<?php
// KeepAliveHeader.php
// Created: 2022-02-14
// Updated: 2023-01-01

namespace Index\Http\Headers;

use Index\Http\HttpHeader;

class KeepAliveHeader {
    private int $timeOut;
    private int $max;

    public function __construct(int $timeOut, int $max) {
        $this->timeOut = $timeOut;
        $this->max = $max;
    }

    public function getTimeOut(): int {
        return $this->timeOut;
    }

    public function getMax(): int {
        return $this->max;
    }

    public static function parse(HttpHeader $header): KeepAliveHeader {
        $params = explode(',', $header->getFirstLine());
        $timeOut = -1;
        $max = -1;

        foreach($params as $param) {
            if(str_starts_with($param, 'timeout='))
                $timeOut = (int)substr($param, 8);
            elseif(str_starts_with($param, 'max='))
                $max = (int)substr($param, 4);
            if($timeOut >= 0 && $max >= 0)
                break;
        }

        return new KeepAliveHeader($timeOut, $max);
    }
}