Initial backend code

src/routes/user.js

@@ -0,0 +1,71 @@
+const express = require('express');
+const router = express.Router();
+const { auth } = require('../middleware/auth');
+const User = require('../models/User');
+
+router.get('/profile', auth, async (req, res, next) => {
+  try {
+    const user = await User.findById(req.user._id).select('-__v');
+
+    res.json({
+      success: true,
+      data: user
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+router.put('/profile', auth, async (req, res, next) => {
+  try {
+    const allowedUpdates = ['nickname', 'avatarUrl', 'phoneNumber', 'profile'];
+    const updates = {};
+
+    Object.keys(req.body).forEach(key => {
+      if (allowedUpdates.includes(key)) {
+        updates[key] = req.body[key];
+      }
+    });
+
+    const user = await User.findByIdAndUpdate(
+      req.user._id,
+      updates,
+      { new: true, runValidators: true }
+    ).select('-__v');
+
+    res.json({
+      success: true,
+      data: user
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+router.get('/stats', auth, async (req, res, next) => {
+  try {
+    const Equity = require('../models/Equity');
+    const Trade = require('../models/Trade');
+
+    const [totalEquities, activeEquities, totalTrades, sellingTrades] = await Promise.all([
+      Equity.countDocuments({ owner: req.user._id }),
+      Equity.countDocuments({ owner: req.user._id, status: 'active' }),
+      Trade.countDocuments({ $or: [{ seller: req.user._id }, { buyer: req.user._id }] }),
+      Trade.countDocuments({ seller: req.user._id, status: 'pending' })
+    ]);
+
+    res.json({
+      success: true,
+      data: {
+        totalEquities,
+        activeEquities,
+        totalTrades,
+        sellingTrades
+      }
+    });
+  } catch (error) {
+    next(error);
+  }
+});
+
+module.exports = router;