|
1
|
|
|
<?php |
|
2
|
|
|
/** |
|
3
|
|
|
* This file is part of the Rate Limit package. |
|
4
|
|
|
* |
|
5
|
|
|
* Copyright (c) Nikola Posa |
|
6
|
|
|
* |
|
7
|
|
|
* For full copyright and license information, please refer to the LICENSE file, |
|
8
|
|
|
* located at the package root folder. |
|
9
|
|
|
*/ |
|
10
|
|
|
|
|
11
|
|
|
declare(strict_types=1); |
|
12
|
|
|
|
|
13
|
|
|
namespace RateLimit; |
|
14
|
|
|
|
|
15
|
|
|
use RateLimit\Exception\RateLimitExceededException; |
|
16
|
|
|
|
|
17
|
|
|
/** |
|
18
|
|
|
* @author Nikola Posa <[email protected]> |
|
19
|
|
|
*/ |
|
20
|
|
|
abstract class AbstractRateLimiter implements RateLimiterInterface |
|
21
|
|
|
{ |
|
22
|
|
|
/** |
|
23
|
|
|
* @var int |
|
24
|
|
|
*/ |
|
25
|
|
|
protected $limit; |
|
26
|
|
|
|
|
27
|
|
|
/** |
|
28
|
|
|
* @var int |
|
29
|
|
|
*/ |
|
30
|
|
|
protected $window; |
|
31
|
|
|
|
|
32
|
|
|
/** |
|
33
|
|
|
* @var string |
|
34
|
|
|
*/ |
|
35
|
|
|
protected $key; |
|
36
|
|
|
|
|
37
|
24 |
|
public function __construct(int $limit, int $window) |
|
38
|
|
|
{ |
|
39
|
24 |
|
$this->limit = $limit; |
|
40
|
24 |
|
$this->window = $window; |
|
41
|
24 |
|
} |
|
42
|
|
|
|
|
43
|
|
|
/** |
|
44
|
|
|
* {@inheritdoc} |
|
45
|
|
|
*/ |
|
46
|
8 |
|
public function setLimit(int $limit) |
|
47
|
|
|
{ |
|
48
|
8 |
|
$this->limit = $limit; |
|
49
|
|
|
} |
|
50
|
|
|
|
|
51
|
|
|
/** |
|
52
|
|
|
* {@inheritdoc} |
|
53
|
|
|
*/ |
|
54
|
2 |
|
public function getLimit() : int |
|
55
|
|
|
{ |
|
56
|
2 |
|
return $this->limit; |
|
57
|
|
|
} |
|
58
|
|
|
|
|
59
|
|
|
/** |
|
60
|
|
|
* {@inheritdoc} |
|
61
|
|
|
*/ |
|
62
|
14 |
|
public function getWindow() : int |
|
63
|
|
|
{ |
|
64
|
14 |
|
return $this->window; |
|
65
|
|
|
} |
|
66
|
14 |
|
|
|
67
|
7 |
|
/** |
|
68
|
|
|
* {@inheritdoc} |
|
69
|
|
|
*/ |
|
70
|
14 |
|
public function hit(string $key) |
|
71
|
14 |
|
{ |
|
72
|
14 |
|
$current = $this->getCurrent($key); |
|
73
|
|
|
|
|
74
|
|
|
if ($current >= $this->limit) { |
|
75
|
1 |
|
throw RateLimitExceededException::forKey($key); |
|
76
|
1 |
|
} |
|
77
|
|
|
|
|
78
|
|
|
if (0 === $current) { |
|
79
|
|
|
$this->init($key); |
|
80
|
|
|
return; |
|
81
|
10 |
|
} |
|
82
|
|
|
|
|
83
|
10 |
|
$this->increment($key); |
|
84
|
|
|
} |
|
85
|
|
|
|
|
86
|
|
|
/** |
|
87
|
|
|
* {@inheritdoc} |
|
88
|
|
|
*/ |
|
89
|
10 |
|
public function getRemainingAttempts(string $key) : int |
|
90
|
|
|
{ |
|
91
|
10 |
|
return max(0, $this->limit - $this->getCurrent($key)); |
|
92
|
|
|
} |
|
93
|
|
|
|
|
94
|
14 |
|
/** |
|
95
|
|
|
* {@inheritdoc} |
|
96
|
14 |
|
*/ |
|
97
|
|
|
public function getResetAt(string $key) : int |
|
98
|
|
|
{ |
|
99
|
|
|
return (int)ceil(microtime(true) + $this->ttl($key)); |
|
100
|
|
|
} |
|
101
|
|
|
|
|
102
|
|
|
protected function getCurrent(string $key) : int |
|
103
|
|
|
{ |
|
104
|
|
|
return $this->get($key, 0); |
|
105
|
|
|
} |
|
106
|
|
|
|
|
107
|
|
|
abstract protected function get(string $key, int $default) : int; |
|
108
|
|
|
|
|
109
|
|
|
abstract protected function init(string $key); |
|
110
|
|
|
|
|
111
|
|
|
abstract protected function increment(string $key); |
|
112
|
|
|
|
|
113
|
|
|
abstract protected function ttl(string $key) : float; |
|
114
|
|
|
} |
|
115
|
|
|
|
nikolaposa /
rate-limit
