HaveASeat

HaveASeat.java

package me.neatmonster.haveaseat;

import java.util.ArrayList;
import java.util.List;

import net.minecraft.server.Packet29DestroyEntity;
import net.minecraft.server.Packet39AttachEntity;

import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.craftbukkit.entity.CraftPlayer;
import org.bukkit.entity.Arrow;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.EventPriority;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.event.entity.EntityDeathEvent;
import org.bukkit.event.entity.EntityExplodeEvent;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.event.player.PlayerTeleportEvent;
import org.bukkit.plugin.java.JavaPlugin;

public class HaveASeat extends JavaPlugin implements Listener {
    class Seat {
        private Arrow  arrow1 = null;
        private Arrow  arrow2 = null;
        private Block  block  = null;
        private Player player = null;

        public Seat(final Player player, final Block block) {
            this.player = player;
            this.block = block;
            create();
        }

        public void create() {
            double x = 0.5, z = 0.5;
            if (block.getType() != Material.STEP && block.getData() == (byte) 0x0)
                x = 0.3;
            else if (block.getType() != Material.STEP && block.getData() == (byte) 0x1)
                x = 0.7;
            else if (block.getType() != Material.STEP && block.getData() == (byte) 0x2)
                z = 0.3;
            else if (block.getType() != Material.STEP && block.getData() == (byte) 0x3)
                z = 0.7;
            arrow1 = block.getWorld().spawn(block.getLocation().clone().add(x, 0.9, z), Arrow.class);
            arrow1.setPassenger(player);
            final Packet29DestroyEntity packet1 = new Packet29DestroyEntity();
            packet1.a = arrow1.getEntityId();
            ((CraftPlayer) player).getHandle().netServerHandler.sendPacket(packet1);
            arrow2 = block.getWorld().spawn(block.getLocation().clone().add(x, -0.1, z), Arrow.class);
            final Packet39AttachEntity packet2 = new Packet39AttachEntity();
            packet2.a = player.getEntityId();
            packet2.b = arrow2.getEntityId();
            ((CraftPlayer) player).getHandle().netServerHandler.sendPacket(packet2);
            HaveASeat.seats.add(this);
        }

        public void destroy() {
            try {
                arrow1.eject();
            } catch (final Exception e) {}
            try {
                arrow1.remove();
            } catch (final Exception e) {}
            try {
                arrow2.remove();
            } catch (final Exception e) {}
            HaveASeat.seats.remove(this);
        }

        public Block getBlock() {
            return block;
        }

        public Player getPlayer() {
            return player;
        }
    }

    private static HaveASeat instance = null;

    public static List<Seat> seats    = new ArrayList<Seat>();

    public static HaveASeat getInstance() {
        return instance;
    }

    private static Seat getSeatByBlock(final Block block) {
        for (final Seat seat : seats)
            if (seat.getBlock().hashCode() == block.hashCode())
                return seat;
        return null;
    }

    private static Seat getSeatByPlayer(final Player player) {
        for (final Seat seat : seats)
            if (seat.getPlayer() == player)
                return seat;
        return null;
    }

    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
    public void onBlockBreak(final BlockBreakEvent event) {
        if (getSeatByBlock(event.getBlock()) != null)
            getSeatByBlock(event.getBlock()).destroy();
    }

    @Override
    public void onDisable() {
        super.onDisable();
        final List<Seat> seats_ = new ArrayList<Seat>();
        seats_.addAll(seats);
        for (final Seat seat : seats_)
            seat.destroy();
    }

    @Override
    public void onEnable() {
        super.onEnable();
        instance = this;
        Bukkit.getScheduler().scheduleSyncRepeatingTask(this, new Runnable() {
            @Override
            public void run() {
                final List<Seat> seats_ = new ArrayList<Seat>();
                seats_.addAll(seats);
                for (final Seat seat : seats_) {
                    seat.destroy();
                    seat.create();
                }
            }
        }, 1100L, 1100L);
        Bukkit.getPluginManager().registerEvents(this, this);
    }

    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
    public void onEntityDeath(final EntityDeathEvent event) {
        if (event.getEntity() instanceof Player && getSeatByPlayer((Player) event.getEntity()) != null)
            getSeatByPlayer((Player) event.getEntity()).destroy();
    }

    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
    public void onEntityExplodeEvent(final EntityExplodeEvent event) {
        for (final Block block : event.blockList())
            if (getSeatByBlock(block) != null)
                getSeatByBlock(block).destroy();
    }

    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
    public void onPlayerInteract(final PlayerInteractEvent event) {
        if (!event.getPlayer().hasPermission("takeaseat.noseat")
                && event.getPlayer().isSneaking()
                && event.getAction() == Action.RIGHT_CLICK_BLOCK
                && (event.getClickedBlock().getType() == Material.WOOD_STAIRS
                        || event.getClickedBlock().getType() == Material.COBBLESTONE_STAIRS
                        || event.getClickedBlock().getType() == Material.STEP)) {
            event.setCancelled(true);
            if (getSeatByPlayer(event.getPlayer()) != null && getSeatByBlock(event.getClickedBlock()) != null)
                getSeatByPlayer(event.getPlayer()).destroy();
            else if (getSeatByPlayer(event.getPlayer()) == null && getSeatByBlock(event.getClickedBlock()) == null
                    && event.getClickedBlock().getLocation().clone().add(0, 1, 0).getBlock().getType() == Material.AIR
                    && event.getClickedBlock().getLocation().clone().add(0, 2, 0).getBlock().getType() == Material.AIR) {
                if (getSeatByPlayer(event.getPlayer()) != null)
                    getSeatByPlayer(event.getPlayer()).destroy();
                new Seat(event.getPlayer(), event.getClickedBlock());
            }
        }
    }

    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
    public void onPlayerQuit(final PlayerQuitEvent event) {
        if (getSeatByPlayer(event.getPlayer()) != null)
            getSeatByPlayer(event.getPlayer()).destroy();
    }

    @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
    public void onPlayerTeleport(final PlayerTeleportEvent event) {
        if (getSeatByPlayer(event.getPlayer()) != null)
            getSeatByPlayer(event.getPlayer()).destroy();
    }
}

plugin.yml

name: HaveASeat
version: 1.0
description: Seats in Minecraft!
author: NeatMonster
website: http://spacebukkit.xereo.net/
main: me.neatmonster.haveaseat.HaveASeat
database: false