Zabbix

<?php

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** 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 Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

​

/**

 * Trigger expression converter from 2.2 to 2.4.

 */

class C20TriggerConverter extends CConverter {

​

    /**

     * A parser for function macros.

     *

     * @var C10FunctionMacroParser

     */

    protected $function_macro_parser;

​

    /**

     * A parser for LLD macros.

     *

     * @var CLLDMacroParser

     */

    protected $lld_macro_parser;

​

    /**

     * An item key converter.

     *

     * @var C20ItemKeyConverter

     */

    protected $itemKeyConverter;

​

    public function __construct() {

        $this->function_macro_parser = new C10FunctionMacroParser();

        $this->lld_macro_parser = new CLLDMacroParser();

        $this->itemKeyConverter = new C20ItemKeyConverter();

    }

​

    /**

     * Convert a trigger expression from 2.2 format to 2.4.

     *

     * The method will replace old operators with their analogues: "&" with "and", "|" - "or" and "#" - "<>".

     *

     * @param string $expression

     *

     * @return string

     */

    public function convert($expression) {

        // find all the operators that need to be replaced

        $found_operators = [];

        for ($pos = 0; isset($expression[$pos]); $pos++) {

            switch ($expression[$pos]) {

                case '{':