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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 update intervals.
*/
class CUpdateIntervalParser extends CParser {
private $simple_interval_parser;
private $flexible_interval_parser;
private $scheduling_interval_parser;
private $delay;
private $intervals = [];
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->flexible_interval_parser = new CFlexibleIntervalParser([
'usermacros' => $this->options['usermacros'],
'lldmacros' => $this->options['lldmacros']
]);
$this->scheduling_interval_parser = new CSchedulingIntervalParser([
'usermacros' => $this->options['usermacros'],
'lldmacros' => $this->options['lldmacros']
]);
}
/**
* Parse the given source string. The string must contain simple interval and possibly more multiple intervals of
* two types - flexible and scheduling - separated by a semicolon.
*
* (simple|{$M}|{#M});(flexible|scheduled|{$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->delay = '';
$this->intervals = [];
$p = $pos;
// First interval must be simple interval (or macro). Other intervals may be mixed and repeat multiple times.
if ($this->simple_interval_parser->parse($source, $p) == self::PARSE_FAIL) {
$this->errorPos($source, $p);
return self::PARSE_FAIL;
}
$p += $this->simple_interval_parser->getLength();
$this->delay = $this->simple_interval_parser->getMatch();
while (isset($source[$p]) && $source[$p] === ';') {
$p++;
if ($this->flexible_interval_parser->parse($source, $p) != self::PARSE_FAIL) {
$p += $this->flexible_interval_parser->getLength();
$this->intervals[] = [
'type' => ITEM_DELAY_FLEXIBLE,
'interval' => $this->flexible_interval_parser->getMatch(),
'update_interval' => $this->flexible_interval_parser->getUpdateInterval(),
'time_period' => $this->flexible_interval_parser->getTimePeriod()
];
}
elseif ($this->scheduling_interval_parser->parse($source, $p) != self::PARSE_FAIL) {
$p += $this->scheduling_interval_parser->getLength();
$this->intervals[] = [
'type' => ITEM_DELAY_SCHEDULING,
'interval' => $this->scheduling_interval_parser->getMatch()
];
}
else {
$p--;
break;
}
}
$this->length = $p - $pos;
$this->match = substr($source, $pos, $this->length);
if (!isset($source[$p])) {
return self::PARSE_SUCCESS;
}
$this->errorPos($source, $p);
return self::PARSE_SUCCESS_CONT;
}
/**
* Get delay value from source string.
*
* @return string
*/
public function getDelay() {
return $this->delay;
}
/**
* Get all intervals, or specifically flexible or scheduling ones.
*
* @param int|null $type ITEM_DELAY_FLEXIBLE, ITEM_DELAY_SCHEDULING, or null for both.
*
* @return array
*/
public function getIntervals(?int $type = null) {
if ($type === null) {
return $this->intervals;
}
$intervals = [];
foreach ($this->intervals as $interval) {
if ($interval['type'] == $type) {
$intervals[] = $interval['interval'];
}
}
return $intervals;
}
}
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