Transfering netmail via EMSI

app/Classes/File/Mail.php

@@ -0,0 +1,38 @@
+<?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)
+	{
+		$this->action |= $action;
+
+		switch ($action) {
+			case self::I_SEND:
+				$this->file = $mail;
+				$this->file_name = sprintf('%08X.PKT',Carbon::now()->timestamp);
+				$this->file_size = strlen($mail);
+				$this->file_mtime = Carbon::now()->timestamp;	// @todo This timestamp should be consistent incase of retries
+
+				break;
+
+			default:
+				throw new \Exception('Unknown action: '.$action);
+		}
+	}
+
+	public function read(int $start,int $length): string
+	{
+		return substr((string)$this->file,$start,$length);
+	}
+}