It seems that next-sitemap is unable to produce sitemaps for dynamic paths, so we're switching back to dynamic server-side sitemap generation

src/pages/[group].tsx

@@ -5,7 +5,7 @@ import { getSchedule } from '@/app/agregator/schedule'
 import { NextSerialized, nextDeserializer, nextSerialized } from '@/app/utils/date-serializer'
 import { NavBar } from '@/widgets/navbar'
 import { LastUpdateAt } from '@/entities/last-update-at'
-import { groups } from '@/shared/data/groups'
+import groups from '@/shared/data/groups.json'
 import crypto from 'crypto'
 import React from 'react'
 import { getDayOfWeek } from '@/shared/utils'
@@ -61,6 +61,7 @@ export async function getServerSideProps(context: GetServerSidePropsContext<{ gr
   if (group && Object.hasOwn(groups, group) && group in groups) {
     let schedule
     let parsedAt
+    const groupName = group as keyof typeof groups
 
     const cachedSchedule = cachedSchedules.get(group)
     if (cachedSchedule?.lastFetched && Date.now() - cachedSchedule.lastFetched.getTime() < maxCacheDurationInMS) {
@@ -68,9 +69,10 @@ export async function getServerSideProps(context: GetServerSidePropsContext<{ gr
       parsedAt = cachedSchedule.lastFetched
     } else {
       try {
-        schedule = await getSchedule(...groups[group])
+        const group = groups[groupName] as [number, string]
+        schedule = await getSchedule(...group)
         parsedAt = new Date()
-        cachedSchedules.set(group, { lastFetched: new Date(), results: schedule })
+        cachedSchedules.set(groupName, { lastFetched: new Date(), results: schedule })
       } catch(e) {
         if (cachedSchedule?.lastFetched) {
           schedule = cachedSchedule.results
@@ -103,7 +105,7 @@ export async function getServerSideProps(context: GetServerSidePropsContext<{ gr
       props: nextSerialized({
         schedule: schedule,
         parsedAt: parsedAt,
-        group: groups[group][1]
+        group: groups[groupName][1]
       })
     }
   } else {

src/shared/data/groups.json

@@ -0,0 +1,4 @@
+{
+  "ps7": [146, "ПС-7"],
+  "pks35k": [78, "ПКС-35к"]
+}

src/shared/data/groups.ts

@@ -1,4 +0,0 @@
-export const groups: { [group: string]: [number, string] } = {
-  ps7: [146, 'ПС-7'],
-  pks35k: [78, 'ПКС-35к']
-}