feat: import Chinese-localized Buzz source snapshot

Signed-off-by: cls_宁波本机 <908705107@qq.com>

mobile/lib/features/activity/activity_provider.dart

@@ -0,0 +1,337 @@
+import 'dart:async';
+
+import 'package:flutter/foundation.dart';
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+import '../../shared/relay/relay.dart';
+import '../channels/channel.dart';
+import '../channels/channels_provider.dart';
+import 'feed_item.dart';
+import 'inbox_item.dart';
+
+/// Builds the Activity inbox feed over the relay websocket.
+///
+/// Sources mirror desktop's Home inbox (`useHomeFeedQuery` + `get_feed`):
+/// - mentions of me on user-visible channel kinds (also yields thread
+///   replies, which the thread filter classifies from NIP-10 tags)
+/// - workflow approvals / needs-action events addressed to me
+/// - agent job lifecycle events addressed to me (kinds 43001-43006)
+/// - recent DM messages from others (desktop surfaces DMs through p-tags;
+///   mobile queries DM channels directly so untagged DM sends still appear)
+class ActivityNotifier extends AsyncNotifier<HomeFeedResponse> {
+  static const _addressedKinds = [
+    1,
+    9,
+    40002,
+    43001,
+    43002,
+    43003,
+    43004,
+    43005,
+    43006,
+    45001,
+    45003,
+    46010,
+    46011,
+    46012,
+  ];
+
+  void Function()? _unsubscribeAddressed;
+  void Function()? _unsubscribeDms;
+  Timer? _liveRefreshTimer;
+  Future<void>? _refreshInFlight;
+  int? _refreshGeneration;
+  bool _refreshQueued = false;
+  int _subscriptionGeneration = 0;
+
+  @override
+  Future<HomeFeedResponse> build() async {
+    ref.watch(relayConfigProvider);
+    final sessionState = ref.watch(relaySessionProvider);
+    // React to the DM channel set (loading → data, membership changes) so a
+    // cold start where channels resolve after the first fetch still surfaces
+    // DMs without a manual refresh.
+    ref.watch(channelsProvider.select(_dmChannelKey));
+
+    final generation = ++_subscriptionGeneration;
+    _clearLiveSubscriptions();
+    ref.onDispose(() {
+      _subscriptionGeneration += 1;
+      _clearLiveSubscriptions();
+    });
+
+    final response = await _fetch();
+    if (sessionState.status == SessionStatus.connected &&
+        generation == _subscriptionGeneration) {
+      unawaited(_subscribeLive(generation));
+    }
+    return response;
+  }
+
+  Future<void> _subscribeLive(int generation) async {
+    final myPk = ref.read(myPubkeyProvider);
+    if (myPk == null || generation != _subscriptionGeneration) return;
+
+    final session = ref.read(relaySessionProvider.notifier);
+    final since = DateTime.now().millisecondsSinceEpoch ~/ 1000 - 5;
+    try {
+      final unsubscribeAddressed = await session.subscribe(
+        NostrFilter(
+          kinds: _addressedKinds,
+          tags: {
+            '#p': [myPk],
+          },
+          since: since,
+          limit: 100,
+        ),
+        (_) => _scheduleLiveRefresh(generation),
+      );
+      if (generation != _subscriptionGeneration) {
+        unsubscribeAddressed();
+        return;
+      }
+      _unsubscribeAddressed = unsubscribeAddressed;
+
+      final dmChannelIds = [
+        for (final channel
+            in ref.read(channelsProvider).asData?.value ?? const <Channel>[])
+          if (channel.isDm && channel.isMember) channel.id,
+      ];
+      if (dmChannelIds.isEmpty) return;
+
+      final unsubscribeDms = await session.subscribe(
+        NostrFilter(
+          kinds: const [9],
+          tags: {'#h': dmChannelIds},
+          since: since,
+          limit: 100,
+        ),
+        (_) => _scheduleLiveRefresh(generation),
+      );
+      if (generation != _subscriptionGeneration) {
+        unsubscribeDms();
+        return;
+      }
+      _unsubscribeDms = unsubscribeDms;
+    } catch (error) {
+      if (generation == _subscriptionGeneration) {
+        debugPrint('[ActivityNotifier] live subscription failed: $error');
+      }
+    }
+  }
+
+  void _scheduleLiveRefresh(int generation) {
+    if (generation != _subscriptionGeneration) return;
+    _liveRefreshTimer?.cancel();
+    _liveRefreshTimer = Timer(
+      const Duration(milliseconds: 50),
+      () => unawaited(_queueRefresh(generation)),
+    );
+  }
+
+  Future<void> _queueRefresh(int generation) {
+    if (generation != _subscriptionGeneration) return Future.value();
+    _refreshQueued = true;
+    final inFlight = _refreshInFlight;
+    if (_refreshGeneration == generation && inFlight != null) {
+      return inFlight;
+    }
+
+    _refreshGeneration = generation;
+    final future = _drainRefreshQueue(generation);
+    _refreshInFlight = future;
+    return future;
+  }
+
+  Future<void> _drainRefreshQueue(int generation) async {
+    try {
+      do {
+        _refreshQueued = false;
+        try {
+          final next = await _fetch();
+          if (generation != _subscriptionGeneration) return;
+          state = AsyncData(next);
+        } catch (error) {
+          if (generation != _subscriptionGeneration) return;
+          debugPrint(
+            '[ActivityNotifier] inbox refresh failed; retaining feed: $error',
+          );
+        }
+      } while (_refreshQueued && generation == _subscriptionGeneration);
+    } finally {
+      if (_refreshGeneration == generation) {
+        _refreshInFlight = null;
+        _refreshGeneration = null;
+        _refreshQueued = false;
+      }
+    }
+  }
+
+  void _clearLiveSubscriptions() {
+    _liveRefreshTimer?.cancel();
+    _liveRefreshTimer = null;
+    _refreshInFlight = null;
+    _refreshGeneration = null;
+    _refreshQueued = false;
+    _unsubscribeAddressed?.call();
+    _unsubscribeAddressed = null;
+    _unsubscribeDms?.call();
+    _unsubscribeDms = null;
+  }
+
+  /// Stable identity for the joined DM channel set: null while channels are
+  /// loading, otherwise the sorted member-DM ids. Keeps unrelated channel
+  /// updates from refetching the feed.
+  static String? _dmChannelKey(AsyncValue<List<Channel>> channels) {
+    final value = channels.asData?.value;
+    if (value == null) return null;
+    final ids = [
+      for (final channel in value)
+        if (channel.isDm && channel.isMember) channel.id,
+    ]..sort();
+    return ids.join(',');
+  }
+
+  Future<HomeFeedResponse> _fetch() async {
+    final myPk = ref.read(myPubkeyProvider);
+    if (myPk == null) {
+      return HomeFeedResponse(
+        mentions: const [],
+        needsAction: const [],
+        activity: const [],
+        agentActivity: const [],
+      );
+    }
+
+    final session = ref.read(relaySessionProvider.notifier);
+
+    // DM channels come from the channel list; while it is still loading the
+    // DM source is skipped, and build() rebuilds when it resolves (see the
+    // channelsProvider watch above).
+    final dmChannelIds = [
+      for (final channel
+          in ref.read(channelsProvider).asData?.value ?? const <Channel>[])
+        if (channel.isDm && channel.isMember) channel.id,
+    ];
+
+    final results = await Future.wait([
+      // Mentions of me on user-visible channel content.
+      session.fetchHistory(
+        NostrFilter(
+          kinds: const [9, 40002, 1, 45001, 45003],
+          tags: {
+            '#p': [myPk],
+          },
+          limit: 50,
+        ),
+      ),
+      // Workflow approvals addressed to me.
+      session.fetchHistory(
+        NostrFilter(
+          kinds: const [46010, 46011, 46012],
+          tags: {
+            '#p': [myPk],
+          },
+          limit: 20,
+        ),
+      ),
+      // Agent job lifecycle events addressed to me.
+      session.fetchHistory(
+        NostrFilter(
+          kinds: const [43001, 43002, 43003, 43004, 43005, 43006],
+          tags: {
+            '#p': [myPk],
+          },
+          limit: 20,
+        ),
+      ),
+      // Recent DM traffic (filtered to other senders below).
+      if (dmChannelIds.isEmpty)
+        Future.value(const <NostrEvent>[])
+      else
+        session.fetchHistory(
+          NostrFilter(kinds: const [9], tags: {'#h': dmChannelIds}, limit: 30),
+        ),
+    ]);
+
+    bool isFromOther(NostrEvent e) =>
+        e.pubkey.toLowerCase() != myPk.toLowerCase();
+
+    // Dedupe across sources by event id, keeping the higher-priority
+    // category (needs_action > mention > agent_activity > activity).
+    final byId = <String, FeedItem>{};
+    void add(Iterable<NostrEvent> events, String category) {
+      for (final event in events) {
+        final existing = byId[event.id];
+        if (existing != null &&
+            categoryPriority(existing.category) <= categoryPriority(category)) {
+          continue;
+        }
+        byId[event.id] = _feedItem(event, category: category);
+      }
+    }
+
+    add(results[1], 'needs_action');
+    add(results[0].where(isFromOther), 'mention');
+    add(results[2], 'agent_activity');
+    add(results[3].where(isFromOther), 'activity');
+
+    final items = byId.values.toList()
+      ..sort((a, b) => b.createdAt.compareTo(a.createdAt));
+
+    return HomeFeedResponse(
+      mentions: [
+        for (final i in items)
+          if (i.category == 'mention') i,
+      ],
+      needsAction: [
+        for (final i in items)
+          if (i.category == 'needs_action') i,
+      ],
+      activity: [
+        for (final i in items)
+          if (i.category == 'activity') i,
+      ],
+      agentActivity: [
+        for (final i in items)
+          if (i.category == 'agent_activity') i,
+      ],
+    );
+  }
+
+  FeedItem _feedItem(NostrEvent event, {required String category}) {
+    return FeedItem(
+      id: event.id,
+      kind: event.kind,
+      pubkey: event.pubkey,
+      content: event.content,
+      createdAt: event.createdAt,
+      channelId: event.channelId,
+      channelName: '',
+      tags: event.tags,
+      category: category,
+    );
+  }
+
+  Future<void> refresh() async {
+    await _queueRefresh(_subscriptionGeneration);
+  }
+}
+
+final activityProvider =
+    AsyncNotifierProvider<ActivityNotifier, HomeFeedResponse>(
+      ActivityNotifier.new,
+    );
+
+/// Conversation-grouped inbox rows derived from the raw feed. DM messages
+/// group by DM channel so one conversation renders as one row.
+final inboxItemsProvider = Provider<List<InboxItem>>((ref) {
+  final feed = ref.watch(activityProvider).value;
+  if (feed == null) return const [];
+  final dmChannelIds = {
+    for (final channel
+        in ref.watch(channelsProvider).asData?.value ?? const <Channel>[])
+      if (channel.isDm) channel.id,
+  };
+  return buildInboxItems(feed.all, isDmChannel: dmChannelIds.contains);
+});