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<?php
/**
* CNumberValidator class file.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @link http://www.yiiframework.com/
* @copyright Copyright &copy; 2008-2011 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/

/**
* CNumberValidator validates that the attribute value is a number.
*
* In addition to the {@link message} property for setting a custom error message,
* CNumberValidator has a couple custom error messages you can set that correspond to different
* validation scenarios. To specify a custom message when the numeric value is too big,
* you may use the {@link tooBig} property. Similarly with {@link tooSmall}.
* The messages may contain additional placeholders that will be replaced
* with the actual content. In addition to the "{attribute}" placeholder, recognized by all
* validators (see {@link CValidator}), CNumberValidator allows for the following placeholders
* to be specified:
* <ul>
* <li>{min}: when using {@link tooSmall}, replaced with the lower limit of the number {@link min}.</li>
* <li>{max}: when using {@link tooBig}, replaced with the upper limit of the number {@link max}.</li>
* </ul>
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @version $Id$
* @package system.validators
* @since 1.0
*/
class CNumberValidator extends CValidator
{
/**
* @var boolean whether the attribute value can only be an integer. Defaults to false.
*/
public $integerOnly=false;
/**
* @var boolean whether the attribute value can be null or empty. Defaults to true,
* meaning that if the attribute is empty, it is considered valid.
*/
public $allowEmpty=true;
/**
* @var integer|float upper limit of the number. Defaults to null, meaning no upper limit.
*/
public $max;
/**
* @var integer|float lower limit of the number. Defaults to null, meaning no lower limit.
*/
public $min;
/**
* @var string user-defined error message used when the value is too big.
*/
public $tooBig;
/**
* @var string user-defined error message used when the value is too small.
*/
public $tooSmall;
/**
* @var string the regular expression for matching integers.
* @since 1.1.7
*/
public $integerPattern='/^\s*[+-]?\d+\s*$/';
/**
* @var string the regular expression for matching numbers.
* @since 1.1.7
*/
public $numberPattern='/^\s*[-+]?[0-9]*\.?[0-9]+([eE][-+]?[0-9]+)?\s*$/';


/**
* Validates the attribute of the object.
* If there is any error, the error message is added to the object.
* @param CModel $object the object being validated
* @param string $attribute the attribute being validated
*/
protected function validateAttribute($object,$attribute)
{
$value=$object->$attribute;
if($this->allowEmpty && $this->isEmpty($value))
return;
if($this->integerOnly)
{
if(!preg_match($this->integerPattern,"$value"))
{
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be an integer.');
$this->addError($object,$attribute,$message);
}
}
else
{
if(!preg_match($this->numberPattern,"$value"))
{
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} must be a number.');
$this->addError($object,$attribute,$message);
}
}
if($this->min!==null && $value<$this->min)
{
$message=$this->tooSmall!==null?$this->tooSmall:Yii::t('yii','{attribute} is too small (minimum is {min}).');
$this->addError($object,$attribute,$message,array('{min}'=>$this->min));
}
if($this->max!==null && $value>$this->max)
{
$message=$this->tooBig!==null?$this->tooBig:Yii::t('yii','{attribute} is too big (maximum is {max}).');
$this->addError($object,$attribute,$message,array('{max}'=>$this->max));
}
}

/**
* Returns the JavaScript needed for performing client-side validation.
* @param CModel $object the data object being validated
* @param string $attribute the name of the attribute to be validated.
* @return string the client-side validation script.
* @see CActiveForm::enableClientValidation
* @since 1.1.7
*/
public function clientValidateAttribute($object,$attribute)
{
$label=$object->getAttributeLabel($attribute);

if(($message=$this->message)===null)
$message=$this->integerOnly ? Yii::t('yii','{attribute} must be an integer.') : Yii::t('yii','{attribute} must be a number.');
$message=strtr($message, array(
'{attribute}'=>$label,
));

if(($tooBig=$this->tooBig)===null)
$tooBig=Yii::t('yii','{attribute} is too big (maximum is {max}).');
$tooBig=strtr($tooBig, array(
'{attribute}'=>$label,
'{max}'=>$this->max,
));

if(($tooSmall=$this->tooSmall)===null)
$tooSmall=Yii::t('yii','{attribute} is too small (minimum is {min}).');
$tooSmall=strtr($tooSmall, array(
'{attribute}'=>$label,
'{min}'=>$this->min,
));

$pattern=$this->integerOnly ? $this->integerPattern : $this->numberPattern;
$js="
if(!value.match($pattern)) {
messages.push(".CJSON::encode($message).");
}
";
if($this->min!==null)
{
$js.="
if(value<{$this->min}) {
messages.push(".CJSON::encode($tooSmall).");
}
";
}
if($this->max!==null)
{
$js.="
if(value>{$this->max}) {
messages.push(".CJSON::encode($tooBig).");
}
";
}

if($this->allowEmpty)
{
$js="
if($.trim(value)!='') {
$js
}
";
}

return $js;
}
}
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