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BukkitProtocolLibLockedPacketListener.java
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BukkitProtocolLibLockedPacketListener.java
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/*
* This file is part of HuskSync, licensed under the Apache License 2.0.
*
* Copyright (c) William278 <[email protected]>
* Copyright (c) contributors
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.william278.husksync.listener;
import com.comphenix.protocol.PacketType;
import com.comphenix.protocol.ProtocolLibrary;
import com.comphenix.protocol.events.ListenerPriority;
import com.comphenix.protocol.events.PacketAdapter;
import com.comphenix.protocol.events.PacketEvent;
import com.google.common.collect.Sets;
import net.william278.husksync.BukkitHuskSync;
import org.jetbrains.annotations.NotNull;
import java.util.Set;
import java.util.logging.Level;
import java.util.stream.Collectors;
import static com.comphenix.protocol.PacketType.Play.Client;
public class BukkitProtocolLibLockedPacketListener extends BukkitLockedEventListener implements LockedHandler {
protected BukkitProtocolLibLockedPacketListener(@NotNull BukkitHuskSync plugin) {
super(plugin);
}
@Override
public void onEnable() {
super.onEnable();
ProtocolLibrary.getProtocolManager().addPacketListener(new PlayerPacketAdapter(this));
plugin.log(Level.INFO, "Using ProtocolLib to cancel packets for locked players");
}
private static class PlayerPacketAdapter extends PacketAdapter {
// Packets we want the player to still be able to send/receiver to/from the server
private static final Set<PacketType> ALLOWED_PACKETS = Set.of(
Client.KEEP_ALIVE, Client.PONG, Client.CUSTOM_PAYLOAD, // Connection packets
Client.CHAT_COMMAND, Client.CLIENT_COMMAND, Client.CHAT, Client.CHAT_SESSION_UPDATE, // Chat / command packets
Client.POSITION, Client.POSITION_LOOK, Client.LOOK, // Movement packets
Client.HELD_ITEM_SLOT, Client.ARM_ANIMATION, Client.TELEPORT_ACCEPT, // Animation packets
Client.SETTINGS // Video setting packets
);
private final BukkitProtocolLibLockedPacketListener listener;
public PlayerPacketAdapter(@NotNull BukkitProtocolLibLockedPacketListener listener) {
super(listener.getPlugin(), ListenerPriority.HIGHEST, getPacketsToListenFor());
this.listener = listener;
}
@Override
public void onPacketReceiving(@NotNull PacketEvent event) {
if (listener.cancelPlayerEvent(event.getPlayer().getUniqueId()) && !event.isReadOnly()) {
event.setCancelled(true);
}
}
@Override
public void onPacketSending(@NotNull PacketEvent event) {
if (listener.cancelPlayerEvent(event.getPlayer().getUniqueId()) && !event.isReadOnly()) {
event.setCancelled(true);
}
}
// Returns the set of ALL Server packets, excluding the set of allowed packets
@NotNull
private static Set<PacketType> getPacketsToListenFor() {
return Sets.difference(
Client.getInstance().values().stream().filter(PacketType::isSupported).collect(Collectors.toSet()),
ALLOWED_PACKETS
);
}
}
}