feat: batch room meeting status queries into single bulk endpoint

Reduces rooms list page from 2N+2 HTTP requests to 1 POST request.
Backend: POST /v1/rooms/meetings/bulk-status with 3 DB queries total.
Frontend: @yornaath/batshit DataLoader-style batcher with 10ms window.

server/reflector/db/calendar_events.py

@@ -104,6 +104,26 @@ class CalendarEventController:
         results = await get_database().fetch_all(query)
         return [CalendarEvent(**result) for result in results]
 
+    async def get_upcoming_for_rooms(
+        self, room_ids: list[str], minutes_ahead: int = 120
+    ) -> list[CalendarEvent]:
+        now = datetime.now(timezone.utc)
+        future_time = now + timedelta(minutes=minutes_ahead)
+        query = (
+            calendar_events.select()
+            .where(
+                sa.and_(
+                    calendar_events.c.room_id.in_(room_ids),
+                    calendar_events.c.is_deleted == False,
+                    calendar_events.c.start_time <= future_time,
+                    calendar_events.c.end_time >= now,
+                )
+            )
+            .order_by(calendar_events.c.start_time.asc())
+        )
+        results = await get_database().fetch_all(query)
+        return [CalendarEvent(**result) for result in results]
+
     async def get_by_id(self, event_id: str) -> CalendarEvent | None:
         query = calendar_events.select().where(calendar_events.c.id == event_id)
         result = await get_database().fetch_one(query)

server/reflector/db/meetings.py

@@ -301,6 +301,23 @@ class MeetingController:
         results = await get_database().fetch_all(query)
         return [Meeting(**result) for result in results]
 
+    async def get_all_active_for_rooms(
+        self, room_ids: list[str], current_time: datetime
+    ) -> list[Meeting]:
+        query = (
+            meetings.select()
+            .where(
+                sa.and_(
+                    meetings.c.room_id.in_(room_ids),
+                    meetings.c.end_date > current_time,
+                    meetings.c.is_active,
+                )
+            )
+            .order_by(meetings.c.end_date.desc())
+        )
+        results = await get_database().fetch_all(query)
+        return [Meeting(**result) for result in results]
+
     async def get_active_by_calendar_event(
         self, room: Room, calendar_event_id: str, current_time: datetime
     ) -> Meeting | None:

server/reflector/db/rooms.py

@@ -245,6 +245,11 @@ class RoomController:
 
         return room
 
+    async def get_by_names(self, names: list[str]) -> list[Room]:
+        query = rooms.select().where(rooms.c.name.in_(names))
+        results = await get_database().fetch_all(query)
+        return [Room(**r) for r in results]
+
     async def get_ics_enabled(self) -> list[Room]:
         query = rooms.select().where(
             rooms.c.ics_enabled == True, rooms.c.ics_url != None

server/reflector/views/rooms.py

@@ -1,4 +1,6 @@
+import asyncio
 import logging
+from collections import defaultdict
 from datetime import datetime, timedelta, timezone
 from enum import Enum
 from typing import Annotated, Any, Literal, Optional
@@ -195,6 +197,63 @@ async def rooms_list(
     return paginated
 
 
+class BulkStatusRequest(BaseModel):
+    room_names: list[str]
+
+
+class RoomMeetingStatus(BaseModel):
+    active_meetings: list[Meeting]
+    upcoming_events: list[CalendarEventResponse]
+
+
+@router.post("/rooms/meetings/bulk-status", response_model=dict[str, RoomMeetingStatus])
+async def rooms_bulk_meeting_status(
+    request: BulkStatusRequest,
+    user: Annotated[Optional[auth.UserInfo], Depends(auth.current_user_optional)],
+):
+    user_id = user["sub"] if user else None
+
+    rooms = await rooms_controller.get_by_names(request.room_names)
+    room_by_id: dict[str, Any] = {r.id: r for r in rooms}
+    room_ids = list(room_by_id.keys())
+
+    current_time = datetime.now(timezone.utc)
+    active_meetings, upcoming_events = await asyncio.gather(
+        meetings_controller.get_all_active_for_rooms(room_ids, current_time),
+        calendar_events_controller.get_upcoming_for_rooms(room_ids),
+    )
+
+    # Group by room name
+    active_by_room: dict[str, list[Meeting]] = defaultdict(list)
+    for m in active_meetings:
+        room = room_by_id.get(m.room_id)
+        if not room:
+            continue
+        m.platform = room.platform
+        if user_id != room.user_id and m.platform == "whereby":
+            m.host_room_url = ""
+        active_by_room[room.name].append(m)
+
+    upcoming_by_room: dict[str, list[CalendarEventResponse]] = defaultdict(list)
+    for e in upcoming_events:
+        room = room_by_id.get(e.room_id)
+        if not room:
+            continue
+        if user_id != room.user_id:
+            e.description = None
+            e.attendees = None
+        upcoming_by_room[room.name].append(e)
+
+    result: dict[str, RoomMeetingStatus] = {}
+    for name in request.room_names:
+        result[name] = RoomMeetingStatus(
+            active_meetings=active_by_room.get(name, []),
+            upcoming_events=upcoming_by_room.get(name, []),
+        )
+
+    return result
+
+
 @router.get("/rooms/{room_id}", response_model=RoomDetails)
 async def rooms_get(
     room_id: str,