Added saved artists page

server/api/user/artists.get.ts

@@ -0,0 +1,41 @@
+import { setResponseStatus } from "h3"
+import { Artist } from "#server/models/artist"
+import { Track } from "#server/models/track"
+import { User } from "#server/models/user"
+import { defineAuthenticatedEventHandler, requireAuthenticatedUser } from "#server/utils/auth"
+
+export default defineAuthenticatedEventHandler(async (event) => {
+	const authenticatedUser = await requireAuthenticatedUser(event)
+	const user = await User.findById(authenticatedUser._id).select("savedTracks")
+	if (!user) {
+		setResponseStatus(event, 404)
+		return { message: "User not found" }
+	}
+
+	if (!user.savedTracks.length) return []
+
+	const tracks = await Track.find({ _id: { $in: user.savedTracks } })
+		.select("_id artists")
+		.exec()
+	const artistsByTrack = new Map(
+		tracks.map((track: any) => [
+			track._id.toString(),
+			(track.artists ?? []).map((artist: any) => artist.toString()),
+		]),
+	)
+	const artistIds: string[] = []
+	const seen = new Set<string>()
+	for (const savedTrack of user.savedTracks) {
+		for (const artistId of artistsByTrack.get(savedTrack.toString()) ?? []) {
+			if (!seen.has(artistId)) {
+				seen.add(artistId)
+				artistIds.push(artistId)
+			}
+		}
+	}
+	if (!artistIds.length) return []
+
+	const artists = await Artist.find({ _id: { $in: artistIds } }).exec()
+	const artistsById = new Map(artists.map((artist: any) => [artist._id.toString(), artist]))
+	return artistIds.map((id) => artistsById.get(id)).filter((artist) => artist != null)
+})