bannzai/async_value_group

Features

async_value_group is a a Dart library for grouping some riverpod AsyncValues into single AsyncValue.

• Grouping some AsyncValues into single AsyncValue and retrieve all AsyncValue.data as a tuple.
• Waiting to be done multiple asynchronous process.
• If you use hooks_riverpod, call AsyncValue.when only once in Widget.build method even if multiple AsyncValues are required.

Usage

import 'package:flutter/material.dart';
import 'package:hooks_riverpod/hooks_riverpod.dart';
import 'package:async_value_group/async_value_group.dart';

class TweetsPage extends HookConsumerWidget {
  const TweetsPage({Key? key}) : super(key: key);

  @override
  Widget build(BuildContext context, WidgetRef ref) {
    return AsyncValueGroup.group2(
      ref.watch(tweetsProvider),
      ref.watch(userProvider),
    ).when(
      data: (t) => t.$1.isEmpty ? const TweetsEmpty() : TweetsBody(tweets: t.$1, user: t.$2),
      error: (error, st) => ErrorPage(error: error),
      loading: () => const Loading(),
    );
  }
}