clrghouz/app/Classes/File/Mail.php

<?php

namespace App\Classes\File;

use Carbon\Carbon;

use App\Classes\FTN\Packet;

class Mail extends Item
{
	private Packet $file;

	/**
	 * @throws \Exception
	 */
	public function __construct(Packet $mail,int $action)
	{
		switch ($action) {
			case self::I_SEND:
				$this->file = $mail;

				break;

			default:
				throw new \Exception('Unknown action: '.$action);
		}

		$this->action = $action;
	}

	public function __get($key) {
		switch ($key) {
			case 'file': return $this->file;
			case 'messages': return $this->file->messages;
			default:
				return parent::__get($key);
		}
	}

	public function read(int $start,int $length): string
	{
		return substr((string)$this->file,$start,$length);
	}

	public function youngest(): Carbon
	{
		return $this->file->messages->pluck('date')->sort()->last();
	}
}