Zabbix

<?php declare(strict_types = 0);

/*

** 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/>.

**/

​

​

/**

 * Class for storing the result returned by the trigger expression parser.

 */

class CExpressionParserResult extends CParserResult {

​

    const TOKEN_TYPE_OPEN_BRACE = 0;

    const TOKEN_TYPE_CLOSE_BRACE = 1;

    const TOKEN_TYPE_OPERATOR = 2;

    const TOKEN_TYPE_NUMBER = 3;

    const TOKEN_TYPE_MACRO = 4;

    const TOKEN_TYPE_USER_MACRO = 5;

    const TOKEN_TYPE_LLD_MACRO = 6;

    const TOKEN_TYPE_STRING = 7;

    const TOKEN_TYPE_FUNCTIONID_MACRO = 8;

    const TOKEN_TYPE_HIST_FUNCTION = 9;

    const TOKEN_TYPE_MATH_FUNCTION = 10;

    const TOKEN_TYPE_EXPRESSION = 11;

​

    /**

     * Array of tokens.

     *

     * @var array

     */

    protected $tokens = [];

​

    /**

     * Return the expression tokens.

     *

     * @see CExpressionParserResult::$token    for the structure of a token array

     *

     * @return array

     */

    public function getTokens() {

        return $this->tokens;

    }

​

    /**

     * Add a token to the result.

     *

     * @param CParserResult $token

     */

    public function addTokens(array $tokens): void {

        $this->tokens = array_merge($this->tokens, $tokens);

    }

​

    /**

     * Auxiliary method for getTokensOfTypes().

     *

     * @param array  $tokens

     * @param array  $types

     *

     * @return array

     */

    private static function _getTokensOfTypes(array $tokens, array $types) {

        $result = [];

​

        foreach ($tokens as $token) {

            if (in_array($token['type'], $types)) {

                $result[] = $token;

            }

​

            if ($token['type'] == CExpressionParserResult::TOKEN_TYPE_EXPRESSION) {

                $result = array_merge($result, self::_getTokensOfTypes($token['data']['tokens'], $types));

            }

            elseif ($token['type'] == CExpressionParserResult::TOKEN_TYPE_MATH_FUNCTION) {

                foreach ($token['data']['parameters'] as $parameter) {

                    $result = array_merge($result, self::_getTokensOfTypes($parameter['data']['tokens'], $types));

                }

            }

        }

​

        return $result;

    }

​

    /**