From 37ebda8455c3f9409fefa507cfe9a9e83469a59b Mon Sep 17 00:00:00 2001
From: gnezim <gnezim@gmail.com>
Date: Mon, 20 Apr 2026 11:53:36 +0300
Subject: [PATCH] Allow departure-only / arrival-only online-board search
 submits

Previously handleRouteSubmit required both fields and returned silently
when only one was filled. Angular's
OnlineBoardUrlBuilderService.getRoutePageUrl switches on which side is
populated, routing to /onlineboard/departure/{dep}-{date} or
/onlineboard/arrival/{arr}-{date} for one-sided searches. React now
mirrors the same branch and only no-ops when neither side is filled
(matching Angular's `if (!departure && !arrival) return;` in
OnlineBoardFilterService.toRoutePage).
---
 .../components/OnlineBoardFilter.tsx           | 18 ++++++++++++++++--
 1 file changed, 16 insertions(+), 2 deletions(-)

diff --git a/src/features/online-board/components/OnlineBoardFilter.tsx b/src/features/online-board/components/OnlineBoardFilter.tsx
index 7ce35020..b1152c88 100644
--- a/src/features/online-board/components/OnlineBoardFilter.tsx
+++ b/src/features/online-board/components/OnlineBoardFilter.tsx
@@ -197,11 +197,25 @@ export const OnlineBoardFilter: FC<OnlineBoardFilterProps> = ({
     (e: FormEvent) => {
       e.preventDefault();
 
+      // Mirrors Angular's OnlineBoardFilterService.toRoutePage + the
+      // UrlBuilder.getRoutePageUrl switch: one-sided searches (only
+      // departure or only arrival) route to /departure/ or /arrival/
+      // respectively; both sides route to /route/. No-op only when
+      // neither side is filled (Angular's
+      // `if (!departure && !arrival) return;`).
       const dateParam = dateToYyyymmdd(routeDate ?? new Date());
       const depCode = routeDepartureCode.trim().toUpperCase();
       const arrCode = routeArrivalCode.trim().toUpperCase();
-      if (!depCode || !arrCode) return;
-      const url = buildOnlineBoardUrl({ type: "route", departure: depCode, arrival: arrCode, date: dateParam });
+      if (!depCode && !arrCode) return;
+
+      let url: string;
+      if (depCode && !arrCode) {
+        url = buildOnlineBoardUrl({ type: "departure", station: depCode, date: dateParam });
+      } else if (!depCode && arrCode) {
+        url = buildOnlineBoardUrl({ type: "arrival", station: arrCode, date: dateParam });
+      } else {
+        url = buildOnlineBoardUrl({ type: "route", departure: depCode, arrival: arrCode, date: dateParam });
+      }
       void navigate(`/${locale}/${url}`);
     },
     [routeDepartureCode, routeArrivalCode, routeDate, navigate, locale],