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/>.

**/

​

​

/**

 * A parser for Prometheus output.

 */

class CPrometheusOutputParser extends CParser {

​

    /**

     * @var array

     */

    private $macro_parsers = [];

​

    private $options = [

        'usermacros' => false,

        'lldmacros' => false

    ];

​

    public function __construct($options = []) {

        $this->options = $options + $this->options;

​

        if ($this->options['usermacros']) {

            array_push($this->macro_parsers, new CUserMacroParser, new CUserMacroFunctionParser);

        }

        if ($this->options['lldmacros']) {

            array_push($this->macro_parsers, new CLLDMacroParser, new CLLDMacroFunctionParser);

        }

    }

​

    /**

     * Parse the given source string.

     *

     * @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 = '';

​

        $p = $pos;

​

        if (preg_match('/^[a-zA-Z_][a-zA-Z0-9_]*/', substr($source, $p), $matches)) {

            $p += strlen($matches[0]);

        }

        else {

            foreach ($this->macro_parsers as $macro_parser) {

                if ($macro_parser->parse($source, $p) != self::PARSE_FAIL) {

                    $p += $macro_parser->getLength();

                    break;

                }