From f35e5db1a99adbc65533ca036bf38a7b48cc8e04 Mon Sep 17 00:00:00 2001
From: qowevisa <qowevisa@gmail.com>
Date: Fri, 2 Aug 2024 23:36:55 +0300
Subject: [PATCH] Create user in database

---
 db/user.go | 29 +++++++++++++++++++++++++++++
 1 file changed, 29 insertions(+)
 create mode 100644 db/user.go

diff --git a/db/user.go b/db/user.go
new file mode 100644
index 0000000..7bea1f5
--- /dev/null
+++ b/db/user.go
@@ -0,0 +1,29 @@
+package db
+
+import (
+	"errors"
+
+	"gorm.io/gorm"
+)
+
+type User struct {
+	gorm.Model
+	Username string
+	Password string
+}
+
+var (
+	ERROR_USER_USERNAME_NOT_UNIQUE = errors.New("Username already persists in database")
+)
+
+func (u *User) BeforeCreate(ctx *gorm.DB) error {
+	var duplicate User
+	err := ctx.Find(&duplicate, User{Username: u.Username}).Error
+	if err != nil {
+		return err
+	}
+	if duplicate.ID != 0 {
+		return ERROR_USER_USERNAME_NOT_UNIQUE
+	}
+	return nil
+}