FoliaFlow/src/main/java/xyz/hynse/bbsdfia/Bbsdfia.java

package xyz.hynse.bbsdfia;

import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.World;
import org.bukkit.block.Block;
import org.bukkit.entity.Entity;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.FallingBlock;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.BlockBreakEvent;
import org.bukkit.event.entity.EntityChangeBlockEvent;
import org.bukkit.plugin.java.JavaPlugin;
import org.bukkit.util.Vector;

public class Bbsdfia extends JavaPlugin implements Listener {
    private static final Material[] BLOCK_TYPES = {
            Material.BLACK_CONCRETE_POWDER,
            Material.BLUE_CONCRETE_POWDER,
            Material.BROWN_CONCRETE_POWDER,
            Material.CYAN_CONCRETE_POWDER,
            Material.GRAY_CONCRETE_POWDER,
            Material.GREEN_CONCRETE_POWDER,
            Material.LIGHT_BLUE_CONCRETE_POWDER,
            Material.LIGHT_GRAY_CONCRETE_POWDER,
            Material.LIME_CONCRETE_POWDER,
            Material.MAGENTA_CONCRETE_POWDER,
            Material.ORANGE_CONCRETE_POWDER,
            Material.PINK_CONCRETE_POWDER,
            Material.PURPLE_CONCRETE_POWDER,
            Material.RED_CONCRETE_POWDER,
            Material.WHITE_CONCRETE_POWDER,
            Material.YELLOW_CONCRETE_POWDER,
            Material.DRAGON_EGG,
            Material.GRAVEL,
            Material.RED_SAND,
            Material.SAND
    };

    private static final Vector VELOCITY_SOUTH = new Vector(0, 1, -2);
    private static final Vector VELOCITY_EAST = new Vector(2, 1, 0);
    private static final Vector VELOCITY_NORTH = new Vector(0, 1, 2);
    private static final Vector VELOCITY_WEST = new Vector(0, 1, 2);

    private static final Location START_LOCATION = new Location(Bukkit.getWorld("world_the_end"), 101, 49, 1);
    private static final Location END_LOCATION = new Location(Bukkit.getWorld("world_the_end"), 99, 51, -1);
    @Override
    public void onEnable() {
        super.onEnable();
        getServer().getPluginManager().registerEvents(this, this);
        getServer().getLogger().info("Bbsdfia plugin started");
    }

    @Override
    public void onDisable() {
        super.onDisable();
        getServer().getLogger().info("Bbsdfia plugin stopped");
    }

    @EventHandler
    public void onFallingBlockToBlock(EntityChangeBlockEvent e){
        if(e.getEntityType() == EntityType.FALLING_BLOCK){
            Entity entity = e.getEntity();
            Location loc = entity.getLocation();
            Vector vel = entity.getVelocity();
            Block movingTo = getBlockMovingTo(loc, vel);

            if(movingTo != null && movingTo.getType() == Material.END_PORTAL){
                Location spawnLoc = movingTo.getLocation();
                spawnLoc.setX(spawnLoc.getX()+0.5);
                spawnLoc.setY(spawnLoc.getY()+0.5);
                spawnLoc.setZ(spawnLoc.getZ()+0.5);

                FallingBlock dummy = loc.getWorld().spawnFallingBlock(spawnLoc, ((FallingBlock) entity).getBlockData());
                Vector dummyVel = vel.clone();
                dummyVel.setY(-dummyVel.getY());
                dummyVel.multiply(new Vector(2, 2, 2));

                dummyVel.add(new Vector(0, -0.2, 0));

                dummy.setVelocity(dummyVel);
            }
        }
    }
    @EventHandler
    public void onBlockBreak(BlockBreakEvent event) {
        Block block = event.getBlock();
        if (isTargetBlock(block.getType())) {
            World world = block.getWorld();
            FallingBlock fallingBlock = world.spawnFallingBlock(block.getLocation(), block.getBlockData());
            Vector velocity = getVelocity(block.getLocation());
            fallingBlock.setVelocity(velocity);
            block.setType(Material.AIR);
        }
    }

    private boolean isTargetBlock(Material material) {
        for (Material blockType : BLOCK_TYPES) {
            if (blockType == material) {
                return true;
            }
        }
        return false;
    }

    private Vector getVelocity(Location location) {
        Vector velocity = null;
        if (location.getBlockX() == START_LOCATION.getBlockX()) {
            velocity = VELOCITY_EAST;
        } else if (location.getBlockZ() == END_LOCATION.getBlockZ()) {
            velocity = VELOCITY_SOUTH;
        } else if (location.getBlockX() == END_LOCATION.getBlockX()) {
            velocity = VELOCITY_NORTH;
        } else if (location.getBlockX() == END_LOCATION.getBlockX()) {
            velocity = VELOCITY_WEST;
        }
        return velocity;
    }



    Block getBlockMovingTo(Location loc, Vector vel){
        double absMax = 0, max = 0;
        char dir = ' ';
        Block relative = null;
        if(Math.abs(vel.getX()) > absMax){
            max = vel.getX();
            absMax = Math.abs(vel.getX());
            dir = 'x';
        }
        if(Math.abs(vel.getY()) > absMax){
            max = vel.getY();
            absMax = Math.abs(vel.getY());
            dir = 'y';
        }
        if(Math.abs(vel.getZ()) > absMax){
            max = vel.getZ();
            dir = 'z';
        }
        switch (dir) {
            case 'x' -> relative = loc.getBlock().getRelative((int) Math.signum(max), 0, 0);
            case 'y' -> relative = loc.getBlock().getRelative(0, (int) Math.signum(max), 0);
            case 'z' -> relative = loc.getBlock().getRelative(0, 0, (int) Math.signum(max));
        }
        return relative;
    }
}