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<?php
/**
* @link http://www.yiiframework.com/
* @copyright Copyright (c) 2008 Yii Software LLC
* @license http://www.yiiframework.com/license/
*/
namespace yii\validators;
use Yii;
use yii\base\InvalidConfigException;
use yii\helpers\Html;
/**
* CompareValidator compares the specified attribute value with another value and validates if they are equal.
*
* The value being compared with can be another attribute value
* (specified via [[compareAttribute]]) or a constant (specified via
* [[compareValue]]. When both are specified, the latter takes
* precedence. If neither is specified, the attribute will be compared
* with another attribute whose name is by appending "_repeat" to the source
* attribute name.
*
* The comparison can be either [[strict]] or not.
*
* CompareValidator supports different comparison operators, specified
* via the [[operator]] property.
*
* @author Qiang Xue <qiang.xue@gmail.com>
* @since 2.0
*/
class CompareValidator extends Validator
{
/**
* @var string the name of the attribute to be compared with. When both this property
* and [[compareValue]] are set, the latter takes precedence. If neither is set,
* it assumes the comparison is against another attribute whose name is formed by
* appending '_repeat' to the attribute being validated. For example, if 'password' is
* being validated, then the attribute to be compared would be 'password_repeat'.
* @see compareValue
*/
public $compareAttribute;
/**
* @var string the constant value to be compared with. When both this property
* and [[compareAttribute]] are set, this property takes precedence.
* @see compareAttribute
*/
public $compareValue;
/**
* @var string the operator for comparison. The following operators are supported:
*
* - '==': validates to see if the two values are equal. The comparison is done is non-strict mode.
* - '===': validates to see if the two values are equal. The comparison is done is strict mode.
* - '!=': validates to see if the two values are NOT equal. The comparison is done is non-strict mode.
* - '!==': validates to see if the two values are NOT equal. The comparison is done is strict mode.
* - `>`: validates to see if the value being validated is greater than the value being compared with.
* - `>=`: validates to see if the value being validated is greater than or equal to the value being compared with.
* - `<`: validates to see if the value being validated is less than the value being compared with.
* - `<=`: validates to see if the value being validated is less than or equal to the value being compared with.
*/
public $operator = '=';
/**
* @var string the user-defined error message. It may contain the following placeholders which
* will be replaced accordingly by the validator:
*
* - `{attribute}`: the label of the attribute being validated
* - `{value}`: the value of the attribute being validated
* - `{compareValue}`: the value or the attribute label to be compared with
*/
public $message;
/**
* Initializes the validator.
*/
public function init()
{
parent::init();
if ($this->message === null) {
switch ($this->operator) {
case '==':
$this->message = Yii::t('yii', '{attribute} must be repeated exactly.');
break;
case '===':
$this->message = Yii::t('yii', '{attribute} must be repeated exactly.');
break;
case '!=':
$this->message = Yii::t('yii', '{attribute} must not be equal to "{compareValue}".');
break;
case '!==':
$this->message = Yii::t('yii', '{attribute} must not be equal to "{compareValue}".');
break;
case '>':
$this->message = Yii::t('yii', '{attribute} must be greater than "{compareValue}".');
break;
case '>=':
$this->message = Yii::t('yii', '{attribute} must be greater than or equal to "{compareValue}".');
break;
case '<':
$this->message = Yii::t('yii', '{attribute} must be less than "{compareValue}".');
break;
case '<=':
$this->message = Yii::t('yii', '{attribute} must be less than or equal to "{compareValue}".');
break;
default:
throw new InvalidConfigException("Unknown operator: {$this->operator}");
}
}
}
/**
* Validates the attribute of the object.
* If there is any error, the error message is added to the object.
* @param \yii\base\Model $object the object being validated
* @param string $attribute the attribute being validated
* @throws InvalidConfigException if CompareValidator::operator is invalid
*/
public function validateAttribute($object, $attribute)
{
$value = $object->$attribute;
if (is_array($value)) {
$this->addError($object, $attribute, Yii::t('yii', '{attribute} is invalid.'));
return;
}
if ($this->compareValue !== null) {
$compareLabel = $compareValue = $this->compareValue;
} else {
$compareAttribute = $this->compareAttribute === null ? $attribute . '_repeat' : $this->compareAttribute;
$compareValue = $object->$compareAttribute;
$compareLabel = $object->getAttributeLabel($compareAttribute);
}
switch ($this->operator) {
case '==': $valid = $value == $compareValue; break;
case '===': $valid = $value === $compareValue; break;
case '!=': $valid = $value != $compareValue; break;
case '!==': $valid = $value !== $compareValue; break;
case '>': $valid = $value > $compareValue; break;
case '>=': $valid = $value >= $compareValue; break;
case '<': $valid = $value < $compareValue; break;
case '<=': $valid = $value <= $compareValue; break;
default: $valid = false; break;
}
if (!$valid) {
$this->addError($object, $attribute, $this->message, array(
'{compareAttribute}' => $compareLabel,
'{compareValue}' => $compareValue,
));
}
}
/**
* Validates the given value.
* @param mixed $value the value to be validated.
* @return boolean whether the value is valid.
* @throws InvalidConfigException if [[compareValue]] is not set.
*/
public function validateValue($value)
{
if ($this->compareValue === null) {
throw new InvalidConfigException('CompareValidator::compareValue must be set.');
}
switch ($this->operator) {
case '==': return $value == $this->compareValue;
case '===': return $value === $this->compareValue;
case '!=': return $value != $this->compareValue;
case '!==': return $value !== $this->compareValue;
case '>': return $value > $this->compareValue;
case '>=': return $value >= $this->compareValue;
case '<': return $value < $this->compareValue;
case '<=': return $value <= $this->compareValue;
}
}
/**
* Returns the JavaScript needed for performing client-side validation.
* @param \yii\base\Model $object the data object being validated
* @param string $attribute the name of the attribute to be validated
* @return string the client-side validation script
* @param \yii\base\View $view the view object that is going to be used to render views or view files
* containing a model form with this validator applied.
* @throws InvalidConfigException if CompareValidator::operator is invalid
*/
public function clientValidateAttribute($object, $attribute, $view)
{
$options = array('operator' => $this->operator);
if ($this->compareValue !== null) {
$options['compareValue'] = $this->compareValue;
$compareValue = $this->compareValue;
} else {
$compareAttribute = $this->compareAttribute === null ? $attribute . '_repeat' : $this->compareAttribute;
$compareValue = $object->getAttributeLabel($compareAttribute);
$options['compareAttribute'] = Html::getInputId($object, $compareAttribute);
}
if ($this->skipOnEmpty) {
$options['skipOnEmpty'] = 1;
}
$options['message'] = Html::encode(strtr($this->message, array(
'{attribute}' => $object->getAttributeLabel($attribute),
'{value}' => $object->$attribute,
'{compareValue}' => $compareValue,
)));
return 'yii.validation.compare(value, messages, ' . json_encode($options) . ');';
}
}