Convert back to server app from lambda function

getPlaylistIdFromUrl.ts

@@ -0,0 +1,19 @@
+export const getPlaylistIdFromUrl = (url: string) => {
+  try {
+    const urlObject = new URL(url);
+    const [collectionName, playlistId] = urlObject.pathname
+      .split('/')
+      .filter(Boolean);
+
+    const isValidPlaylistUrl =
+      urlObject.hostname === 'open.spotify.com' &&
+      collectionName === 'playlist' &&
+      playlistId;
+
+    if (!isValidPlaylistUrl) return null;
+
+    return playlistId;
+  } catch {
+    return null;
+  }
+};