Re adding per room topic counts

app.js

@@ -14,7 +14,6 @@ const drive = new Hyperdrive(store);
 await drive.ready();
 
 let swarm;
-let peerCount = 0;
 let activeRooms = [];
 const eventEmitter = new EventEmitter();
 
@@ -32,6 +31,12 @@ let config = {
 // Store messages for each room
 let messagesStore = {};
 
+// Store peer counts for each room
+let peerCounts = {};
+
+// Map to store discovery instances and their associated topics
+const discoveryTopicsMap = new Map();
+
 // Function to get a random port between 49152 and 65535
 function getRandomPort() {
   return Math.floor(Math.random() * (65535 - 49152 + 1)) + 49152;
@@ -155,31 +160,47 @@ async function initialize() {
     });
 
     swarm.on('connection', async (connection, info) => {
-      peerCount++;
-      updatePeerCount();
-      console.log('Peer connected, current peer count:', peerCount);
+      try {
+        const discovery = [...discoveryTopicsMap.entries()].find(([key, value]) => key.id === info.id);
+        const topic = discovery ? discovery[1] : null;
 
-      // Send the current user's icon to the new peer
-      const iconBuffer = await drive.get(`/icons/${config.userName}.png`);
-      if (iconBuffer) {
-        const iconMessage = JSON.stringify({
-          type: 'icon',
-          username: config.userName,
-          avatar: b4a.toString(iconBuffer, 'base64'),
+        if (!topic) {
+          console.error('No topic found in connection info:', info);
+          return;
+        }
+
+        if (!peerCounts[topic]) {
+          peerCounts[topic] = 0;
+        }
+        peerCounts[topic]++;
+        updatePeerCount(topic);
+        console.log('Peer connected, current peer count:', peerCounts[topic]);
+
+        // Send the current user's icon to the new peer
+        const iconBuffer = await drive.get(`/icons/${config.userName}.png`);
+        if (iconBuffer) {
+          const iconMessage = JSON.stringify({
+            type: 'icon',
+            username: config.userName,
+            avatar: b4a.toString(iconBuffer, 'base64'),
+            topic
+          });
+          connection.write(iconMessage);
+        }
+
+        connection.on('data', (data) => {
+          const messageObj = JSON.parse(data.toString());
+          eventEmitter.emit('onMessage', messageObj);
         });
-        connection.write(iconMessage);
+
+        connection.on('close', () => {
+          peerCounts[topic]--;
+          updatePeerCount(topic);
+          console.log('Peer disconnected, current peer count:', peerCounts[topic]);
+        });
+      } catch (error) {
+        console.error('Error handling connection:', error);
       }
-
-      connection.on('data', (data) => {
-        const messageObj = JSON.parse(data.toString());
-        eventEmitter.emit('onMessage', messageObj);
-      });
-
-      connection.on('close', () => {
-        peerCount--;
-        updatePeerCount();
-        console.log('Peer disconnected, current peer count:', peerCount);
-      });
     });
 
     swarm.on('error', (err) => {
@@ -330,6 +351,10 @@ async function joinSwarm(topicBuffer) {
       await discovery.flushed();
 
       activeRooms.push({ topic, discovery });
+      peerCounts[topic] = 0; // Initialize peer count for the new room
+
+      // Store the topic in the map
+      discoveryTopicsMap.set(discovery, topic);
 
       console.log('Joined room:', topic); // Debugging log
 
@@ -343,9 +368,13 @@ async function joinSwarm(topicBuffer) {
 function addRoomToList(topic) {
   const roomList = document.querySelector('#room-list');
   const roomItem = document.createElement('li');
-  roomItem.textContent = truncateHash(topic);
   roomItem.dataset.topic = topic;
 
+  const roomName = document.createElement('span');
+  roomName.textContent = truncateHash(topic);
+
+  roomItem.appendChild(roomName);
+
   roomItem.addEventListener('dblclick', () => enterEditMode(roomItem));
   roomItem.addEventListener('click', () => switchRoom(topic));
   roomList.appendChild(roomItem);
@@ -433,6 +462,9 @@ function switchRoom(topic) {
   // Show chat UI elements
   document.querySelector('#chat').classList.remove('hidden');
   document.querySelector('#setup').classList.add('hidden');
+
+  // Update the peer count in the header
+  updateHeaderPeerCount(topic);
 }
 
 function leaveRoom(topic) {
@@ -441,6 +473,7 @@ function leaveRoom(topic) {
     const room = activeRooms[roomIndex];
     room.discovery.destroy();
     activeRooms.splice(roomIndex, 1);
+    discoveryTopicsMap.delete(room.discovery);
   }
 
   const roomItem = document.querySelector(`li[data-topic="${topic}"]`);
@@ -568,10 +601,32 @@ function addFileMessage(from, fileName, fileUrl, fileType, avatar, topic) {
   }
 }
 
-function updatePeerCount() {
+function updatePeerCount(topic) {
+  let peerCountElement = document.querySelector(`#peers-count-${topic}`);
+  if (!peerCountElement) {
+    const roomItem = document.querySelector(`#room-list li[data-topic="${topic}"]`);
+    if (roomItem) {
+      peerCountElement = document.createElement('span');
+      peerCountElement.id = `peers-count-${topic}`;
+      // roomItem.appendChild(peerCountElement);
+    }
+  }
+  if (peerCountElement) {
+    peerCountElement.textContent = ` (${peerCounts[topic]})`; // Display the peer count for the specific topic
+  }
+
+  // Update the header peer count if the current room matches the topic
+  const currentTopic = document.querySelector('#chat-room-topic').innerText;
+  if (currentTopic === topic) {
+    updateHeaderPeerCount(topic);
+  }
+}
+
+function updateHeaderPeerCount(topic) {
   const peerCountElement = document.querySelector('#peers-count');
   if (peerCountElement) {
-    peerCountElement.textContent = peerCount; // Display the actual peer count
+    const peerCount = peerCounts[topic] || 0;
+    peerCountElement.textContent = peerCount;
   }
 }