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156 lines
3.8 KiB
156 lines
3.8 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 absolute time in "YYYY[-MM[-DD]][ hh[:mm[:ss]]]" format.
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*/
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class CAbsoluteTimeParser extends CParser {
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/**
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* Full date in "YYYY-MM-DD hh:mm:ss" format.
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*
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* @var string $date
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*/
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private $date;
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/**
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* @var array $tokens
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*/
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private $tokens;
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/**
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* Parse the given period.
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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->tokens = [];
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$this->length = 0;
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$this->match = '';
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$this->date = '';
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$p = $pos;
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if (!$this->parseAbsoluteTime($source, $p)) {
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return self::PARSE_FAIL;
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}
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$this->length = $p - $pos;
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$this->match = substr($source, $pos, $this->length);
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return isset($source[$p]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS;
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}
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/**
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* Parse absolute time.
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*
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* @param string $source
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* @param int $pos
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*
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* @return bool
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*/
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private function parseAbsoluteTime($source, &$pos) {
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$pattern_Y = '(?P<Y>[12][0-9]{3})';
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$pattern_m = '(?P<m>[0-9]{1,2})';
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$pattern_d = '(?P<d>[0-9]{1,2})';
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$pattern_H = '(?P<H>[0-9]{1,2})';
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$pattern_i = '(?P<i>[0-9]{1,2})';
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$pattern_s = '(?P<s>[0-9]{1,2})';
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$pattern = $pattern_Y.'(-'.$pattern_m.'(-'.$pattern_d.'( +'.$pattern_H.'(:'.$pattern_i.'(:'.$pattern_s.')?)?)?)?)?';
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if (!preg_match('/^'.$pattern.'/', substr($source, $pos), $matches)) {
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return false;
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}
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foreach (['Y', 'm', 'd', 'H', 'i', 's'] as $key) {
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if (array_key_exists($key, $matches)) {
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$this->tokens[$key] = $matches[$key];
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}
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}
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$matches += ['m' => 1, 'd' => 1, 'H' => 0, 'i' => 0, 's' => 0];
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$date = sprintf('%04d-%02d-%02d %02d:%02d:%02d', $matches['Y'], $matches['m'], $matches['d'], $matches['H'],
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$matches['i'], $matches['s']
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);
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$datetime = date_create($date);
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if ($datetime === false) {
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return false;
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}
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$datetime_errors = $datetime->getLastErrors();
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if ($datetime_errors !== false && $datetime_errors['warning_count'] != 0) {
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return false;
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}
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$this->date = $date;
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$pos += strlen($matches[0]);
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return true;
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}
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/**
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* Get DateTime object with its value set to either start or end of the period derived from the date/time specified.
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*
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* @param $is_start
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* @param DateTimeZone|null $timezone
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*
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* @return DateTime|null
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*/
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public function getDateTime($is_start, DateTimeZone $timezone = null): ?DateTime {
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if ($this->date === '') {
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return null;
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}
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$date = new DateTime($this->date, $timezone);
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if ($is_start) {
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return $date;
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}
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if (!array_key_exists('m', $this->tokens)) {
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return $date->modify('last day of December this year 23:59:59');
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}
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if (!array_key_exists('d', $this->tokens)) {
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return $date->modify('last day of this month 23:59:59');
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}
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if (!array_key_exists('H', $this->tokens)) {
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return $date->modify('23:59:59');
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}
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if (!array_key_exists('i', $this->tokens)) {
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return new DateTime($date->format('Y-m-d H:59:59'), $timezone);
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}
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if (!array_key_exists('s', $this->tokens)) {
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return new DateTime($date->format('Y-m-d H:i:59'), $timezone);
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}
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return $date;
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}
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}
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