Add audio queue

AudioQueue.js

@@ -0,0 +1,23 @@
+module.exports = class AudioQueue {
+    constructor(connection) {
+        this.connection = connection;
+        this.queue = [];
+        this.current = undefined;
+    }
+    playNext() {
+        if (this.queue.length == 0) {
+            this.current = undefined;
+            return;
+        }
+        this.current = this.connection.play(this.queue[0]);
+        this.current.on('speaking', (val) => {if (val == 0) this.handleStop(this.current)});
+    }
+    handleStop(current) {
+        this.queue.shift();
+        this.playNext();
+    }
+    add(element) {
+        this.queue.push(element);
+        if (this.queue.length == 1) this.playNext();
+    }
+}