From 51c00f2a75110b446f2d13d4678b8074936fa703 Mon Sep 17 00:00:00 2001
From: messypy <you@example.com>
Date: Tue, 28 Jul 2026 00:37:56 +0900
Subject: [PATCH] Fallback history export to VRChat logs

---
 cmd/vrc_osc_gui/history_view_windows.go | 67 +++++++++++++++++++++++--
 cmd/vrc_osc_gui/window_windows.go       |  2 +-
 2 files changed, 63 insertions(+), 6 deletions(-)

diff --git a/cmd/vrc_osc_gui/history_view_windows.go b/cmd/vrc_osc_gui/history_view_windows.go
index 2869f60..5b9e008 100644
--- a/cmd/vrc_osc_gui/history_view_windows.go
+++ b/cmd/vrc_osc_gui/history_view_windows.go
@@ -342,6 +342,45 @@ func historyEventsFromSnapshot() []historyEventRecord {
 	return out
 }
 
+func historyEventsWithFallback() []historyEventRecord {
+	events := historyEventsFromSnapshot()
+	if len(events) > 0 {
+		return events
+	}
+	users, ok := currentUsersFromVRChatLog()
+	if !ok || len(users) == 0 {
+		return nil
+	}
+	out := make([]historyEventRecord, 0, len(users))
+	for _, user := range users {
+		name := strings.TrimSpace(user.Name)
+		if name == "" {
+			continue
+		}
+		if !user.LastJoin.IsZero() {
+			out = append(out, historyEventRecord{
+				At:   user.LastJoin,
+				Kind: "join",
+				Name: name,
+			})
+		}
+		if !user.Present && !user.LastLeave.IsZero() {
+			out = append(out, historyEventRecord{
+				At:   user.LastLeave,
+				Kind: "leave",
+				Name: name,
+			})
+		}
+	}
+	sort.SliceStable(out, func(i, j int) bool {
+		if out[i].At.Equal(out[j].At) {
+			return strings.ToLower(out[i].Name) < strings.ToLower(out[j].Name)
+		}
+		return out[i].At.Before(out[j].At)
+	})
+	return out
+}
+
 func decodeHistoryEventsSnapshot(b []byte) []historyEventRecord {
 	type snapshot struct {
 		UpdatedAt time.Time `json:"updated_at"`
@@ -408,7 +447,7 @@ func historyVisitsForDay(app *guiApp, day time.Time) []historyDetailRow {
 	if !historyInQueryRange(day, q) {
 		return nil
 	}
-	events := historyEventsFromSnapshot()
+	events := historyEventsWithFallback()
 	visits := historyVisitSource()
 	return historyVisitsForDayFromData(app, day, visits, events, q)
 }
@@ -502,7 +541,7 @@ func historyCalendarCellsForMonth(app *guiApp) []historyCalendarCell {
 		monthStart = time.Now()
 	}
 	monthStart = time.Date(monthStart.Year(), monthStart.Month(), 1, 0, 0, 0, 0, monthStart.Location())
-	events := historyEventsFromSnapshot()
+	events := historyEventsWithFallback()
 	visits := historyVisitSource()
 	return historyCalendarCellsForMonthFromData(app, monthStart, visits, events, q)
 }
@@ -591,7 +630,7 @@ func exportHistoryDay(app *guiApp, day time.Time, selected map[string]bool) (str
 }
 
 func exportHistoryDayFromRequest(req historyExportRequest) (string, error) {
-	events := historyEventsFromSnapshot()
+	events := historyEventsWithFallback()
 	visits := historyVisitSource()
 	rows := append([]historyDetailRow(nil), req.Rows...)
 	if len(rows) == 0 {
@@ -795,7 +834,7 @@ func appendExportGuestSnapshot(b *strings.Builder, day time.Time, q historyQuery
 	if b == nil {
 		return
 	}
-	guests := readGuestSnapshot()
+	guests := guestSnapshotForExport()
 	dayStart, dayEnd := historyDayBounds(day)
 	type guestLine struct {
 		name    string
@@ -848,6 +887,24 @@ func appendExportGuestSnapshot(b *strings.Builder, day time.Time, q historyQuery
 	}
 }
 
+func guestSnapshotForExport() []userState {
+	guests := readGuestSnapshot()
+	if len(guests) > 0 {
+		out := make([]userState, 0, len(guests))
+		for _, guest := range guests {
+			out = append(out, userState{
+				Name:      guest.Name,
+				Present:   guest.Present,
+				LastJoin:  guest.LastJoin,
+				LastLeave: guest.LastLeave,
+			})
+		}
+		return out
+	}
+	users, _ := currentUsersFromJoinLeave()
+	return users
+}
+
 func cloneHistorySelection(selected map[string]bool) map[string]bool {
 	if len(selected) == 0 {
 		return nil
@@ -887,7 +944,7 @@ func refreshHistoryCache(app *guiApp, force bool) bool {
 	if !force && app.historyCacheLoaded && !app.historyReloadPending {
 		return false
 	}
-	events := historyEventsFromSnapshot()
+	events := historyEventsWithFallback()
 	visits := historyVisitSource()
 	q := historyQueryFromApp(app)
 	app.historyRows = historyRows()
diff --git a/cmd/vrc_osc_gui/window_windows.go b/cmd/vrc_osc_gui/window_windows.go
index e706728..d257555 100644
--- a/cmd/vrc_osc_gui/window_windows.go
+++ b/cmd/vrc_osc_gui/window_windows.go
@@ -2946,7 +2946,7 @@ func eventRows(users []userState) []guiEventRow {
 }
 
 func joinLeaveRowsForCurrentWorld(app *guiApp) []guiEventRow {
-	events := historyEventsFromSnapshot()
+	events := historyEventsWithFallback()
 	if len(events) == 0 {
 		users, _ := currentUsersFromJoinLeave()
 		return eventRows(users)