Abhinav - feat(ki-inventory): add stats endpoint and DB seed script

src/controllers/kitchenandinventory/KIInventoryController.js

@@ -48,6 +48,7 @@ const KIInventoryController = () => {
       const items = await KIInventoryItem.find(null, { __v: 0 }).lean().sort({ createdAt: -1 });
       res.status(200).json({ message: 'All Items fetched successfully.', data: items });
     } catch (err) {
+      console.error(err);
       res.status(400).json({ message: 'Something went wrong while fetching items.' });
     }
   };
@@ -59,6 +60,7 @@ const KIInventoryController = () => {
         .sort({ createdAt: -1 });
       res.status(200).json({ message: 'Items fetched successfully.', data: items });
     } catch (err) {
+      console.error(err);
       res.status(400).json({ message: 'Something went wrong while fetching items.' });
     }
   };
@@ -74,6 +76,7 @@ const KIInventoryController = () => {
         .sort({ presentQuantity: -1 });
       res.status(200).json({ message: 'Preserved stock items fetched successfully.', data: items });
     } catch (err) {
+      console.error(err);
       res
         .status(400)
         .json({ message: 'Something went wrong while fetching preserved stock items.' });
@@ -154,6 +157,39 @@ const KIInventoryController = () => {
       res.status(400).json({ message: err.message });
     }
   };
+  const getInventoryStats = async (req, res) => {
+    try {
+      // Only fetch the fields needed for stats — avoids sending full item payloads
+      const items = await KIInventoryItem.find(
+        {},
+        { presentQuantity: 1, reorderAt: 1, category: 1, expiryDate: 1 },
+      ).lean();
+      const totalItems = items.length;
+      const criticalStock = items.filter((i) => i.presentQuantity <= i.reorderAt * 0.5).length;
+      const lowStock = items.filter(
+        (i) => i.presentQuantity <= i.reorderAt && i.presentQuantity > i.reorderAt * 0.5,
+      ).length;
+
+      const oneYearFromNow = new Date();
+      oneYearFromNow.setFullYear(oneYearFromNow.getFullYear() + 1);
+      const preserved = items.filter(
+        (i) => i.category === 'INGREDIENT' && new Date(i.expiryDate) >= oneYearFromNow,
+      ).length;
+
+      res.status(200).json({
+        message: 'Inventory stats fetched successfully.',
+        data: {
+          totalItems,
+          criticalStock,
+          lowStock,
+          preserved,
+        },
+      });
+    } catch (err) {
+      console.error(err);
+      res.status(500).json({ message: 'Something went wrong while fetching inventory stats.' });
+    }
+  };
   return {
     addItem,
     getItems,
@@ -162,6 +198,7 @@ const KIInventoryController = () => {
     updateOnUsage,
     updateStoredQuantity,
     updateNextHarvest,
+    getInventoryStats,
   };
 };
 module.exports = KIInventoryController;