/*
* Copyright (c) 2017 Frederik Ar. Mikkelsen & NoobLance
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package lavalink.client.player;
import com.sedmelluq.discord.lavaplayer.track.AudioTrack;
import lavalink.client.LavalinkUtil;
import lavalink.client.io.LavalinkSocket;
import lavalink.client.io.Link;
import lavalink.client.player.event.IPlayerEventListener;
import lavalink.client.player.event.PlayerEvent;
import lavalink.client.player.event.PlayerPauseEvent;
import lavalink.client.player.event.PlayerResumeEvent;
import lavalink.client.player.event.TrackStartEvent;
import org.json.JSONObject;
import java.io.IOException;
import java.util.List;
import java.util.concurrent.CopyOnWriteArrayList;
public class LavalinkPlayer implements IPlayer {
private AudioTrack track = null;
private boolean paused = false;
private int volume = 100;
private long updateTime = -1;
private long position = -1;
private final Link link;
private List<IPlayerEventListener> listeners = new CopyOnWriteArrayList<>();
/**
* Constructor only for internal use
*
* @param link the parent link
*/
public LavalinkPlayer(Link link) {
this.link = link;
addListener(new LavalinkInternalPlayerEventHandler());
}
/**
* Invoked by {@link Link} to make sure we keep playing music on the new node
* <p>
* Used when we are moved to a new socket
*/
public void onNodeChange() {
AudioTrack track = getPlayingTrack();
if (track != null) {
track.setPosition(getTrackPosition());
playTrack(track);
}
}
@Override
public AudioTrack getPlayingTrack() {
return track;
}
@Override
public void playTrack(AudioTrack track) {
try {
position = track.getPosition();
TrackData trackData = track.getUserData(TrackData.class);
JSONObject json = new JSONObject();
json.put("op", "play");
json.put("guildId", link.getGuildId());
json.put("track", LavalinkUtil.toMessage(track));
json.put("startTime", position);
if (trackData != null) {
json.put("startTime", trackData.startPos);
json.put("endTime", trackData.endPos);
}
json.put("pause", paused);
json.put("volume", volume);
//noinspection ConstantConditions
link.getNode(true).send(json.toString());
updateTime = System.currentTimeMillis();
this.track = track;
emitEvent(new TrackStartEvent(this, track));
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
public void stopTrack() {
track = null;
LavalinkSocket node = link.getNode(false);
if (node == null) return;
JSONObject json = new JSONObject();
json.put("op", "stop");
json.put("guildId", link.getGuildId());
node.send(json.toString());
}
@Override
public void setPaused(boolean pause) {
if (pause == paused) return;
LavalinkSocket node = link.getNode(false);
if (node != null) {
JSONObject json = new JSONObject();
json.put("op", "pause");
json.put("guildId", link.getGuildId());
json.put("pause", pause);
node.send(json.toString());
}
paused = pause;
if (pause) {
emitEvent(new PlayerPauseEvent(this));
} else {
emitEvent(new PlayerResumeEvent(this));
}
}
@Override
public boolean isPaused() {
return paused;
}
@Override
public long getTrackPosition() {
if (getPlayingTrack() == null) throw new IllegalStateException("Not currently playing anything");
if (!paused) {
// Account for the time since our last update
long timeDiff = System.currentTimeMillis() - updateTime;
return Math.min(position + timeDiff, track.getDuration());
} else {
return Math.min(position, track.getDuration());
}
}
@Override
public void seekTo(long position) {
if (getPlayingTrack() == null) throw new IllegalStateException("Not currently playing anything");
if (!getPlayingTrack().isSeekable()) throw new IllegalStateException("Track cannot be seeked");
JSONObject json = new JSONObject();
json.put("op", "seek");
json.put("guildId", link.getGuildId());
json.put("position", position);
//noinspection ConstantConditions
link.getNode(true).send(json.toString());
}
@Override
public void setVolume(int volume) {
volume = Math.min(1000, Math.max(0, volume)); // Lavaplayer bounds
this.volume = volume;
LavalinkSocket node = link.getNode(false);
if (node == null) return;
JSONObject json = new JSONObject();
json.put("op", "volume");
json.put("guildId", link.getGuildId());
json.put("volume", volume);
node.send(json.toString());
}
@Override
public int getVolume() {
return volume;
}
public void provideState(JSONObject json) {
updateTime = json.getLong("time");
position = json.optLong("position", 0);
}
@Override
public void addListener(IPlayerEventListener listener) {
listeners.add(listener);
}
@Override
public void removeListener(IPlayerEventListener listener) {
listeners.remove(listener);
}
public void emitEvent(PlayerEvent event) {
listeners.forEach(listener -> listener.onEvent(event));
}
void clearTrack() {
track = null;
}
@SuppressWarnings("WeakerAccess")
public Link getLink() {
return link;
}
}
