Add map-specific tournament creation link

components/TournamentLobby.tsx

@@ -37,7 +37,13 @@ function time(value: string, zone: string) {
     timeZone: zone,
   }).format(new Date(value));
 }
-export function TournamentIndex({ signedIn }: { signedIn: boolean }) {
+export function TournamentIndex({
+  signedIn,
+  initialMapId = null,
+}: {
+  signedIn: boolean;
+  initialMapId?: string | null;
+}) {
   const { t } = useI18n();
   const router = useRouter();
   const [events, setEvents] = useState<Events | null>(null);
@@ -45,7 +51,8 @@ export function TournamentIndex({ signedIn }: { signedIn: boolean }) {
   const [presets, setPresets] = useState<DifficultyPreset[]>([]);
   const [error, setError] = useState("");
   const [busy, setBusy] = useState(false);
-  const [creating, setCreating] = useState(false);
+  const [creating, setCreating] = useState(!!(signedIn && initialMapId));
+  const [selectedMap, setSelectedMap] = useState(initialMapId ?? "");
   const [clock, setClock] = useState(0);
   const [timerMode, setTimerMode] = useState<"shared" | "perMini">("shared");
   const [roundSeconds, setRoundSeconds] = useState(450);
@@ -83,6 +90,9 @@ export function TournamentIndex({ signedIn }: { signedIn: boolean }) {
         if (active) {
           setMaps(catalog.maps);
           setPresets(difficulties.presets);
+          setSelectedMap((current) =>
+            catalog.maps.some((map) => map.id === current) ? current : "",
+          );
         }
       })
       .catch((e) => {
@@ -183,7 +193,12 @@ export function TournamentIndex({ signedIn }: { signedIn: boolean }) {
           </label>
           <label>
             {t("Map")}
-            <select name="dataset" required defaultValue="">
+            <select
+              name="dataset"
+              required
+              value={selectedMap}
+              onChange={(event) => setSelectedMap(event.target.value)}
+            >
               <option value="" disabled>
                 {t("Choose a map")}
               </option>