Async Enumeration Chunk

<?php

namespace test;


use pocketmine\Server;
use pocketmine\scheduler\AsyncTask;


class TestAsyncTask extends AsyncTask {

    public $levelPath;

    public $pos1;
    public $pos2;

    /**
     * @param string  $levelPath  Путь к миру, пример /root/worlds/MyWorld
     * @param Vector2 $pos1       позиция чанка
     * @param Vector2 $pos2       позиция чанка
     */
    public function __construct($levelPath, $pos1, $pos2) {
        $this->levelPath = $levelPath;
        $this->pos1 = $pos1;
        $this->pos2 = $pos2;
    }


    public function getChunk($chunkX, $chunkY) {
        $region = new RegionLoader($this->levelPath, $chunkX >> 5, $chunkY >> 5);
        return $region->readChunk($chunkX - ($chunkX >> 5) * 32, $chunkY - ($chunkY >> 5) * 32);
    }


    public function countBlock($chunk) {
        for ($x = 0; $x < 16; $x++) {
            for ($z = 0; $z < 16; $z++) {
                for ($y = 0; $y < 256; $y++) {
                    # code...
                }
            }
        }
    }


    public function onRun(){
        $pos1 = $this->pos1;
        $pos2 = $this->pos2;
        if ($pos1->x < $pos2->x) {
            $minX = $pos1->x;
            $maxX = $pos2->x;
        }else {
            $minX = $pos2->x;
            $maxX = $pos1->x;
        }
        if ($pos1->y < $pos2->y) {
            $minY = $pos1->y;
            $maxY = $pos2->y;
        }else {
            $minY = $pos2->y;
            $maxY = $pos1->y;
        }
        for ($chunkX = $minX; $chunkX <= $maxX; $chunkX++) {
            for ($chunkY = $minY; $chunkY <= $maxY; $chunkY ++) {
                $chunk = $this->getChunk($chunkX, $chunkY);
                $this->countBlock($chunk);
            }
        }
    }


    public function onCompletion(Server $server){
        # code...
    }
}