IronDoorOpener.java

package com.colt.irondooropener;

import com.sk89q.worldguard.bukkit.WorldGuardPlugin;
import com.sk89q.worldguard.protection.ApplicableRegionSet;
import com.sk89q.worldguard.protection.flags.DefaultFlag;
import org.bukkit.Bukkit;
import org.bukkit.Effect;
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.block.BlockFace;
import org.bukkit.entity.Player;
import org.bukkit.event.Event;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;

import java.util.logging.Level;

public class IronDoorOpener extends JavaPlugin implements Listener {

    public void onEnable() {
        Bukkit.getPluginManager().registerEvents(this, this);
    }

    private WorldGuardPlugin getWorldGuard() {
        Plugin plugin = getServer().getPluginManager().getPlugin("WorldGuard");

        // WorldGuard may not be loaded
        if (plugin == null || !(plugin instanceof WorldGuardPlugin)) {
            return null; // Maybe you want throw an exception instead
        }

        return (WorldGuardPlugin) plugin;
    }

    @EventHandler
    public void onPlayerInteract(PlayerInteractEvent event) {
        Block eventBlock = event.getClickedBlock();
        if(event.getPlayer().hasPermission("irondoor.open") &&
                event.getAction() == Action.RIGHT_CLICK_BLOCK &&
                event.useInteractedBlock() == Event.Result.ALLOW &&
                canUseBlock(event.getPlayer(), eventBlock)) {
            if (eventBlock.getType() == Material.IRON_DOOR_BLOCK) {
                if (eventBlock.getData() >= 8) {
                    eventBlock = eventBlock.getRelative(BlockFace.DOWN);
                }
                if (eventBlock.getType() == Material.IRON_DOOR_BLOCK) {
                    if (eventBlock.getData() < 4) {
                        eventBlock.setData((byte) (eventBlock.getData() + 4));
                        eventBlock.getWorld().playEffect(eventBlock.getLocation(), Effect.DOOR_TOGGLE, 0);
                    } else {
                        eventBlock.setData((byte) (eventBlock.getData() - 4));
                        eventBlock.getWorld().playEffect(eventBlock.getLocation(), Effect.DOOR_TOGGLE, 0);
                    }
                }
                event.setUseItemInHand(Event.Result.DENY);
            }
        }
    }

    public boolean canUseBlock(Player player, Block block) {
        return getWorldGuard().canBuild(player, block);
    }
}