Laravel 5.5 Storage chain call add dir file filter class

i'am not very well OO, and search a few web site to write this class

now my problem is how to use this class just like the Laravel 5.5 build in Storage class

i want use like this

MyStorage::disk('dropbox')
    ->addDirFilter('(school|travel)')
    ->addDirFilter('\d{4}-\d{2}-\d{2}')
    ->addFileFilter('.*\.jpg')
    ->getMatch();

here is MyStorage class

<?php

namespace App\MySupport;

class MyStorage
{
    private $flag;
    private $disk;
    private $matches;

    public function __construct()
    {
        $this->flag = false;
        $this->disk = '';
        $this->matches = [];
    }

    public function disk($disk)
    {
        $this->disk = $disk;
        return $this;
    }

    public function addDirFilter($filter)
    {
        if (! $this->flag)
        {
            $this->flag = true;
            $subDirs[] = \Storage::disk($this->disk)->directories();
        }
        else
        {
            foreach ($this->matches as $dir)
            {
                $subDirs[] = \Storage::disk($this->disk)->directories($dir);
            }
        }

        $this->findMatch($subDirs, $filter);
        return $this;
    }

    public function addFileFilter($filter)
    {
        if (! $this->flag)
        {
            $this->flag = true;
            $subFiles[] = \Storage::disk($this->disk)->files();
        }
        else
        {
            foreach ($this->matches as $dir)
            {
                $subFiles[] = \Storage::disk($this->disk)->files($dir);
            }
        }

        $this->findMatch($subFiles, $filter);
        return $this;
    }

    public function findMatch($subItems, $filter)
    {
        // set empty before update
        $this->matches = [];

        // if call this method by addDirFilter() , $subItem contain the Dir path, eg, DirA/DirB
        // if call this method by addFileFilter() , $subItem contain the File path, eg, DirX/File.txt
        foreach (array_collapse($subItems) as $subItem)
        {
            // get the last str, eg, DirB OR File.txt
            $lastStr = @end(explode('/', $subItem));

            if ( preg_match('/^' . $filter . '$/u', $lastStr) )
            {
                // update new matches
                $this->matches[] = $subItem;
            }
        }
    }

    public function getMatch()
    {
        return $this->matches;
    }
}

Usage

<?php

namespace App\Http\Controllers;
use App\MySupport\MyStorage;

class TestController extends Controller
{
    public function storageTest()
    {
        $MyStorage = new MyStorage();
        
        // for example in my dropbox disk have
        // 
        // school/2018-01-01/emails.txt
        // school/2018-02-02/Peter.jpg
        // travel/2017-06-06/TW.jpg

        $folders = $MyStorage->disk('dropbox')
                             ->addDirFilter('school')
                             ->addDirFilter('\d{4}-\d{2}-\d{2}')
                             ->getMatch();
        // $folders result is:
        // school/2018-01-01
        // school/2018-02-02

        $files = $MyStorage->disk('dropbox')
                           ->addDirFilter('(school|travel)')
                           ->addDirFilter('\d{4}-\d{2}-\d{2}')
                           ->addFileFilter('.*\.jpg')
                           ->getMatch();
        // $files result is:
        // school/2018-02-02/Peter.jpg
        // travel/2017-06-06/TW.jpg
    }
}

i tested seems all fine

can anyone point me to the direction, how to use MyStorage class just like Laravel 5.5 build in Storage class, thanks

You should use static function. Try replace your function as code below.

 public static function disk($disk)
 {
     $instance = new MyStorage();
     $instance->disk = $disk;
     return $instance;

Furthermore, I would suggest you learn singleton design pattern