Suppress pressure plate sounds.

PressurePlate.java

package com.comphenix.example;

import java.util.logging.Filter;
import java.util.logging.LogRecord;

import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.event.Listener;

import com.comphenix.protocol.Packets;
import com.comphenix.protocol.ProtocolLibrary;
import com.comphenix.protocol.events.ConnectionSide;
import com.comphenix.protocol.events.PacketAdapter;
import com.comphenix.protocol.events.PacketEvent;

public class PressurePlate extends JavaPlugin implements Listener {    
    @Override
    public void onEnable() {
        ProtocolLibrary.getProtocolManager().addPacketListener(new PacketAdapter(this, ConnectionSide.SERVER_SIDE, Packets.Server.NAMED_SOUND_EFFECT) {
            @Override
            public void onPacketSending(PacketEvent event) {
                // Add AbstractPacket and Packet3ENamedSoundEffect from PacketWrapper for this to work
                Packet3ENamedSoundEffect packet = new Packet3ENamedSoundEffect(event.getPacket());
                World world = event.getPlayer().getWorld();
                
                // Look in BlockBasePressurePlate for these constants
                int x = (int) Math.round(packet.getEffectPositionX() - 0.5);
                int y = (int) Math.round(packet.getEffectPositionY() - 0.1);
                int z = (int) Math.round(packet.getEffectPositionZ() - 0.5);
                int blockId = world.getBlockTypeIdAt(x, y, z);
                
                if (isPressurePlate(blockId)) {
                    if ("random.click".equals(packet.getSoundName())) {
                        event.setCancelled(true);
                    }
                }
            }
        });
    }
    
    private boolean isPressurePlate(int id) {
        return id == Material.STONE_PLATE.getId() || 
               id == Material.WOOD_PLATE.getId() || 
               id == Material.GOLD_PLATE.getId() || 
               id == Material.IRON_PLATE.getId();
    }
}