hive_cache 2.0.0

A persistent cache that uses hive.

example/lib/main.dart

import 'dart:convert';

import 'package:flutter/widgets.dart';
import 'package:hive_cache/hive_cache.dart';
import 'package:http/http.dart' as http;
import 'package:meta/meta.dart';

class Person implements Entity<Person> {
  Person({
    @required this.id,
    @required this.firstName,
    @required this.lastName,
  }) : friends = Collection<Person>(
          id: 'friends of $id',
          fetcher: () async => json
              .decode(await http.read('.../$id/friends'))
              .map(Person.fromJson),
        );

  final Id<Person> id;
  final String firstName;
  final String lastName;
  final Collection<Person> friends;

  static Future<Person> fetch(Id<Person> id) async =>
      Person.fromJson(json.decode(await http.read('.../$id')));

  static Person fromJson(Map<String, dynamic> data) {
    return Person(
      id: Id<Person>(data['id']),
      firstName: data['firstName'],
      lastName: data['lastName'],
    );
  }

  String toString() => '$firstName $lastName';
}

void main() async {
  await HiveCache.initialize();

  HiveCache
    // The PersonAdapter will get generated by hive_generator.
    // ignore: undefined_function
    ..registerEntityType(PersonAdapter(), Person.fetch);

  // ...
  // In some build method:

  // ignore: return_of_invalid_type
  return EntityBuilder<Person>(
    id: Id<Person>('abc'),
    builder: (context, snapshot, fetch) {
      return Text(snapshot.data?.toString() ?? 'Loading…');
    },
  );
}