fix: merge stops only considering current lines

src/lib/index.ts

@@ -1,3 +1,5 @@
+import type { GeoJSON } from "leaflet";
+
 export interface GameOptions {
 	mode: "easy" | "hard" | "extreme demon ultra miguel";
 	metro: boolean;
@@ -80,12 +82,36 @@ export async function getTram(fetch: FetchType): Promise<[GeoJSON.Feature, strin
 	return lazyTram;
 }
 
-export async function getStops(fetch: FetchType): Promise<GeoJSON.Feature[]> {
+async function getStops(fetch: FetchType): Promise<GeoJSON.Feature[]> {
 	if (!lazyStops) {
 		const stops: GeoJSON.FeatureCollection = await fetch(stopsUrl).then((r) => r.json());
+		lazyStops = stops.features;
+	}
 
-		lazyStops = Array.from(new Set(stops.features.map((f) => f.properties?.nom))).map((nom) => {
-			const matching = stops.features.filter((f) => f.properties?.nom === nom);
+	return lazyStops;
+}
+
+export async function getMergedStops(
+	fetch: FetchType,
+	lineCodes: Set<string>,
+): Promise<GeoJSON.Feature[]> {
+	const stops = await getStops(fetch);
+
+	const crossingStops = stops.filter((f) => {
+		if (f.properties?.desserte) {
+			return f.properties.desserte
+				.split(",")
+				.map((d: string) => d.split(":")[0])
+				.some((d: string) => lineCodes.has(d));
+		} else {
+			return false;
+		}
+	});
+
+	// merge coordinates of the stops
+	const mergedStops = Array.from(new Set(crossingStops.map((f) => f.properties?.nom))).map(
+		(nom) => {
+			const matching = crossingStops.filter((f) => f.properties?.nom === nom);
 
 			const longs = matching.map((f) => (f.geometry as GeoJSON.Point).coordinates[0]);
 			const lonAvg = longs.reduce((a, b) => a + b) / longs.length;
@@ -100,8 +126,8 @@ export async function getStops(fetch: FetchType): Promise<GeoJSON.Feature[]> {
 			if (feature.properties) feature.properties.desserte = desserte;
 
 			return feature;
-		});
-	}
+		},
+	);
 
-	return lazyStops;
+	return mergedStops;
 }

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

@@ -1,13 +1,18 @@
 import type { PageServerLoad } from "./$types";
-import { createGame, getMetro, getStops, getTram, type GameData, type GameOptions } from "$lib";
 import { error } from "@sveltejs/kit";
+import {
+	createGame,
+	getMergedStops,
+	getMetro,
+	getTram,
+	type GameData,
+	type GameOptions,
+} from "$lib";
 
 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");
 	if (mode !== "easy" && mode !== "hard" && mode !== "extreme demon ultra miguel") {
 		return error(400, "gamemode is invalid");
@@ -25,17 +30,7 @@ export const load: PageServerLoad = async ({ fetch, url, platform }) => {
 	if (options.tram) lineColors.push(...(await getTram(fetch)));
 
 	const lineCodes = new Set<string>(lineColors.map(([f, _]) => f.properties!.code_ligne));
-
-	const crossingStops = stops.filter((f) => {
-		if (f.properties?.desserte) {
-			return f.properties.desserte
-				.split(",")
-				.map((d: string) => d.split(":")[0])
-				.some((d: string) => lineCodes.has(d));
-		} else {
-			return false;
-		}
-	});
+	const crossingStops = await getMergedStops(fetch, lineCodes);
 
 	const strippedStops = crossingStops.map((f) => {
 		return { ...f, properties: {} };