VentureChat 1.19 workaround

VentureChatWorkaround.java

package com.loohp.venturechatworkaround;

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.PacketAdapter.AdapterParameteters;
import com.comphenix.protocol.events.PacketContainer;
import com.comphenix.protocol.events.PacketEvent;
import com.google.gson.Gson;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;
import com.google.gson.JsonParser;
import net.md_5.bungee.api.ChatColor;
import org.bukkit.plugin.java.JavaPlugin;

import java.util.Iterator;
import java.util.Map.Entry;

public class VentureChatWorkaround extends JavaPlugin {

    @Override
    public void onEnable() {
        ProtocolLibrary.getProtocolManager().addPacketListener(new PacketAdapter(new AdapterParameteters().plugin(this).listenerPriority(ListenerPriority.LOWEST).optionAsync().types(PacketType.Play.Server.SYSTEM_CHAT)) {
            @Override
            public void onPacketSending(PacketEvent event) {
                PacketContainer packet = event.getPacket();
                String json = packet.getStrings().read(0);
                if (json == null) {
                    return;
                }
                JsonElement root = JsonParser.parseString(json);
                filterInvalidEvents(root);
                String result = new Gson().toJson(root);
                packet.getStrings().write(0, result);
            }
        });
        getServer().getConsoleSender().sendMessage(ChatColor.GREEN + "VentureChatWorkaround has been enabled!");
    }

    @Override
    public void onDisable() {
        getServer().getConsoleSender().sendMessage(ChatColor.RED + "VentureChatWorkaround had been disabled!");
    }

    public void filterInvalidEvents(JsonElement jsonElement) {
        if (jsonElement.isJsonObject()) {
            JsonObject jsonObject = jsonElement.getAsJsonObject();
            Iterator<Entry<String, JsonElement>> itr = jsonObject.entrySet().iterator();
            while (itr.hasNext()) {
                Entry<String, JsonElement> entry = itr.next();
                String key = entry.getKey();
                JsonElement value = entry.getValue();
                if (key.equals("clickEvent")) {
                    JsonObject clickEvent = value.getAsJsonObject();
                    if (clickEvent.get("action").getAsString().equals("")) {
                        itr.remove();
                    }
                } else if (key.equals("hoverEvent")) {
                    JsonObject hoverEvent = value.getAsJsonObject();
                    if (hoverEvent.get("action").getAsString().equals("")) {
                        itr.remove();
                    }
                } else {
                    filterInvalidEvents(value);
                }
            }
        } else if (jsonElement.isJsonArray()) {
            for (JsonElement element : jsonElement.getAsJsonArray()) {
                filterInvalidEvents(element);
            }
        }
    }

}