pricing tiers

backend/routes/rentals.js

@@ -3,6 +3,7 @@ const { Op } = require("sequelize");
 const { Rental, Item, User } = require("../models"); // Import from models/index.js to get models with associations
 const { authenticateToken, requireVerifiedEmail } = require("../middleware/auth");
 const FeeCalculator = require("../utils/feeCalculator");
+const RentalDurationCalculator = require("../utils/rentalDurationCalculator");
 const RefundService = require("../services/refundService");
 const LateReturnService = require("../services/lateReturnService");
 const DamageAssessmentService = require("../services/damageAssessmentService");
@@ -201,19 +202,12 @@ router.post("/", authenticateToken, requireVerifiedEmail, async (req, res) => {
     rentalStartDateTime = new Date(startDateTime);
     rentalEndDateTime = new Date(endDateTime);
 
-    // Calculate rental duration
-    const diffMs = rentalEndDateTime.getTime() - rentalStartDateTime.getTime();
-    const diffHours = Math.ceil(diffMs / (1000 * 60 * 60));
-    const diffDays = Math.ceil(diffMs / (1000 * 60 * 60 * 24));
-
-    // Calculate base amount based on duration
-    if (item.pricePerHour && diffHours <= 24) {
-      totalAmount = diffHours * Number(item.pricePerHour);
-    } else if (item.pricePerDay) {
-      totalAmount = diffDays * Number(item.pricePerDay);
-    } else {
-      totalAmount = 0;
-    }
+    // Calculate rental cost using duration calculator
+    totalAmount = RentalDurationCalculator.calculateRentalCost(
+      rentalStartDateTime,
+      rentalEndDateTime,
+      item
+    );
 
     // Check for overlapping rentals using datetime ranges
     const overlappingRental = await Rental.findOne({
@@ -884,6 +878,60 @@ router.post("/calculate-fees", authenticateToken, async (req, res) => {
   }
 });
 
+// Preview rental cost calculation (no rental creation)
+router.post("/cost-preview", authenticateToken, async (req, res) => {
+  try {
+    const { itemId, startDateTime, endDateTime } = req.body;
+
+    // Validate inputs
+    if (!itemId || !startDateTime || !endDateTime) {
+      return res.status(400).json({
+        error: "itemId, startDateTime, and endDateTime are required",
+      });
+    }
+
+    // Fetch item
+    const item = await Item.findByPk(itemId);
+    if (!item) {
+      return res.status(404).json({ error: "Item not found" });
+    }
+
+    // Parse datetimes
+    const rentalStartDateTime = new Date(startDateTime);
+    const rentalEndDateTime = new Date(endDateTime);
+
+    // Validate date range
+    if (rentalEndDateTime <= rentalStartDateTime) {
+      return res.status(400).json({
+        error: "End date/time must be after start date/time",
+      });
+    }
+
+    // Calculate rental cost using duration calculator
+    const totalAmount = RentalDurationCalculator.calculateRentalCost(
+      rentalStartDateTime,
+      rentalEndDateTime,
+      item
+    );
+
+    // Calculate fees
+    const fees = FeeCalculator.calculateRentalFees(totalAmount);
+
+    res.json({
+      baseAmount: totalAmount,
+      fees,
+    });
+  } catch (error) {
+    const reqLogger = logger.withRequestId(req.id);
+    reqLogger.error("Error calculating rental cost preview", {
+      error: error.message,
+      stack: error.stack,
+      userId: req.user.id,
+    });
+    res.status(500).json({ error: "Failed to calculate rental cost preview" });
+  }
+});
+
 // Get earnings status for owner's rentals
 router.get("/earnings/status", authenticateToken, async (req, res) => {
   try {