1<?php
2/*
3** Zabbix
4** Copyright (C) 2001-2021 Zabbix SIA
5**
6** This program is free software; you can redistribute it and/or modify
7** it under the terms of the GNU General Public License as published by
8** the Free Software Foundation; either version 2 of the License, or
9** (at your option) any later version.
10**
11** This program is distributed in the hope that it will be useful,
12** but WITHOUT ANY WARRANTY; without even the implied warranty of
13** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14** GNU General Public License for more details.
15**
16** You should have received a copy of the GNU General Public License
17** along with this program; if not, write to the Free Software
18** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
19**/
20
21
22/**
23 * A parser for a list of time periods separated by a semicolon.
24 */
25class CTimePeriodsParser extends CParser {
26
27	private $time_period_parser;
28
29	private $periods = [];
30	private $options = ['usermacros' => false];
31
32	public function __construct($options = []) {
33		if (array_key_exists('usermacros', $options)) {
34			$this->options['usermacros'] = $options['usermacros'];
35		}
36
37		$this->time_period_parser = new CTimePeriodParser(['usermacros' => $this->options['usermacros']]);
38	}
39
40	/**
41	 * Parse the given periods separated by a semicolon.
42	 *
43	 * @param string $source  Source string that needs to be parsed.
44	 * @param int    $pos     Position offset.
45	 */
46	public function parse($source, $pos = 0) {
47		$this->length = 0;
48		$this->match = '';
49		$this->periods = [];
50
51		$periods = [];
52		$p = $pos;
53		$offset = 0;
54
55		while (isset($source[$p + $offset])) {
56			if ($this->time_period_parser->parse($source, $p + $offset) == self::PARSE_FAIL) {
57				break;
58			}
59			$p += $offset + $this->time_period_parser->getLength();
60			$periods[] = $this->time_period_parser->getMatch();
61
62			if (isset($source[$p]) && $source[$p] !== ';') {
63				break;
64			}
65			$offset = 1;
66		}
67
68		if ($p == $pos || isset($source[$p])) {
69			return self::PARSE_FAIL;
70		}
71
72		$this->length = $p - $pos;
73		$this->match = substr($source, $pos, $this->length);
74		$this->periods = $periods;
75
76		return self::PARSE_SUCCESS;
77	}
78
79	/**
80	 * Retrieve the time periods.
81	 *
82	 * @return array
83	 */
84	public function getPeriods() {
85		return $this->periods;
86	}
87}
88