juice_auth_network

Integration glue between juice_auth and juice_network. Wires an AuthBloc into a FetchBloc so authenticated requests, 401 token refresh, and per-user cache isolation work without hand-written plumbing.

Why

juice_network's FetchBloc has three injection points for authentication, and juice_auth's AuthBloc owns exactly that state. This package connects them:

Without this package you'd hand-wire those three callbacks and reimplement the fire-and-forget → awaitable bridge for refresh. With it, it's three adapters.

Installation

dependencies:
  juice_auth: ^0.2.1
  juice_network: ^0.11.0
  juice_auth_network: ^0.1.0

Usage

import 'package:dio/dio.dart';
import 'package:juice_auth/juice_auth.dart';
import 'package:juice_network/juice_network.dart';
import 'package:juice_auth_network/juice_auth_network.dart';

// Your already-configured AuthBloc.
final authBloc = BlocScope.get<AuthBloc>();

// One Dio instance, shared so the refresh interceptor can retry on it.
final dio = Dio();

final fetchBloc = FetchBloc(
  storageBloc: storageBloc,
  dio: dio,
  // Per-user cache isolation: cached responses never leak across users.
  authIdentityProvider: AuthBlocIdentityProvider(authBloc).call,
);

fetchBloc.send(InitializeFetchEvent(
  config: FetchConfig(baseUrl: 'https://api.example.com'),
  interceptors: [
    // Injects the current access token on every request.
    AuthBlocAuthInterceptor(authBloc),
    // On 401: runs AuthBloc's singleflight refresh, retries with the new token.
    AuthBlocRefreshInterceptor(authBloc, dio: dio),
  ],
));

That's the whole integration. Requests now carry the live token, expired tokens refresh transparently, and the cache is scoped per authenticated user.

What each adapter does

AuthBlocIdentityProvider

Bridges AuthBloc to FetchBloc.authIdentityProvider. Returns the current user id (or null when unauthenticated). Pass it as provider.call.

AuthBlocAuthInterceptor

An AuthInterceptor whose tokenProvider reads authBloc.state.session?.accessToken on every request — so the token is always current and never stale after a refresh. Adds no header when there is no session. Accepts the usual AuthInterceptor knobs (headerName, prefix, skipAuth).

AuthBlocRefreshInterceptor / AuthBlocRefreshStrategy

AuthBlocRefreshInterceptor is a RefreshTokenInterceptor that, on a 401, drives AuthBloc.refreshToken() and retries the failed request with the new token. The bridge lives in AuthBlocRefreshStrategy: because AuthBloc.refreshToken() is fire-and-forget, the strategy watches the bloc's state stream and resolves with the new access token once the refresh completes (isRefreshing → false), or null if the session expires. Pass the same Dio instance you gave FetchBloc so the retried request goes through the same transport.

License

MIT License — see LICENSE for details.