Adding a new map to allow topics to remain open after a peer leaves, also added peer removal to ensure timeouts do not happen

bot.js

@@ -4,6 +4,13 @@ const crypto = require('hypercore-crypto');
 const { Client, GatewayIntentBits, Partials, messageLink } = require("discord.js");
 const goodbye = require('graceful-goodbye')
 require('dotenv').config()
+const b4a = require('b4a')
+
+function sleep(ms) {
+    return new Promise((resolve) => {
+        setTimeout(resolve, ms);
+    });
+}
 
 const client = new Client({
     'intents': [
@@ -15,15 +22,13 @@ const client = new Client({
         GatewayIntentBits.GuildMessages
     ],
     'partials': [Partials.Channel, Partials.Message, Partials.MessageContent]
-  });
+});
+
+
 
 const topicMap = new Map();
-  goodbye(() => {
+const swarmMap = new Map();
-    for(let [channel_id, topic_obj] of topicMap)
+
-    {
-        topic_obj.swarm.destroy();
-    }
-    })
 
 client.on('ready', () => {
     console.log(`Logged in as ${client.user.tag}!`);
@@ -31,17 +36,16 @@ client.on('ready', () => {
 
 client.on('messageCreate', msg => {
 
-  if (msg.content.startsWith("!") && !msg.author.bot){
+    if (msg.content.startsWith("!") && !msg.author.bot) {
         const args = msg.content.split(" ");
         const cmd = args.shift().slice(1);
 
-    if (cmd === "current-topic") {
+        if (cmd === "current") {
-        if(topicMap.has(msg.channel.id))
+            if (topicMap.has(msg.channel.id)) {
-        {
                 let topic_obj = topicMap.get(msg.channel.id);
                 msg.reply(`The current topic for this channel is: ${topic_obj.topic.toString('hex')}`);
             }
-            else{
+            else {
                 msg.reply(`No topic is assigned for this channel`);
             }
         }
@@ -53,43 +57,44 @@ client.on('messageCreate', msg => {
             }
             let topic = crypto.randomBytes(32);
             let channel_id = args[1];
-            if(!channel_id)
+            if (!channel_id) {
-            {
                 msg.reply("Please provide a channel_id to send this topic's messages")
                 return;
             }
             //Check if the given channel_id exists or not.
-            if(!client.channels.cache.get(channel_id))
+            if (!client.channels.cache.get(channel_id)) {
-            {
                 msg.reply("The provided channel id does not exist.");
                 return;
             }
             let swarm;
-            let conns =[];
+            let conns = [];
-            if(topicMap.has(channel_id))
+            if (topicMap.has(channel_id)) {
-            {
                 topic_obj = topicMap.get(channel_id);
                 swarm = topic_obj.swarm;
                 conns = topic_obj.conns;
             }
-            else
+            else {
-            {
                 swarm = new Hyperswarm();
-                topicMap.set(channel_id, {topic: topic, swarm: swarm, conns: conns});
+                topicMap.set(channel_id, { topic: topic, swarm: swarm, conns: conns });
                 // Join the new topic
                 swarm.join(topic, {
                     lookup: true,
                     announce: true,
-                    timeout: 30000
+                    timeout: 60000
                 });
+
+
                 swarm.on('connection', (conn, info) => {
-                    console.log(`Connected to a peer for topic ${topic.toString('hex')}`);
+                    console.log(`Connected to a peer`);
                     conns.push(conn);
                     conn.on('data', data => {
                         // Send the message from the topic to the Discord channel
-                        client.channels.fetch(channel_id).then(channel=>channel.send(data.toString()))
+                        client.channels.fetch(channel_id).then(channel => channel.send(data.toString()))
                     });
+
+                    conn.on('close', () => clearInterval(checkInactiveInterval))
                 });
+
                 client.channels.fetch(channel_id).then(channel => {
                     msg.reply(`Successfully joined topic and sending messages to ${channel}`);
 
@@ -98,47 +103,75 @@ client.on('messageCreate', msg => {
             }
         }
 
-        if (cmd === "set-topic") {
+        if (cmd === "set") {
+
             let channel_id = msg.channel.id;
             //Check if the given channel_id exists or not.
-            if(!client.channels.cache.get(channel_id))
+            if (!client.channels.cache.get(channel_id)) {
-            {
                 msg.reply("The provided channel id does not exist.");
                 return;
             }
             let topic = crypto.randomBytes(32);
             let swarm;
-            let conns =[];
+            let conns = [];
-            if(topicMap.has(channel_id))
+            if (topicMap.has(channel_id)) {
-            {
                 topic_obj = topicMap.get(channel_id);
-                topic_obj.swarm.leave(topic_obj.topic);
-                topic_obj.topic = topic;
-                swarm = topic_obj.swarm;
                 conns = topic_obj.conns;
             }
-            else{
+            else {
+                topicMap.set(channel_id, { topic: topic, conns: conns });
+            }
+            if (!swarmMap.has(topic)) {
                 swarm = new Hyperswarm();
-                conns = [];
+                swarmMap.set(topic, swarm);
-                topicMap.set(channel_id, {topic: topic, swarm: swarm, conns: conns});
                 // Join the new topic
                 swarm.join(topic, {
                     lookup: true,
                     announce: true,
-                    timeout: 30000
+                    timeout: 60000
                 });
                 swarm.on('connection', (conn, info) => {
                     console.log(`Connected to a peer for topic ${topic.toString('hex')}`);
                     conns.push(conn);
                     conn.on('data', data => {
-                        // Send the message from the topic to the Discord channel
+                        console.log(data.toString())
-                        client.channels.fetch(channel_id).then(channel=>channel.send(data.toString()))
+                        if (data.toString().startsWith('CLOSED:')) {
+                            // Extract the key from the message string
+                            const key = data.toString().split(':')[1].trim();
+                            // Iterate through the conns array and remove the client with the matching key
+                            console.log(`Removing peer ${key}`);
+                            (async () => {
+
+                                await sleep(5000)
+                                conns = conns.filter(c => c !== conn);
+                                conn.destroy();
+                            })();
+
+
+                        } else {
+                            client.channels.fetch(channel_id).then(channel => channel.send(data.toString()))
+                        }
                     });
                 });
+                client.channels.fetch(channel_id).then(channel => {
+                    msg.reply(`Successfully joined topic and sending messages to ${channel}`);
+
+                });
+            } else {
+                swarm = swarmMap.get(topic);
+                swarm.join(topic, {
+                    lookup: true,
+                    announce: true,
+                    timeout: 60000
+                });
+                client.channels.fetch(channel_id).then(channel => {
+                    msg.reply(`Successfully joined topic and sending messages to ${channel}`);
+                });
             }
-            msg.reply(`Successfully set topic ${topic.toString('hex')} for channel ${channel_id}`);
         }
 
+
+
         if (cmd === "leave-topic") {
             let channel_id = msg.channel.id;
             let topic_obj = topicMap.get(channel_id);
@@ -153,13 +186,14 @@ client.on('messageCreate', msg => {
 
     }
     // Check if message is sent in a channel with a topic assigned and send it to the topic
-        if(topicMap.has(msg.channel.id) && !msg.author.bot){
+    if (topicMap.has(msg.channel.id) && !msg.author.bot) {
         let topic_obj = topicMap.get(msg.channel.id);
         let conns = topic_obj.conns;
         for (const conn of conns) {
+
             conn.write(`${msg.author.username}(Discord): ${msg.content}`);
         }
     }
-    });
+});
 
-    client.login(process.env.TOKEN);
+client.login(process.env.TOKEN);