|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Mbright\Validation\Rule\Validate; |
|
4
|
|
|
|
|
5
|
|
|
class Isbn implements ValidateRuleInterface |
|
6
|
|
|
{ |
|
7
|
|
|
/** |
|
8
|
|
|
* Validates that the value represents an ISBN. |
|
9
|
|
|
* |
|
10
|
|
|
* @param object $subject The subject to be filtered. |
|
11
|
|
|
* @param string $field The subject field name. |
|
12
|
|
|
* |
|
13
|
|
|
* @return bool True if valid, false if not. |
|
14
|
|
|
*/ |
|
15
|
60 |
|
public function __invoke($subject, string $field): bool |
|
16
|
|
|
{ |
|
17
|
60 |
|
$value = $this->normalize($subject, $field); |
|
18
|
60 |
|
if (!$value) { |
|
19
|
3 |
|
return false; |
|
20
|
|
|
} |
|
21
|
|
|
|
|
22
|
57 |
|
return $this->isbn13($value) || $this->isbn10($value); |
|
23
|
|
|
} |
|
24
|
|
|
|
|
25
|
|
|
/** |
|
26
|
|
|
* Removes all non-ISBN characters to test if it is a valid ISBN. |
|
27
|
|
|
* |
|
28
|
|
|
* @param object $subject The subject to be filtered. |
|
29
|
|
|
* @param string $field The subject field name. |
|
30
|
|
|
* |
|
31
|
|
|
* @return string|false The normalized string, or false on failure. |
|
32
|
|
|
*/ |
|
33
|
60 |
|
public function normalize($subject, $field) |
|
34
|
|
|
{ |
|
35
|
60 |
|
$value = preg_replace('/(?:(?!([0-9|X$])).)*/', '', $subject->$field); |
|
36
|
60 |
|
if (preg_match('/^[0-9]{10,13}$|^[0-9]{9}X$/', $value)) { |
|
37
|
57 |
|
return $value; |
|
38
|
|
|
} |
|
39
|
3 |
|
return false; |
|
40
|
|
|
} |
|
41
|
|
|
|
|
42
|
|
|
/** |
|
43
|
|
|
* Tests if a 13 digit ISBN is correct. |
|
44
|
|
|
* |
|
45
|
|
|
* @param mixed $value The value to test. |
|
46
|
|
|
* |
|
47
|
|
|
* @return bool |
|
48
|
|
|
*/ |
|
49
|
57 |
|
protected function isbn13($value) |
|
50
|
|
|
{ |
|
51
|
57 |
|
if (strlen($value) != 13) { |
|
52
|
42 |
|
return false; |
|
53
|
|
|
} |
|
54
|
|
|
|
|
55
|
15 |
|
$even = $value{0} + $value{2} + $value{4} + $value{6} + $value{8} + $value{10} + $value{12}; |
|
56
|
15 |
|
$odd = $value{1} + $value{3} + $value{5} + $value{7} + $value{9} + $value{11}; |
|
57
|
15 |
|
$sum = $even + ($odd * 3); |
|
58
|
|
|
|
|
59
|
15 |
|
if ($sum % 10) { |
|
60
|
6 |
|
return false; |
|
61
|
|
|
} |
|
62
|
|
|
|
|
63
|
9 |
|
return true; |
|
64
|
|
|
} |
|
65
|
|
|
|
|
66
|
|
|
/** |
|
67
|
|
|
* Tests if a 10 digit ISBN is correct. |
|
68
|
|
|
* |
|
69
|
|
|
* @param mixed $value The value to test. |
|
70
|
|
|
* |
|
71
|
|
|
* @return bool |
|
72
|
|
|
*/ |
|
73
|
48 |
|
protected function isbn10($value) |
|
74
|
|
|
{ |
|
75
|
48 |
|
if (strlen($value) != 10) { |
|
76
|
6 |
|
return false; |
|
77
|
|
|
} |
|
78
|
|
|
|
|
79
|
42 |
|
$sum = $value{0} |
|
80
|
42 |
|
+ $value{1} * 2 |
|
81
|
42 |
|
+ $value{2} * 3 |
|
82
|
42 |
|
+ $value{3} * 4 |
|
83
|
42 |
|
+ $value{4} * 5 |
|
84
|
42 |
|
+ $value{5} * 6 |
|
85
|
42 |
|
+ $value{6} * 7 |
|
86
|
42 |
|
+ $value{7} * 8 |
|
87
|
42 |
|
+ $value{8} * 9; |
|
88
|
|
|
|
|
89
|
42 |
|
if ($value{9} == 'X') { |
|
90
|
9 |
|
$sum += 100; |
|
91
|
|
|
} else { |
|
92
|
33 |
|
$sum += $value{9} * 10; |
|
93
|
|
|
} |
|
94
|
|
|
|
|
95
|
42 |
|
if ($sum % 11) { |
|
96
|
3 |
|
return false; |
|
97
|
|
|
} |
|
98
|
|
|
|
|
99
|
39 |
|
return true; |
|
100
|
|
|
} |
|
101
|
|
|
} |
|
102
|
|
|
|
MarcusFulbright /
Validate
