Реал-тайм через SSE (push-to-invalidate): живые приглашения/партии, авто-обновление без перезагрузки

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

backend/app/routers/admin.py

@@ -20,6 +20,7 @@ from app.services import (
     audit_service,
     faction_service,
     match_service,
+    notify,
     user_service,
 )
 
@@ -240,6 +241,7 @@ def update_match(
         ip=request.client.host if request.client else None,
     )
     session.commit()
+    notify.match_changed(session, match)
     return build_match_read(session, match, can_modify=True)
 
 
@@ -289,12 +291,14 @@ def delete_match(
     session: Session = Depends(get_session),
     admin: User = Depends(get_current_admin),
 ) -> s.OkResponse:
+    group_id = match_service.get_match(session, match_id).group_id  # для уведомления
     admin_service.delete_match(session, match_id)
     audit_service.record(
         session, actor_id=admin.id, action="delete", entity_type="match", entity_id=match_id,
         ip=request.client.host if request.client else None,
     )
     session.commit()
+    notify.match_removed(session, match_id, group_id)
     return s.OkResponse()
 
 
@@ -330,6 +334,7 @@ def admin_add_attachment(
     att = attachment_service.add_photo(
         session, match, admin, content, ext, user_service.avatar_media_type(ext)
     )
+    notify.match_changed(session, match)
     return attachment_read(att, f"/api/admin/matches/{match_id}")
 
 
@@ -342,6 +347,7 @@ def admin_delete_attachment(
 ) -> s.OkResponse:
     match = match_service.get_match(session, match_id)
     attachment_service.delete(session, match, attachment_id)
+    notify.match_changed(session, match)
     return s.OkResponse()
 
 

backend/app/routers/events.py

@@ -0,0 +1,45 @@
+"""SSE: поток событий «данные изменились» для текущего пользователя.
+
+Клиент (EventSource) держит одно соединение и по событию точечно перезапрашивает данные
+(push-to-invalidate). Мутации остаются обычным REST.
+"""
+from __future__ import annotations
+
+import asyncio
+import json
+
+from fastapi import APIRouter, Depends, Request
+from fastapi.responses import StreamingResponse
+
+from app.auth.deps import get_current_user
+from app.core.events import hub
+from app.models import User
+
+router = APIRouter(tags=["events"])
+
+_HEARTBEAT_SECONDS = 25
+
+
+@router.get("/events")
+async def events(request: Request, user: User = Depends(get_current_user)) -> StreamingResponse:
+    queue = hub.subscribe(user.id)  # type: ignore[arg-type]
+
+    async def stream():
+        try:
+            yield ": connected\n\n"
+            while True:
+                if await request.is_disconnected():
+                    break
+                try:
+                    event = await asyncio.wait_for(queue.get(), timeout=_HEARTBEAT_SECONDS)
+                    yield f"data: {json.dumps(event, ensure_ascii=False)}\n\n"
+                except asyncio.TimeoutError:
+                    yield ": ping\n\n"  # heartbeat против idle-таймаутов прокси/туннеля
+        finally:
+            hub.unsubscribe(user.id, queue)  # type: ignore[arg-type]
+
+    return StreamingResponse(
+        stream(),
+        media_type="text/event-stream",
+        headers={"Cache-Control": "no-cache", "X-Accel-Buffering": "no"},
+    )

backend/app/routers/groups.py

@@ -14,6 +14,7 @@ from app.services import (
     group_service,
     invitation_service,
     membership_service,
+    notify,
     stats_service,
 )
 
@@ -153,6 +154,7 @@ def invite_member(
         user_agent=request.headers.get("user-agent"),
     )
     session.commit()
+    notify.invitations_changed(invited.id)  # type: ignore[arg-type]  # живое появление у получателя
     return s.InvitationRead(
         id=inv.id,  # type: ignore[arg-type]
         group_id=group_id,
@@ -174,6 +176,7 @@ def remove_member(
     group_service.assert_member(session, group_id, user.id)  # type: ignore[arg-type]
     group = group_service.get_group(session, group_id)
     membership_service.remove_member(session, group, user_id)
+    notify.group_changed(session, group_id, extra_user_ids=[user_id])  # + удалённому
     return s.OkResponse()
 
 

backend/app/routers/invitations.py

@@ -8,7 +8,7 @@ from app.auth.deps import get_current_user
 from app.db.session import get_session
 from app.models import User
 from app.schemas import api as s
-from app.services import invitation_service
+from app.services import invitation_service, notify
 
 router = APIRouter(prefix="/invitations", tags=["invitations"])
 
@@ -27,7 +27,9 @@ def accept_invitation(
     session: Session = Depends(get_session),
     user: User = Depends(get_current_user),
 ) -> s.OkResponse:
-    invitation_service.accept(session, user, invitation_id)
+    group = invitation_service.accept(session, user, invitation_id)
+    notify.invitations_changed(user.id)  # type: ignore[arg-type]
+    notify.group_changed(session, group.id)  # type: ignore[arg-type]  # новый участник
     return s.OkResponse()
 
 
@@ -38,4 +40,5 @@ def decline_invitation(
     user: User = Depends(get_current_user),
 ) -> s.OkResponse:
     invitation_service.decline(session, user, invitation_id)
+    notify.invitations_changed(user.id)  # type: ignore[arg-type]
     return s.OkResponse()

backend/app/routers/matches.py

@@ -16,6 +16,7 @@ from app.services import (
     audit_service,
     group_service,
     match_service,
+    notify,
     user_service,
 )
 from app.services.match_service import FinishInput, ParticipantInput, RosterInput
@@ -119,6 +120,7 @@ def start_match(
         user_agent=request.headers.get("user-agent"),
     )
     session.commit()
+    notify.match_changed(session, match)
     return build_match_read(session, match, can_modify=match_service.can_modify(session, match, user))
 
 
@@ -157,6 +159,7 @@ def finish_match(
         user_agent=request.headers.get("user-agent"),
     )
     session.commit()
+    notify.match_changed(session, match)
     return build_match_read(session, match, can_modify=match_service.can_modify(session, match, user))
 
 
@@ -214,6 +217,7 @@ def update_match(
         user_agent=request.headers.get("user-agent"),
     )
     session.commit()
+    notify.match_changed(session, match)
     return build_match_read(session, match, can_modify=match_service.can_modify(session, match, user))
 
 
@@ -243,6 +247,7 @@ def add_attachment(
     att = attachment_service.add_photo(
         session, match, user, content, ext, user_service.avatar_media_type(ext)
     )
+    notify.match_changed(session, match)
     return attachment_read(att, f"/api/matches/{match_id}")
 
 
@@ -256,6 +261,7 @@ def delete_attachment(
     match = match_service.get_match(session, match_id)
     _assert_can_attach(session, match, user)
     attachment_service.delete(session, match, attachment_id)
+    notify.match_changed(session, match)
     return s.OkResponse()
 
 
@@ -301,4 +307,5 @@ def delete_match(
         user_agent=request.headers.get("user-agent"),
     )
     session.commit()
+    notify.match_removed(session, match_id_val, group_id_val)  # type: ignore[arg-type]
     return s.OkResponse()