From a091cbb93aa4f204b2c8af6574b5b5c62eafd853 Mon Sep 17 00:00:00 2001
From: MeiMei <30769358+mei23@users.noreply.github.com>
Date: Wed, 10 Jul 2019 03:47:07 +0900
Subject: Prevent duplicate user registration (#5129)

---
 src/server/api/private/signup.ts | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'src/server')

diff --git a/src/server/api/private/signup.ts b/src/server/api/private/signup.ts
index ca197a6611..ac99ea0d33 100644
--- a/src/server/api/private/signup.ts
+++ b/src/server/api/private/signup.ts
@@ -104,6 +104,13 @@ export default async (ctx: Koa.BaseContext) => {
 
 	// Start transaction
 	await getConnection().transaction(async transactionalEntityManager => {
+		const exist = await transactionalEntityManager.findOne(User, {
+			usernameLower: username.toLowerCase(),
+			host: null
+		});
+
+		if (exist) throw 'already registered';
+
 		account = await transactionalEntityManager.save(new User({
 			id: genId(),
 			createdAt: new Date(),
-- 
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