Subspace support

lib/helpers/extensions/room_to_children.dart

@@ -0,0 +1,26 @@
+import "package:collection/collection.dart";
+import "package:matrix/matrix.dart";
+import "package:nexus/helpers/extensions/get_full_room.dart";
+import "package:nexus/models/full_room.dart";
+
+extension RoomToChildren on Room {
+  Future<List<FullRoom>> getAllChildren(Client client) async {
+    final direct = await Future.wait(
+      spaceChildren
+          .map(
+            (child) => client.rooms
+                .firstWhereOrNull((r) => r.id == child.roomId)
+                ?.fullRoom,
+          )
+          .nonNulls,
+    );
+
+    return (await Future.wait(
+      direct.map(
+        (child) async => child.roomData.isSpace
+            ? await child.roomData.getAllChildren(client)
+            : [child],
+      ),
+    )).expand((list) => list).toList();
+  }
+}