firewatch

Lightweight Firestore repositories for Flutter.

• 🔁 Auth-reactive: attach/detach on UID changes via any ValueListenable<String?>
• ⚡ Instant UI: primes from local cache; then streams live updates
• 🪶 Small surface area: single-doc + collection repos
• 📜 Live window pagination: grow with loadMore(), reset via resetPages()
• 🧩 No auth lock-in: bring your own auth listenable

Install

dependencies:
  firewatch:

Quick start

Firewatch repositories are built to work seamlessly with watch_it. Here’s the minimal flow: Model → Repository → UI.

---

1. Define your model

Firestore-backed models must implement JsonModel so Firewatch can inject the document ID.

class UserProfile implements JsonModel {
  @override
  final String id;
  final String name;

  UserProfile({required this.id, required this.name});

  factory UserProfile.fromJson(Map<String, dynamic> json) => UserProfile(
        id: json['id'] as String,
        name: json['name'] as String? ?? 'Anonymous',
      );

  @override
  Map<String, dynamic> toJson() => {'name': name};
}

---

2. Create your repositories

Repositories bind models to Firestore. Provide authUid (a ValueListenable<String?>) so Firewatch knows which document/collection to read.

final authUid = ValueNotifier<String?>(null); // wire this to your auth layer

class UserProfileRepository extends FirestoreDocRepository<UserProfile> {
  UserProfileRepository()
      : super(
          fromJson: UserProfile.fromJson,
          docRefBuilder: (fs, uid) => fs.doc('users/$uid'),
          authUid: authUid,
        );
}

class FriendsRepository extends FirestoreCollectionRepository<UserProfile> {
  FriendsRepository()
      : super(
          fromJson: UserProfile.fromJson,
          colRefBuilder: (fs, uid) => fs.collection('users/$uid/friends'),
          authUid: authUid,
        );
}

---

3. Consume in the UI with watch_it

Because repositories are ValueNotifiers, you can watch them directly in your widgets.

class ProfileCard extends StatelessWidget {
  const ProfileCard({super.key});

  @override
  Widget build(BuildContext context) {
    final profile = watchIt<UserProfileRepository>().value;
    final friends = watchIt<FriendsRepository>().value;

    if (profile == null) {
      return const Center(child: CircularProgressIndicator());
    }

    return Card(
      child: ListTile(
        title: Text('User: ${profile.name}'),
        subtitle: Text('Friends: ${friends.length}'),
      ),
    );
  }
}

---

👉 For a full runnable demo (with auth wiring and fake Firestore), check out the example/ app in this repo.

Bring your own Auth

Firewatch accepts any ValueListenable<String?> that yields the current user UID. Update it on sign-in/out and the repos will re-attach.

authUid.value = 'abc123'; // sign in
authUid.value = null; // sign out

Commands API

Both repos expose command_it async commands:

profileRepo.write(UserProfile(id: 'abc123', displayName: 'Marty'));
profileRepo.patch({'bio': 'Hello'});

friendsRepo.add({'displayName': 'Alice'});
friendsRepo.delete(id!);

UI State

• isLoading: true while fetching/refreshing
• hasInitialized (collections): first load completed
• hasMore (collections): whether loadMore() can grow the window
• notifierFor(docId): get a pre-soaked ValueNotifier<T?> for a specific item

Documentation

License

MIT - See LICENSE