70 lines
2.3 KiB
Dart
70 lines
2.3 KiB
Dart
import 'package:im_app/app/di/user_provider.dart';
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import 'package:riverpod_annotation/riverpod_annotation.dart';
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import 'package:im_app/data/local/drift/app_database.dart';
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import 'package:im_app/domain/entities/user.dart';
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import 'package:im_app/domain/repositories/user_repository.dart';
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part 'user_notifier.g.dart';
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/// 单个用户状态管理 (family — 每个 uid 独立 notifier)
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///
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/// ## 用法
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/// ```dart
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/// // 监听 — 自动重建
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/// final userAsync = ref.watch(userNotifierProvider(123));
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///
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/// // 即时读取，无需 await
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/// final user = ref.read(userNotifierProvider(123).notifier).current;
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///
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/// // 部分更新
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/// ref.read(userNotifierProvider(123).notifier).updateFields(
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/// UsersCompanion(nickname: Value('New Name')),
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/// );
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/// ```
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@riverpod
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class UserNotifier extends _$UserNotifier {
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User? _cached;
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UserRepository get _repo => ref.watch(userRepositoryProvider);
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@override
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Future<User?> build(int uid) async {
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ref.onDispose(() => _cached = null);
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// Stream starts automatically — uid is the family arg
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_repo.watchUser(uid).listen((user) {
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_cached = user;
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state = AsyncData(user);
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});
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// Return initial DB value
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return _repo.getUser(uid);
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}
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// ── 即时访问，无需 await ──────────────────────────────────────────────────
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User? get current => _cached;
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// ── 写入 ─────────────────────────────────────────────────────────────────
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Future<void> saveUser(User user) async {
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await _repo.saveUser(user);
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}
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Future<void> updateFields(UsersCompanion companion) async {
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await _repo.updateFields(uid, companion); // uid from build arg
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}
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Future<void> updateUser(User user) async {
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await _repo.saveUser(user);
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}
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// ── 删除 ─────────────────────────────────────────────────────────────────
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Future<void> deleteUser() async {
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await _repo.deleteUser(uid);
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_cached = null;
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state = const AsyncData(null);
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}
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}
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