feat: bitpacked and base64 encoded VisitedRooms in player YAML to keep the file human readable

1 files changed, 4 insertions, 2 deletions

diff --git a/internal/game/exit_migrate.go b/internal/game/exit_migrate.go
index 845a6b2..2872f34 100644
--- a/internal/game/exit_migrate.go
+++ b/internal/game/exit_migrate.go
@@ -10,7 +10,7 @@ import (
 // rewritePlayerRoomIDs remaps room-ID-embedded state in a single player per
 // idMap (oldID -> newID): discovered-exit player flag keys
 // (hidden_exit_<id>_<dir>), current RoomID, EnterSeqRoom, MapSymbols keys, and
-// Stats.RoomsVisited keys. Returns whether any field was changed.
+// Stats.RoomsVisited bitset. Returns whether any field was changed.
 //
 // idMap is assumed to be a bijection (see Room.RewriteRoomIDs); the flag-key
 // and int-map rekeys use delete-all-then-set-all so a swap (A<->B) cannot
@@ -32,7 +32,9 @@ func rewritePlayerRoomIDs(p *player.Player, idMap map[int]int) bool {
 	if len(p.MapSymbols) > 0 && rekeyIntMap(p.MapSymbols, idMap) {
 		changed = true
 	}
-	if len(p.Stats.RoomsVisited) > 0 && rekeyIntMap(p.Stats.RoomsVisited, idMap) {
+	next, moved := p.Stats.RoomsVisited.Rekey(idMap)
+	if moved {
+		p.Stats.RoomsVisited = next
 		changed = true
 	}
 	return changed