1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
|
<?php
/**
* This file is part of the ramsey/uuid library
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*
* @copyright Copyright (c) Ben Ramsey <ben@benramsey.com>
* @license http://opensource.org/licenses/MIT MIT
*/
declare(strict_types=1);
namespace Ramsey\Uuid\Generator;
use Ramsey\Uuid\Converter\TimeConverterInterface;
use Ramsey\Uuid\Exception\InvalidArgumentException;
use Ramsey\Uuid\Exception\RandomSourceException;
use Ramsey\Uuid\Exception\TimeSourceException;
use Ramsey\Uuid\Provider\NodeProviderInterface;
use Ramsey\Uuid\Provider\TimeProviderInterface;
use Ramsey\Uuid\Type\Hexadecimal;
use Throwable;
use function ctype_xdigit;
use function dechex;
use function hex2bin;
use function is_int;
use function pack;
use function sprintf;
use function str_pad;
use function strlen;
use const STR_PAD_LEFT;
/**
* DefaultTimeGenerator generates strings of binary data based on a node ID,
* clock sequence, and the current time
*/
class DefaultTimeGenerator implements TimeGeneratorInterface
{
/**
* @var NodeProviderInterface
*/
private $nodeProvider;
/**
* @var TimeConverterInterface
*/
private $timeConverter;
/**
* @var TimeProviderInterface
*/
private $timeProvider;
public function __construct(
NodeProviderInterface $nodeProvider,
TimeConverterInterface $timeConverter,
TimeProviderInterface $timeProvider
) {
$this->nodeProvider = $nodeProvider;
$this->timeConverter = $timeConverter;
$this->timeProvider = $timeProvider;
}
/**
* @throws InvalidArgumentException if the parameters contain invalid values
* @throws RandomSourceException if random_int() throws an exception/error
*
* @inheritDoc
*/
public function generate($node = null, ?int $clockSeq = null): string
{
if ($node instanceof Hexadecimal) {
$node = $node->toString();
}
$node = $this->getValidNode($node);
if ($clockSeq === null) {
try {
// This does not use "stable storage"; see RFC 4122, Section 4.2.1.1.
$clockSeq = random_int(0, 0x3fff);
} catch (Throwable $exception) {
throw new RandomSourceException(
$exception->getMessage(),
(int) $exception->getCode(),
$exception
);
}
}
$time = $this->timeProvider->getTime();
$uuidTime = $this->timeConverter->calculateTime(
$time->getSeconds()->toString(),
$time->getMicroseconds()->toString()
);
$timeHex = str_pad($uuidTime->toString(), 16, '0', STR_PAD_LEFT);
if (strlen($timeHex) !== 16) {
throw new TimeSourceException(sprintf(
'The generated time of \'%s\' is larger than expected',
$timeHex
));
}
$timeBytes = (string) hex2bin($timeHex);
return $timeBytes[4] . $timeBytes[5] . $timeBytes[6] . $timeBytes[7]
. $timeBytes[2] . $timeBytes[3]
. $timeBytes[0] . $timeBytes[1]
. pack('n*', $clockSeq)
. $node;
}
/**
* Uses the node provider given when constructing this instance to get
* the node ID (usually a MAC address)
*
* @param string|int|null $node A node value that may be used to override the node provider
*
* @return string 6-byte binary string representation of the node
*
* @throws InvalidArgumentException
*/
private function getValidNode($node): string
{
if ($node === null) {
$node = $this->nodeProvider->getNode();
}
// Convert the node to hex, if it is still an integer.
if (is_int($node)) {
$node = dechex($node);
}
if (!ctype_xdigit((string) $node) || strlen((string) $node) > 12) {
throw new InvalidArgumentException('Invalid node value');
}
return (string) hex2bin(str_pad((string) $node, 12, '0', STR_PAD_LEFT));
}
}
|
