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157 lines
4.3 KiB
157 lines
4.3 KiB
1 year ago
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<?php
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/*
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** Zabbix
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** Copyright (C) 2001-2023 Zabbix SIA
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**/
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/**
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* A parser for update intervals.
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*/
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class CUpdateIntervalParser extends CParser {
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private $simple_interval_parser;
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private $flexible_interval_parser;
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private $scheduling_interval_parser;
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private $delay;
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private $intervals = [];
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private $options = [
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'usermacros' => false,
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'lldmacros' => false
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];
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public function __construct($options = []) {
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if (array_key_exists('usermacros', $options)) {
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$this->options['usermacros'] = $options['usermacros'];
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}
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if (array_key_exists('lldmacros', $options)) {
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$this->options['lldmacros'] = $options['lldmacros'];
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}
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$this->simple_interval_parser = new CSimpleIntervalParser([
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'usermacros' => $this->options['usermacros'],
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'lldmacros' => $this->options['lldmacros']
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]);
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$this->flexible_interval_parser = new CFlexibleIntervalParser([
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'usermacros' => $this->options['usermacros'],
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'lldmacros' => $this->options['lldmacros']
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]);
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$this->scheduling_interval_parser = new CSchedulingIntervalParser([
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'usermacros' => $this->options['usermacros'],
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'lldmacros' => $this->options['lldmacros']
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]);
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}
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/**
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* Parse the given source string. The string must contain simple interval and possibly more multiple intervals of
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* two types - flexible and scheduling - separated by a semicolon.
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*
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* (simple|{$M}|{#M});(flexible|scheduled|{$M}|{#M});...
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*
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* @param string $source Source string that needs to be parsed.
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* @param int $pos Position offset.
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*/
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public function parse($source, $pos = 0) {
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$this->length = 0;
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$this->match = '';
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$this->delay = '';
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$this->intervals = [];
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$p = $pos;
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// First interval must be simple interval (or macro). Other intervals may be mixed and repeat multiple times.
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if ($this->simple_interval_parser->parse($source, $p) == self::PARSE_FAIL) {
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$this->errorPos($source, $p);
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return self::PARSE_FAIL;
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}
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$p += $this->simple_interval_parser->getLength();
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$this->delay = $this->simple_interval_parser->getMatch();
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while (isset($source[$p]) && $source[$p] === ';') {
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$p++;
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if ($this->flexible_interval_parser->parse($source, $p) != self::PARSE_FAIL) {
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$p += $this->flexible_interval_parser->getLength();
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$this->intervals[] = [
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'type' => ITEM_DELAY_FLEXIBLE,
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'interval' => $this->flexible_interval_parser->getMatch(),
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'update_interval' => $this->flexible_interval_parser->getUpdateInterval(),
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'time_period' => $this->flexible_interval_parser->getTimePeriod()
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];
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}
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elseif ($this->scheduling_interval_parser->parse($source, $p) != self::PARSE_FAIL) {
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$p += $this->scheduling_interval_parser->getLength();
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$this->intervals[] = [
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'type' => ITEM_DELAY_SCHEDULING,
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'interval' => $this->scheduling_interval_parser->getMatch()
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];
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}
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else {
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$p--;
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break;
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}
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}
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$this->length = $p - $pos;
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$this->match = substr($source, $pos, $this->length);
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if (!isset($source[$p])) {
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return self::PARSE_SUCCESS;
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}
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$this->errorPos($source, $p);
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return self::PARSE_SUCCESS_CONT;
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}
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/**
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* Get delay value from source string.
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*
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* @return string
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*/
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public function getDelay() {
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return $this->delay;
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}
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/**
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* Get all intervals, or specifically flexible or scheduling ones.
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*
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* @param int|null $type ITEM_DELAY_FLEXIBLE, ITEM_DELAY_SCHEDULING, or null for both.
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*
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* @return array
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*/
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public function getIntervals(?int $type = null) {
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if ($type === null) {
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return $this->intervals;
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}
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$intervals = [];
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foreach ($this->intervals as $interval) {
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if ($interval['type'] == $type) {
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$intervals[] = $interval['interval'];
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}
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}
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return $intervals;
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}
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}
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