<?php

namespace App\Classes\File;

use App\Classes\FTN\Tic as FTNTic;
use App\Models\{Address,File};

class Tic extends Item
{
	/**
	 * @throws \Exception
	 */
	public function __construct(Address $ao,File $fo,int $action)
	{
		$this->action |= $action;

		$tic = new FTNTic;

		switch ($action) {
			case self::I_SEND:
				$this->file = $tic->generate($ao,$fo);
				$this->file_type = self::IS_TIC;
				$this->file_name = sprintf('%s.tic',sprintf('%08x',$fo->id));
				$this->file_size = strlen($this->file);
				$this->file_mtime = $fo->created_at->timestamp;

				break;

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

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