removed currentUsername from localstorage now its streamed from socket, some refactor like changed some socket.to(username) to io.to ( i have no idea whats de diffrence

backend/socket.js

@@ -31,19 +31,17 @@ function initializeSocket(server) {
 
     // open main socket connection
     io.on('connection', (socket) => {
-
         if (!socket.user) {
-            console.log(socket.user);
-            console.log('User not authenticated');
             socket.emit('socket error', 'User not authenticated')
             socket.disconnect();
             return;
         }
         const username = socket.user.username;
-
         // Join a room with the user's username
         socket.join(username);
 
+        io.to(username).emit('username', username);
+
         // chat message event
         socket.on('chat message', async (msgData) => {
             const { content, recipient } = msgData;
@@ -74,6 +72,7 @@ function initializeSocket(server) {
                 console.error('Error fetching inserted message:', err);
             }
         });
+
         socket.on('get messages', async (recipient) => {
             const username = socket.user.username;
             try {
@@ -88,11 +87,10 @@ function initializeSocket(server) {
                 if (result.rows.length > 0) {
                     //const { username: sender, recipient: receiver, content: content, id: id } = result.rows;
 
-                    // useless option
-                    //console.log('Sending historical messages');
-                    socket.emit('messages history', result.rows);
+                    io.to(username).emit('messages history', result.rows);
+
                 } else {
-                    io.emit('no messages');
+                    io.to(username).emit('no messages');
                 }
             } catch (e) {
                 console.error('Error retrieving messages:', e);

frontend/js/chat.js

@@ -3,20 +3,22 @@ const input = document.getElementById('input');
 const recipientForm = document.getElementById('recipientForm');
 const recipientInput = document.getElementById('recipient');
 const messages = document.getElementById('messages');
-const error = document.getElementById('error');
-document.getElementById('input').placeholder = `Send message as: ${localStorage.getItem('username')}`;
+const messageBox = document.getElementById('messageBox');
 let currentRecipient = null;
 
 window.onload = () => {
-    document.getElementById('recipient').focus();
+    initializeRecipient();
+    if(!recipientInput.value){
+        recipientInput.focus();
+    }
 }
 
-1
 function initializeRecipient() {
     const savedRecipient = localStorage.getItem('currentRecipient');
     if (savedRecipient) {
         currentRecipient = savedRecipient;
         recipientInput.value = savedRecipient;
+        input.focus();
         return currentRecipient;
     }
 }
@@ -54,28 +56,32 @@ async function initializeSocket() {
         const initialRecipient = initializeRecipient();
         socket.emit('get messages', initialRecipient);
     });
+    let currentUsername = null;
+    socket.on('username', (username) => {
+        currentUsername = username;
+        document.getElementById('input').placeholder = `Send message as: ${username}`;
+    })
 
     socket.on('chat message', (msg) => {
         console.log('Received message:', msg);
 
         const { username, content, recipient } = msg;
-        console.log('Current recipient:', currentRecipient, 'Sender:', username, 'Recipient:', recipient);
-
-        if (recipient === currentRecipient || username === currentRecipient) {
         const item = document.createElement('li');
         item.textContent = `${username}: ${content}`;
         messages.appendChild(item);
         window.scrollTo(0, document.body.scrollHeight);
-        }
     });
+
+    // If not previous messages found on backend
     socket.on('no messages', () => {
         console.log('No previous messages found');
         messages.innerHTML = '<p>No messages found</p>';
     });
+
+    // Error messages from backend
     socket.on('socket error', (msg) => {
         console.log('There was an error: ', msg)
-        error.innerHTML = msg;
-        messages.innerHTML = '<p>No messages found</p>';
+        messageBox.innerHTML = msg;
     })
     recipientForm.addEventListener('submit', (e) => {
         e.preventDefault();

frontend/js/login.js

@@ -13,11 +13,6 @@ function showPasswd() {
     }
 }
 
-document.querySelector('form').addEventListener('submit', () => {
-    const username = document.getElementById('username').value;
-    localStorage.setItem('username', username);
-})
-
 document.getElementById('loginForm').addEventListener('submit', async (e) => {
     e.preventDefault()
     const username = document.getElementById('username').value.trim();

frontend/routes/chat.html

@@ -8,8 +8,11 @@
     <title>Chat</title>
 <link rel="stylesheet" href="/static/stylesheet/chat.css">
 </head>
-
 <body>
+<div>
+    <ul id="contacts"></ul>
+</div>
+
 <form id="recipientForm">
     <input id="recipient" autocomplete="off" placeholder="Enter recipient"/>
     <button type="submit">Set recipient</button>
@@ -20,7 +23,7 @@
 
 <form id="form" action="">
     <input id="input" autocomplete="off" placeholder="Enter message"/>
-    <p id="error"></p>
+    <p id="messageBox"></p>
     <button type="submit">Send</button>
     <button type="button" id="settings" onclick="document.location.href='/settings';">Settings</button>
 </form>

frontend/stylesheet/chat.css

@@ -128,3 +128,7 @@ p {
     font-size: 20px;
     color: #e0e0e0;
 }
+
+#messageBox {
+    color: red;
+}

index.js

@@ -247,15 +247,14 @@ async function loginUser(req, res) {
                     req.session.username = username;
                     res.status(200).json({ message: 'Successfully logged in' });
             } else {
-                res.send('Incorrect Username or Password!');
                 return res.status(401).json({ message: 'Incorrect Username or Password!'})
             }
         } catch (error) {
             console.error('Error executing query', error);
-            res.status(500).send('Error executing query');
+            res.status(500).json({ message: 'Internal server error' });
         }
     } else {
-        res.send('Please enter Username and Password!');
+        res.status(400).json({ message: 'Please enter Username and Password!' });
     }
     res.end();
 }