HubSigns.java

import net.menoni.rd.RuntimeDebugger;
import net.menoni.rd.model.Debugger;
import org.bukkit.ChatColor;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.block.Block;
import org.bukkit.block.BlockFace;
import org.bukkit.block.Sign;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.player.PlayerMoveEvent;
import org.bukkit.event.player.PlayerTeleportEvent;
import org.bukkit.potion.PotionEffect;
import org.bukkit.potion.PotionEffectType;
import org.bukkit.util.Vector;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Pattern;

public class HubSigns implements Debugger, Debugger.Stoppable, Listener {

	private static List<Material> signMaterials;
	static {
		signMaterials = new ArrayList<>();
		Pattern signPattern = Pattern.compile(".*SIGN.*");
		for (Material value : Material.values()) {
			if (signPattern.matcher(value.name()).matches()) {
				signMaterials.add(value);
			}
		}
	}

	@SuppressWarnings("deprecation")
	@EventHandler
	public void onPlayerMove(PlayerMoveEvent e) {
		Player player = e.getPlayer();

		if (e.getTo() == null) {
			return;
		}

		if (e.getFrom().getBlockX() != e.getTo().getBlockX() || e.getFrom().getBlockY() != e.getFrom().getBlockY() || e.getFrom().getBlockZ() != e.getTo().getBlockZ()) {
			Block block = e.getTo().getBlock();
			boolean shouldCancel = false;

			for (Block min : getRelative(block)) {
				if (min.getType() == Material.SPONGE) {
					shouldCancel = true;
					break;
				} else if (signMaterials.contains(min.getType())) {
					Sign sign = (Sign) min.getState();
					String first = ChatColor.stripColor(sign.getLine(0)).toLowerCase();

					if (first.equalsIgnoreCase("[jump]")) {
						doVelocity(player, sign);
					} else if (first.equalsIgnoreCase("[teleport]")) {
						try {
							double x = Double.valueOf(sign.getLine(1));
							double y = Double.valueOf(sign.getLine(2));
							double z = Double.valueOf(sign.getLine(3));

							player.teleport(new Location(player.getWorld(), x, y, z, player.getLocation().getYaw(), player.getLocation().getPitch()), PlayerTeleportEvent.TeleportCause.PLUGIN);
						} catch (NumberFormatException ex) {
						}
					} else if (sign.getLine(0).equalsIgnoreCase("[effect]")) {
						try {
							int id = Integer.valueOf(sign.getLine(1));
							int time = Integer.valueOf(sign.getLine(2));
							int level = Integer.valueOf(sign.getLine(3));

							player.addPotionEffect(new PotionEffect(PotionEffectType.getById(id), time, level, false), true);
						} catch (NumberFormatException ex) {
						}
					}
				}
			}
			if (shouldCancel) {
				Location newLoc = e.getFrom();
				newLoc.setX(newLoc.getBlockX() + 0.5D);
				newLoc.setY(newLoc.getBlockY());
				newLoc.setZ(newLoc.getBlockZ() + 0.5D);

				e.setTo(newLoc);
				e.getPlayer().teleport(newLoc);
			}
		}
	}



	private void doVelocity(Player player, Sign sign) {
		if (!sign.getLine(1).isEmpty() && !sign.getLine(2).isEmpty() && !sign.getLine(3).isEmpty()) {
			// x/y/z -> force full direction
			try {
				double x = Double.parseDouble(sign.getLine(1));
				double y = Double.parseDouble(sign.getLine(2));
				double z = Double.parseDouble(sign.getLine(3));

				player.setVelocity(new Vector(x, y, z));
			} catch(NumberFormatException ex) { }
			return;
		}
		if (!sign.getLine(1).isEmpty() && !sign.getLine(2).isEmpty()) {
			// speed/y -> player direction + y velocity
			double speed = Double.parseDouble(sign.getLine(1));
			double y = Double.parseDouble(sign.getLine(2));
			Vector dir = player.getEyeLocation().getDirection().clone();
			dir.normalize();
			dir.multiply(speed);
			dir.setY(y);
			player.setVelocity(dir);
			return;
		}
		if (!sign.getLine(1).isEmpty()) {
			double speed = Double.parseDouble(sign.getLine(1));
			Vector dir = player.getEyeLocation().getDirection().clone();
			dir.normalize();
			dir.multiply(speed);
			player.setVelocity(dir);
			return;
		}
	}

	private ArrayList<Block> getRelative(Block current) {
		ArrayList<Block> list = new ArrayList<>();

		for(int i = 0; i < 5; i++) {
			list.add(current.getRelative(BlockFace.DOWN, i));
		}

		return list;
	}

	@Override
	public void debug(RuntimeDebugger plugin, CommandSender cs) {

	}

	@Override
	public void stop() {

	}
}