allow overlap (note) tags

drb-c2-core/app/models.py

@@ -147,6 +147,7 @@ class TripCreate(BaseModel):
     start_date: str  # YYYY-MM-DD
     end_date: str    # YYYY-MM-DD
     available_tags: List[str] = []      # tag labels configured for this trip
+    overlap_tags: List[str] = []        # subset of available_tags that allow time overlap
 
 
 class TripEventCreate(BaseModel):

drb-c2-core/app/routers/trips.py

@@ -208,6 +208,7 @@ async def create_trip(body: TripCreate):
         "end_date": body.end_date,
         "attendees": {},  # {discord_user_id: discord_username}
         "available_tags": body.available_tags,
+        "overlap_tags": body.overlap_tags,
         "created_at": now,
     }
     await fstore.doc_set("trips", trip_id, doc, merge=False)
@@ -226,13 +227,14 @@ async def get_trip(trip_id: str):
 
 @router.put("/{trip_id}/tags")
 async def update_trip_tags(trip_id: str, body: dict):
-    """Replace the trip's available tag list."""
+    """Replace the trip's available tag list and overlap-allowed tag list."""
     trip = await fstore.doc_get("trips", trip_id)
     if not trip:
         raise HTTPException(404, f"Trip '{trip_id}' not found.")
     tags = [str(t) for t in body.get("available_tags", []) if t]
-    await fstore.doc_update("trips", trip_id, {"available_tags": tags})
-    return {"available_tags": tags}
+    overlap = [str(t) for t in body.get("overlap_tags", []) if t and t in tags]
+    await fstore.doc_update("trips", trip_id, {"available_tags": tags, "overlap_tags": overlap})
+    return {"available_tags": tags, "overlap_tags": overlap}
 
 
 @router.delete("/{trip_id}")