<?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.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: CNumberValidator.php 3190 2011-04-16 23:40:21Z qiang.xue $
 * @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;
	}
}