Initial commit

lib/widgets/unread_rooms_badge.dart

@@ -0,0 +1,48 @@
+// SPDX-FileCopyrightText: 2019-Present Christian Kußowski
+// SPDX-FileCopyrightText: 2019-Present Contributors to FluffyChat
+//
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import 'package:badges/badges.dart' as b;
+import 'package:material_ui/material_ui.dart';
+import 'package:matrix/matrix.dart';
+
+import 'matrix.dart';
+
+class UnreadRoomsBadge extends StatelessWidget {
+  final bool Function(Room) filter;
+  final b.BadgePosition? badgePosition;
+  final Widget? child;
+
+  const UnreadRoomsBadge({
+    super.key,
+    required this.filter,
+    this.badgePosition,
+    this.child,
+  });
+
+  @override
+  Widget build(BuildContext context) {
+    final theme = Theme.of(context);
+
+    final unreadCount = Matrix.of(context).client.rooms
+        .where(filter)
+        .where((r) => (r.isUnread || r.membership == Membership.invite))
+        .length;
+    return b.Badge(
+      badgeStyle: b.BadgeStyle(
+        badgeColor: theme.colorScheme.tertiary,
+        elevation: 4,
+        borderSide: BorderSide(color: theme.colorScheme.surface, width: 2),
+      ),
+      badgeContent: Text(
+        unreadCount.toString(),
+        style: TextStyle(color: theme.colorScheme.onTertiary, fontSize: 12),
+      ),
+      showBadge: unreadCount != 0,
+      badgeAnimation: const b.BadgeAnimation.scale(),
+      position: badgePosition ?? b.BadgePosition.bottomEnd(),
+      child: child,
+    );
+  }
+}