feat: 添加用户行为分析功能

apps/lib/features/auth/presentation/bloc/auth_bloc.dart

@@ -1,4 +1,5 @@
 import 'package:flutter_bloc/flutter_bloc.dart';
+import '../../../../core/analytics/tracker.dart';
 import '../../../../core/logging/logger.dart';
 import '../../data/repositories/auth_repository.dart';
 import 'auth_event.dart';
@@ -7,6 +8,7 @@ import 'auth_state.dart';
 class AuthBloc extends Bloc<AuthEvent, AuthState> {
   final AuthRepository _repository;
   final Logger _logger = getLogger('features.auth.bloc');
+  DateTime? _loginTime;
 
   AuthBloc(this._repository) : super(AuthInitial()) {
     on<AuthStarted>(_onStarted);
@@ -21,6 +23,8 @@ class AuthBloc extends Bloc<AuthEvent, AuthState> {
       final refreshToken = await _repository.getRefreshToken();
       if (refreshToken != null) {
         final response = await _repository.refreshSession(refreshToken);
+        _loginTime = DateTime.now();
+        AnalyticsTracker.instance.setUserId(response.user.id);
         emit(
           AuthAuthenticated(
             user: AuthUser(id: response.user.id, phone: response.user.phone),
@@ -56,6 +60,7 @@ class AuthBloc extends Bloc<AuthEvent, AuthState> {
   }
 
   void _onLoggedIn(AuthLoggedIn event, Emitter<AuthState> emit) {
+    _loginTime = DateTime.now();
     _logger.info(message: 'User logged in', extra: {'user_id': event.user.id});
     emit(AuthAuthenticated(user: event.user));
   }
@@ -64,6 +69,9 @@ class AuthBloc extends Bloc<AuthEvent, AuthState> {
     AuthLoggedOut event,
     Emitter<AuthState> emit,
   ) async {
+    final sessionDuration = _loginTime != null
+        ? DateTime.now().difference(_loginTime!).inSeconds
+        : null;
     try {
       await _repository.deleteSession();
       _logger.info(message: 'User logged out');
@@ -74,6 +82,11 @@ class AuthBloc extends Bloc<AuthEvent, AuthState> {
         stackTrace: stackTrace,
       );
     } finally {
+      AnalyticsTracker.instance.trackLogout(
+        reason: 'manual',
+        sessionDurationS: sessionDuration,
+      );
+      _loginTime = null;
       emit(
         const AuthUnauthenticated(reason: AuthUnauthenticatedReason.signedOut),
       );
@@ -84,6 +97,9 @@ class AuthBloc extends Bloc<AuthEvent, AuthState> {
     AuthSessionInvalidated event,
     Emitter<AuthState> emit,
   ) async {
+    final sessionDuration = _loginTime != null
+        ? DateTime.now().difference(_loginTime!).inSeconds
+        : null;
     _logger.warning(message: 'Session invalidated by server');
     try {
       await _repository.clearSessionLocalOnly();
@@ -94,6 +110,11 @@ class AuthBloc extends Bloc<AuthEvent, AuthState> {
         stackTrace: stackTrace,
       );
     } finally {
+      AnalyticsTracker.instance.trackLogout(
+        reason: 'expired',
+        sessionDurationS: sessionDuration,
+      );
+      _loginTime = null;
       emit(
         const AuthUnauthenticated(reason: AuthUnauthenticatedReason.expired),
       );