package net.glowstone.net.handler.play.player;
import com.flowpowered.network.MessageHandler;
import net.glowstone.EventFactory;
import net.glowstone.GlowServer;
import net.glowstone.entity.GlowPlayer;
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.Material;
import org.bukkit.Statistic;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.event.player.PlayerTeleportEvent.TeleportCause;
import org.bukkit.inventory.ItemStack;
import org.bukkit.util.NumberConversions;
import org.bukkit.util.Vector;
import java.util.Objects;
public final class PlayerUpdateHandler implements MessageHandler<GlowSession, PlayerUpdateMessage> {
@Override
public void handle(GlowSession session, PlayerUpdateMessage message) {
GlowPlayer player = session.getPlayer();
Location oldLocation = player.getLocation();
Location newLocation = oldLocation.clone();
message.update(newLocation);
// don't let players reach an illegal position
if (Math.abs(newLocation.getBlockX()) > 32000000 || Math.abs(newLocation.getBlockZ()) > 32000000) {
session.getPlayer().kickPlayer("Illegal position");
return;
}
/*
don't let players move more than 100 blocks in a single packet
if they move greater than 10 blocks, but less than 100, just warn
this is NOT robust hack prevention - only to prevent client
confusion about where its actual location is (e.g. during login)
*/
if (message.moved() && !player.isDead()) {
if (player.teleportedTo != null) {
if (newLocation.equals(player.teleportedTo)) {
player.endTeleport();
return;
} else {
return; // outdated location, so skip packet
}
} else {
double distance = newLocation.distanceSquared(oldLocation);
if (distance > 100 * 100) {
session.getPlayer().kickPlayer("You moved too quickly :( (Hacking?)");
return;
} else if (distance > 100) {
GlowServer.logger.warning(session.getPlayer().getName() + " moved too quickly!");
}
}
}
// call move event if movement actually occurred and there are handlers registered
if (!oldLocation.equals(newLocation) && PlayerMoveEvent.getHandlerList().getRegisteredListeners().length > 0) {
PlayerMoveEvent event = EventFactory.callEvent(new PlayerMoveEvent(player, 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
player.teleport(event.getTo(), TeleportCause.PLUGIN);
return;
}
if (!Objects.equals(session.getPlayer().getLocation(), oldLocation)) {
// plugin changed location on move event
return;
}
}
// move event was not fired or did nothing, simply update location
player.setRawLocation(newLocation);
// do stuff with onGround if we need to
if (player.isOnGround() != message.isOnGround()) {
if (message.isOnGround() && player.getVelocity().getY() > 0) {
// jump
if (player.isSprinting()) {
player.addExhaustion(0.2f);
} else {
player.addExhaustion(0.05f);
}
}
player.setOnGround(message.isOnGround());
}
// Checks if the player is still wearing the Elytra
ItemStack chestplate = player.getInventory().getChestplate();
boolean hasElytra = chestplate != null && chestplate.getType() == Material.ELYTRA && chestplate.getDurability() < chestplate.getType().getMaxDurability();
if (player.isGliding() && (player.isOnGround() || !hasElytra)) {
player.setGliding(false);
}
player.addMoveExhaustion(newLocation);
// track movement stats
Vector delta = newLocation.clone().subtract(oldLocation).toVector();
delta.setX(Math.abs(delta.getX()));
delta.setY(Math.abs(delta.getY()));
delta.setZ(Math.abs(delta.getZ()));
int flatDistance = (int) Math.round(Math.sqrt(NumberConversions.square(delta.getX()) + NumberConversions.square(delta.getZ())) * 100.0);
if (message.isOnGround()) {
if (flatDistance > 0) {
if (player.isSprinting()) {
player.incrementStatistic(Statistic.SPRINT_ONE_CM, flatDistance);
} else if (player.isSneaking()) {
player.incrementStatistic(Statistic.CROUCH_ONE_CM, flatDistance);
} else {
player.incrementStatistic(Statistic.WALK_ONE_CM, flatDistance);
}
}
} else if (player.isFlying()) {
if (flatDistance > 0) {
player.incrementStatistic(Statistic.FLY_ONE_CM, flatDistance);
}
} else if (player.isInWater()) {
if (flatDistance > 0) {
player.incrementStatistic(Statistic.SWIM_ONE_CM, flatDistance);
}
}
}
}