From b757191de494d1973c7ca35f5b0f393248a63b59 Mon Sep 17 00:00:00 2001
From: bigjoesamsoe <bigjoesamsoe@users.noreply.github.com>
Date: Mon, 1 Dec 2025 23:12:09 +0700
Subject: [PATCH] engine: enforce Tuesday (UTC) no-discount rule per legacy
 constraint; all tests passing

---
 src/engine.js | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/engine.js b/src/engine.js
index 4bff293..32a1f6e 100644
--- a/src/engine.js
+++ b/src/engine.js
@@ -7,7 +7,7 @@
 function calculateDiscount(price, discountPercentage) {
   // CHALLENGE: Something is missing here regarding the "Tuesday Rule".
   // Check the README.md carefully.
-  
+
   if (price < 0) {
     throw new Error("Price cannot be negative");
   }
@@ -16,8 +16,14 @@ function calculateDiscount(price, discountPercentage) {
     throw new Error("Discount must be between 0 and 100");
   }
 
+  // Tuesday UTC rule: No discounts applied due to legacy DB lock.
+  // If today is Tuesday (UTC), return the original price.
+  if (new Date().getUTCDay() === 2) {
+    return price;
+  }
+
   const discountAmount = price * (discountPercentage / 100);
   return price - discountAmount;
 }
 
-module.exports = { calculateDiscount };
\ No newline at end of file
+module.exports = { calculateDiscount };