feat : Composite file

app/Service/Test/Composite/File/DirectoryComponent.php

@@ -0,0 +1,89 @@
+<?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;
+        });
+    }
+}