feat: import Chinese-localized Buzz source snapshot

Signed-off-by: cls_宁波本机 <908705107@qq.com>
2026-08-13 18:34:25 +08:00
parent 61c3fa1df9
commit 9dfa06ffee
3785 changed files with 1085458 additions and 2 deletions
@@ -0,0 +1,90 @@
+import 'dart:async';
+
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+import '../../shared/crypto/nip_oa.dart';
+import '../../shared/relay/relay.dart';
+import 'user_profile.dart';
+
+/// In-memory cache of user profiles, fetched in batches from the relay.
+///
+/// Lookups requested via [get] or [preload] are coalesced into a single
+/// kind:0 batch query (NIP-01 `authors` filter) every 50ms.
+class UserCacheNotifier extends Notifier<Map<String, UserProfile>> {
+  final Set<String> _pending = {};
+  Timer? _batchTimer;
+
+  @override
+  Map<String, UserProfile> build() {
+    ref.watch(relayConfigProvider);
+    ref.onDispose(() {
+      _batchTimer?.cancel();
+      _batchTimer = null;
+    });
+    return {};
+  }
+
+  /// Request a profile for [pubkey]. Returns immediately from cache if
+  /// available, otherwise schedules a batch fetch.
+  UserProfile? get(String pubkey) {
+    final cached = state[pubkey.toLowerCase()];
+    if (cached != null) return cached;
+    _scheduleFetch(pubkey.toLowerCase());
+    return null;
+  }
+
+  /// Preload profiles for a list of pubkeys (e.g. channel members).
+  void preload(List<String> pubkeys) {
+    final uncached = pubkeys
+        .map((pk) => pk.toLowerCase())
+        .where((pk) => !state.containsKey(pk) && !_pending.contains(pk))
+        .toList();
+    if (uncached.isEmpty) return;
+    _pending.addAll(uncached);
+    _batchTimer ??= Timer(const Duration(milliseconds: 50), _flushPending);
+  }
+
+  void _scheduleFetch(String pubkey) {
+    if (state.containsKey(pubkey) || _pending.contains(pubkey)) return;
+    _pending.add(pubkey);
+    _batchTimer ??= Timer(const Duration(milliseconds: 50), _flushPending);
+  }
+
+  Future<void> _flushPending() async {
+    _batchTimer = null;
+    if (_pending.isEmpty) return;
+
+    final pubkeys = _pending.toList();
+    _pending.clear();
+
+    try {
+      final session = ref.read(relaySessionProvider.notifier);
+      final events = await session.fetchHistory(
+        NostrFilters.profilesBatch(pubkeys),
+      );
+
+      final updated = Map<String, UserProfile>.from(state);
+      for (final event in events) {
+        final data = ProfileData.fromEvent(event);
+        final pk = data.pubkey.toLowerCase();
+        updated[pk] = UserProfile(
+          pubkey: pk,
+          displayName: data.displayName,
+          avatarUrl: data.avatarUrl,
+          about: data.about,
+          nip05Handle: data.nip05,
+          ownerPubkey: verifiedOaOwnerPubkey(event.tags, event.pubkey),
+        );
+      }
+
+      state = updated;
+    } catch (_) {
+      // Silently fail — we'll just show pubkeys.
+    }
+  }
+}
+
+final userCacheProvider =
+    NotifierProvider<UserCacheNotifier, Map<String, UserProfile>>(
+      UserCacheNotifier.new,
+    );