feat: initial version

Signed-off-by: Sebastian Krupinski <root@LAPTOP-7DVOR6NC>

lib/Client/Mime/Part/Part.php

@@ -0,0 +1,36 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Gricob\IMAP\Mime\Part;
+
+abstract readonly class Part
+{
+    public string $type;
+    public string $subtype;
+
+    /**
+     * @var array<string, string>
+     */
+    public array $attributes;
+
+    /**
+     * @param array<string,string> $attributes
+     */
+    public function __construct(
+        string $type,
+        string $subtype,
+        array $attributes,
+    ) {
+        $this->subtype = strtolower($subtype);
+        $this->type = strtolower($type);
+        $this->attributes = $attributes;
+    }
+
+    abstract public function findPartByMimeType(string $mimeType): ?SinglePart;
+
+    public function mimeType(): string
+    {
+        return $this->type.'/'.$this->subtype;
+    }
+}