Add auto disconnect

src/events/voice-state-update.ts

@@ -0,0 +1,17 @@
+import {VoiceState} from 'discord.js';
+import container from '../inversify.config';
+import {TYPES} from '../types';
+import PlayerManager from '../managers/player';
+import {getSizeWithoutBots} from '../utils/channels';
+
+export default (oldState: VoiceState, _: VoiceState): void => {
+  const playerManager = container.get<PlayerManager>(TYPES.Managers.Player);
+
+  const player = playerManager.get(oldState.guild.id);
+
+  if (player.voiceConnection) {
+    if (getSizeWithoutBots(player.voiceConnection.channel) === 0) {
+      player.disconnect();
+    }
+  }
+};