|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
namespace Popy\Calendar\Formatter\NumberConverter; |
|
4
|
|
|
|
|
5
|
|
|
use Popy\Calendar\Formatter\NumberConverterInterface; |
|
6
|
|
|
|
|
7
|
|
|
/** |
|
8
|
|
|
* Converts years for RFC2550 Implementation. |
|
9
|
|
|
* |
|
10
|
|
|
* @link https://tools.ietf.org/html/rfc2550 |
|
11
|
|
|
*/ |
|
12
|
|
|
class RFC2550 implements NumberConverterInterface |
|
13
|
|
|
{ |
|
14
|
|
|
const ORD_START = 65; |
|
15
|
|
|
const POSITIVE_CHARS = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ^'; |
|
16
|
|
|
const NEGATIVE_CHARS = '9876543210ZYXWVUTSRQPONMLKJIHGFEDCBA!'; |
|
17
|
|
|
|
|
18
|
|
|
/** |
|
19
|
|
|
* @inheritDoc |
|
20
|
|
|
*/ |
|
21
|
|
|
public function to($input) |
|
22
|
|
|
{ |
|
23
|
|
|
$input = (string)$input; |
|
24
|
|
|
|
|
25
|
|
|
if ($input[0] === '-' || preg_match('/^0+$/', $input)) { |
|
26
|
|
|
return $this->convertNegativeTo($input); |
|
27
|
|
|
} |
|
28
|
|
|
|
|
29
|
|
|
return $this->convertPositiveTo($input); |
|
30
|
|
|
} |
|
31
|
|
|
|
|
32
|
|
|
/** |
|
33
|
|
|
* Convert a positive value into its RFC2550 representation. |
|
34
|
|
|
* |
|
35
|
|
|
* @param string $input Value (as a string) |
|
36
|
|
|
* |
|
37
|
|
|
* @return string |
|
38
|
|
|
*/ |
|
39
|
|
|
protected function convertPositiveTo($input) |
|
40
|
|
|
{ |
|
41
|
|
|
$extraLen = strlen($input) - 5; |
|
42
|
|
|
|
|
43
|
|
|
if ($extraLen < 0) { |
|
44
|
|
|
return str_pad($input, 4, '0', STR_PAD_LEFT); |
|
45
|
|
|
} |
|
46
|
|
|
|
|
47
|
|
|
if ($extraLen < 26) { |
|
48
|
|
|
return chr(static::ORD_START + $extraLen) . $input; |
|
49
|
|
|
} |
|
50
|
|
|
|
|
51
|
|
|
$extraLen -= 25; |
|
52
|
|
|
|
|
53
|
|
|
$prefix = ''; |
|
54
|
|
|
$carets = ''; |
|
55
|
|
|
|
|
56
|
|
|
do { |
|
57
|
|
|
$carets .= '^'; |
|
58
|
|
|
$extraLen--; |
|
59
|
|
|
|
|
60
|
|
|
$prefix = chr(static::ORD_START + $extraLen % 26) . $prefix; |
|
61
|
|
|
$extraLen = intval($extraLen / 26); |
|
62
|
|
|
} while ($extraLen); |
|
63
|
|
|
|
|
64
|
|
|
return "${carets}${prefix}${input}"; |
|
65
|
|
|
} |
|
66
|
|
|
|
|
67
|
|
|
/** |
|
68
|
|
|
* Converts a negative value into its RFC2550 representation. |
|
69
|
|
|
* |
|
70
|
|
|
* @param string $input Value (as a string) |
|
71
|
|
|
* |
|
72
|
|
|
* @return string |
|
73
|
|
|
*/ |
|
74
|
|
|
protected function convertNegativeTo($input) |
|
75
|
|
|
{ |
|
76
|
|
|
$res = $this->convertPositiveTo(substr($input, 1)); |
|
77
|
|
|
|
|
78
|
|
|
$res = strtr($res, static::POSITIVE_CHARS, static::NEGATIVE_CHARS); |
|
79
|
|
|
|
|
80
|
|
|
if (strlen($res) < 5) { |
|
81
|
|
|
$res = '/' . $res; |
|
82
|
|
|
} elseif ($res[0] !== '!') { |
|
83
|
|
|
$res = '*' . $res; |
|
84
|
|
|
} |
|
85
|
|
|
|
|
86
|
|
|
return $res; |
|
87
|
|
|
} |
|
88
|
|
|
|
|
89
|
|
|
/** |
|
90
|
|
|
* @inheritDoc |
|
91
|
|
|
*/ |
|
92
|
|
|
public function from($input) |
|
93
|
|
|
{ |
|
94
|
|
|
if (strpos('!/*', $input[0]) !== false) { |
|
95
|
|
|
return $this->convertFromNegative($input); |
|
96
|
|
|
} |
|
97
|
|
|
|
|
98
|
|
|
return $this->convertFromPositive($input); |
|
99
|
|
|
} |
|
100
|
|
|
|
|
101
|
|
|
/** |
|
102
|
|
|
* Convert a positive representation. |
|
103
|
|
|
* |
|
104
|
|
|
* @param string $input |
|
105
|
|
|
* |
|
106
|
|
|
* @return string|null |
|
107
|
|
|
*/ |
|
108
|
|
|
public function convertFromPositive($input) |
|
109
|
|
|
{ |
|
110
|
|
|
$matches = []; |
|
111
|
|
|
|
|
112
|
|
|
if ( |
|
113
|
|
|
!preg_match( |
|
114
|
|
|
' |
|
115
|
|
|
/^0*(?<carets>\\^*)(?<alpha>[A-Z]*)(?<year>\d+)$/', |
|
116
|
|
|
$input, |
|
117
|
|
|
$matches |
|
118
|
|
|
) |
|
119
|
|
|
) { |
|
120
|
|
|
return null; |
|
121
|
|
|
} |
|
122
|
|
|
|
|
123
|
|
|
if ($matches['alpha'] === '') { |
|
124
|
|
|
return $matches['year']; |
|
125
|
|
|
} |
|
126
|
|
|
|
|
127
|
|
|
if ($matches['carets'] === '') { |
|
128
|
|
|
$expectedLength = ord($matches['alpha']) - static::ORD_START + 5; |
|
129
|
|
|
} else { |
|
130
|
|
|
$len = strlen($matches['carets']); |
|
131
|
|
|
|
|
132
|
|
|
$expectedLength = 0; |
|
133
|
|
|
|
|
134
|
|
|
for ($i=0; $i < $len; $i++) { |
|
135
|
|
|
$expectedLength = $expectedLength * 26; |
|
136
|
|
|
$expectedLength += ord($matches['alpha'][$i]) - static::ORD_START; |
|
137
|
|
|
$expectedLength++; |
|
138
|
|
|
} |
|
139
|
|
|
|
|
140
|
|
|
$expectedLength += 30; |
|
141
|
|
|
} |
|
142
|
|
|
|
|
143
|
|
|
return str_pad($matches['year'], $expectedLength, '0', STR_PAD_RIGHT); |
|
144
|
|
|
} |
|
145
|
|
|
|
|
146
|
|
|
/** |
|
147
|
|
|
* Convert a negative representation. |
|
148
|
|
|
* |
|
149
|
|
|
* @param string $input |
|
150
|
|
|
* |
|
151
|
|
|
* @return string|null |
|
152
|
|
|
*/ |
|
153
|
|
|
public function convertFromNegative($input) |
|
154
|
|
|
{ |
|
155
|
|
|
if (strpos('/*', $input[0]) !== false) { |
|
156
|
|
|
$input = substr($input, 1); |
|
157
|
|
|
} |
|
158
|
|
|
|
|
159
|
|
|
$input = strtr($input, static::NEGATIVE_CHARS, static::POSITIVE_CHARS); |
|
160
|
|
|
|
|
161
|
|
|
$res = $this->convertFromPositive($input); |
|
162
|
|
|
|
|
163
|
|
|
if (preg_match('/^0+$/', $res)) { |
|
164
|
|
|
return $res; |
|
165
|
|
|
} |
|
166
|
|
|
|
|
167
|
|
|
return '-' . $res; |
|
168
|
|
|
} |
|
169
|
|
|
} |
|
170
|
|
|
|
popy-dev /
popy-calendar
