initial

lib/features/common/traffic/traffic_notifier.dart

@@ -0,0 +1,40 @@
+import 'package:dartx/dartx.dart';
+import 'package:hiddify/data/data_providers.dart';
+import 'package:hiddify/domain/clash/clash.dart';
+import 'package:hiddify/domain/connectivity/connectivity.dart';
+import 'package:hiddify/utils/utils.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'traffic_notifier.g.dart';
+
+// TODO: improve
+@riverpod
+class TrafficNotifier extends _$TrafficNotifier with AppLogger {
+  int get _steps => 100;
+
+  @override
+  Stream<List<Traffic>> build() {
+    return Stream.periodic(const Duration(seconds: 1)).asyncMap(
+      (_) async {
+        return ref.read(clashFacadeProvider).getTraffic().match(
+          (f) {
+            loggy.warning('failed to watch clash traffic: $f');
+            return const ClashTraffic(upload: 0, download: 0);
+          },
+          (traffic) => traffic,
+        ).run();
+      },
+    ).map(
+      (event) => switch (state) {
+        AsyncData(:final value) => [
+            ...value.takeLast(_steps - 1),
+            Traffic(upload: event.upload, download: event.download),
+          ],
+        _ => List.generate(
+            _steps,
+            (index) => const Traffic(upload: 0, download: 0),
+          )
+      },
+    );
+  }
+}