flutter_app_android/lib/presentation/widgets/custom/protected_widget.dart

import 'package:flutter/material.dart';
import 'package:provider/provider.dart';
import '../../providers/auth_provider.dart';
import '../../screens/auth/login_screen.dart';
import '../common/loading_indicator.dart';

class ProtectedWidget extends StatelessWidget {
  final Widget child;
  final Widget? loadingWidget;
  
  const ProtectedWidget({
    super.key,
    required this.child,
    this.loadingWidget,
  });
  
  @override
  Widget build(BuildContext context) {
    final authProvider = Provider.of<AuthProvider>(context);
    
    // 如果正在加载，显示loading
    if (authProvider.isLoading) {
      return loadingWidget ?? const LoadingIndicator();
    }
    
    // 如果未认证，显示登录页
    if (!authProvider.isAuthenticated) {
      return LoginScreen(
        onSuccess: () {
          // 登录成功后的回调
        },
      );
    }
    
    // 已认证，显示子组件
    return child;
  }
}