<?php
/*
** Copyright (C) 2001-2026 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/>.
**/


/**
 * Convert net.tcp.service to net.udp.service.
 */
class C20ItemKeyConverter extends CConverter {

	/**
	 * Item key parser.
	 *
	 * @var CItemKey
	 */
	protected $item_key_parser;

	public function __construct() {
		$this->item_key_parser = new CItemKey();
	}

	/**
	 * Convert item key.
	 *
	 * @param string $value  Item key.
	 *
	 * @return string  Converted item key.
	 */
	public function convert($value) {
		if ($this->item_key_parser->parse($value) != CParser::PARSE_SUCCESS) {
			return $value;
		}

		$item_key = $this->item_key_parser->getKey();
		if ($item_key !== 'net.tcp.service' && $item_key !== 'net.tcp.service.perf') {
			return $value;
		}

		if ($this->item_key_parser->getParamsNum() == 0 || $this->item_key_parser->getParam(0) !== 'ntp') {
			return $value;
		}

		return substr_replace($value, 'udp', 4, 3);
	}
}
