fixed stuff

api/message-board/message-board.js

@@ -1,7 +1,6 @@
 const express = require("express");
 const fs = require("fs");
 const path = require("path");
-
 const router = express.Router();
 
 // Path for persisting messages
@@ -9,6 +8,10 @@ const MESSAGES_FILE_PATH = path.join(__dirname, 'messages-cache.json');
 
 // In-memory storage with persistence
 let messages = [];
+// Store active polling connections
+let pendingConnections = [];
+// Track the last message ID to help clients know what's new
+let lastMessageId = 0;
 
 // Load existing messages from file if it exists
 function loadMessages() {
@@ -17,6 +20,15 @@ function loadMessages() {
             const data = fs.readFileSync(MESSAGES_FILE_PATH, 'utf8');
             messages = JSON.parse(data);
             console.log(`Loaded ${messages.length} messages from cache`);
+            
+            // Set the initial lastMessageId based on loaded messages
+            if (messages.length > 0) {
+                lastMessageId = messages.length;
+                // Add ID to each message if not present
+                messages.forEach((msg, index) => {
+                    if (!msg.id) msg.id = index + 1;
+                });
+            }
         }
     } catch (error) {
         console.error("Error loading messages from cache:", error);
@@ -32,6 +44,28 @@ function saveMessages() {
     }
 }
 
+// Notify all pending connections about new messages
+function notifyNewMessages() {
+    const connectionsToNotify = [...pendingConnections];
+    pendingConnections = [];
+    
+    connectionsToNotify.forEach(connection => {
+        const { res, lastId } = connection;
+        sendNewMessages(res, lastId);
+    });
+}
+
+// Send new messages to a client
+function sendNewMessages(res, lastKnownId) {
+    const newMessages = messages.filter(msg => msg.id > lastKnownId);
+    const currentLastId = messages.length > 0 ? messages[messages.length - 1].id : lastKnownId;
+    
+    res.json({
+        messages: newMessages,
+        lastId: currentLastId
+    });
+}
+
 // Load messages at startup
 loadMessages();
 
@@ -44,11 +78,16 @@ router.post("/submit", express.json(), (req, res) => {
             return res.status(400).json({ error: "Missing name or message fields" });
         }
         
-        messages.push({ 
+        lastMessageId++;
+        
+        const newMessage = {
+            id: lastMessageId,
             name,
             message,
             time: new Date().toISOString()
-        });
+        };
+        
+        messages.push(newMessage);
         
         // Keep only the latest 100 messages
         if (messages.length > 100) {
@@ -58,6 +97,9 @@ router.post("/submit", express.json(), (req, res) => {
         // Save to file after update
         saveMessages();
         
+        // Notify all waiting clients
+        notifyNewMessages();
+        
         res.json({ success: true, message: "Message received" });
     } catch (error) {
         console.error("Error handling message submission:", error);
@@ -65,7 +107,7 @@ router.post("/submit", express.json(), (req, res) => {
     }
 });
 
-// Get messages as JSON
+// Get all messages as JSON (keep for backward compatibility)
 router.get("/", (req, res) => {
     try {
         res.json({ messages });
@@ -75,6 +117,42 @@ router.get("/", (req, res) => {
     }
 });
 
+// Long polling endpoint for message updates
+router.get("/poll", (req, res) => {
+    try {
+        const lastId = parseInt(req.query.lastId || "0", 10);
+        const newMessages = messages.filter(msg => msg.id > lastId);
+        
+        // If there are new messages, send them immediately
+        if (newMessages.length > 0) {
+            sendNewMessages(res, lastId);
+        } else {
+            // No new messages, set timeout to avoid hanging forever
+            const timeoutId = setTimeout(() => {
+                // Remove this connection from pending list
+                pendingConnections = pendingConnections.filter(conn => conn.res !== res);
+                sendNewMessages(res, lastId);
+            }, 30000); // 30 second timeout
+            
+            // Store the connection for later notification
+            pendingConnections.push({ 
+                res, 
+                lastId,
+                timeoutId
+            });
+            
+            // Handle client disconnect
+            req.on('close', () => {
+                clearTimeout(timeoutId);
+                pendingConnections = pendingConnections.filter(conn => conn.res !== res);
+            });
+        }
+    } catch (error) {
+        console.error("Error in long polling:", error);
+        res.status(500).json({ error: "Internal server error" });
+    }
+});
+
 // Get messages as HTML
 router.get("/html", (req, res) => {
     try {