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<?php
/**
* CStringValidator 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/
*/
/**
* CStringValidator validates that the attribute value is of certain length.
*
* Note, this validator should only be used with string-typed attributes.
*
* In addition to the {@link message} property for setting a custom error message,
* CStringValidator has a couple custom error messages you can set that correspond to different
* validation scenarios. For defining a custom message when the string is too short,
* you may use the {@link tooShort} property. Similarly with {@link tooLong}. The messages may contain
* placeholders that will be replaced with the actual content. In addition to the "{attribute}"
* placeholder, recognized by all validators (see {@link CValidator}), CStringValidator allows for the following
* placeholders to be specified:
* <ul>
* <li>{min}: when using {@link tooShort}, replaced with minimum length, {@link min}, if set.</li>
* <li>{max}: when using {@link tooLong}, replaced with the maximum length, {@link max}, if set.</li>
* <li>{length}: when using {@link message}, replaced with the exact required length, {@link is}, if set.</li>
* </ul>
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @package system.validators
* @since 1.0
*/
class CStringValidator extends CValidator
{
/**
* @var integer maximum length. Defaults to null, meaning no maximum limit.
*/
public $max;
/**
* @var integer minimum length. Defaults to null, meaning no minimum limit.
*/
public $min;
/**
* @var integer exact length. Defaults to null, meaning no exact length limit.
*/
public $is;
/**
* @var string user-defined error message used when the value is too short.
*/
public $tooShort;
/**
* @var string user-defined error message used when the value is too long.
*/
public $tooLong;
/**
* @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 string the encoding of the string value to be validated (e.g. 'UTF-8').
* This property is used only when mbstring PHP extension is enabled.
* The value of this property will be used as the 2nd parameter of the
* mb_strlen() function. If this property is not set, the application charset
* will be used.
* If this property is set false, then strlen() will be used even if mbstring is enabled.
* @since 1.1.1
*/
public $encoding;
/**
* 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(function_exists('mb_strlen') && $this->encoding!==false)
$length=mb_strlen($value, $this->encoding ? $this->encoding : Yii::app()->charset);
else
$length=strlen($value);
if($this->min!==null && $length<$this->min)
{
$message=$this->tooShort!==null?$this->tooShort:Yii::t('yii','{attribute} is too short (minimum is {min} characters).');
$this->addError($object,$attribute,$message,array('{min}'=>$this->min));
}
if($this->max!==null && $length>$this->max)
{
$message=$this->tooLong!==null?$this->tooLong:Yii::t('yii','{attribute} is too long (maximum is {max} characters).');
$this->addError($object,$attribute,$message,array('{max}'=>$this->max));
}
if($this->is!==null && $length!==$this->is)
{
$message=$this->message!==null?$this->message:Yii::t('yii','{attribute} is of the wrong length (should be {length} characters).');
$this->addError($object,$attribute,$message,array('{length}'=>$this->is));
}
}
/**
* 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=Yii::t('yii','{attribute} is of the wrong length (should be {length} characters).');
$message=strtr($message, array(
'{attribute}'=>$label,
'{length}'=>$this->is,
));
if(($tooShort=$this->tooShort)===null)
$tooShort=Yii::t('yii','{attribute} is too short (minimum is {min} characters).');
$tooShort=strtr($tooShort, array(
'{attribute}'=>$label,
'{min}'=>$this->min,
));
if(($tooLong=$this->tooLong)===null)
$tooLong=Yii::t('yii','{attribute} is too long (maximum is {max} characters).');
$tooLong=strtr($tooLong, array(
'{attribute}'=>$label,
'{max}'=>$this->max,
));
$js='';
if($this->min!==null)
{
$js.="
if(value.length<{$this->min}) {
messages.push(".CJSON::encode($tooShort).");
}
";
}
if($this->max!==null)
{
$js.="
if(value.length>{$this->max}) {
messages.push(".CJSON::encode($tooLong).");
}
";
}
if($this->is!==null)
{
$js.="
if(value.length!={$this->is}) {
messages.push(".CJSON::encode($message).");
}
";
}
if($this->allowEmpty)
{
$js="
if(jQuery.trim(value)!='') {
$js
}
";
}
return $js;
}
}
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