Halloween2024/src/main/java/com/alttd/halloween/leaderboard/HoverText.java

package com.alttd.halloween.leaderboard;

import com.comphenix.protocol.PacketType;
import com.comphenix.protocol.ProtocolManager;
import com.comphenix.protocol.events.PacketContainer;
import com.comphenix.protocol.reflect.FieldAccessException;
import com.comphenix.protocol.utility.MinecraftReflection;
import com.comphenix.protocol.wrappers.WrappedChatComponent;
import com.comphenix.protocol.wrappers.WrappedDataWatcher;
import lombok.extern.slf4j.Slf4j;
import org.bukkit.Location;

import java.util.List;
import java.util.Optional;
import java.util.UUID;

@Slf4j
public class HoverText {

    private final ProtocolManager protocolManager;

    public HoverText(ProtocolManager protocolManager) {
        this.protocolManager = protocolManager;
    }

    public Optional<PacketContainer> setLine(LeaderboardLineEntity entity, String text) {
        return setLine(entity.entityId(), text);
    }

    public Optional<LeaderboardLineEntity> createLeaderboardLineEntity(Location location) {
        try {
            PacketContainer spawnPacket = protocolManager.createPacket(PacketType.Play.Server.SPAWN_ENTITY);
            int entityId = (int) (Math.random() * Integer.MAX_VALUE);

            spawnPacket.getModifier().writeDefaults();
            spawnPacket.getIntegers().write(0, entityId);
            spawnPacket.getUUIDs().write(0, UUID.randomUUID());
            spawnPacket.getDoubles()
                    .write(0, location.getX())
                    .write(1, location.getY())
                    .write(2, location.getZ());
            spawnPacket.getIntegers().write(1, 78); // Armor Stand type
            PacketContainer destroyPacket = protocolManager.createPacket(PacketType.Play.Server.ENTITY_DESTROY);
            destroyPacket.getIntLists().write(0, List.of(entityId));
            return Optional.of(new LeaderboardLineEntity(entityId, spawnPacket, destroyPacket));
        } catch (Exception e) {
            log.error("Failed to create hover text entity", e);
        }
        return Optional.empty();
    }

    public Optional<PacketContainer> setLine(int entityId, String text) {
        try {
            PacketContainer metaPacket = protocolManager.createPacket(PacketType.Play.Server.ENTITY_METADATA);
            metaPacket.getIntegers().write(0, entityId);
            WrappedDataWatcher watcher = new WrappedDataWatcher();

            WrappedDataWatcher.Serializer serializer = WrappedDataWatcher.Registry.get(MinecraftReflection.getIChatBaseComponentClass());
            WrappedDataWatcher.WrappedDataWatcherObject displayName = new WrappedDataWatcher.WrappedDataWatcherObject(2, serializer);
            WrappedChatComponent component = WrappedChatComponent.fromText(text);

            watcher.setObject(displayName, Optional.of(component.getHandle()));
            watcher.setObject(new WrappedDataWatcher.WrappedDataWatcherObject(3, WrappedDataWatcher.Registry.get(Boolean.class)), true);  // Custom Name Visible
            watcher.setObject(new WrappedDataWatcher.WrappedDataWatcherObject(0, WrappedDataWatcher.Registry.get(Byte.class)), (byte) 0x20);  // Invisible

            metaPacket.getWatchableCollectionModifier().write(0, watcher.getWatchableObjects());
            return Optional.of(metaPacket);
        } catch (FieldAccessException e) {
            log.error("Failed to edit line on hover text", e);
        }
        return Optional.empty();
    }

}