replaced explicit routes names with enum values

lib/application.dart

@@ -3,18 +3,17 @@ import 'package:flutter/services.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:lightmeter/data/models/supported_locale.dart';
 import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/navigation/modal_route_args_parser.dart';
+import 'package:lightmeter/navigation/routes.dart';
 import 'package:lightmeter/platform_config.dart';
 import 'package:lightmeter/providers/user_preferences_provider.dart';
 import 'package:lightmeter/screens/film_edit/flow_film_edit.dart';
-import 'package:lightmeter/screens/film_edit/screen_film_edit.dart';
 import 'package:lightmeter/screens/films/screen_films.dart';
 import 'package:lightmeter/screens/lightmeter_pro/screen_lightmeter_pro.dart';
 import 'package:lightmeter/screens/metering/flow_metering.dart';
 import 'package:lightmeter/screens/settings/flow_settings.dart';
 import 'package:lightmeter/screens/shared/release_notes_dialog/flow_dialog_release_notes.dart';
 import 'package:lightmeter/screens/timer/flow_timer.dart';
-import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
-import 'package:m3_lightmeter_resources/m3_lightmeter_resources.dart';
 
 class Application extends StatelessWidget {
   const Application({super.key});
@@ -46,14 +45,14 @@ class Application extends StatelessWidget {
           data: MediaQuery.of(context).copyWith(textScaleFactor: 1.0),
           child: child!,
         ),
-        initialRoute: "metering",
+        initialRoute: NavigationRoutes.meteringScreen.name,
         routes: {
-          "metering": (_) => const ReleaseNotesFlow(child: MeteringFlow()),
-          "settings": (_) => const SettingsFlow(),
-          "films": (_) => const FilmsScreen(),
-          "filmEdit": (context) => FilmEditFlow(args: ModalRoute.of(context)!.settings.arguments! as FilmEditArgs),
-          "lightmeterPro": (_) => LightmeterProScreen(),
-          "timer": (context) => TimerFlow(args: ModalRoute.of(context)!.settings.arguments! as TimerFlowArgs),
+          NavigationRoutes.meteringScreen.name: (_) => const ReleaseNotesFlow(child: MeteringFlow()),
+          NavigationRoutes.settingsScreen.name: (_) => const SettingsFlow(),
+          NavigationRoutes.filmsListScreen.name: (_) => const FilmsScreen(),
+          NavigationRoutes.filmEditScreen.name: (context) => FilmEditFlow(args: context.routeArgs<FilmEditArgs>()),
+          NavigationRoutes.proFeaturesScreen.name: (_) => LightmeterProScreen(),
+          NavigationRoutes.timerScreen.name: (context) => TimerFlow(args: context.routeArgs<TimerFlowArgs>()),
         },
       ),
     );

lib/navigation/modal_route_args_parser.dart

@@ -0,0 +1,7 @@
+import 'package:flutter/widgets.dart';
+
+extension ModalRouteArgsParser on BuildContext {
+  T routeArgs<T>() {
+    return ModalRoute.of(this)!.settings.arguments! as T;
+  }
+}

lib/navigation/routes.dart

@@ -0,0 +1,8 @@
+enum NavigationRoutes {
+  meteringScreen,
+  settingsScreen,
+  filmsListScreen,
+  filmEditScreen,
+  proFeaturesScreen,
+  timerScreen,
+}

lib/screens/films/screen_films.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/navigation/routes.dart';
 import 'package:lightmeter/providers/films_provider.dart';
 import 'package:lightmeter/res/dimens.dart';
 import 'package:lightmeter/screens/film_edit/flow_film_edit.dart';
@@ -71,14 +72,14 @@ class _FilmsScreenState extends State<FilmsScreen> with SingleTickerProviderStat
 
   void _addFilm() {
     Navigator.of(context).pushNamed(
-      'filmEdit',
+      NavigationRoutes.filmEditScreen.name,
       arguments: const FilmEditArgs(film: FilmExponential(name: '', iso: 100, exponent: 1.3)),
     );
   }
 
   void _editFilm(FilmExponential film) {
     Navigator.of(context).pushNamed(
-      'filmEdit',
+      NavigationRoutes.filmEditScreen.name,
       arguments: FilmEditArgs(film: film),
     );
   }

lib/screens/metering/components/shared/readings_container/components/lightmeter_pro/widget_lightmeter_pro.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/navigation/routes.dart';
 import 'package:lightmeter/screens/metering/components/shared/readings_container/components/shared/reading_value_container/widget_container_reading_value.dart';
 
 class LightmeterProAnimatedDialog extends StatelessWidget {
@@ -9,7 +10,7 @@ class LightmeterProAnimatedDialog extends StatelessWidget {
   Widget build(BuildContext context) {
     return GestureDetector(
       onTap: () {
-        Navigator.of(context).pushNamed("lightmeterPro");
+        Navigator.of(context).pushNamed(NavigationRoutes.proFeaturesScreen.name);
       },
       child: ReadingValueContainer(
         color: Theme.of(context).colorScheme.secondary,

lib/screens/metering/screen_metering.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:lightmeter/data/models/ev_source_type.dart';
 import 'package:lightmeter/data/models/exposure_pair.dart';
+import 'package:lightmeter/navigation/routes.dart';
 import 'package:lightmeter/providers/equipment_profile_provider.dart';
 import 'package:lightmeter/providers/services_provider.dart';
 import 'package:lightmeter/providers/user_preferences_provider.dart';
@@ -36,7 +37,7 @@ class MeteringScreen extends StatelessWidget {
                   onNdChanged: (value) => context.read<MeteringBloc>().add(NdChangedEvent(value)),
                   onExposurePairTap: (value) => pushNamed(
                     context,
-                    'timer',
+                    NavigationRoutes.timerScreen.name,
                     arguments: TimerFlowArgs(
                       exposurePair: value,
                       isoValue: state.iso,
@@ -55,7 +56,10 @@ class MeteringScreen extends StatelessWidget {
                     ? UserPreferencesProvider.of(context).toggleEvSourceType
                     : null,
                 onMeasure: () => context.read<MeteringBloc>().add(const MeasureEvent()),
-                onSettings: () => pushNamed(context, 'settings'),
+                onSettings: () => pushNamed(
+                  context,
+                  NavigationRoutes.settingsScreen.name,
+                ),
               ),
             ),
           ],

lib/screens/settings/components/lightmeter_pro/components/buy_pro/widget_list_tile_buy_pro.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/navigation/routes.dart';
 import 'package:lightmeter/res/dimens.dart';
 import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
 
@@ -15,7 +16,7 @@ class BuyProListTile extends StatelessWidget {
       title: Text(S.of(context).getPro),
       onTap: !isPending
           ? () {
-              Navigator.of(context).pushNamed("lightmeterPro");
+              Navigator.of(context).pushNamed(NavigationRoutes.proFeaturesScreen.name);
             }
           : null,
       trailing: isPending

lib/screens/settings/components/metering/components/films/widget_list_tile_films.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'package:lightmeter/generated/l10n.dart';
+import 'package:lightmeter/navigation/routes.dart';
 import 'package:lightmeter/screens/settings/components/shared/iap_list_tile/widget_list_tile_iap.dart';
 
 class FilmsListTile extends StatelessWidget {
@@ -10,7 +11,7 @@ class FilmsListTile extends StatelessWidget {
     return IAPListTile(
       leading: const Icon(Icons.camera_roll_outlined),
       title: Text(S.of(context).films),
-      onTap: () => Navigator.of(context).pushNamed('films'),
+      onTap: () => Navigator.of(context).pushNamed(NavigationRoutes.filmsListScreen.name),
     );
   }
 }