App Analytics

android/app/build.gradle

@@ -23,6 +23,7 @@ if (flutterVersionName == null) {
 
 apply plugin: 'com.android.application'
 apply plugin: 'com.google.gms.google-services'
+apply plugin: 'com.google.firebase.crashlytics'
 apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
@@ -79,4 +80,5 @@ dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
     implementation platform('com.google.firebase:firebase-bom:28.0.1')
     implementation 'com.google.firebase:firebase-analytics-ktx'
+    implementation 'com.google.firebase:firebase-crashlytics-ktx'
 }

android/build.gradle

@@ -9,6 +9,7 @@ buildscript {
         classpath 'com.android.tools.build:gradle:4.1.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
         classpath 'com.google.gms:google-services:4.3.8'
+        classpath 'com.google.firebase:firebase-crashlytics-gradle:2.7.0'
     }
 }
 

lib/app/app.dart

@@ -3,6 +3,7 @@ import 'package:feed/core/services/environment_service.dart';
 import 'package:feed/core/services/explode_service.dart';
 import 'package:feed/core/services/key_storage_service.dart';
 import 'package:feed/firebase/analytics.dart';
+import 'package:feed/firebase/crashlytics.dart';
 import 'package:feed/firebase/dynamic_links.dart';
 import 'package:feed/core/services/hive_service/hive_service.dart';
 import 'package:feed/core/services/hive_service/hive_service_impl.dart';
@@ -27,7 +28,6 @@ import 'package:stacked_firebase_auth/stacked_firebase_auth.dart';
 import 'package:stacked_services/stacked_services.dart';
 import 'package:stacked/stacked_annotations.dart';
 import 'package:youtube_explode_dart/youtube_explode_dart.dart';
-
 import 'injection.dart';
 
 /// The @StackedApp annotation generates
@@ -93,8 +93,11 @@ import 'injection.dart';
     LazySingleton(classType: FeedService),
     LazySingleton(classType: DynamicLinksService),
     LazySingleton(classType: AnalyticsService),
+    LazySingleton(
+        classType: CrashlyticsService,
+        resolveUsing: CrashlyticsService.getInstance),
   ],
-  logger: StackedLogger(),
+  logger: StackedLogger(loggerOutputs: [CrashlyticsOutput]),
 )
 class AppSetup {
   /** Serves no purpose besides having an annotation attached to it */

lib/core/services/environment_service.dart

@@ -8,14 +8,14 @@ class EnvironmentService {
 
   /// Returns the value associated with the key
   String getValue(String key, {bool verbose = false}) {
-    final value = env[key] ?? NoKey;
+    final value = dotenv.env[key] ?? NoKey;
     if (verbose) log.v('key:$key value:$value');
     return value;
   }
 
   static Future<EnvironmentService> getInstance() async {
     print('Load environment');
-    await load(fileName: ".env");
+    await dotenv.load(fileName: ".env");
     print('Environement loaded');
     return Future.value(EnvironmentService());
   }

lib/core/services/user_service.dart

@@ -5,6 +5,7 @@ import 'package:feed/core/models/app_models.dart';
 
 import 'package:feed/core/services/hive_service/hive_service.dart';
 import 'package:feed/core/services/key_storage_service.dart';
+import 'package:feed/firebase/analytics.dart';
 import 'package:feed/remote/api/api_service.dart';
 import 'package:feed/remote/client.dart';
 import 'package:stacked_firebase_auth/stacked_firebase_auth.dart';
@@ -15,6 +16,7 @@ class UserService {
   final _apiService = locator<APIService>();
   final _remoteClient = locator<RemoteClient>();
   final _hiveService = locator<HiveService>();
+  final _crashlytics = locator<AnalyticsService>();
   final _authService = locator<FirebaseAuthenticationService>();
 
   User? _loggedInUser;
@@ -89,6 +91,7 @@ class UserService {
 
     _loggedInUser = authUser;
     _remoteClient.updateToken(newToken: authUser.token);
+    _crashlytics.setUserIdentifier(currentUser.id);
 
     return true;
   }

lib/firebase/analytics.dart

@@ -1,9 +1,50 @@
 import 'package:firebase_analytics/firebase_analytics.dart';
 import 'package:firebase_analytics/observer.dart';
+import 'package:firebase_crashlytics/firebase_crashlytics.dart';
+import 'package:flutter/foundation.dart';
 
 class AnalyticsService {
   final FirebaseAnalytics _analytics = FirebaseAnalytics();
 
   FirebaseAnalyticsObserver getAnalyticsObserver() =>
       FirebaseAnalyticsObserver(analytics: _analytics);
+
+  Future logAppOpen() async {
+    if (kReleaseMode) {
+      await _analytics.logAppOpen();
+    }
+  }
+
+  void logLogin() {
+    if (kReleaseMode) {
+      _analytics.logLogin(loginMethod: 'google');
+    }
+  }
+
+  Future logShare(String itemId,
+      {String contentType = 'Post', String method = 'in_app_share'}) async {
+    if (kReleaseMode) {
+      await _analytics.logShare(
+        contentType: contentType,
+        itemId: itemId,
+        method: method,
+      );
+    }
+  }
+
+  Future logEvent(String name, {Map<String, dynamic> params = const {}}) async {
+    if (kReleaseMode) {
+      await _analytics.logEvent(
+        name: name,
+        parameters: params,
+      );
+    }
+  }
+
+  void setUserIdentifier(String userId) {
+    if (kReleaseMode) {
+      FirebaseCrashlytics.instance.setUserIdentifier(userId);
+      _analytics.setUserId(userId);
+    }
+  }
 }

lib/firebase/crashlytics.dart

@@ -0,0 +1,73 @@
+import 'package:firebase_crashlytics/firebase_crashlytics.dart';
+import 'package:flutter/foundation.dart';
+import 'package:logger/logger.dart';
+
+class CrashlyticsService {
+  static CrashlyticsService? _instance;
+
+  static CrashlyticsService getInstance() {
+    if (_instance == null) {
+      _instance = CrashlyticsService._(FirebaseCrashlytics.instance);
+    }
+
+    return _instance!;
+  }
+
+  final FirebaseCrashlytics _crashlyticsService;
+  CrashlyticsService._(
+    this._crashlyticsService,
+  );
+
+  void recordFlutterErrorToCrashlytics(FlutterErrorDetails details) {
+    _crashlyticsService.recordFlutterError(details);
+  }
+
+  Future logToCrashlytics(
+      Level level, List<String> lines, StackTrace stacktrace,
+      {required bool logwarnings}) async {
+    if (level == Level.error || level == Level.wtf) {
+      await _crashlyticsService.recordError(
+        lines.join('\n'),
+        stacktrace,
+        printDetails: true,
+        fatal: true,
+      );
+    }
+    if (level == Level.warning && logwarnings) {
+      await _crashlyticsService.recordError(
+        lines.join('\n'),
+        stacktrace,
+        printDetails: true,
+      );
+    }
+    if (level == Level.info || level == Level.verbose || level == Level.debug) {
+      await _crashlyticsService.log(lines.join('\n'));
+    }
+  }
+
+  Future setCustomKeysToTrack(String key, dynamic value) async {
+    await _crashlyticsService.setCustomKey(key, value);
+  }
+
+  // Be very careful when you excute this code it will crash the app
+  // So, be sure to remove it after usage
+  void crashApp() {
+    _crashlyticsService.crash();
+  }
+}
+
+class CrashlyticsOutput extends LogOutput {
+  final bool logWarnings;
+  CrashlyticsOutput({this.logWarnings = false});
+
+  @override
+  void output(OutputEvent event) {
+    try {
+      CrashlyticsService.getInstance().logToCrashlytics(
+          event.level, event.lines, StackTrace.current,
+          logwarnings: logWarnings);
+    } catch (e) {
+      print('CRASHLYTICS FAILED: $e');
+    }
+  }
+}

lib/ui/base/auth_viewmodel.dart

@@ -3,14 +3,16 @@ import 'package:feed/app/app.logger.dart';
 import 'package:feed/app/app.router.dart';
 import 'package:feed/core/enums/bottom_sheet.dart';
 import 'package:feed/core/services/user_service.dart';
+import 'package:feed/firebase/analytics.dart';
 import 'package:stacked/stacked.dart';
 import 'package:stacked_services/stacked_services.dart';
 
 abstract class AuthenticationViewModel extends BaseViewModel {
-  final BottomSheetService _bottomSheetService = locator<BottomSheetService>();
-  final SnackbarService _snackbarService = locator<SnackbarService>();
-  final NavigationService _navigationService = locator<NavigationService>();
-  final UserService _userService = locator<UserService>();
+  final _bottomSheetService = locator<BottomSheetService>();
+  final _snackbarService = locator<SnackbarService>();
+  final _navigationService = locator<NavigationService>();
+  final _userService = locator<UserService>();
+  final _analytics = locator<AnalyticsService>();
   final _log = getLogger("Authentication ViewModel");
 
   Future showConstraint({
@@ -61,6 +63,7 @@ abstract class AuthenticationViewModel extends BaseViewModel {
     _log.i(
         "User Login Successful : Logged in user: ${_userService.currentUser}");
     isProfileExists = await _userService.isUserProfileExists();
+    _analytics.logLogin();
 
     setBusy(false);