refactor overlay system

lib/widgets/composer/overlays/room_overlay.dart

@@ -0,0 +1,62 @@
+import "package:hooks_riverpod/hooks_riverpod.dart";
+import "package:material_ui/material_ui.dart";
+import "package:nexus/controllers/rooms.dart";
+import "package:nexus/controllers/via.dart";
+import "package:nexus/widgets/avatar_or_hash.dart";
+
+class const RoomOverlay(
+  final String roomId, {
+  required final String query,
+  required final void Function({required String id, required String name})
+  addTag,
+  super.key,
+}) extends ConsumerWidget {
+  @override
+  Widget build(BuildContext context, WidgetRef ref) {
+    final rooms = ref.watch(RoomsController.provider);
+    return ListView(
+      children:
+          (query.isEmpty
+                  ? rooms.values
+                  : rooms.values.where(
+                      (room) => (room.metadata?.name ?? room.metadata?.id ?? "")
+                          .toLowerCase()
+                          .contains(query.toLowerCase()),
+                    ))
+              .map((room) {
+                final name =
+                    room.metadata?.name ??
+                    room.metadata?.canonicalAlias ??
+                    room.metadata?.id ??
+                    "Unknown Room";
+                return Material(
+                  color: Colors.transparent,
+                  child: ListTile(
+                    leading: AvatarOrHash(
+                      room.metadata?.avatar,
+                      name,
+                      fallback: Icon(Icons.numbers),
+                    ),
+                    title: Text(name),
+                    subtitle: room.metadata?.topic == null
+                        ? null
+                        : Text(room.metadata!.topic!, maxLines: 1),
+                    onTap: () {
+                      final vias = ref.watch(ViaController.provider(room));
+                      addTag(
+                        id: "[#$name](matrix:roomid/${room.metadata?.id.substring(1)}$vias)",
+                        name:
+                            (room.metadata?.canonicalAlias ?? room.metadata?.id)
+                                ?.substring(1)
+                                .split(":")
+                                .first ??
+                            "",
+                      );
+                    },
+                  ),
+                );
+              })
+              .toList(),
+    );
+  }
+}