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<?php
/*
** 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/>.
**/
/**
* A parser for flexible intervals.
*/
class CFlexibleIntervalParser extends CParser {
private $simple_interval_parser;
private $time_period_parser;
private $update_interval;
private $time_period;
private $options = [
'usermacros' => false,
'lldmacros' => false
];
public function __construct($options = []) {
if (array_key_exists('usermacros', $options)) {
$this->options['usermacros'] = $options['usermacros'];
}
if (array_key_exists('lldmacros', $options)) {
$this->options['lldmacros'] = $options['lldmacros'];
}
$this->simple_interval_parser = new CSimpleIntervalParser([
'usermacros' => $this->options['usermacros'],
'lldmacros' => $this->options['lldmacros']
]);
$this->time_period_parser = new CTimePeriodParser([
'usermacros' => $this->options['usermacros'],
'lldmacros' => $this->options['lldmacros']
]);
}
/**
* Parse the given flexible interval. The source string can contain macros separated by a forward slash.
*
* (simple_interval|{$M}|{#M})/(time_period|{$M}|{#M})
*
* @param string $source Source string that needs to be parsed.
* @param int $pos Position offset.
*/
public function parse($source, $pos = 0) {
$this->length = 0;
$this->match = '';
$this->update_interval = '';
$this->time_period = '';
$p = $pos;
if ($this->simple_interval_parser->parse($source, $p) == self::PARSE_FAIL) {
return self::PARSE_FAIL;
}
$update_interval = $this->simple_interval_parser->getMatch();
$p += $this->simple_interval_parser->getLength();
if (!isset($source[$p]) || $source[$p] !== '/') {
return self::PARSE_FAIL;
}
$p++;
if ($this->time_period_parser->parse($source, $p) == self::PARSE_FAIL) {
return self::PARSE_FAIL;
}
$this->update_interval = $update_interval;
$this->time_period = $this->time_period_parser->getMatch();
$p += $this->time_period_parser->getLength();
$this->length = $p - $pos;
$this->match = substr($source, $pos, $this->length);
return isset($source[$p]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS;
}
/**
* Returns matched update interval. Can contain macro.
*
* @return string
*/
public function getUpdateInterval() {
return $this->update_interval;
}
/**
* Returns matched time period. Can contain macro.
*
* @return string
*/
public function getTimePeriod() {
return $this->time_period;
}
}
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