fix: User Name always be unique

feat : customer can login with user name or customer number

src/controllers/auth.controller.js

@@ -9,10 +9,10 @@ const { setJson, getJson } = require('../config/redis');
 
 
 async function login(req, res) {
-  const { customerNo, password, otp } = req.body;
+  let { customerNo, userName, password, otp } = req.body;
   const loginType = req.headers['x-login-type'] || 'standard';
 
-  if (!customerNo || !password) {
+  if ((!customerNo && !userName) || !password) {
     return res.status(400).json({ error: 'customerNo and password are required' });
   }
   const currentTime = new Date().toISOString();
@@ -22,6 +22,17 @@ async function login(req, res) {
     // --- Step 1: Check if user is already locked ---
     const blockedKey = `login:blocked:${customerNo}`;
     const attemptsKey = `login:attempts:${customerNo}`;
+    if (!customerNo && userName) {
+      const result = await db.query('SELECT * FROM users WHERE preferred_name = $1', [
+        userName,
+      ]);
+      if (result.rows.length === 0) {
+        logger.error("Customer not found with this user name.");
+        return res.status(404).json({ error: 'No user found with this username.' });
+      }
+      logger.info("Customer found with user name.");
+      customerNo = result.rows[0].customer_no;
+    }
 
     const userCheck = await authService.findUserByCustomerNo(customerNo);
 
@@ -29,6 +40,7 @@ async function login(req, res) {
       // check DB locked flag
       if (userCheck && userCheck.locked) {
         await setJson(blockedKey, true, BLOCK_DURATION);
+        logger.error("USER Account Locked");
         return res.status(423).json({
           error: 'Your account is locked. Please contact the administrator.',
         });
@@ -275,6 +287,11 @@ async function setUserName(req, res) {
     }
     const userNameIsExits = await authService.CheckUserName(customerNo);
     const { user_name } = req.body;
+
+    if (!user_name) {
+      return res.status(400).json({ error: 'Username is required' });
+    }
+
     if (!userNameIsExits) {
       await authService.setUserName(customerNo, user_name);
       logger.info('User name has been set for first time.');
@@ -292,7 +309,7 @@ async function setUserName(req, res) {
       // Cannot match last 2
       const lastTwo = history.slice(0, 2);
       if (lastTwo.includes(user_name.toLowerCase())) {
-        return res.status(409).json({ error: "Preferred name cannot match last 2 preferred names"});
+        return res.status(409).json({ error: "Preferred name cannot match last 2 preferred names" });
       }
       await authService.setUserName(customerNo, user_name);
       logger.info('User name has been updated.');

src/services/auth.service.js

@@ -157,6 +157,9 @@ async function setUserName(customerNo, username) {
     );
     logger.info("preferred_name_history table updated");
   } catch (error) {
+    if (error.code === '23505') {
+      throw new Error('PREFERRED_NAME_ALREADY_EXISTS');
+    }
     throw new Error(
       `error occured while  setting new preferred name ${error.message}`
     );