From d00e51f3a27f834d65551a67ddc876203a89d34e Mon Sep 17 00:00:00 2001
From: karilint <kari.lintulaakso@gmail.com>
Date: Thu, 21 May 2026 14:52:24 +0300
Subject: [PATCH] Fallback cross-search table requests to legacy GET

---
 frontend/src/redux/crossSearchReducer.ts | 51 +++++++++++++++++++-----
 1 file changed, 41 insertions(+), 10 deletions(-)

diff --git a/frontend/src/redux/crossSearchReducer.ts b/frontend/src/redux/crossSearchReducer.ts
index 21cfba55..df330307 100755
--- a/frontend/src/redux/crossSearchReducer.ts
+++ b/frontend/src/redux/crossSearchReducer.ts
@@ -1,29 +1,60 @@
 import { MRT_ColumnFiltersState, MRT_SortingState } from 'material-react-table'
+import type { FetchBaseQueryError } from '@reduxjs/toolkit/query'
 import { api } from './api'
 import { CrossSearch, SimplifiedLocality } from '@/shared/types'
 
+const encodeRouteParameter = (value: unknown) => encodeURIComponent(JSON.stringify(value))
+
+const isMissingPostRouteError = (error: FetchBaseQueryError | undefined, route: string) => {
+  if (!error) return false
+  const data = 'data' in error ? error.data : undefined
+  const dataText = typeof data === 'string' ? data : ''
+  const originalStatus = 'originalStatus' in error ? error.originalStatus : undefined
+  return (error.status === 404 || originalStatus === 404) && dataText.includes(`Cannot POST ${route}`)
+}
+
 const crossSearchApi = api.injectEndpoints({
   endpoints: builder => ({
     getAllCrossSearch: builder.query<
       CrossSearch[],
       { limit: number; offset: number; columnFilters: MRT_ColumnFiltersState; sorting: MRT_SortingState }
     >({
-      query: ({ limit, offset, columnFilters, sorting }) => ({
-        url: `/crosssearch/all`,
-        method: 'POST',
-        body: { limit, offset, columnFilters, sorting },
-      }),
+      queryFn: async ({ limit, offset, columnFilters, sorting }, _queryApi, _extraOptions, baseQuery) => {
+        const postResult = await baseQuery({
+          url: `/crosssearch/all`,
+          method: 'POST',
+          body: { limit, offset, columnFilters, sorting },
+        })
+
+        if (!isMissingPostRouteError(postResult.error, '/crosssearch/all')) {
+          return postResult as { data: CrossSearch[] } | { error: FetchBaseQueryError }
+        }
+
+        return (await baseQuery({
+          url: `/crosssearch/all/${limit}/${offset}/${encodeRouteParameter(columnFilters)}/${encodeRouteParameter(sorting)}`,
+        })) as { data: CrossSearch[] } | { error: FetchBaseQueryError }
+      },
       providesTags: result => (result ? [{ type: 'localities' }] : []),
     }),
     getAllCrossSearchLocalities: builder.query<
       SimplifiedLocality[],
       { columnFilters: MRT_ColumnFiltersState; sorting: MRT_SortingState }
     >({
-      query: ({ columnFilters, sorting }) => ({
-        url: `/crosssearch/localities`,
-        method: 'POST',
-        body: { columnFilters, sorting },
-      }),
+      queryFn: async ({ columnFilters, sorting }, _queryApi, _extraOptions, baseQuery) => {
+        const postResult = await baseQuery({
+          url: `/crosssearch/localities`,
+          method: 'POST',
+          body: { columnFilters, sorting },
+        })
+
+        if (!isMissingPostRouteError(postResult.error, '/crosssearch/localities')) {
+          return postResult as { data: SimplifiedLocality[] } | { error: FetchBaseQueryError }
+        }
+
+        return (await baseQuery({
+          url: `/crosssearch/localities/${encodeRouteParameter(columnFilters)}/${encodeRouteParameter(sorting)}`,
+        })) as { data: SimplifiedLocality[] } | { error: FetchBaseQueryError }
+      },
       providesTags: result => (result ? [{ type: 'localities' }] : []),
     }),
   }),