1 files changed, 42 insertions, 0 deletions
diff --git a/internal/world/room_migrate.go b/internal/world/room_migrate.go
index b7840bc..42cd1ae 100644
--- a/internal/world/room_migrate.go
+++ b/internal/world/room_migrate.go
@@ -101,6 +101,48 @@ func (r *Room) RewriteRoomIDs(idMap map[int]int) bool {
 	return changed
 }
 
+// RemoveRoomRefs drops references to a deleted room from this room's
+// per-instance mob and object wander lists. Exit targets are removed by the
+// deletion caller. Teleport steps and conditions that name the deleted room
+// are left in place and neutralized at runtime (teleportPlayer refuses a
+// missing destination, and a Condition.Room that no longer exists simply
+// never matches), so this only removes the references the validator would
+// otherwise report as dangling. Returns whether anything changed.
+func (r *Room) RemoveRoomRefs(removedID int) bool {
+	if r == nil || removedID <= 0 {
+		return false
+	}
+	changed := false
+	for i := range r.Mobs {
+		if removeRoomRef(&r.Mobs[i].WanderRooms, removedID) {
+			changed = true
+		}
+	}
+	for i := range r.Objects {
+		if removeRoomRef(&r.Objects[i].WanderRooms, removedID) {
+			changed = true
+		}
+	}
+	return changed
+}
+
+// removeRoomRef removes target from list in place and reports whether it was
+// present.
+func removeRoomRef(list *[]int, target int) bool {
+	src := *list
+	out := src[:0]
+	removed := false
+	for _, v := range src {
+		if v == target {
+			removed = true
+			continue
+		}
+		out = append(out, v)
+	}
+	*list = out
+	return removed
+}
+
 // remapTriggers remaps step fields across a []behavior.Trigger (each trigger's
 // Steps + per-step Condition + trigger-level Condition).
 func remapTriggers(idMap map[int]int, list []behavior.Trigger) bool {