<?php
/**
 * This service file is part of item.
 *
 * @author   ctexthuang
 * @contact  ctexthuang@qq.com
 * @web_site  https://ctexthuang.com
 */

declare(strict_types=1);

namespace App\Service\Test\Composite\File;

use App\Interface\Test\Composite\FileSystemComponentInterface;

class DirectoryComponent implements FileSystemComponentInterface
{
    /**
     * @var string
     */
    private string $name;

    /**
     * @var array
     */
    private array $children = [];

    /**
     * 构造方法
     * @param string $name
     */
    public function __construct(string $name)
    {
        $this->name = $name;
    }

    /**
     * @return string
     */
    public function getName(): string
    {
        return $this->name;
    }

    /**
     * @return int
     */
    public function getSize(): int
    {
        $size = 0;
        foreach ($this->children as $child) {
            $size += $child->getSize();
        }
        return $size;
    }

    /**
     * @param string $prefix
     * @return void
     */
    public function display(string $prefix = ''): void
    {
        echo $prefix . ":directory:" . $this->name . '(' . $this->getSize() . 'bytes)' . PHP_EOL;

        foreach ($this->children as $child) {
            $child->display($prefix ,'     ');
        }
    }

    /**
     * @param FileSystemComponentInterface $component
     * @return void
     */
    public function add(FileSystemComponentInterface $component): void
    {
        $this->children[] = $component;
    }

    /**
     * @param FileSystemComponentInterface $component
     * @return void
     */
    public function remove(FileSystemComponentInterface $component): void
    {
        $this->children = array_filter($this->children, function ($c) use ($component) {
            return $c !== $component;
        });
    }
}