token_interceptor.dart

import 'package:dio/dio.dart';
import 'package:skogluft/application/data/datasource/auth_local_data_store.dart';
import 'package:skogluft/application/data/datasource/auth_service.dart';
import 'package:skogluft/application/di/injection.dart';

class TokenInterceptor extends InterceptorsWrapper {
  TokenInterceptor({
    final InterceptorSuccessCallback? onResponse,
  }) : super(
          onRequest: (requestOptions, handler) async {
            final authStore = getIt<AuthLocalDataStore>();
            final token = await authStore.getAccessToken();
            if (token != null) {
              requestOptions.headers['Authorization'] = 'Bearer $token';
            }
            handler.next(requestOptions);
          },
          onResponse: onResponse,
          onError: (error, handler) async {
            if (error.response != null && error.response?.statusCode == 401) {
              final _dio = getIt<Dio>();
              _dio.interceptors.requestLock.lock();
              _dio.interceptors.responseLock.lock();

              final requestOptions = error.requestOptions;

              final authStore = getIt<AuthLocalDataStore>();
              final refreshToken = await authStore.getRefreshToken();
              final authModel = await AuthService(Dio()).refreshToken('Bearer $refreshToken');
              await authStore.storeAccessToken(authModel.authenticationResult.accessToken);

              _dio.interceptors.requestLock.unlock();
              _dio.interceptors.responseLock.unlock();
              final response = await _dio.fetch(requestOptions);
              handler.resolve(response);
            } else {
              handler.next(error);
            }
          },
        );
}