implemented RemoteConfigService

lib/application_wrapper.dart

@@ -3,11 +3,13 @@ import 'package:lightmeter/data/caffeine_service.dart';
 import 'package:lightmeter/data/haptics_service.dart';
 import 'package:lightmeter/data/light_sensor_service.dart';
 import 'package:lightmeter/data/permissions_service.dart';
+import 'package:lightmeter/data/remote_config_service.dart';
 import 'package:lightmeter/data/shared_prefs_service.dart';
 import 'package:lightmeter/data/volume_events_service.dart';
 import 'package:lightmeter/environment.dart';
 import 'package:lightmeter/providers/equipment_profile_provider.dart';
 import 'package:lightmeter/providers/films_provider.dart';
+import 'package:lightmeter/providers/remote_config_provider.dart';
 import 'package:lightmeter/providers/services_provider.dart';
 import 'package:lightmeter/providers/user_preferences_provider.dart';
 import 'package:m3_lightmeter_iap/m3_lightmeter_iap.dart';
@@ -23,9 +25,10 @@ class ApplicationWrapper extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
     return FutureBuilder(
-      future: Future.wait([
+      future: Future.wait<dynamic>([
         SharedPreferences.getInstance(),
         const LightSensorService(LocalPlatform()).hasSensor(),
+        const RemoteConfigService().activeAndFetchFeatures(),
       ]),
       builder: (_, snapshot) {
         if (snapshot.data != null) {
@@ -38,16 +41,19 @@ class ApplicationWrapper extends StatelessWidget {
             hapticsService: const HapticsService(),
             lightSensorService: const LightSensorService(LocalPlatform()),
             permissionsService: const PermissionsService(),
+            remoteConfigService: const RemoteConfigService(),
             userPreferencesService: userPreferencesService,
             volumeEventsService: const VolumeEventsService(LocalPlatform()),
-            child: EquipmentProfileProvider(
-              storageService: iapService,
-              child: FilmsProvider(
+            child: RemoteConfig(
+              child: EquipmentProfileProvider(
                 storageService: iapService,
-                child: UserPreferencesProvider(
-                  hasLightSensor: hasLightSensor,
-                  userPreferencesService: userPreferencesService,
-                  child: child,
+                child: FilmsProvider(
+                  storageService: iapService,
+                  child: UserPreferencesProvider(
+                    hasLightSensor: hasLightSensor,
+                    userPreferencesService: userPreferencesService,
+                    child: child,
+                  ),
                 ),
               ),
             ),

lib/data/models/feature.dart

@@ -0,0 +1,5 @@
+enum Feature { unlockProFeaturesText }
+
+const featuresDefaultValues = {
+  Feature.unlockProFeaturesText: false,
+};

lib/data/remote_config_service.dart

@@ -0,0 +1,42 @@
+import 'dart:async';
+import 'dart:developer';
+
+import 'package:firebase_core/firebase_core.dart';
+import 'package:firebase_crashlytics/firebase_crashlytics.dart';
+import 'package:firebase_remote_config/firebase_remote_config.dart';
+import 'package:flutter/foundation.dart';
+import 'package:lightmeter/data/models/feature.dart';
+
+class RemoteConfigService {
+  const RemoteConfigService();
+
+  Future<void> activeAndFetchFeatures() async {
+    final FirebaseRemoteConfig remoteConfig = FirebaseRemoteConfig.instance;
+    const cacheStaleDuration = kDebugMode ? Duration(minutes: 1) : Duration(hours: 12);
+
+    try {
+      await remoteConfig.setConfigSettings(
+        RemoteConfigSettings(
+          fetchTimeout: const Duration(seconds: 15),
+          minimumFetchInterval: cacheStaleDuration,
+        ),
+      );
+      await remoteConfig.setDefaults(featuresDefaultValues.map((key, value) => MapEntry(key.name, value)));
+      await remoteConfig.activate();
+      await remoteConfig.ensureInitialized();
+      unawaited(remoteConfig.fetch());
+
+      log('Firebase remote config initialized successfully');
+    } on FirebaseException catch (e) {
+      _logError('Firebase exception during Firebase Remote Config initialization: $e');
+    } on Exception catch (e) {
+      _logError('Error during Firebase Remote Config initialization: $e');
+    }
+  }
+
+  bool isEnabled(Feature feature) => FirebaseRemoteConfig.instance.getBool(feature.name);
+
+  void _logError(dynamic throwable, {StackTrace? stackTrace}) {
+    FirebaseCrashlytics.instance.recordError(throwable, stackTrace);
+  }
+}

lib/providers/remote_config_provider.dart

@@ -0,0 +1,17 @@
+import 'package:flutter/material.dart';
+import 'package:lightmeter/data/models/feature.dart';
+import 'package:lightmeter/providers/services_provider.dart';
+
+class RemoteConfig extends InheritedWidget {
+  const RemoteConfig({
+    super.key,
+    required super.child,
+  });
+
+  static bool isEnabled(BuildContext context, Feature feature) {
+    return ServicesProvider.of(context).remoteConfigService.isEnabled(feature);
+  }
+
+  @override
+  bool updateShouldNotify(RemoteConfig oldWidget) => true;
+}

lib/providers/services_provider.dart

@@ -3,6 +3,7 @@ import 'package:lightmeter/data/caffeine_service.dart';
 import 'package:lightmeter/data/haptics_service.dart';
 import 'package:lightmeter/data/light_sensor_service.dart';
 import 'package:lightmeter/data/permissions_service.dart';
+import 'package:lightmeter/data/remote_config_service.dart';
 import 'package:lightmeter/data/shared_prefs_service.dart';
 import 'package:lightmeter/data/volume_events_service.dart';
 import 'package:lightmeter/environment.dart';
@@ -14,6 +15,7 @@ class ServicesProvider extends InheritedWidget {
   final HapticsService hapticsService;
   final LightSensorService lightSensorService;
   final PermissionsService permissionsService;
+  final RemoteConfigService remoteConfigService;
   final UserPreferencesService userPreferencesService;
   final VolumeEventsService volumeEventsService;
 
@@ -23,6 +25,7 @@ class ServicesProvider extends InheritedWidget {
     required this.hapticsService,
     required this.lightSensorService,
     required this.permissionsService,
+    required this.remoteConfigService,
     required this.userPreferencesService,
     required this.volumeEventsService,
     required super.child,

pubspec.yaml

@@ -13,8 +13,9 @@ dependencies:
   clipboard: 0.1.3
   dynamic_color: 1.6.6
   exif: 3.1.4
-  firebase_core: 2.14.0
-  firebase_crashlytics: 3.3.3
+  firebase_core: 2.20.0
+  firebase_crashlytics: 3.4.2
+  firebase_remote_config: 4.3.2
   flutter:
     sdk: flutter
   flutter_bloc: 8.1.3
@@ -26,7 +27,7 @@ dependencies:
   m3_lightmeter_iap:
     git:
       url: "https://github.com/vodemn/m3_lightmeter_iap"
-      ref: v0.5.0
+      ref: v0.6.2
   m3_lightmeter_resources:
     git:
       url: "https://github.com/vodemn/m3_lightmeter_resources"
@@ -56,7 +57,7 @@ dev_dependencies:
 
 flutter:
   uses-material-design: true
-  assets: 
+  assets:
     - assets/camera_stub_image.jpg
 
 flutter_intl: