local_first_hive_storage 0.2.0

Hive adapter for local_first: schema-less, offline-first storage with Hive boxes and metadata support.

local_first_hive_storage

Child package of the local_first ecosystem. This Hive adapter provides schema-less, offline-first storage using Hive boxes, plus metadata support and reactive queries.

Supported config type	Example
bool	true
int	42
double	3.14
String	'hello'
List<String>	['a', 'b']

Why use this adapter?

• Fast key/value storage with Hive.
• Schema-less: store your model maps directly, no column definitions needed.
• Namespaces for multi-user isolation (useNamespace).
• Reactive queries via watchQuery.
• Metadata storage via setConfigValue / getConfigValue.

Installation

Add the core and the Hive adapter to your pubspec.yaml:

dependencies:
  local_first: ^0.5.0
  local_first_hive_storage: ^0.1.0

Quick start

import 'package:local_first/local_first.dart';
import 'package:local_first_hive_storage/local_first_hive_storage.dart';

// Keep your model immutable; LocalFirstEvent wraps it with sync metadata.
class Todo {
  const Todo({
    required this.id,
    required this.title,
    required this.updatedAt,
  });

  final String id;
  final String title;
  final DateTime updatedAt;

  JsonMaptoJson() => {
        'id': id,
        'title': title,
        'updated_at': updatedAt.toUtc().toIso8601String(),
      };

  factory Todo.fromJson(JsonMapjson) => Todo(
        id: json['id'] as String,
        title: json['title'] as String,
        updatedAt: DateTime.parse(json['updated_at']).toUtc(),
      );

  static Todo resolveConflict(Todo local, Todo remote) =>
      local.updatedAt.isAfter(remote.updatedAt) ? local : remote;
}

final todoRepository = LocalFirstRepository<Todo>.create(
  name: 'todo',
  getId: (todo) => todo.id,
  toJson: (todo) => todo.toJson(),
  fromJson: Todo.fromJson,
  onConflict: Todo.resolveConflict,
);

Future<void> main() async {
  final client = LocalFirstClient(
    repositories: [todoRepository],
    localStorage: HiveLocalFirstStorage(),
    syncStrategies: [
      // Provide your own strategy implementing DataSyncStrategy.
    ],
  );

  await client.initialize();
  await todoRepository.upsert(
    Todo(
      id: '1',
      title: 'Buy milk',
      updatedAt: DateTime.now().toUtc(),
    ),
    needSync: true,
  );
}

Features

• Schema-less Hive boxes (lazy boxes supported via lazyCollections).
• Namespaced storage with useNamespace.
• Reactive queries (watchQuery) and standard CRUD operations.
• Metadata table for app/client state (setConfigValue / getConfigValue).

Testing

Run tests from this package root:

flutter test

Example app

This package ships the same demo app used across the ecosystem. To run it:

cd local_first_hive_storage/example
flutter run

Contributing

Please read the contribution guidelines in the root project before opening issues or PRs: see ../CONTRIBUTING.md.

License

MIT (see LICENSE).