From a31e6b4c66494e63880db304c9a642ede4e3dbce Mon Sep 17 00:00:00 2001
From: xfarrow <xfarrow@doesnotexist.org>
Date: Sun, 18 Feb 2024 12:14:24 +0100
Subject: [PATCH] check email already in use

---
 backend/apis/nodejs/api_controller.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/backend/apis/nodejs/api_controller.js b/backend/apis/nodejs/api_controller.js
index 7b11561..ba053ca 100644
--- a/backend/apis/nodejs/api_controller.js
+++ b/backend/apis/nodejs/api_controller.js
@@ -59,6 +59,16 @@ async function registerPerson(req, res){
     const hashPasswordPromise = bcrypt.hash(req.body.password, 10);
 
     try{
+
+      // Check whether e-mail exists already (enforced by database constraints)
+      const existingUser = await knex('Person')
+        .where('email', req.body.email)
+        .first();
+
+        if(existingUser){
+          return res.status(409).json({ error: "E-mail already in use" });
+        }
+
         // We need to insert either both in the "Person" table
         // and in the "ActivationLink" one, or in neither
         await knex.transaction(async (tr) => {