package se.despotify.client.protocol.command.media;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import se.despotify.BrowseType;
import se.despotify.Connection;
import se.despotify.client.protocol.PacketType;
import se.despotify.client.protocol.channel.Channel;
import se.despotify.client.protocol.channel.ChannelCallback;
import se.despotify.client.protocol.command.Command;
import se.despotify.domain.Store;
import se.despotify.domain.media.Result;
import se.despotify.domain.media.Track;
import se.despotify.exceptions.DespotifyException;
import se.despotify.util.GZIP;
import se.despotify.util.Hex;
import se.despotify.util.XML;
import se.despotify.util.XMLElement;
import java.nio.ByteBuffer;
import java.nio.charset.Charset;
import java.util.Arrays;
import java.util.Collection;
import java.util.Date;
/**
* @since 2009-apr-25 16:28:42
*/
public class LoadTracks extends Command<Boolean> {
protected static Logger log = LoggerFactory.getLogger(LoadTracks.class);
private Track[] tracks;
private Store store;
public LoadTracks(Store store, Collection<Track> tracks) {
this(store, tracks.toArray(new Track[tracks.size()]));
}
public LoadTracks(Store store, Track... tracks) {
this.store = store;
this.tracks = tracks;
}
@Override
public Boolean send(Connection connection) throws DespotifyException {
// todo send multiple requests if more than 200 tracks!
if (tracks.length > 240) {
throw new DespotifyException("Can only load up to 240 track at the time.");
}
/* Create channel callback */
ChannelCallback callback = new ChannelCallback();
/* Send browse request. */
/* Create channel and buffer. */
Channel channel = new Channel("Browse-Channel", Channel.Type.TYPE_BROWSE, callback);
ByteBuffer buffer = ByteBuffer.allocate(2 + 1 + tracks.length * 16); //+ ((type == BrowseType.artist || type == BrowseType.album)?4:0));
// if(ids.size() > 1 && type != BrowseType.track){
// throw new IllegalArgumentException("Only BrowserType.track accepts multiple ids.");
// }
/* Append channel id and type. */
buffer.putShort((short) channel.getId());
buffer.put((byte)BrowseType.track.getValue());
/* Append (16 byte) ids. */
for (Track track : tracks) {
buffer.put(Arrays.copyOfRange(track.getByteUUID(), 0, 16));
}
// /* Append zero. */
// if(type == BrowseType.artist || type == BrowseType.album){
// buffer.putInt(0);
// }
buffer.flip();
/* Register channel. */
Channel.register(channel);
/* Send packet. */
connection.getProtocol().sendPacket(PacketType.browse, buffer, "load track");
/* Get data and inflate it. */
byte[] data = GZIP.inflate(callback.getData("gzipped load track response"));
if (log.isInfoEnabled()) {
log.info("load track response, " + data.length + " uncompressed bytes:\n" + Hex.log(data, log));
}
if (data.length == 0) {
throw new DespotifyException("Received an empty response");
}
/* Cut off that last 0xFF byte... */
data = Arrays.copyOfRange(data, 0, data.length - 1);
/* Load XML. */
String xml = new String(data, Charset.forName("UTF-8"));
if (log.isDebugEnabled()) {
log.debug(xml);
}
XMLElement root = XML.load(xml);
// load tracks
Result result = Result.fromXMLElement(root, store);
for (Track track : result.getTracks() ) {
track.setLoaded(new Date());
}
return true;
}
}