Merge branch 'krille/remove-transaction-workaround' into 'main'

refactor: Remove database transaction workaround

See merge request famedly/company/frontend/famedlysdk!1192

lib/src/client.dart

@@ -1569,10 +1569,11 @@ class Client extends MatrixApi {
       }
       dynamic syncError;
       await _checkSyncFilter();
+      timeout ??= const Duration(seconds: 30);
       final syncRequest = sync(
         filter: syncFilterId,
         since: prevBatch,
-        timeout: timeout?.inMilliseconds ?? 30000,
+        timeout: timeout.inMilliseconds,
         setPresence: syncPresence,
       ).then((v) => Future<SyncUpdate?>.value(v)).catchError((e) {
         syncError = e;
@@ -1580,7 +1581,8 @@ class Client extends MatrixApi {
       });
       _currentSyncId = syncRequest.hashCode;
       onSyncStatus.add(SyncStatusUpdate(SyncStatus.waitingForResponse));
-      final syncResp = await syncRequest;
+      final syncResp =
+          await syncRequest.timeout(timeout + const Duration(seconds: 10));
       onSyncStatus.add(SyncStatusUpdate(SyncStatus.processing));
       if (syncResp == null) throw syncError ?? 'Unknown sync error';
       if (_currentSyncId != syncRequest.hashCode) {

lib/src/database/database_api.dart

@@ -308,7 +308,7 @@ abstract class DatabaseApi {
 
   Future<dynamic> close();
 
-  Future<T> transaction<T>(Future<T> Function() action);
+  Future<void> transaction(Future<void> Function() action);
 
   Future<String> exportDump();
 

lib/src/database/hive_collections_database.dart

@@ -1310,61 +1310,9 @@ class HiveCollectionsDatabase extends DatabaseApi {
     return;
   }
 
-  Completer<void>? _transactionLock;
-  final _transactionZones = <Zone>{};
-
   @override
-  Future<T> transaction<T>(Future<T> Function() action) async {
-    // we want transactions to lock, however NOT if transactoins are run inside of each other.
-    // to be able to do this, we use dart zones (https://dart.dev/articles/archive/zones).
-    // _transactionZones holds a set of all zones which are currently running a transaction.
-    // _transactionLock holds the lock.
-
-    // first we try to determine if we are inside of a transaction currently
-    var isInTransaction = false;
-    Zone? zone = Zone.current;
-    // for that we keep on iterating to the parent zone until there is either no zone anymore
-    // or we have found a zone inside of _transactionZones.
-    while (zone != null) {
-      if (_transactionZones.contains(zone)) {
-        isInTransaction = true;
-        break;
-      }
-      zone = zone.parent;
-    }
-    // if we are inside a transaction....just run the action
-    if (isInTransaction) {
-      return await action();
-    }
-    // if we are *not* in a transaction, time to wait for the lock!
-    while (_transactionLock != null) {
-      await _transactionLock!.future;
-    }
-    // claim the lock
-    final lock = Completer<void>();
-    _transactionLock = lock;
-    try {
-      // run the action inside of a new zone
-      return await runZoned(() async {
-        try {
-          // don't forget to add the new zone to _transactionZones!
-          _transactionZones.add(Zone.current);
-          late final T result;
-          await _collection.transaction(() async {
-            result = await action();
-          });
-          return result;
-        } finally {
-          // aaaand remove the zone from _transactionZones again
-          _transactionZones.remove(Zone.current);
-        }
-      });
-    } finally {
-      // aaaand finally release the lock
-      _transactionLock = null;
-      lock.complete();
-    }
-  }
+  Future<void> transaction(Future<void> Function() action) =>
+      _collection.transaction(action);
 
   @override
   Future<void> updateClient(

lib/src/database/hive_database.dart

@@ -1255,7 +1255,7 @@ class FamedlySdkHiveDatabase extends DatabaseApi {
   final _transactionZones = <Zone>{};
 
   @override
-  Future<T> transaction<T>(Future<T> Function() action) async {
+  Future<void> transaction(Future<void> Function() action) async {
     // we want transactions to lock, however NOT if transactoins are run inside of each other.
     // to be able to do this, we use dart zones (https://dart.dev/articles/archive/zones).
     // _transactionZones holds a set of all zones which are currently running a transaction.

test/database_api_test.dart

@@ -64,18 +64,6 @@ void testDatabase(
       });
       expect(counter++, 3);
     });
-
-    // we can't use Zone.root.run inside of tests so we abuse timers instead
-    Timer(Duration(milliseconds: 50), () async {
-      await database.transaction(() async {
-        expect(counter++, 6);
-      });
-    });
-    await database.transaction(() async {
-      expect(counter++, 4);
-      await Future.delayed(Duration(milliseconds: 100));
-      expect(counter++, 5);
-    });
   });
   test('insertIntoToDeviceQueue', () async {
     toDeviceQueueIndex = await database.insertIntoToDeviceQueue(