verif pseudo backend

BackEnd/src/controller/UserController.class.php

@@ -116,6 +116,12 @@ class UserController extends Controller
             return new Response(422, $message);
         }
 
+        // Check if login/pseudo is already used
+        if (User::checkLogin($array['login'])) {
+            $message = json_encode(["message" => 'This pseudo is already used']);
+            return new Response(422, $message);
+        }
+
         // Fill facultative field
         if (!isset($array['avatar'])){
             $array['avatar'] = '';

BackEnd/src/model/User.class.php

@@ -35,6 +35,12 @@ class User extends Model
         $stm = parent::exec('USER_UPDATE', $array);
     }
 
+    public static function checkLogin($login)
+    {
+        $stm = parent::exec('USER_CHECK_LOGIN', ['login' => $login]);
+        return $stm->fetch();
+    }
+
     public static function tryLogin($login)
     {
         $stm = parent::exec('USER_GET_WITH_LOGIN', ['login' => $login]);

BackEnd/src/sql/User.sql.php

@@ -5,6 +5,11 @@ User::addSqlQuery(
     'SELECT * FROM MJ_USER ORDER BY LOGIN'
 );
 
+User::addSqlQuery(
+    'USER_CHECK_LOGIN',
+    'SELECT LOGIN FROM MJ_USER WHERE LOGIN=:login'
+);
+
 User::addSqlQuery(
     'USER_GET_WITH_LOGIN',
     'SELECT * FROM MJ_USER WHERE LOGIN=:login'