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
|
<?php declare(strict_types = 0);
/*
** Copyright (C) 2001-2025 Zabbix SIA
**
** This program is free software: you can redistribute it and/or modify it under the terms of
** the GNU Affero General Public License as published by the Free Software Foundation, version 3.
**
** This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
** without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
** See the GNU Affero General Public License for more details.
**
** You should have received a copy of the GNU Affero General Public License along with this program.
** If not, see <https://www.gnu.org/licenses/>.
**/
/**
* Class for validating math functions.
*/
class CMathFunctionValidator extends CValidator {
/**
* An options array.
*
* Supported options:
* 'parameters' => [] Number of required parameters of known math functions.
*
* @var array
*/
private $options = [
'parameters' => []
];
/**
* @param array $options
*/
public function __construct(array $options = []) {
$this->options = $options + $this->options;
}
/**
* Validate math function.
*
* @param array $token A token of CExpressionParserResult::TOKEN_TYPE_MATH_FUNCTION type.
*
* @return bool
*/
public function validate($token) {
if (!array_key_exists($token['data']['function'], $this->options['parameters'])) {
$this->setError(_s('unknown function "%1$s"', $token['data']['function']));
return false;
}
$num_parameters = count($token['data']['parameters']);
foreach ($this->options['parameters'][$token['data']['function']] as $rule) {
$is_valid = true;
if (array_key_exists('count', $rule)) {
$is_valid = $num_parameters == $rule['count'];
}
if ($is_valid && array_key_exists('min', $rule)) {
$is_valid = $num_parameters >= $rule['min'];
if ($is_valid && array_key_exists('step', $rule)) {
$is_valid = ($num_parameters - $rule['min']) % $rule['step'] == 0;
}
}
if ($is_valid && array_key_exists('max', $rule)) {
$is_valid = $num_parameters <= $rule['max'];
}
if ($is_valid) {
return true;
}
}
$this->setError(_s('invalid number of parameters in function "%1$s"', $token['data']['function']));
return false;
}
}
|
