, 2, 5, 17));
+        await incFlameCounter(group.groupId, false, DateTime(2026, 2, 5, 18));
+      },
+    );
+
+    await expectFlame(DateTime(2026, 2, 5, 19), group.groupId, 1);
+
+    await withClock(
+      Clock.fixed(DateTime(2026, 2, 6, 1)),
+      () async {
+        await incFlameCounter(group.groupId, true, DateTime(2026, 2, 6, 1));
+        await incFlameCounter(group.groupId, false, DateTime(2026, 2, 6, 2));
+      },
+    );
+
+    await expectFlame(DateTime(2026, 2, 6, 19), group.groupId, 2);
+    await expectFlame(DateTime(2026, 3, 1, 19), group.groupId, 0);
+
+    for (var i = 1; i <= 20; i++) {
+      await withClock(
+        Clock.fixed(DateTime(2026, 3, i, 1)),
+        () async {
+          await incFlameCounter(group.groupId, true, DateTime(2026, 3, i, 2));
+          await incFlameCounter(group.groupId, false, DateTime(2026, 3, i, 3));
+        },
+      );
+    }
+
+    await expectFlame(DateTime(2026, 3, 20, 19), group.groupId, 20);
+    await expectFlame(DateTime(2026, 3, 23, 19), group.groupId, 0);
+
+    await withClock(
+      Clock.fixed(DateTime(2026, 3, 24, 19)),
+      () async {
+        final group2 = (await twonlyDB.groupsDao.getGroup(group.groupId))!;
+        expect(isItPossibleToRestoreFlames(group2), true);
+      },
+    );
+    await withClock(
+      Clock.fixed(DateTime(2026, 3, 25, 19)),
+      () async {
+        final group2 = (await twonlyDB.groupsDao.getGroup(group.groupId))!;
+        expect(isItPossibleToRestoreFlames(group2), false);
+      },
+    );
+  });
+
+  tearDown(() async {
+    await twonlyDB.close();
+  });
+}