|
1
|
|
|
<?php |
|
2
|
|
|
|
|
3
|
|
|
/* |
|
4
|
|
|
* This file is part of the TheAlternativeZurich/events project. |
|
5
|
|
|
* |
|
6
|
|
|
* (c) Florian Moser <[email protected]> |
|
7
|
|
|
* |
|
8
|
|
|
* For the full copyright and license information, please view the LICENSE |
|
9
|
|
|
* file that was distributed with this source code. |
|
10
|
|
|
*/ |
|
11
|
|
|
|
|
12
|
|
|
namespace App\Helper; |
|
13
|
|
|
|
|
14
|
|
|
class RandomHelper |
|
15
|
|
|
{ |
|
16
|
|
|
/** |
|
17
|
|
|
* @return bool|string |
|
18
|
|
|
*/ |
|
19
|
|
|
public static function generateHumanReadableRandom(int $minimalLength, string $divider) |
|
20
|
|
|
{ |
|
21
|
|
|
$vocals = 'aeiou'; |
|
22
|
|
|
$vocalsLength = mb_strlen($vocals); |
|
23
|
|
|
|
|
24
|
|
|
//skip because ambiguous: ck, jyi |
|
25
|
|
|
$normals = 'bdfghklmnpqrstvwxz'; |
|
26
|
|
|
$normalsLength = mb_strlen($normals); |
|
27
|
|
|
|
|
28
|
|
|
$randomString = ''; |
|
29
|
|
|
$length = 0; |
|
30
|
|
|
do { |
|
31
|
|
|
if ($length > 0) { |
|
32
|
|
|
$randomString .= $divider; |
|
33
|
|
|
++$length; |
|
34
|
|
|
} |
|
35
|
|
|
|
|
36
|
|
|
// create bigger group |
|
37
|
|
|
$randomString .= self::getRandomChar($normals, $normalsLength); |
|
38
|
|
|
$randomString .= self::getRandomChar($vocals, $vocalsLength); |
|
39
|
|
|
$randomString .= self::getRandomChar($normals, $normalsLength); |
|
40
|
|
|
$length += 3; |
|
41
|
|
|
|
|
42
|
|
|
// abort if too big already |
|
43
|
|
|
if ($length > $minimalLength) { |
|
44
|
|
|
break; |
|
45
|
|
|
} |
|
46
|
|
|
|
|
47
|
|
|
// create smaller group |
|
48
|
|
|
$randomString .= $divider; |
|
49
|
|
|
$randomString .= self::getRandomChar($normals, $normalsLength); |
|
50
|
|
|
$randomString .= self::getRandomChar($vocals, $vocalsLength); |
|
51
|
|
|
$length += 3; |
|
52
|
|
|
} while ($length < $minimalLength); |
|
53
|
|
|
|
|
54
|
|
|
return $randomString; |
|
55
|
|
|
} |
|
56
|
|
|
|
|
57
|
|
|
/** |
|
58
|
|
|
* @return bool|string |
|
59
|
|
|
*/ |
|
60
|
|
|
private static function getRandomChar(string $selection, int $selectionLength) |
|
61
|
|
|
{ |
|
62
|
|
|
$entry = rand(0, $selectionLength - 1); |
|
63
|
|
|
|
|
64
|
|
|
return mb_substr($selection, $entry, 1); |
|
65
|
|
|
} |
|
66
|
|
|
} |
|
67
|
|
|
|
TheAlternativeZurich /
events
