feat(users): add conditional UTM parameter inclusion in user data and update validation return type

Author: Dobrunia

src/models/usersFactory.ts

@@ -76,9 +76,12 @@ export default class UsersFactory extends AbstractModelFactory<UserDBScheme, Use
       email,
       password: hashedPassword,
       notifications: UserModel.generateDefaultNotificationsSettings(email),
-      utm: utm,
     };
 
+    if (utm && Object.keys(utm).length > 0) {
+      userData.utm = utm;
+    }
+
     const userId = (await this.collection.insertOne(userData)).insertedId;
 
     const user = new UserModel({

src/utils/utm/utm.ts

@@ -19,9 +19,9 @@ const MAX_UTM_VALUE_LENGTH = 50;
  * @param {Object} utm - UTM parameters to validate
  * @returns {Object} - filtered valid UTM parameters
  */
-export function validateUtmParams(utm: any): Record<string, string> {
+export function validateUtmParams(utm: any): Record<string, string> | undefined {
   if (!utm || typeof utm !== 'object' || Array.isArray(utm)) {
-    return {};
+    return undefined;
   }
 
   const result: Record<string, string> = {};