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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 CDecimalValidator extends CValidator {
/**
* Max precision (optional).
*
* @var int
*/
public $maxPrecision;
/**
* Max scale (optional).
*
* @var int
*/
public $maxScale;
/**
* Error message for precision validation (optional).
*
* @var string
*/
public $messagePrecision;
/**
* Error message for natural validation (optional).
*
* @var string
*/
public $messageNatural;
/**
* Error message for scale validation (optional).
*
* @var string
*/
public $messageScale;
/**
* Error message for type and decimal format validation
*
* @var string
*/
public $messageInvalid;
/**
* Checks if the given string is correct double.
*
* @param string $value
*
* @return bool
*/
public function validate($value) {
if (!is_numeric($value) || !preg_match('/^-?\d+(\.\d+)?$/', $value)) {
$this->error($this->messageInvalid, $this->stringify($value));
return false;
}
$parts = explode('.', $value);
$beforeDot = trim($parts[0], '-');
$afterDot = isset($parts[1]) ? $parts[1] : '';
$beforeDotLength = strlen($beforeDot);
$afterDotLength = strlen($afterDot);
if ($this->maxPrecision > 0 && $this->maxScale > 0) {
// validate overall precision
if ($beforeDotLength + $afterDotLength > $this->maxPrecision) {
$this->error($this->messagePrecision, $value, $this->maxPrecision - $this->maxScale, $this->maxScale);
return false;
}
}
// digits before dot
if ($this->maxPrecision !== null && $beforeDotLength > $this->maxPrecision - $this->maxScale) {
$this->error($this->messageNatural, $value, $this->maxPrecision - $this->maxScale);
return false;
}
// digits after dot
if ($afterDotLength > $this->maxScale) {
$this->error($this->messageScale, $value, $this->maxScale);
return false;
}
return true;
}
}
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