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/>.

**/

​

class CValidationRule {

    const STATE_BEGIN = 0;

    const STATE_END = 1;

​

    /**

     * An error message if validation rule is not valid.

     *

     * @var string

     */

    private $error = '';

​

    /**

     * Parse validation rule. Returns array of rules or fail if $buffer is not valid.

     *

     * @param string $buffer

     *

     * @return array|bool

     */

    public function parse($buffer) {

        $this->error = '';

​

        $pos = 0;

        $state = self::STATE_BEGIN;

        $rules = [];

​

        while (isset($buffer[$pos])) {

            switch ($state) {

                case self::STATE_BEGIN:

                    switch ($buffer[$pos]) {

                        case ' ':

                            $pos++;

                            break;

​

                        default:

                            $rule = [];

​

                            if (!$this->parseString($buffer, $pos, $rule)

                                    && !$this->parseRangeTime($buffer, $pos, $rule)

                                    && !$this->parseAbsDate($buffer, $pos, $rule)

                                    && !$this->parseAbsTime($buffer, $pos, $rule)

                                    && !$this->parseTimePeriods($buffer, $pos, $rule)

                                    && !$this->parseTimeUnit($buffer, $pos, $rule)

                                    && !$this->parseRgb($buffer, $pos, $rule)

                                    && !$this->parseRequired($buffer, $pos, $rule)

                                    && !$this->parseNotEmpty($buffer, $pos, $rule)

                                    && !$this->parseLE($buffer, $pos, $rule)

                                    && !$this->parseJson($buffer, $pos, $rule)

                                    && !$this->parseInt32($buffer, $pos, $rule)

                                    && !$this->parseUInt64($buffer, $pos, $rule)

                                    && !$this->parseIn($buffer, $pos, $rule)

                                    && !$this->parseId($buffer, $pos, $rule)

                                    && !$this->parseGE($buffer, $pos, $rule)

                                    && !$this->parseFatal($buffer, $pos, $rule)

                                    && !$this->parseDB($buffer, $pos, $rule)

                                    && !$this->parseArrayId($buffer, $pos, $rule)

                                    && !$this->parseArrayDB($buffer, $pos, $rule)

                                    && !$this->parseArray($buffer, $pos, $rule)

                                    && !$this->parseFlags($buffer, $pos, $rule)

                                    && !$this->parseBool($buffer, $pos, $rule)

                                    && !$this->parseCuid($buffer, $pos, $rule)) {

                                // incorrect validation rule

                                break 3;

                            }

​

                            if (array_key_exists(key($rule), $rules)) {

                                // the message can be not translated because it is an internal error

                                $this->error = 'Validation rule "'.key($rule).'" already exists.';

                                return false;

                            }

​

                            $rules = array_merge($rules, $rule);

                            $state = self::STATE_END;

                            break;

                    }

                    break;

​