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<?php
/*
** Zabbix
** Copyright (C) 2001-2019 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** 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 General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
/**
* Class CDecimalStringValidator
*/
class CDecimalStringValidator extends CValidator {
/**
* Error message for type and decimal format validation
*
* @var string
*/
public $messageInvalid;
/**
* Returns true if the given $value is valid, or sets an error and returns false otherwise.
*
* @param $value
*
* @return bool
*/
public function validate($value) {
$isValid = false;
if (is_scalar($value)) {
$isValid = ($this->isValidCommonNotation($value)
|| $this->isValidDotNotation($value)
|| $this->isValidScientificNotation($value));
}
if (!$isValid) {
$this->error($this->messageInvalid, $this->stringify($value));
}
return $isValid;
}
/**
* Validates usual decimal syntax - "1.0", "0.11", "0".
*
* @param string $value
*
* @return boolean
*/
protected function isValidCommonNotation($value){
return preg_match('/^-?\d+(\.\d+)?$/', $value);
}
/**
* Validates "dot notation" - ".11", "22."
*
* @param string $value
*
* @return boolean
*/
protected function isValidDotNotation($value) {
return preg_match('/^-?(\.\d+|\d+\.)$/', $value);
}
/**
* Validate decimal string in scientific notation - "10e3", "1.0e-5".
*
* @param string $value
*
* @return boolean
*/
protected function isValidScientificNotation($value) {
return preg_match('/^-?[0-9]+(\.[0-9]+)?e[+|-]?[0-9]+$/i', $value);
}
}
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