package net.glowstone.net.handler.play.player;
import com.flowpowered.networking.MessageHandler;
import net.glowstone.EventFactory;
import net.glowstone.net.GlowSession;
import net.glowstone.net.message.play.game.PositionRotationMessage;
import net.glowstone.net.message.play.player.PlayerUpdateMessage;
import org.bukkit.Location;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.event.player.PlayerTeleportEvent;
public final class PlayerUpdateHandler implements MessageHandler<GlowSession, PlayerUpdateMessage> {
@Override
public void handle(GlowSession session, PlayerUpdateMessage message) {
Location oldLocation = session.getPlayer().getLocation();
Location newLocation = oldLocation.clone();
message.update(newLocation);
// don't let players move more than 16 blocks in a single packet.
// this is NOT robust hack prevention - only to prevent client
// confusion about where its actual location is (e.g. during login)
if (newLocation.distanceSquared(oldLocation) > 16 * 16) {
return;
}
// call move event if movement actually occurred and there are handlers registered
if (!oldLocation.equals(newLocation) && PlayerMoveEvent.getHandlerList().getRegisteredListeners().length > 0) {
final PlayerMoveEvent event = EventFactory.callEvent(new PlayerMoveEvent(session.getPlayer(), oldLocation, newLocation));
if (event.isCancelled()) {
// tell client they're back where they started
session.send(new PositionRotationMessage(oldLocation));
return;
}
if (!event.getTo().equals(newLocation)) {
// teleport to the set destination: fires PlayerTeleportEvent and
// handles if the destination is in another world
session.getPlayer().teleport(event.getTo(), PlayerTeleportEvent.TeleportCause.PLUGIN);
return;
}
}
// move event was not fired or did nothing, simply update location
session.getPlayer().setRawLocation(newLocation);
}
}