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719 lines
13 KiB
719 lines
13 KiB
1 year ago
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<?php
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/*
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** Zabbix
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** Copyright (C) 2001-2023 Zabbix SIA
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**/
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class CValidationRule {
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const STATE_BEGIN = 0;
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const STATE_END = 1;
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/**
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* An error message if validation rule is not valid.
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*
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* @var string
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*/
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private $error = '';
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/**
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* Parse validation rule. Returns array of rules or fail if $buffer is not valid.
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*
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* @param string $buffer
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*
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* @return array|bool
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*/
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public function parse($buffer) {
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$this->error = '';
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$pos = 0;
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$state = self::STATE_BEGIN;
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$rules = [];
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while (isset($buffer[$pos])) {
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switch ($state) {
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case self::STATE_BEGIN:
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switch ($buffer[$pos]) {
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case ' ':
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$pos++;
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break;
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default:
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$rule = [];
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if (!$this->parseString($buffer, $pos, $rule)
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&& !$this->parseRangeTime($buffer, $pos, $rule)
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&& !$this->parseAbsDate($buffer, $pos, $rule)
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&& !$this->parseAbsTime($buffer, $pos, $rule)
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&& !$this->parseTimePeriods($buffer, $pos, $rule)
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&& !$this->parseTimeUnit($buffer, $pos, $rule)
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&& !$this->parseRgb($buffer, $pos, $rule)
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&& !$this->parseRequired($buffer, $pos, $rule)
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&& !$this->parseNotEmpty($buffer, $pos, $rule)
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&& !$this->parseLE($buffer, $pos, $rule)
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&& !$this->parseJson($buffer, $pos, $rule)
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&& !$this->parseInt32($buffer, $pos, $rule)
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&& !$this->parseUInt64($buffer, $pos, $rule)
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&& !$this->parseIn($buffer, $pos, $rule)
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&& !$this->parseId($buffer, $pos, $rule)
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&& !$this->parseGE($buffer, $pos, $rule)
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&& !$this->parseFatal($buffer, $pos, $rule)
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&& !$this->parseDB($buffer, $pos, $rule)
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&& !$this->parseArrayId($buffer, $pos, $rule)
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&& !$this->parseArrayDB($buffer, $pos, $rule)
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&& !$this->parseArray($buffer, $pos, $rule)
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&& !$this->parseFlags($buffer, $pos, $rule)
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&& !$this->parseBool($buffer, $pos, $rule)
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&& !$this->parseCuid($buffer, $pos, $rule)) {
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// incorrect validation rule
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break 3;
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}
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if (array_key_exists(key($rule), $rules)) {
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// the message can be not translated because it is an internal error
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$this->error = 'Validation rule "'.key($rule).'" already exists.';
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return false;
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}
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$rules = array_merge($rules, $rule);
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$state = self::STATE_END;
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break;
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}
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break;
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case self::STATE_END:
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switch ($buffer[$pos]) {
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case ' ':
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$pos++;
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break;
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case '|':
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$state = self::STATE_BEGIN;
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$pos++;
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break;
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default:
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// incorrect validation rule
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break 3;
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}
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break;
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}
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}
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if (isset($buffer[$pos])) {
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// the message can be not translated because it is an internal error
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$this->error = 'Cannot parse validation rules "'.$buffer.'" at position '.$pos.'.';
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return false;
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}
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return $rules;
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}
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/**
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* Returns the error message if validation rule is invalid.
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*
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* @return string
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*/
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public function getError() {
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return $this->error;
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}
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/**
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* fatal
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*
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* 'fatal' => true
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*/
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private function parseFatal($buffer, &$pos, &$rule) {
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if (strncmp(substr($buffer, $pos), 'fatal', 5) != 0) {
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return false;
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}
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$pos += 5;
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$rule['fatal'] = true;
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return true;
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}
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/**
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* string
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*
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* 'string' => true
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*/
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private function parseString($buffer, &$pos, &$rules) {
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if (strncmp(substr($buffer, $pos), 'string', 6) != 0) {
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return false;
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}
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$pos += 6;
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$rules['string'] = true;
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return true;
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}
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/**
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* range_time
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*
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* 'range_time' => true
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*/
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private function parseRangeTime($buffer, &$pos, &$rules) {
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if (strncmp(substr($buffer, $pos), 'range_time', 10) != 0) {
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return false;
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}
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$pos += 10;
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$rules['range_time'] = true;
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return true;
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}
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/**
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* abs_date
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*
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* 'abs_date' => true
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*/
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private function parseAbsDate($buffer, &$pos, &$rules) {
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if (strncmp(substr($buffer, $pos), 'abs_date', 8) != 0) {
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return false;
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}
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$pos += 8;
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$rules['abs_date'] = true;
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return true;
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}
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/**
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* abs_time
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*
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* 'abs_time' => true
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*/
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private function parseAbsTime($buffer, &$pos, &$rules) {
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if (strncmp(substr($buffer, $pos), 'abs_time', 8) != 0) {
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return false;
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}
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$pos += 8;
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$rules['abs_time'] = true;
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return true;
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}
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/**
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* range_time
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*
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* 'time_periods' => true
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*/
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private function parseTimePeriods($buffer, &$pos, &$rules) {
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if (strncmp(substr($buffer, $pos), 'time_periods', 12) != 0) {
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return false;
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}
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$pos += 12;
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$rules['time_periods'] = true;
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return true;
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}
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/**
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* time_unit
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*
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* 'time_unit' => ['<value1>', ..., '<valueN>']
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*/
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private function parseTimeUnit($buffer, &$pos, &$rules): bool {
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$TIME_UNIT_LENGTH = mb_strlen('time_unit');
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$TIME_UNIT_YEAR_LENGTH = mb_strlen('time_unit_year');
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$values = [];
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$ranges_string = '';
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$ranges = [];
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if (strncmp(substr($buffer, $pos), 'time_unit_year', $TIME_UNIT_YEAR_LENGTH) === 0) {
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$pos += $TIME_UNIT_YEAR_LENGTH;
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$values['with_year'] = true;
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}
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else if (strncmp(substr($buffer, $pos), 'time_unit', $TIME_UNIT_LENGTH) === 0) {
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$pos += $TIME_UNIT_LENGTH;
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}
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else {
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return false;
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}
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||
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||
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while (isset($buffer[$pos]) && $buffer[$pos] === ' ') {
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$pos++;
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}
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||
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||
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while (isset($buffer[$pos]) && $buffer[$pos] !== '|') {
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||
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$ranges_string .= $buffer[$pos];
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$pos++;
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}
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||
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||
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foreach (explode(',', $ranges_string) as $range_string) {
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if (strpos($range_string, ':') !== false) {
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[$from, $to] = explode(':', $range_string);
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||
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}
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else {
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||
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$from = $range_string;
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||
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$to = $range_string;
|
||
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}
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||
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||
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if (ctype_digit($from) && ctype_digit($to)) {
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||
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$ranges[] = ['from' => $from, 'to' => $to];
|
||
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}
|
||
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}
|
||
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||
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if ($ranges) {
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||
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$values['ranges'] = $ranges;
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||
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}
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||
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$rules['time_unit'] = $values;
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||
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|
||
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return true;
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||
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}
|
||
|
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||
|
/**
|
||
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* rgb
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||
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*
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||
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* 'rgb' => true
|
||
|
*/
|
||
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private function parseRgb($buffer, &$pos, &$rules) {
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||
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if (strncmp(substr($buffer, $pos), 'rgb', 3) != 0) {
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||
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return false;
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||
|
}
|
||
|
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||
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$pos += 3;
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||
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$rules['rgb'] = true;
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||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* required
|
||
|
*
|
||
|
* 'required' => true
|
||
|
*/
|
||
|
private function parseRequired($buffer, &$pos, &$rules) {
|
||
|
if (strncmp(substr($buffer, $pos), 'required', 8) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos += 8;
|
||
|
$rules['required'] = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* not_empty
|
||
|
*
|
||
|
* 'not_empty' => true
|
||
|
*/
|
||
|
private function parseNotEmpty($buffer, &$pos, &$rules) {
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||
|
if (strncmp(substr($buffer, $pos), 'not_empty', 9) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos += 9;
|
||
|
$rules['not_empty'] = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* le <value>
|
||
|
*
|
||
|
* 'le' => '<value>'
|
||
|
*/
|
||
|
private function parseLE($buffer, &$pos, &$rules) {
|
||
|
$i = $pos;
|
||
|
|
||
|
if (0 != strncmp(substr($buffer, $i), 'le ', 3)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$i += 3;
|
||
|
$value = '';
|
||
|
|
||
|
while (isset($buffer[$i]) && $buffer[$i] != '|') {
|
||
|
$value .= $buffer[$i++];
|
||
|
}
|
||
|
|
||
|
if (!CNewValidator::is_int32($value)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos = $i;
|
||
|
$rules['le'] = $value;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* json
|
||
|
*
|
||
|
* 'json' => true
|
||
|
*/
|
||
|
private function parseJson($buffer, &$pos, &$rules) {
|
||
|
if (strncmp(substr($buffer, $pos), 'json', 4) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos += 4;
|
||
|
$rules['json'] = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* int32
|
||
|
*
|
||
|
* 'int32' => true
|
||
|
*/
|
||
|
private function parseInt32($buffer, &$pos, &$rules) {
|
||
|
if (strncmp(substr($buffer, $pos), 'int32', 5) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos += 5;
|
||
|
$rules['int32'] = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* uint64
|
||
|
*
|
||
|
* 'uint64' => true
|
||
|
*/
|
||
|
private function parseUInt64($buffer, &$pos, &$rules) {
|
||
|
if (strncmp(substr($buffer, $pos), 'uint64', 6) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos += 6;
|
||
|
$rules['uint64'] = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* in <value1>[,...,<valueN>]
|
||
|
*
|
||
|
* 'in' => array('<value1>', ..., '<valueN>')
|
||
|
*/
|
||
|
private function parseIn($buffer, &$pos, &$rules) {
|
||
|
$i = $pos;
|
||
|
|
||
|
if (strncmp(substr($buffer, $i), 'in ', 3) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$i += 3;
|
||
|
|
||
|
while (isset($buffer[$i]) && $buffer[$i] == ' ') {
|
||
|
$i++;
|
||
|
}
|
||
|
|
||
|
$values = [];
|
||
|
|
||
|
if (!$this->parseValues($buffer, $i, $values)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos = $i;
|
||
|
$rules['in'] = $values;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* id
|
||
|
*
|
||
|
* 'id' => true
|
||
|
*/
|
||
|
private function parseId($buffer, &$pos, &$rules) {
|
||
|
if (strncmp(substr($buffer, $pos), 'id', 2) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos += 2;
|
||
|
$rules['id'] = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* ge <value>
|
||
|
*
|
||
|
* 'ge' => '<value>'
|
||
|
*/
|
||
|
private function parseGE($buffer, &$pos, &$rules) {
|
||
|
$i = $pos;
|
||
|
|
||
|
if (0 != strncmp(substr($buffer, $i), 'ge ', 3)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$i += 3;
|
||
|
$value = '';
|
||
|
|
||
|
while (isset($buffer[$i]) && $buffer[$i] != '|') {
|
||
|
$value .= $buffer[$i++];
|
||
|
}
|
||
|
|
||
|
if (!CNewValidator::is_int32($value)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos = $i;
|
||
|
$rules['ge'] = $value;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* db <table>.<field>
|
||
|
*
|
||
|
* 'db' => array(
|
||
|
* 'table' => '<table>',
|
||
|
* 'field' => '<field>'
|
||
|
* )
|
||
|
*/
|
||
|
private function parseDB($buffer, &$pos, &$rules) {
|
||
|
$i = $pos;
|
||
|
|
||
|
if (strncmp(substr($buffer, $i), 'db ', 3) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$i += 3;
|
||
|
|
||
|
while (isset($buffer[$i]) && $buffer[$i] == ' ') {
|
||
|
$i++;
|
||
|
}
|
||
|
|
||
|
$table = '';
|
||
|
|
||
|
if (!$this->parseField($buffer, $i, $table) || !isset($buffer[$i]) || $buffer[$i++] != '.') {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$field = '';
|
||
|
|
||
|
if (!$this->parseField($buffer, $i, $field)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos = $i;
|
||
|
$rules['db'] = [
|
||
|
'table' => $table,
|
||
|
'field' => $field
|
||
|
];
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* array
|
||
|
*
|
||
|
* 'array' => true
|
||
|
*/
|
||
|
private function parseArray($buffer, &$pos, &$rules) {
|
||
|
if (strncmp(substr($buffer, $pos), 'array', 5) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos += 5;
|
||
|
$rules['array'] = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* array_id
|
||
|
*
|
||
|
* 'array_id' => true
|
||
|
*/
|
||
|
private function parseArrayId($buffer, &$pos, &$rules) {
|
||
|
if (strncmp(substr($buffer, $pos), 'array_id', 8) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos += 8;
|
||
|
$rules['array_id'] = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* array_db <table>.<field>
|
||
|
*
|
||
|
* 'array_db' => array(
|
||
|
* 'table' => '<table>',
|
||
|
* 'field' => '<field>'
|
||
|
* )
|
||
|
*/
|
||
|
private function parseArrayDB($buffer, &$pos, &$rules) {
|
||
|
$i = $pos;
|
||
|
|
||
|
if (strncmp(substr($buffer, $i), 'array_db ', 9) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$i += 9;
|
||
|
|
||
|
while (isset($buffer[$i]) && $buffer[$i] == ' ') {
|
||
|
$i++;
|
||
|
}
|
||
|
|
||
|
$table = '';
|
||
|
|
||
|
if (!$this->parseField($buffer, $i, $table) || !isset($buffer[$i]) || $buffer[$i++] != '.') {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$field = '';
|
||
|
|
||
|
if (!$this->parseField($buffer, $i, $field)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos = $i;
|
||
|
$rules['array_db'] = [
|
||
|
'table' => $table,
|
||
|
'field' => $field
|
||
|
];
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* flags <value1> | <value2> | ... | <valueN>
|
||
|
*
|
||
|
* 'flags' => <value1> | <value2> | ... | <valueN>
|
||
|
*/
|
||
|
private function parseFlags($buffer, &$pos, &$rules) {
|
||
|
$i = $pos;
|
||
|
|
||
|
if (0 != strncmp(substr($buffer, $i), 'flags ', 6)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$i += 6;
|
||
|
|
||
|
$value = 0x00;
|
||
|
|
||
|
if (!$this->parseValue($buffer, $i, $value)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos = $i;
|
||
|
$rules['flags'] = $value;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* <field>
|
||
|
*/
|
||
|
private function parseField($buffer, &$pos, &$field) {
|
||
|
$matches = [];
|
||
|
if (1 != preg_match('/^[A-Za-z0-9_]+/', substr($buffer, $pos), $matches))
|
||
|
return false;
|
||
|
|
||
|
$pos += strlen($matches[0]);
|
||
|
$field = $matches[0];
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* <value1>[,...,<valueN>]
|
||
|
*/
|
||
|
private function parseValues($buffer, &$pos, array &$values) {
|
||
|
$i = $pos;
|
||
|
|
||
|
while (true) {
|
||
|
$value = '';
|
||
|
|
||
|
if (!isset($buffer[$i]) || !$this->parseValue($buffer, $i, $value)) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$values[] = $value;
|
||
|
|
||
|
if (!isset($buffer[$i]) || $buffer[$i] == ' ' || $buffer[$i] == '|') {
|
||
|
break;
|
||
|
}
|
||
|
|
||
|
$i++;
|
||
|
}
|
||
|
|
||
|
$pos = $i;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* <value>
|
||
|
*/
|
||
|
private function parseValue($buffer, &$pos, &$value) {
|
||
|
$i = $pos;
|
||
|
|
||
|
while (isset($buffer[$i]) && $buffer[$i] != ',' && $buffer[$i] != ' ' && $buffer[$i] != '|') {
|
||
|
$i++;
|
||
|
}
|
||
|
|
||
|
if ($pos == $i) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$value = substr($buffer, $pos, $i - $pos);
|
||
|
$pos = $i;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* bool
|
||
|
*
|
||
|
* 'bool' => true
|
||
|
*/
|
||
|
private function parseBool($buffer, &$pos, &$rules) {
|
||
|
if (strncmp(substr($buffer, $pos), 'bool', 4) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos += 4;
|
||
|
$rules['bool'] = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
|
||
|
/**
|
||
|
* cuid
|
||
|
*
|
||
|
* 'cuid' => true
|
||
|
*/
|
||
|
private function parseCuid($buffer, &$pos, &$rules) {
|
||
|
if (strncmp(substr($buffer, $pos), 'cuid', 4) != 0) {
|
||
|
return false;
|
||
|
}
|
||
|
|
||
|
$pos += 4;
|
||
|
$rules['cuid'] = true;
|
||
|
|
||
|
return true;
|
||
|
}
|
||
|
}
|