From 0b0b25222b3131ada79ff78c28eb8bf07d977deb Mon Sep 17 00:00:00 2001
From: historia <[not public]>
Date: Tue, 15 Sep 2026 15:35:52 -0400
Subject: feat: single-owner game state, transactional lifecycle, durable money
 on server stop

---
 internal/world/mob.go | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

(limited to 'internal/world/mob.go')

diff --git a/internal/world/mob.go b/internal/world/mob.go
index f33b2f9..a794bdd 100644
--- a/internal/world/mob.go
+++ b/internal/world/mob.go
@@ -722,3 +722,27 @@ func (s *MobStore) SeedMobs(roomID int, entries []RoomMob) {
 		s.instances[instID] = inst
 	}
 }
+
+// RekeyRooms remaps every live mob instance's RoomID and HomeRoomID per
+// idMap (oldID -> newID), including wander rooms. Uses delete-all-then-
+// set-all so a swap cannot clobber an entry mid-rekey.
+func (s *MobStore) RekeyRooms(idMap map[int]int) {
+	if len(idMap) == 0 {
+		return
+	}
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	for _, inst := range s.instances {
+		if newID, ok := idMap[inst.RoomID]; ok && newID != inst.RoomID {
+			inst.RoomID = newID
+		}
+		if newID, ok := idMap[inst.HomeRoomID]; ok && newID != inst.HomeRoomID {
+			inst.HomeRoomID = newID
+		}
+		for i, room := range inst.WanderRooms {
+			if newID, ok := idMap[room]; ok && newID != room {
+				inst.WanderRooms[i] = newID
+			}
+		}
+	}
+}
-- 
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