Derive main-quest season routes at projection time

server/internal/userdata/changed_tables.go

@@ -101,8 +101,9 @@ func ChangedTables(before, after *store.UserState) []string {
 		add("IUserMainQuestMainFlowStatus")
 		add("IUserMainQuestProgressStatus")
 		add("IUserMainQuestReplayFlowStatus")
-	}
-	if !mapsEqualStruct(before.MainQuestSeasonRoutes, after.MainQuestSeasonRoutes) {
+		// IUserMainQuestSeasonRoute is derived from MainQuest + Quests at projection
+		// time (see proj_quest.go / questflow.QuestHandler.SeasonRoutesFor) — flag it
+		// whenever either of those upstream inputs changes.
 		add("IUserMainQuestSeasonRoute")
 	}
 	if before.EventQuest != after.EventQuest {
@@ -202,6 +203,7 @@ func ChangedTables(before, after *store.UserState) []string {
 	}
 	if !mapsEqualStruct(before.Quests, after.Quests) {
 		add("IUserQuest")
+		add("IUserMainQuestSeasonRoute")
 	}
 	if !mapsEqualStruct(before.QuestMissions, after.QuestMissions) {
 		add("IUserQuestMission")

server/internal/userdata/proj_quest.go

@@ -116,38 +116,29 @@ func init() {
 		return s
 	})
 	register("IUserMainQuestSeasonRoute", func(user store.UserState) string {
-		if len(user.MainQuestSeasonRoutes) == 0 {
-			// Fallback to current (season, route) for legacy saves with no history.
-			s, _ := utils.EncodeJSONMaps(map[string]any{
-				"userId":            user.UserId,
-				"mainQuestSeasonId": user.MainQuest.MainQuestSeasonId,
-				"mainQuestRouteId":  user.MainQuest.CurrentMainQuestRouteId,
-				"latestVersion":     user.MainQuest.LatestVersion,
-			})
-			return s
+		if questHandler == nil {
+			return "[]"
 		}
-		keys := make([]store.SeasonRouteKey, 0, len(user.MainQuestSeasonRoutes))
-		for k := range user.MainQuestSeasonRoutes {
-			keys = append(keys, k)
+		pairs := questHandler.SeasonRoutesFor(&user)
+		if len(pairs) == 0 {
+			return "[]"
 		}
-		sort.Slice(keys, func(i, j int) bool {
-			if keys[i].MainQuestSeasonId != keys[j].MainQuestSeasonId {
-				return keys[i].MainQuestSeasonId < keys[j].MainQuestSeasonId
-			}
-			return keys[i].MainQuestRouteId < keys[j].MainQuestRouteId
-		})
-		records := make([]map[string]any, 0, len(keys))
-		for _, k := range keys {
-			e := user.MainQuestSeasonRoutes[k]
+		seasons := make([]int32, 0, len(pairs))
+		for s := range pairs {
+			seasons = append(seasons, s)
+		}
+		sort.Slice(seasons, func(i, j int) bool { return seasons[i] < seasons[j] })
+		records := make([]map[string]any, 0, len(seasons))
+		for _, s := range seasons {
 			records = append(records, map[string]any{
 				"userId":            user.UserId,
-				"mainQuestSeasonId": e.MainQuestSeasonId,
-				"mainQuestRouteId":  e.MainQuestRouteId,
-				"latestVersion":     e.LatestVersion,
+				"mainQuestSeasonId": s,
+				"mainQuestRouteId":  pairs[s],
+				"latestVersion":     user.MainQuest.LatestVersion,
 			})
 		}
-		s, _ := utils.EncodeJSONMaps(records...)
-		return s
+		out, _ := utils.EncodeJSONMaps(records...)
+		return out
 	})
 	register("IUserEventQuestProgressStatus", func(user store.UserState) string {
 		s, _ := utils.EncodeJSONMaps(map[string]any{

server/internal/userdata/projector.go

@@ -3,6 +3,7 @@ package userdata
 import (
 	"sort"
 
+	"lunar-tear/server/internal/questflow"
 	"lunar-tear/server/internal/store"
 )
 
@@ -10,6 +11,12 @@ type Projector func(user store.UserState) string
 
 var projectors = make(map[string]Projector)
 
+var questHandler *questflow.QuestHandler
+
+func SetQuestHandler(h *questflow.QuestHandler) {
+	questHandler = h
+}
+
 func register(tableName string, fn Projector) {
 	projectors[tableName] = fn
 }