feat: use cloudflare kv

src/app.d.ts

@@ -6,7 +6,11 @@ declare global {
 		// interface Locals {}
 		// interface PageData {}
 		// interface PageState {}
-		// interface Platform {}
+		interface Platform {
+			env?: {
+				TCL_GUESSR_KV: KVNamespace;
+			};
+		}
 	}
 }
 

src/lib/index.ts

@@ -35,17 +35,22 @@ let lazyMetro: [GeoJSON.Feature, string][] | null = null;
 let lazyTram: [GeoJSON.Feature, string][] | null = null;
 let lazyStops: GeoJSON.Feature[] | null = null;
 
-const games: Record<string, GeoJSON.Feature> = {};
-
-export function createGame(stop: GeoJSON.Feature): string {
+export async function createGame(stop: GeoJSON.Feature, kv: KVNamespace<string>): Promise<string> {
 	const uuid = crypto.randomUUID();
-	games[uuid] = stop;
+
+	await kv.put(`game:${uuid}`, JSON.stringify(stop), { expirationTtl: 600 });
+
 	return uuid;
 }
 
-export function stopGame(uuid: string): GeoJSON.Feature | null {
-	const stop = games[uuid];
-	delete games[uuid];
+export async function stopGame(
+	uuid: string,
+	kv: KVNamespace<string>,
+): Promise<GeoJSON.Feature | null> {
+	const stop: GeoJSON.Feature | null = await kv.get(`game:${uuid}`, "json");
+
+	if (stop) await kv.delete(`game:${uuid}`);
+
 	return stop;
 }
 

src/routes/api/check/+server.ts

@@ -1,9 +1,13 @@
 import { stopGame, type CheckData, type CheckResponse } from "$lib";
+import { error } from "@sveltejs/kit";
 import type { RequestHandler } from "./$types";
 
-export const POST: RequestHandler = async ({ request }) => {
+export const POST: RequestHandler = async ({ request, platform }) => {
+	const kv = platform?.env?.TCL_GUESSR_KV;
+	if (!kv) return error(500, "could not connect to kv");
+
 	const data: CheckData = await request.json();
-	const stop = stopGame(data.gameId);
+	const stop = await stopGame(data.gameId, kv);
 
 	if (stop) {
 		// GeoJSON data is LonLat, not LatLon

src/routes/game/+page.server.ts

@@ -2,7 +2,10 @@ import type { PageServerLoad } from "./$types";
 import { createGame, getMetro, getStops, getTram, type GameData, type GameOptions } from "$lib";
 import { error } from "@sveltejs/kit";
 
-export const load: PageServerLoad = async ({ fetch, url }) => {
+export const load: PageServerLoad = async ({ fetch, url, platform }) => {
+	const kv = platform?.env?.TCL_GUESSR_KV;
+	if (!kv) return error(500, "could not connect to kv");
+
 	const stops = await getStops(fetch);
 
 	const mode = url.searchParams.get("mode");
@@ -40,7 +43,7 @@ export const load: PageServerLoad = async ({ fetch, url }) => {
 		return error(400, "could not select random stop");
 	}
 
-	const gameId = createGame(randomStop);
+	const gameId = await createGame(randomStop, kv);
 	const gameData: GameData = {
 		lines: options.mode === "easy" || options.mode === "hard" ? lineColors : [],
 		stops: options.mode === "easy" ? crossingStops : [],