From ba5d6978de1054daba3fcc2af61f6f78caad2dbc Mon Sep 17 00:00:00 2001
From: AbleKSaju <126228406+AbleKSaju@users.noreply.github.com>
Date: Wed, 18 Sep 2024 10:41:15 +0530
Subject: [PATCH] feat: prevent coupon usage if maximum limit is exceeded

---
 .../AppliedCouponCodes/AppliedCouponCodes.ts      |  8 ++++++++
 models/baseModels/Invoice/Invoice.ts              | 15 +++++++++++++++
 2 files changed, 23 insertions(+)

diff --git a/models/baseModels/AppliedCouponCodes/AppliedCouponCodes.ts b/models/baseModels/AppliedCouponCodes/AppliedCouponCodes.ts
index 318ec9f45..9a4b74901 100644
--- a/models/baseModels/AppliedCouponCodes/AppliedCouponCodes.ts
+++ b/models/baseModels/AppliedCouponCodes/AppliedCouponCodes.ts
@@ -23,10 +23,18 @@ export class AppliedCouponCodes extends InvoiceItem {
           'pricingRule',
           'validFrom',
           'validTo',
+          'maximumUse',
+          'used',
         ],
         filters: { name: value as string },
       });
 
+      if ((coupon[0]?.maximumUse as number) <= (coupon[0]?.used as number)) {
+        throw new ValidationError(
+          'Coupon code has been used maximum number of times'
+        );
+      }
+
       const applicableCouponCodesNames = await getApplicableCouponCodesName(
         value as string,
         this.parentdoc as SalesInvoice
diff --git a/models/baseModels/Invoice/Invoice.ts b/models/baseModels/Invoice/Invoice.ts
index d08d26e0a..f1512ca57 100644
--- a/models/baseModels/Invoice/Invoice.ts
+++ b/models/baseModels/Invoice/Invoice.ts
@@ -218,6 +218,10 @@ export abstract class Invoice extends Transactional {
     }
 
     await this._updateIsItemsReturned();
+
+    if (this.schemaName === ModelNameEnum.SalesInvoice) {
+      this.updateUsedCountOfCoupons();
+    }
   }
 
   async afterCancel() {
@@ -527,6 +531,17 @@ export abstract class Invoice extends Transactional {
     return newReturnDoc;
   }
 
+  updateUsedCountOfCoupons() {
+    this.coupons?.map(async (coupon) => {
+      const couponDoc = await this.fyo.doc.getDoc(
+        ModelNameEnum.CouponCode,
+        coupon.coupons
+      );
+
+      await couponDoc.setAndSync({ used: (couponDoc.used as number) + 1 });
+    });
+  }
+
   async _updateIsItemsReturned() {
     if (!this.isReturn || !this.returnAgainst || this.isQuote) {
       return;