Initial commit

server/controllers/inventoryController.js

@@ -0,0 +1,85 @@
+const Product = require('../models/Product');
+const InventoryHistory = require('../models/InventoryHistory');
+const { successResponse, errorResponse } = require('../utils/apiResponse');
+
+// @desc    Get stock overview & alerts (Admin)
+// @route   GET /api/inventory/overview
+// @access  Private/Admin
+const getStockOverview = async (req, res, next) => {
+  try {
+    const products = await Product.find({})
+      .select('name sku stock lowStockThreshold price category brand images')
+      .populate('category', 'name')
+      .populate('brand', 'name');
+
+    const lowStock = products.filter(p => p.stock > 0 && p.stock <= p.lowStockThreshold);
+    const outOfStock = products.filter(p => p.stock === 0);
+
+    return successResponse(res, 'Stock overview retrieved', {
+      totalProducts: products.length,
+      lowStockCount: lowStock.length,
+      outOfStockCount: outOfStock.length,
+      lowStock,
+      outOfStock,
+      products
+    });
+  } catch (error) {
+    next(error);
+  }
+};
+
+// @desc    Adjust inventory stock level (Admin)
+// @route   POST /api/inventory/adjust
+// @access  Private/Admin
+const adjustStock = async (req, res, next) => {
+  try {
+    const { productId, newStock, reason, changeType = 'Manual Adjustment' } = req.body;
+
+    const product = await Product.findById(productId);
+    if (!product) {
+      return errorResponse(res, 'Product not found', [], 404);
+    }
+
+    const previousStock = product.stock;
+    const quantityChanged = Number(newStock) - previousStock;
+
+    product.stock = Number(newStock);
+    await product.save();
+
+    // Log history
+    const history = await InventoryHistory.create({
+      product: product._id,
+      sku: product.sku,
+      changeType,
+      quantityChanged,
+      previousStock,
+      newStock: product.stock,
+      reason: reason || 'Manual admin inventory adjustment',
+      performedBy: req.user._id
+    });
+
+    return successResponse(res, 'Stock adjusted successfully', { product, history });
+  } catch (error) {
+    next(error);
+  }
+};
+
+// @desc    Get complete inventory change audit log (Admin)
+// @route   GET /api/inventory/history
+// @access  Private/Admin
+const getInventoryHistory = async (req, res, next) => {
+  try {
+    const history = await InventoryHistory.find({})
+      .populate('product', 'name images')
+      .populate('performedBy', 'name email')
+      .sort({ createdAt: -1 })
+      .limit(100);
+
+    return successResponse(res, 'Inventory history audit log retrieved', history);
+  } catch (error) {
+    next(error);
+  }
+};
+
+module.exports = { getStockOverview, adjustStock, getInventoryHistory };
+