From bab48abcfd0ac15019f672658c03cbfe9a726662 Mon Sep 17 00:00:00 2001
From: jvyden <jvyden@jvyden.xyz>
Date: Thu, 3 Mar 2022 17:24:21 -0500
Subject: [PATCH] Check if user's email address is already used

---
 ProjectLighthouse/Pages/RegisterForm.cshtml.cs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/ProjectLighthouse/Pages/RegisterForm.cshtml.cs b/ProjectLighthouse/Pages/RegisterForm.cshtml.cs
index 5c371aa8..28a70ee3 100644
--- a/ProjectLighthouse/Pages/RegisterForm.cshtml.cs
+++ b/ProjectLighthouse/Pages/RegisterForm.cshtml.cs
@@ -54,6 +54,13 @@ public class RegisterForm : BaseLayout
             return this.Page();
         }
 
+        if (ServerSettings.Instance.SMTPEnabled &&
+            await this.Database.Users.FirstOrDefaultAsync(u => u.EmailAddress.ToLower() == emailAddress.ToLower()) != null)
+        {
+            this.Error = "The email address you've chosen is already taken.";
+            return this.Page();
+        }
+
         if (!await Request.CheckCaptchaValidity())
         {
             this.Error = "You must complete the captcha correctly.";