Lines 90.00% 9 / 10
Functions and Methods 80.00% 4 / 5
Classes and Traits 0.00% 0 / 1
Name Lines Functions and Methods CRAP Classes and Traits
PacketBytes 90.00% 9 / 10 80.00% 4 / 5 6.04 0.00% 0 / 1
 __construct 0.00% 0 / 1 0.00% 0 / 1 2
 assemblePacket 100.00% 1 / 1 100.00% 1 / 1 1
 encodeString 100.00% 1 / 1 100.00% 1 / 1 1
 encodeUint16 100.00% 1 / 1 100.00% 1 / 1 1
 encodeRemainingLength 100.00% 6 / 6 100.00% 1 / 1 2
1<?php
2
3declare(strict_types=1);
4
5namespace Stewart\Mqtt\Packet;
6
7final class PacketBytes
8{
9    public const int MAX_REMAINING_LENGTH = 268_435_455;
10
11    private const int LENGTH_DIGIT_BASE = 128;
12
13    private function __construct() {}
14
15    public static function assemblePacket(PacketType $type, int $flags, string $body): string
16    {
17        return pack('C', ($type->value << 4) | $flags) . self::encodeRemainingLength(\strlen($body)) . $body;
18    }
19
20    public static function encodeString(string $value): string
21    {
22        return pack('n', \strlen($value)) . $value;
23    }
24
25    public static function encodeUint16(int $value): string
26    {
27        return pack('n', $value);
28    }
29
30    public static function encodeRemainingLength(int $length): string
31    {
32        $encoded = '';
33
34        do {
35            $digit = $length % self::LENGTH_DIGIT_BASE;
36            $length = intdiv($length, self::LENGTH_DIGIT_BASE);
37            $encoded .= pack('C', $length > 0 ? $digit | self::LENGTH_DIGIT_BASE : $digit);
38        } while ($length > 0);
39
40        return $encoded;
41    }
42}