Fixed multi user issue. merge.js now merges all chunks.

index.js

@@ -1,12 +1,12 @@
-const Discord = require("discord.js");
+const Discord = require('discord.js');
 const client = new Discord.Client();
 
 const fs = require('fs');
 const config = require('./config.json');
 
-const appendChunkToFile = (fileName) => {
-    const pathToFile = __dirname + `/recordings/${fileName}.pcm`;
-    return fs.createWriteStream(pathToFile, { flags: 'a' });
+const createNewChunk = () => {
+    const pathToFile = __dirname + `/recordings/${Date.now()}.pcm`;
+    return fs.createWriteStream(pathToFile);
 };
 
 client.on('message', msg => {
@@ -14,7 +14,7 @@ client.on('message', msg => {
         const commandBody = msg.content.substring(config.PREFIX.length).split(' ');
         const channelName = commandBody[1];
 
-        if (commandBody[0] === ('enter') && commandBody[1] && commandBody[2]) {
+        if (commandBody[0] === ('enter') && commandBody[1]) {
             const voiceChannel = msg.guild.channels.cache.find(channel => channel.name === channelName);
 
             if (!voiceChannel || voiceChannel.type !== 'voice')
@@ -34,7 +34,7 @@ client.on('message', msg => {
                         if (speaking) {
                             console.log(`${user.username} started speaking`);
                             const audioStream = receiver.createStream(user, { mode: 'pcm' });
-                            audioStream.pipe(appendChunkToFile(commandBody[2]));
+                            audioStream.pipe(createNewChunk());
                             audioStream.on('end', () => { console.log(`${user.username} stopped speaking`); });
                         }
                     });
@@ -43,11 +43,16 @@ client.on('message', msg => {
         }
         if (commandBody[0] === ('exit') && commandBody[1]) {
             const voiceChannel = msg.guild.channels.cache.find(channel => channel.name === channelName);
-            console.log(`Slipping out of ${voiceChannel.name}...`);
+            if (!voiceChannel || voiceChannel.type !== 'voice') {
+                return msg.reply(`The channel #${channelName} doesn't exist or isn't a voice channel.`);
+            }
+            else {
                 voiceChannel.leave();
+                console.log(`Slipping out of ${voiceChannel.name}...`);
                 console.log(`\nSTOPPED RECORDING\n`);
             }
         }
+    }
 });
 
 client.login(config.BOT_TOKEN);

merge.js

@@ -0,0 +1,26 @@
+var fs = require('fs'),
+    chunks = fs.readdirSync('./recordings'),
+    inputStream,
+    currentfile,
+    outputStream = fs.createWriteStream('./recordings/merge.pcm');
+
+chunks.sort((a, b) => { return a - b; });
+
+function appendFiles() {
+    if (!chunks.length) {
+        outputStream.end(() => console.log('Finished.'));
+        return;
+    }
+
+    currentfile = './recordings/' + chunks.shift();
+    inputStream = fs.createReadStream(currentfile);
+    
+    inputStream.pipe(outputStream, { end: false });
+
+    inputStream.on('end', function() {
+        console.log(currentfile + ' appended');
+        appendFiles();        
+    });
+}
+
+appendFiles();

package-lock.json

@@ -1,5 +1,5 @@
 {
-  "name": "discord-bot",
+  "name": "discord-voice-recorder",
   "version": "1.0.0",
   "lockfileVersion": 1,
   "requires": true,
@@ -343,9 +343,9 @@
       "integrity": "sha512-Ntyt4AIXyaLIuMHF6IOoTakB3K+RWxwtsHNRxllEoA6vPwP9o4866g6YWDLUdnucilZhmkxiHwHr11gAENw+QA=="
     },
     "node-fetch": {
-      "version": "2.6.0",
-      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.0.tgz",
-      "integrity": "sha512-8dG4H5ujfvFiqDmVu9fQ5bOHUC15JMjMY/Zumv26oOvvVJjM67KF8koCWIabKQ1GJIa9r2mMZscBq/TbdOcmNA=="
+      "version": "2.6.1",
+      "resolved": "https://registry.npmjs.org/node-fetch/-/node-fetch-2.6.1.tgz",
+      "integrity": "sha512-V4aYg89jEoVRxRb2fJdAg8FHvI7cEyYdVAh94HH0UIK8oJxUfkjlDQN9RbMx+bEjP7+ggMiFRprSti032Oipxw=="
     },
     "nopt": {
       "version": "4.0.3",