Recording command

package net.unidentifiedgaming.discord.bot.commands;

import org.apache.commons.lang3.ArrayUtils;
import org.tritonus.share.sampled.file.AudioOutputStream;
import sx.blah.discord.api.internal.OpusUtil;
import sx.blah.discord.handle.audio.AudioEncodingType;
import sx.blah.discord.handle.audio.IAudioReceiver;
import sx.blah.discord.handle.impl.events.guild.channel.message.MessageEvent;
import sx.blah.discord.handle.obj.IRole;
import sx.blah.discord.handle.obj.IUser;
import sx.blah.discord.handle.obj.IVoiceChannel;

import javax.sound.sampled.*;
import java.io.*;
import java.util.Arrays;
import java.util.Date;
import java.util.List;

public class RecordingCommand extends Command implements IAudioReceiver {
    private static boolean recording = false;
    private byte[] currentRecording;

    public RecordingCommand(List<IRole> permissions, String helpText) {
        super(permissions, helpText);
    }

    @Override
    public boolean action(List<String> args, MessageEvent event) {
        String arg1 = args.remove(0);
        if (arg1.equals("start")) {
            if (recording) {
                helpText = "I'm already recording in " + event.getClient().getOurUser().getVoiceStateForGuild(event.getGuild()).getChannel().getName() + ".";
                return false;
            }
            IVoiceChannel userVoiceChannel = event.getAuthor().getVoiceStateForGuild(event.getGuild()).getChannel();
            if (userVoiceChannel == null) {
                helpText = "You need to be in a voice channel to do that.";
                return false;
            }

            event.getClient().changePlayingText("Recording!");
            recording = true;

            event.getGuild().getAudioManager().subscribeReceiver(this);
            userVoiceChannel.join();
            currentRecording = null;

            event.getMessage().reply("I have started recording!");
            return true;
        } else if (arg1.equals("stop")) {
            if (!recording) {
                helpText = "I'm not recording!";
                return false;
            }

            writeToFile();

            event.getGuild().getAudioManager().unsubscribeReceiver(this);
            event.getClient().changePlayingText("");
            event.getClient().getOurUser().getVoiceStateForGuild(event.getGuild()).getChannel().leave();
            recording = false;
            currentRecording = null;
            event.getMessage().reply("I have stopped recording!");
            return true;
        }

        return false;
    }

    private void writeToFile() {
        InputStream b_stream = new ByteArrayInputStream(currentRecording);
        System.out.println(Arrays.toString(currentRecording));
        try {
            AudioFormat format = new AudioFormat(8000f, 16, 1, true, true);
            AudioInputStream stream = new AudioInputStream(b_stream, format, currentRecording.length);
            File file = new File("D:/DiscordBot/recordings/meetings/" + new Date().getTime() + ".wav");
            file.getParentFile().mkdirs();
            AudioSystem.write(stream, AudioFileFormat.Type.WAVE, file);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    @Override
    public void receive(byte[] audio, IUser iUser, char sequence, int timestamp) {
//        System.out.println("audio: " + Arrays.toString(audio));
//        System.out.println("currentRecording: " + Arrays.toString(currentRecording));
        currentRecording = ArrayUtils.addAll(currentRecording, audio);
    }

    @Override
    public AudioEncodingType getAudioEncodingType() {
        return AudioEncodingType.OPUS;
    }
}