feat: add Album model, artist/search/upload controllers, requireArtist middleware

src/controllers/artistController.js

@@ -0,0 +1,62 @@
+import Track from '../models/Track.js';
+
+export const artistController = {
+  async getProfile(req, res, next) {
+    try {
+      const artistName = req.params.artistName;
+
+      if (!artistName) {
+        return res.status(400).json({ success: false, message: 'Artist name is required' });
+      }
+
+      const decodedName = decodeURIComponent(artistName);
+
+      const tracks = await Track.find({ artist: decodedName })
+        .select('-__v')
+        .sort({ createdAt: -1 })
+        .lean();
+
+      if (!tracks.length) {
+        return res.status(404).json({ success: false, message: 'Artist not found' });
+      }
+
+      const totalTracks = tracks.length;
+      const genres = [...new Set(tracks.map(t => t.genre).filter(Boolean))];
+      const albums = [...new Set(tracks.map(t => t.album).filter(Boolean))];
+
+      const data = {
+        name: decodedName,
+        trackCount: totalTracks,
+        genres,
+        albums,
+        imageUrl: tracks.find(t => t.coverUrl)?.coverUrl || null,
+        topTracks: tracks.slice(0, 10),
+      };
+
+      return res.json({ success: true, data });
+    } catch (error) {
+      return next(error);
+    }
+  },
+
+  async getTracks(req, res, next) {
+    try {
+      const artistName = req.params.artistName;
+
+      if (!artistName) {
+        return res.status(400).json({ success: false, message: 'Artist name is required' });
+      }
+
+      const decodedName = decodeURIComponent(artistName);
+
+      const tracks = await Track.find({ artist: decodedName })
+        .select('-__v')
+        .sort({ createdAt: -1 })
+        .lean();
+
+      return res.json({ success: true, data: tracks });
+    } catch (error) {
+      return next(error);
+    }
+  },
+};