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<?php
/*
** Zabbix
** Copyright (C) 2001-2019 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.
**/
/**
* A parser for time used in the time selector.
*/
class CRangeTimeParser extends CParser {
const ZBX_TIME_UNKNOWN = 0;
const ZBX_TIME_ABSOLUTE = 1;
const ZBX_TIME_RELATIVE = 2;
/**
* @var int $time_type
*/
private $time_type;
/**
* @var CRelativeTimeParser
*/
private $relative_time_parser;
/**
* @var CAbsoluteTimeParser
*/
private $absolute_time_parser;
public function __construct() {
$this->relative_time_parser = new CRelativeTimeParser();
$this->absolute_time_parser = new CAbsoluteTimeParser();
}
/**
* Parse the given period.
*
* @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->time_type = self::ZBX_TIME_UNKNOWN;
$p = $pos;
if ($this->relative_time_parser->parse($source, $p) != self::PARSE_FAIL) {
$p += $this->relative_time_parser->getLength();
$this->time_type = self::ZBX_TIME_RELATIVE;
}
elseif ($this->absolute_time_parser->parse($source, $p) != self::PARSE_FAIL) {
$p += $this->absolute_time_parser->getLength();
$this->time_type = self::ZBX_TIME_ABSOLUTE;
}
else {
return self::PARSE_FAIL;
}
$this->length = $p - $pos;
$this->match = substr($source, $pos, $this->length);
return isset($source[$p]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS;
}
public function getTimeType() {
return $this->time_type;
}
/**
* Timestamp is returned as initialized DateTime object. Returns null when timestamp is not valid.
*
* @param bool $is_start If set to true date will be modified to lowest value, example (now/w) will be returned
* as Monday of this week. When set to false precisiion will modify date to highest value,
* same example will return Sunday of this week.
*
* @return DateTime|null
*/
public function getDateTime($is_start) {
switch ($this->time_type) {
case self::ZBX_TIME_ABSOLUTE:
return $this->absolute_time_parser->getDateTime($is_start);
case self::ZBX_TIME_RELATIVE:
return $this->relative_time_parser->getDateTime($is_start);
default:
return null;
}
}
}
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