Support getting all invited events /w pending ones

src/api/events.py

@@ -1,7 +1,8 @@
 from datetime import datetime
-from typing import Annotated, cast, final
+from typing import Annotated, Literal, cast, final
 
 from beanie import Link, PydanticObjectId
+from beanie.odm.operators.find.comparison import In
 from fastapi import APIRouter, Body, HTTPException, Query, status
 from fastapi.responses import Response
 from pydantic import BaseModel, StringConstraints, field_serializer, field_validator
@@ -232,16 +233,21 @@ async def get_user_invited_events(
     start_to: Annotated[datetime | None, Query()] = None,
     end_from: Annotated[datetime | None, Query()] = None,
     end_to: Annotated[datetime | None, Query()] = None,
+    invite_status: Annotated[Literal["pending", "accepted"] | None, Query()] = None,
 ) -> list[EventData]:
     """Get all events that given user was invited to.
 
-    These are the events that the user has already accepted the invite for.
-    Events pending acceptance are not included.
+    These are the events that the user has already accepted the invite for
+    and the events that the user has a pending invite for.
 
     Optionally, it's possible to use query params to filter the events
     based on the date-time of the event. The dates are specified in ISO 8601 format.
 
     E.g.: /users/{user_id}/events/invited?start_from=2024-12-29T13:48:53.228234Z
+
+    It's also possible to filter the events based on the invite status.
+
+    E.g.: /users/{user_id}/events/invited?invite_status=accepted
     """
     if user_id != user.id:
         raise HTTPException(
@@ -250,7 +256,17 @@ async def get_user_invited_events(
         )
 
     # Initial query (all events the user is attending)
-    query = Event.find(expr(Event.attendees).id == user_id)
+    query = Event.find()
+    if invite_status is None or invite_status == "accepted":
+        query = query.find(expr(Event.attendees).id == user_id)
+    if invite_status is None or invite_status == "pending":
+        invitations = await Invitation.find(
+            expr(Invitation.invitee).id == user_id,
+            expr(Invitation.status) == "pending",
+        ).to_list()
+        event_ids = get_id_list([invite.event for invite in invitations], allow_links=True)
+
+        query = Event.find(In(expr(Event.id), event_ids))
 
     # Filter by date-time
     if start_from is not None:

src/utils/db.py

@@ -41,12 +41,19 @@ class IdNotFoundError[T: Document](ValueError):
         super().__init__(f"Item with id {item_id} of type {typ.__name__} not found")
 
 
-def get_id_list[T: Document](items: Sequence[T | Link[T]]) -> list[PydanticObjectId]:
-    """Extracts the ids from a list of db items."""
+def get_id_list[T: Document](items: Sequence[T | Link[T]], *, allow_links: bool = False) -> list[PydanticObjectId]:
+    """Extracts the ids from a list of db items.
+
+    :param items: List of db items.
+    :param allow_links: If True, allows returning reference ids of unfetched Link objects.
+    """
     id_list: list[PydanticObjectId] = []
     for item in items:
         if isinstance(item, Link):
-            raise UnfetchedLinkError(item)
+            if not allow_links:
+                raise UnfetchedLinkError(item)
+            id_list.append(item.ref.id)
+            continue
 
         if item.id is None:
             raise MissingIdError(item)