✨ create functions to check if the user has a link with whatsapp

backend/src/helpers/GetDefaultWhatsApp.ts

@@ -1,7 +1,17 @@
 import AppError from "../errors/AppError";
 import Whatsapp from "../models/Whatsapp";
+import GetDefaultWhatsAppByUser from "./GetDefaultWhatsAppByUser";
+
+const GetDefaultWhatsApp = async (
+  userId?: number
+): Promise<Whatsapp> => {
+  if(userId) {
+    const whatsappByUser = await GetDefaultWhatsAppByUser(userId);
+    if(whatsappByUser !== null) {
+      return whatsappByUser;
+    }
+  }
 
-const GetDefaultWhatsApp = async (): Promise<Whatsapp> => {
   const defaultWhatsapp = await Whatsapp.findOne({
     where: { isDefault: true }
   });

backend/src/helpers/GetDefaultWhatsAppByUser.ts

@@ -0,0 +1,18 @@
+import User from "../models/User";
+import Whatsapp from "../models/Whatsapp";
+import { logger } from "../utils/logger";
+
+const GetDefaultWhatsAppByUser = async (
+  userId: number
+): Promise<Whatsapp | null> => {
+  const user = await User.findByPk(userId, {include: ["whatsapp"]});
+  if( user === null ) {
+    return null;
+  }
+
+  logger.info(`Found whatsapp linked to user '${user.name}' is '${user.whatsapp.name}'.`);
+
+  return user.whatsapp;
+};
+
+export default GetDefaultWhatsAppByUser;