feat: optimize and use new object

src/lib/mersenne.ts

@@ -79,7 +79,7 @@
    email: m-mat @ math.sci.hiroshima-u.ac.jp (remove space)
 */
 
-class SIMDMersenneTwister {
+export class SIMDMersenneTwister {
   /* SFMT period parameters for SFMT19937 */
   private readonly MEXP = 19937;
   private readonly N = Math.floor(this.MEXP / 128) + 1; // 156

src/lib/stations/index.ts

@@ -1,17 +1,28 @@
+import type { Song } from '@/types';
 import { getChillhopStation } from './chillhop';
 import { getSleepStationSongs } from './sleep';
 
-const customStations = {
+const customStations: Record<number, () => Promise<Song[]>> = {
   50000: getSleepStationSongs,
 };
-const chillhopStations = Object.fromEntries(
-  Array.from({ length: 100 }, (_, i) => {
-    const stationId = 10000 + i;
-    return [stationId, getChillhopStation.bind(null, stationId)];
-  })
-);
 
-export const stations = {
-  ...customStations,
-  ...chillhopStations,
-};
+export const stations: Record<number, () => Promise<Song[]>> = new Proxy(customStations, {
+  get(target, prop) {
+    const stationId = Number(prop);
+    
+    if (target[stationId]) {
+      return target[stationId];
+    }
+    
+    if (stationId >= 10000 && stationId < 20000) {
+      return () => getChillhopStation(stationId);
+    }
+    
+    return undefined;
+  },
+  
+  has(target, prop) {
+    const stationId = Number(prop);
+    return target[stationId] !== undefined || (stationId >= 10000 && stationId < 20000);
+  }
+});

src/lib/stations/sleep.ts

@@ -1,4 +1,5 @@
 import type { Song } from "@/types";
+import { SIMDMersenneTwister } from "@/mersenne";
 
 export async function getSleepStationSongs(): Promise<Song[]> {
   const m = new SIMDMersenneTwister();

src/routes/api/live/[stationId]/+server.ts

@@ -1,4 +1,4 @@
-import type { Song } from '@/types.js';
+import { stations } from '@/stations/index.js';
 
 export async function GET(event) {
   const { stationId } = event.params;
@@ -7,36 +7,15 @@ export async function GET(event) {
     return new Response('Invalid station ID', { status: 400 });
   }
 
-  if (stationId.startsWith('50')) {
-    // custom stations
-    if (stationIdInt === 50000) {
-      const data = await fetch('https://lofi-cdn.srizan.dev/sleep/list.json').then(async (res) => await res.json() as string[]);
-      const randomData = data.sort(() => 0.5 - Math.random()).slice(0, 5).map(song => {
-        const noOpus = song.replace('.opus', '');
-        const [artist, title] = noOpus.split(' - ');
-        return {
-          id: parseInt((Math.random() * 1000000).toFixed(0)),
-          fileId: noOpus,
-          endpoint: `https://lofi-cdn.srizan.dev/sleep/${song}`,
-          artists: artist,
-          title: title,
-          image: `https://lofi-cdn.srizan.dev/sleep/thumbs/${noOpus}.webp`,
-        } as Song;
-      });
-      return new Response(JSON.stringify(randomData), {
+   const stationFunction = stations[stationIdInt];
+  if (!stationFunction) {
+    return new Response('Station not found', { status: 404 });
+  }
+
+  const songs = await stationFunction();
+  return new Response(JSON.stringify(songs), {
     headers: {
       'Content-Type': 'application/json'
     }
   });
 }
-  } else {
-    // chillhop stations
-    const res = await fetch(`https://stream.chillhop.com/live/${stationId}`);
-    const data = await res.json();
-    return new Response(JSON.stringify(data), {
-      headers: {
-        'Content-Type': 'application/json'
-      }
-    });
-  }
-}