p0: harden realtime reconciliation and revoke-all token invalidation

alembic/versions/0022_user_access_revoked_before.py

@@ -0,0 +1,26 @@
+"""add access token revoke marker for users
+
+Revision ID: 0022_user_access_revoked_before
+Revises: 0021_chat_avatar_url
+Create Date: 2026-03-08
+"""
+
+from collections.abc import Sequence
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = "0022_user_access_revoked_before"
+down_revision: str | None = "0021_chat_avatar_url"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    op.add_column("users", sa.Column("access_revoked_before", sa.DateTime(timezone=True), nullable=True))
+
+
+def downgrade() -> None:
+    op.drop_column("users", "access_revoked_before")

app/auth/router.py

@@ -168,8 +168,11 @@ async def revoke_session(jti: str, current_user: User = Depends(get_current_user
 
 
 @router.delete("/sessions", status_code=status.HTTP_204_NO_CONTENT)
-async def revoke_all_sessions(current_user: User = Depends(get_current_user)) -> None:
-    await revoke_all_user_sessions(user_id=current_user.id)
+async def revoke_all_sessions(
+    db: AsyncSession = Depends(get_db),
+    current_user: User = Depends(get_current_user),
+) -> None:
+    await revoke_all_user_sessions(db, user_id=current_user.id)
 
 
 @router.post("/2fa/setup", response_model=TwoFactorSetupRead)

app/auth/service.py

@@ -212,8 +212,30 @@ async def revoke_user_session(*, user_id: int, jti: str) -> None:
     await revoke_refresh_token_jti(jti=jti)
 
 
-async def revoke_all_user_sessions(*, user_id: int) -> None:
+async def revoke_all_user_sessions(db: AsyncSession, *, user_id: int) -> None:
     await revoke_all_refresh_sessions_for_user(user_id=user_id)
+    user = await get_user_by_id(db, user_id)
+    if user:
+        user.access_revoked_before = datetime.now(timezone.utc)
+        await db.commit()
+
+
+def _token_issued_at(payload: dict) -> datetime | None:
+    raw_iat = payload.get("iat")
+    if isinstance(raw_iat, datetime):
+        return raw_iat if raw_iat.tzinfo else raw_iat.replace(tzinfo=timezone.utc)
+    if isinstance(raw_iat, (int, float)):
+        try:
+            return datetime.fromtimestamp(float(raw_iat), tz=timezone.utc)
+        except Exception:
+            return None
+    if isinstance(raw_iat, str):
+        try:
+            parsed = datetime.fromisoformat(raw_iat.replace("Z", "+00:00"))
+            return parsed if parsed.tzinfo else parsed.replace(tzinfo=timezone.utc)
+        except Exception:
+            return None
+    return None
 
 
 def get_request_metadata(request: Request) -> tuple[str | None, str | None]:
@@ -320,6 +342,15 @@ async def get_current_user(token: str = Depends(oauth2_scheme), db: AsyncSession
     user = await get_user_by_id(db, int(user_id))
     if not user:
         raise credentials_error
+    issued_at = _token_issued_at(payload)
+    if user.access_revoked_before is not None and issued_at is not None:
+        revoked_before = (
+            user.access_revoked_before
+            if user.access_revoked_before.tzinfo
+            else user.access_revoked_before.replace(tzinfo=timezone.utc)
+        )
+        if issued_at <= revoked_before:
+            raise credentials_error
     return user
 
 
@@ -339,6 +370,15 @@ async def get_current_user_for_ws(token: str, db: AsyncSession) -> User:
     user = await get_user_by_id(db, int(user_id))
     if not user:
         raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="User not found")
+    issued_at = _token_issued_at(payload)
+    if user.access_revoked_before is not None and issued_at is not None:
+        revoked_before = (
+            user.access_revoked_before
+            if user.access_revoked_before.tzinfo
+            else user.access_revoked_before.replace(tzinfo=timezone.utc)
+        )
+        if issued_at <= revoked_before:
+            raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Token was revoked")
     return user
 
 

app/users/models.py

@@ -37,6 +37,7 @@ class User(Base):
         nullable=False,
     )
     last_seen_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True, index=True)
+    access_revoked_before: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
 
     memberships: Mapped[list["ChatMember"]] = relationship(back_populates="user", cascade="all, delete-orphan")
     sent_messages: Mapped[list["Message"]] = relationship(back_populates="sender")

docs/api-reference.md

@@ -508,7 +508,8 @@ Response: `204`
 ### DELETE `/api/v1/auth/sessions`
 
 Auth required.  
-Response: `204`
+Response: `204`  
+Behavior: revokes all refresh sessions and invalidates all access tokens issued before this request.
 
 ### POST `/api/v1/auth/2fa/setup`
 

docs/realtime.md

@@ -236,5 +236,6 @@ Validation/runtime error during WS processing:
 - Send periodic `ping` and expect `pong`.
 - Reconnect with exponential backoff.
 - On `chat_updated`, refresh chat metadata via REST (`GET /api/v1/chats` or `GET /api/v1/chats/{chat_id}`).
+- On reconnect/visibility restore, reconcile state by reloading already-opened chats/messages via REST
+  to recover missed `message_deleted`/delivery updates after transient disconnects or backend restarts.
 - Use REST message history endpoints for pagination; WS is realtime transport, not history source.
-

web/src/hooks/useRealtime.ts

@@ -134,7 +134,7 @@ export function useRealtime() {
           const chatId = Number(event.payload.chat_id);
           if (Number.isFinite(chatId)) {
             scheduleReloadChats();
-            if (chatStore.activeChatId === chatId) {
+            if (chatStore.activeChatId === chatId || (chatStore.messagesByChat[chatId]?.length ?? 0) > 0) {
               void chatStore.loadMessages(chatId);
             }
           }
@@ -282,8 +282,15 @@ export function useRealtime() {
     const storeBefore = useChatStore.getState();
     await storeBefore.loadChats();
     const storeAfter = useChatStore.getState();
+    const loadedChatIds = Object.keys(storeAfter.messagesByChat)
+      .map((value) => Number(value))
+      .filter((value) => Number.isFinite(value) && (storeAfter.messagesByChat[value]?.length ?? 0) > 0);
+    const uniqueChatIds = new Set<number>(loadedChatIds);
     if (storeAfter.activeChatId) {
-      await storeAfter.loadMessages(storeAfter.activeChatId);
+      uniqueChatIds.add(storeAfter.activeChatId);
+    }
+    for (const chatId of uniqueChatIds) {
+      await storeAfter.loadMessages(chatId);
     }
   }