import 'package:flutter_riverpod/flutter_riverpod.dart';

class DemoState {
  const DemoState({this.count = 0, this.query = ''});

  final int count;
  final String query;

  DemoState copyWith({int? count, String? query}) {
    return DemoState(count: count ?? this.count, query: query ?? this.query);
  }
}

class DemoController extends Notifier<DemoState> {
  @override
  DemoState build() => const DemoState();

  void increment() {
    state = state.copyWith(count: state.count + 1);
  }

  void updateQuery(String query) {
    state = state.copyWith(query: query);
  }
}

final demoControllerProvider = NotifierProvider<DemoController, DemoState>(
  DemoController.new,
);