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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
|
<?php
/*
** Zabbix
** Copyright (C) 2001-2023 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
/**
* Class to convert calculated item keys.
*/
class C52CalculatedItemConverter extends C52TriggerExpressionConverter {
/**
* Item key parser.
*
* @var CItemKey
*/
protected $item_key_parser;
/**
* Function parser.
*
* @var C10FunctionParser
*/
protected $function_parser;
public function __construct() {
$this->parser = new C10TriggerExpression([
'allow_func_only' => true,
'calculated' => true
]);
$this->item_key_parser = new CItemKey();
$this->function_parser = new C10FunctionParser();
$this->standalone_functions = getStandaloneFunctions();
}
/**
* Convert calculated item formula to 5.4 syntax.
*
* @param string $formula Calculated item formula to convert.
*
* @return string
*/
public function convert($item) {
$expression = preg_replace("/[\\r\\n\\t]/", '', $item['params']);
if ($this->parser->parse($expression) === false) {
return $item;
}
$functions = $this->parser->result->getTokensByType(C10TriggerExprParserResult::TOKEN_TYPE_FUNCTION);
$this->hanged_refs = $this->checkHangedFunctionsPerHost($functions);
for ($i = count($functions) - 1; $i >= 0; $i--) {
$fn = $functions[$i]['data'] + ['host' => '', 'item' => ''];
$query = $fn['functionParams'][0];
$colon_pos = strpos($query, ':');
$bracket_pos = strpos($query, '[');
if ($colon_pos !== false && ($bracket_pos === false || $colon_pos < $bracket_pos)) {
list($host_name, $item_key) = explode(':', $query, 2);
}
else {
$host_name = '';
$item_key = $query;
}
if ($this->item_key_parser->parse($item_key) === CParser::PARSE_SUCCESS) {
array_shift($fn['functionParams']);
array_shift($fn['functionParamsRaw']['parameters']);
[$new_expr] = $this->convertFunction($fn, $host_name, $item_key);
$expression = substr_replace($expression, $new_expr, $functions[$i]['pos'], $functions[$i]['length']);
}
}
$item['params'] = $expression;
return $item;
}
/**
* Check if each particular host reference would be linked through at least one functions according to the new
* trigger expression syntax.
*
* @param array $tokens
*
* @return array
*/
protected function checkHangedFunctionsPerHost(array $tokens): array {
$hanged_refs = ['' => false];
foreach ($tokens as $token) {
$host_name = '';
$fn = $token['data'];
$item_key = $fn['functionParams'][0];
$host_delimiter_pos = strpos($item_key, ':');
if ($host_delimiter_pos === false || $host_delimiter_pos > strpos($item_key, '[')) {
continue;
}
$host_name = substr($item_key, 0, $host_delimiter_pos);
if (!array_key_exists($host_name, $hanged_refs)) {
$hanged_refs[$host_name] = false;
}
if (!in_array($fn['functionName'], $this->standalone_functions)) {
$hanged_refs[$host_name] = true;
}
}
return $hanged_refs;
}
}
|
