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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
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* @license http://www.yiiframework.com/license/
*/
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namespace yii\validators;
use Yii;
use yii\helpers\Html;
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/**
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* StringValidator validates that the attribute value is of certain length.
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*
* Note, this validator should only be used with string-typed attributes.
*
* @author Qiang Xue <qiang.xue@gmail.com>
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* @since 2.0
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*/
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class StringValidator extends Validator
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{
/**
* @var integer|array specifies the length limit of the value to be validated.
* This can be specified in one of the following forms:
*
* - an integer: the exact length that the value should be of;
* - an array of one element: the minimum length that the value should be of. For example, `array(8)`.
* This will overwrite [[min]].
* - an array of two elements: the minimum and maximum lengths that the value should be of.
* For example, `array(8, 128)`. This will overwrite both [[min]] and [[max]].
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*/
public $length;
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/**
* @var integer maximum length. If not set, it means no maximum length limit.
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*/
public $max;
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/**
* @var integer minimum length. If not set, it means no minimum length limit.
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*/
public $min;
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/**
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* @var string user-defined error message used when the value is not a string
*/
public $message;
/**
* @var string user-defined error message used when the length of the value is smaller than [[min]].
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*/
public $tooShort;
/**
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* @var string user-defined error message used when the length of the value is greater than [[max]].
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*/
public $tooLong;
/**
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* @var string user-defined error message used when the length of the value is not equal to [[is]].
*/
public $notEqual;
/**
* @var string the encoding of the string value to be validated (e.g. 'UTF-8').
* If this property is not set, [[\yii\base\Application::charset]] will be used.
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*/
public $encoding;
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/**
* Initializes the validator.
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*/
public function init()
{
parent::init();
if (is_array($this->length)) {
if (isset($this->length[0])) {
$this->min = $this->length[0];
}
if (isset($this->length[1])) {
$this->max = $this->length[1];
}
$this->length = null;
}
if ($this->encoding === null) {
$this->encoding = Yii::$app->charset;
}
if ($this->message === null) {
$this->message = Yii::t('yii', '{attribute} must be a string.');
}
if ($this->min !== null && $this->tooShort === null) {
$this->tooShort = Yii::t('yii', '{attribute} should contain at least {min} characters.');
}
if ($this->max !== null && $this->tooLong === null) {
$this->tooLong = Yii::t('yii', '{attribute} should contain at most {max} characters.');
}
if ($this->length !== null && $this->notEqual === null) {
$this->notEqual = Yii::t('yii', '{attribute} should contain {length} characters.');
}
}
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/**
* Validates the attribute of the object.
* If there is any error, the error message is added to the object.
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* @param \yii\base\Model $object the object being validated
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* @param string $attribute the attribute being validated
*/
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public function validateAttribute($object, $attribute)
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{
$value = $object->$attribute;
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if (!is_string($value)) {
$this->addError($object, $attribute, $this->message);
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return;
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}
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$length = mb_strlen($value, $this->encoding);
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if ($this->min !== null && $length < $this->min) {
$this->addError($object, $attribute, $this->tooShort, array('{min}' => $this->min));
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}
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if ($this->max !== null && $length > $this->max) {
$this->addError($object, $attribute, $this->tooLong, array('{max}' => $this->max));
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}
if ($this->length !== null && $length !== $this->length) {
$this->addError($object, $attribute, $this->notEqual, array('{length}' => $this->length));
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}
}
/**
* Validates the given value.
* @param mixed $value the value to be validated.
* @return boolean whether the value is valid.
*/
public function validateValue($value)
{
if (!is_string($value)) {
return false;
}
$length = mb_strlen($value, $this->encoding);
return ($this->min === null || $length >= $this->min)
&& ($this->max === null || $length <= $this->max)
&& ($this->length === null || $length === $this->length);
}
/**
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* Returns the JavaScript needed for performing client-side validation.
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* @param \yii\base\Model $object the data object being validated
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* @param string $attribute the name of the attribute to be validated.
* @param \yii\base\View $view the view object that is going to be used to render views or view files
* containing a model form with this validator applied.
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* @return string the client-side validation script.
*/
public function clientValidateAttribute($object, $attribute, $view)
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{
$label = $object->getAttributeLabel($attribute);
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$value = $object->$attribute;
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$options = array(
'message' => Html::encode(strtr($this->message, array(
'{attribute}' => $label,
'{value}' => $value,
))),
);
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if ($this->min !== null) {
$options['min'] = $this->min;
$options['tooShort'] = Html::encode(strtr($this->tooShort, array(
'{attribute}' => $label,
'{value}' => $value,
'{min}' => $this->min,
)));
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}
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if ($this->max !== null) {
$options['max'] = $this->max;
$options['tooLong'] = Html::encode(strtr($this->tooLong, array(
'{attribute}' => $label,
'{value}' => $value,
'{max}' => $this->max,
)));
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}
if ($this->length !== null) {
$options['is'] = $this->length;
$options['notEqual'] = Html::encode(strtr($this->notEqual, array(
'{attribute}' => $label,
'{value}' => $value,
'{length}' => $this->is,
)));
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}
if ($this->skipOnEmpty) {
$options['skipOnEmpty'] = 1;
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}
ValidationAsset::register($view);
return 'yii.validation.string(value, messages, ' . json_encode($options) . ');';
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}
}