From b2e57ab64ba0f5f4ff0c776ecc19c911c3710d46 Mon Sep 17 00:00:00 2001
From: AvilaAndre <avila_andre14@hotmail.com>
Date: Wed, 12 Feb 2025 00:07:36 +0000
Subject: [PATCH] feat: avoid duplicated referral

---
 website/app/models/user.ts               | 4 ++++
 website/app/services/referral_service.ts | 4 ++++
 2 files changed, 8 insertions(+)

diff --git a/website/app/models/user.ts b/website/app/models/user.ts
index 726ff9b..b28f668 100644
--- a/website/app/models/user.ts
+++ b/website/app/models/user.ts
@@ -72,6 +72,10 @@ export default class User extends compose(BaseModel, HasReferralLink) {
     return this.emailVerifiedAt !== null
   }
 
+  hasBeenReferred() {
+    return this.referredByUserId !== null;
+  }
+
   public getPromoterCode: () => number = () => {
     return this.id;
   }
diff --git a/website/app/services/referral_service.ts b/website/app/services/referral_service.ts
index 618a0ba..b6946f5 100644
--- a/website/app/services/referral_service.ts
+++ b/website/app/services/referral_service.ts
@@ -21,6 +21,10 @@ export default class ReferralService {
     if (referredUser.isPromoter())
       return
 
+    // cannot use a referral more than once
+    if (referredUser.hasBeenReferred())
+      return
+
     const referralUserId = ReferralService.decode(referralCode)
     if (!referralUserId) return