router_helper.dart

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import 'package:flutter/material.dart';
import 'package:flutter_bloc/flutter_bloc.dart';
import '../../features/authentication/presentation/logic/authentication_bloc/authentication_bloc.dart';
import '../../features/authentication/domain/entities/session_entity.dart';
 
extension RouterContextExtension on BuildContext {
  SessionEntity? get session {
    final authState = read<AuthenticationBloc>().state;
    return authState is AuthenticatedState ? authState.session : null;
  }
 
  T withSession<T>({
    required T Function(SessionEntity session) authenticated,
    Widget Function()? unauthenticated,
  }) {
    final currentSession = session;
    if (currentSession != null) {
      return authenticated(currentSession);
    }
    if (unauthenticated != null) {
      return unauthenticated() as T;
    }
    throw Exception('Unauthenticated access');
  }
}