The renderer exposes six referentially-stable snapshot getters under the
v2.1.0 React-friendly pattern (SessionData / RoomSession / IgnoredUsers /
GroupBadges / RoomUserList / SoundVolumes), each invalidated by a
dedicated NitroEventType.*_UPDATED dispatch. Until now nothing on the
client consumed them — useExternalSnapshot existed as a useSyncExternalStore
wrapper but no widget was wired up to a snapshot.
Add thin consumer hooks under src/hooks/session/useSessionSnapshots.ts,
each a useExternalSnapshot wrapper around the matching subscribe+getter
pair:
- useUserDataSnapshot() → Readonly<IUserDataSnapshot>
- useActiveRoomSessionSnapshot() → Readonly<IRoomSessionSnapshot> | null
- useIgnoredUsersSnapshot() → ReadonlyArray<string>
- useIsUserIgnored(name) → boolean (useMemo over the array)
- useGroupBadgesSnapshot() → ReadonlyMap<number, string>
- useGroupBadge(groupId) → string (useMemo over the map)
- useVolumesSnapshot() → Readonly<ISoundVolumesSnapshot>
- useRoomUserListSnapshot() → ReadonlyArray<IRoomUserData>
Two design details worth noting:
- useRoomUserListSnapshot subscribes to BOTH ROOM_USER_LIST_UPDATED (for
join/leave/update inside a session) AND ROOM_SESSION_UPDATED (because
the underlying userDataManager reference flips when the active room
session changes). A single module-level frozen EMPTY_USER_LIST is the
fallback when no session is active, keeping reference stability across
reads in the no-room state.
- useIsUserIgnored / useGroupBadge memoize the scalar derivation so a
re-render only happens when the underlying snapshot reference flips,
not on unrelated useExternalSnapshot wake-ups.
These hooks unlock per-component snapshot consumption — widgets that
previously juggled addEventListener + useState pairs (or worse, read
GetSessionDataManager().userId directly and never re-rendered) can now
go through one of these and get reactivity for free. Migration of
existing consumers (useSessionInfo, AvatarInfoUtilities, etc.) is the
next pass.
Verification: yarn typecheck clean, yarn test 203/203, yarn build green.
simoleo89