feat: add screen view observer firebase analytic

lib/golektruk.dart

@@ -1,7 +1,10 @@
+import 'package:auto_route/auto_route.dart';
 import 'package:component_library/component_library.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:golek_flutter_new/routes/app_router.gr.dart';
+import 'package:golek_flutter_new/screen_view_observer.dart';
+import 'package:monitoring/monitoring.dart';
 
 import 'l10n/app_localizations.dart';
 
@@ -16,6 +19,7 @@ class _GolekTrukState extends State<GolekTruk> {
   final _lightTheme = LightGolekThemeData();
   final _darkTheme = DarkGolekThemeData();
   final _appRouter = AppRouter();
+  final _analyticsService = AnalyticsService();
 
   @override
   Widget build(BuildContext context) {
@@ -40,7 +44,13 @@ class _GolekTrukState extends State<GolekTruk> {
         ],
         backButtonDispatcher: RootBackButtonDispatcher(),
         routeInformationParser: _appRouter.defaultRouteParser(),
-        routerDelegate: _appRouter.delegate(),
+        routerDelegate: AutoRouterDelegate(
+          _appRouter,
+          navigatorObservers: () => [
+            AutoRouteObserver(),
+            ScreenViewObserver(analyticsService: _analyticsService)
+          ],
+        ),
       ),
     );
   }

lib/screen_view_observer.dart

@@ -0,0 +1,33 @@
+import 'package:auto_route/auto_route.dart';
+import 'package:flutter/material.dart';
+import 'package:monitoring/monitoring.dart';
+
+class ScreenViewObserver extends AutoRouterObserver {
+  final AnalyticsService analyticsService;
+
+  ScreenViewObserver({required this.analyticsService});
+
+  void _sendScreenView(PageRoute<dynamic> route) {
+    final String? screenName = route.settings.name;
+
+    if (screenName != null) {
+      analyticsService.setCurrentScreen(screenName);
+    }
+  }
+
+  @override
+  void didPush(Route route, Route? previousRoute) {
+    super.didPush(route, previousRoute);
+    if (route is PageRoute) {
+      _sendScreenView(route);
+    }
+  }
+
+  @override
+  void didPop(Route route, Route? previousRoute) {
+    super.didPop(route, previousRoute);
+    if (previousRoute is PageRoute && route is PageRoute) {
+      _sendScreenView(previousRoute);
+    }
+  }
+}