small refactors

lib/controllers/room_chat.dart

@@ -17,7 +17,7 @@ import "package:nexus/models/requests/send_message.dart";
 import "package:nexus/models/room.dart";
 import "package:nexus/models/room_chat.dart";
 
-class RoomChatController(final (String roomId, String? withEventId) info)
+class RoomChatController(final (String roomId, String? contextualEvent) info)
     extends AsyncNotifier<RoomChat?> {
   @override
   Future<RoomChat?> build() async {
@@ -34,9 +34,13 @@ class RoomChatController(final (String roomId, String? withEventId) info)
       await ref.read(RoomsController.provider.notifier).addState(roomId, state);
     }
 
+    if (info.$2 == null ||
+        room.events.values.map((e) => e.eventId).contains(info.$2)) {
       return .new(
         events: room.timeline
-          .toEntryIList(compare: (a, b) => (a?.key ?? 0).compareTo(b?.key ?? 0))
+            .toEntryIList(
+              compare: (a, b) => (a?.key ?? 0).compareTo(b?.key ?? 0),
+            )
             .map((element) => element.value)
             .toIList()
             .addAll(room.clientSticky)
@@ -60,6 +64,18 @@ class RoomChatController(final (String roomId, String? withEventId) info)
         hasMore: room.hasMore,
       );
     }
+    {
+      final context = await client.getEventContext(
+        .new(roomId: roomId, eventId: info.$2!, limit: 20),
+      );
+
+      return .new(
+        events: context.events,
+        hasMore: true,
+        historicalData: .new(start: context.start, end: context.end),
+      );
+    }
+  }
 
   Future<void> deleteMessage(Event event, {String? reason}) => ref
       .watch(ClientController.provider.notifier)

lib/helpers/hooks/chat_scroll.dart

@@ -92,19 +92,14 @@ final class ChatScroll({
         (item) => item.eventId == itemId,
       );
 
+      double? offset;
       if (historyIndex != -1) {
         // TODO: Replace SuperSliverView because of the bug that requires this: #94
         // ignore: invalid_use_of_visible_for_testing_member
-        final offset = historyListController.value.getOffsetToReveal(
+        offset = historyListController.value.getOffsetToReveal(
           historyIndex,
           0.5,
         );
-
-        await scrollController.animateTo(
-          offset,
-          duration: const Duration(milliseconds: 700),
-          curve: Curves.easeInOut,
-        );
       } else {
         final liveIndex = split.live.indexWhere(
           (item) => item.eventId == itemId,
@@ -112,11 +107,15 @@ final class ChatScroll({
 
         if (liveIndex != -1) {
           // ignore: invalid_use_of_visible_for_testing_member
-          final offset = liveListController.value.getOffsetToReveal(
-            liveIndex,
-            0.5,
-          );
+          offset = liveListController.value.getOffsetToReveal(liveIndex, 0.5);
+        }
+      }
 
+      if (offset == null) {
+        // not in current timeline
+      }
+
+      if (offset != null) {
         await scrollController.animateTo(
           offset,
           duration: const Duration(milliseconds: 700),
@@ -124,7 +123,6 @@ final class ChatScroll({
         );
       }
     }
-    }
 
     return .new(
       historyItems: split.history,

lib/models/room.dart

@@ -12,17 +12,26 @@ part "room.g.dart";
 class const Room({
   @JsonKey(name: "meta") final RoomMetadata? metadata,
 
+  /// [timeline] is an IMap of timelineRowId to eventRowId
   @JsonKey(fromJson: Room.timelineTupleJsonToIMap)
   final IMap<int, int?> timeline = const IMap.empty(),
 
+  /// [clientSticky] is an ISet of eventRowId
+  @JsonKey(includeFromJson: false, includeToJson: false)
   final ISet<int> clientSticky = const ISet.empty(),
 
+  /// [events] is an IMap of eventRowId to event
   @JsonKey(fromJson: Room.eventsJsonToIMap)
   final IMap<int, Event> events = const IMap.empty(),
 
   final bool reset = false,
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
   final bool hasFetchedState = false,
+
+  @JsonKey(includeFromJson: false, includeToJson: false)
   final bool hasFetchedMembers = false,
+
   final IMap<String, IMap<String, int>> state = const IMap.empty(),
 
   final IMap<String, IList<ReadReceipt>> receipts = const IMap.empty(),
@@ -32,9 +41,6 @@ class const Room({
   // IMap<String, AccountData> accountData,
   // IList<Notification> notifications,
 }) with _$Room {
-  /// [timeline] is an IMap of timelineRowId to eventRowId
-  /// [events] is an IMap of eventRowId to event
-  /// [clientSticky] is an ISet of eventRowId
   static IMap<int, int?> timelineTupleJsonToIMap(List<dynamic> json) =>
       IMap.fromEntries(
         json.map(

lib/models/room_chat.dart

@@ -21,8 +21,8 @@ class const RoomChat({
 @Freezed(toJson: false, fromJson: false)
 @JsonSerializable()
 class const HistoricalData({
-  required final String end,
   required final String start,
+  required final String end,
 }) with _$HistoricalData {
   Map<String, Object?> toJson() => _$HistoricalDataToJson(this);
 

lib/widgets/room_chat/room_chat.dart

@@ -31,6 +31,7 @@ final class const RoomChat({
   Widget build(BuildContext context, WidgetRef ref) {
     final relatedEvent = useState<Event?>(null);
     final relationType = useState(RelationType.reply);
+    final contextualEvent = useState<String?>(initialHighlightedEvent);
     final highlightedEvent = useState<String?>(initialHighlightedEvent);
 
     final composerSize = useState<double>(64);
@@ -62,7 +63,7 @@ final class const RoomChat({
 
     final controllerProvider = RoomChatController.provider((
       roomId,
-      initialHighlightedEvent,
+      contextualEvent.value,
     ));
     final notifier = ref.watch(controllerProvider.notifier);