feat(playlists): add likes and playlists

src/controllers/playlistController.js

@@ -0,0 +1,67 @@
+import Playlist from '../models/Playlist.js';
+import Track from '../models/Track.js';
+
+export const playlistController = {
+  async list(req, res, next) {
+    try {
+      const playlists = await Playlist.find({ user: req.userId })
+        .sort({ createdAt: -1 })
+        .lean();
+      res.json({ success: true, data: playlists });
+    } catch (error) {
+      next(error);
+    }
+  },
+
+  async create(req, res, next) {
+    try {
+      const { name } = req.body;
+      if (!name) {
+        return res
+          .status(400)
+          .json({ success: false, message: 'Playlist name is required' });
+      }
+
+      const playlist = await Playlist.create({
+        name,
+        user: req.userId,
+      });
+
+      return res.json({ success: true, data: playlist });
+    } catch (error) {
+      next(error);
+    }
+  },
+
+  async addTrack(req, res, next) {
+    try {
+      const { playlistId } = req.params;
+      const { trackId } = req.body;
+
+      if (!trackId) {
+        return res
+          .status(400)
+          .json({ success: false, message: 'Track id is required' });
+      }
+
+      const exists = await Track.exists({ _id: trackId });
+      if (!exists) {
+        return res.status(404).json({ success: false, message: 'Track not found' });
+      }
+
+      const playlist = await Playlist.findOneAndUpdate(
+        { _id: playlistId, user: req.userId },
+        { $addToSet: { tracks: trackId } },
+        { new: true }
+      ).lean();
+
+      if (!playlist) {
+        return res.status(404).json({ success: false, message: 'Playlist not found' });
+      }
+
+      return res.json({ success: true, data: playlist });
+    } catch (error) {
+      next(error);
+    }
+  },
+};