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 function macros like "{{ITEM.VALUE}.func()}".
24 */
25class CMacroFunctionParser extends CParser {
26
27	/**
28	 * Parser for generic macros.
29	 *
30	 * @var CMacroParser
31	 */
32	private $macro_parser;
33
34	/**
35	 * Parser for trigger functions.
36	 *
37	 * @var CFunctionParser
38	 */
39	private $function_parser;
40
41	/**
42	 * @param array $macros   The list of macros, for example ['{ITEM.VALUE}', '{ITEM.LASTVALUE}'].
43	 * @param array $options
44	 */
45	public function __construct(array $macros, array $options = []) {
46		$this->macro_parser = new CMacroParser($macros, $options);
47		$this->function_parser = new CFunctionParser();
48	}
49
50	/**
51	 * @param string $source
52	 * @param int    $pos
53	 *
54	 * @return int
55	 */
56	public function parse($source, $pos = 0) {
57		$this->length = 0;
58		$this->match = '';
59
60		$p = $pos;
61
62		if (!isset($source[$p]) || $source[$p] !== '{') {
63			return self::PARSE_FAIL;
64		}
65		$p++;
66
67		if ($this->macro_parser->parse($source, $p) == CParser::PARSE_FAIL) {
68			return self::PARSE_FAIL;
69		}
70		$p += $this->macro_parser->getLength();
71
72		if (!isset($source[$p]) || $source[$p] !== '.') {
73			return self::PARSE_FAIL;
74		}
75		$p++;
76
77		if ($this->function_parser->parse($source, $p) == CParser::PARSE_FAIL) {
78			return self::PARSE_FAIL;
79		}
80		$p += $this->function_parser->getLength();
81
82		if (!isset($source[$p]) || $source[$p] !== '}') {
83			return self::PARSE_FAIL;
84		}
85		$p++;
86
87		$this->length = $p - $pos;
88		$this->match = substr($source, $pos, $this->length);
89
90		return (isset($source[$pos + $this->length]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS);
91	}
92
93	/**
94	 * Returns macro parser.
95	 *
96	 * @return string
97	 */
98	public function getMacroParser() {
99		return $this->macro_parser;
100	}
101
102	/**
103	 * Returns function parser.
104	 *
105	 * @return string
106	 */
107	public function getFunctionParser() {
108		return $this->function_parser;
109	}
110}
111