feat(api/music): initial implementation

src/lib/server/clients/last-fm.ts

@@ -1,5 +1,15 @@
 import { LASTFM_API_KEY, LASTFM_USER } from "$env/static/private";
+
 import { LastFMUser } from "lastfm-ts-api";
+import NodeCache from "node-cache";
+
+/**
+ * API cache.
+ */
+const cache = new NodeCache({
+    // NOTE: TTL is 1 minute
+    stdTTL: 60,
+});
 
 /**
  * Last.fm API client.
@@ -36,11 +46,7 @@ export interface RecentTrack {
     url: string;
 }
 
-/**
+async function _getRecentTrack(): Promise<RecentTrack> {
- * Get the most recent track from a listening history.
- * @returns Recent track.
- */
-export async function getRecentTrack(): Promise<RecentTrack> {
     // NOTE: fetch the recent tracks
     const {
         recenttracks: {
@@ -62,3 +68,20 @@ export async function getRecentTrack(): Promise<RecentTrack> {
         url: track.url,
     };
 }
+
+/**
+ * Get the most recent track from a listening history.
+ * @returns Recent track.
+ */
+export async function getRecentTrack(): Promise<RecentTrack> {
+    let result = cache.get<RecentTrack>("recentTrack");
+
+    if (result !== undefined) {
+        return result;
+    }
+
+    result = await _getRecentTrack();
+    cache.set("recentTrack", result);
+
+    return result;
+}