luyadev/luya

<?php

namespace luya\validators;

use Yii;
use yii\validators\Validator;

/**
 * Checks a given string for given strength attributes.
 *
 * This validator is commonly used to validate the strength of passwords.
 *
 * @author Basil Suter <basil@nadar.io>
 * @since 1.0.6
 */
class StrengthValidator extends Validator
{
    /**
     * @var integer The minimum length of {attribute}.
     */
    public $length = 8;

    /**
     * @var boolean Whether special chars are required in {attribute} or not.
     */
    public $specials = true;

    /**
     * @var boolean Whether numbers are required in {attribute} or not.
     */
    public $numbers = true;

    /**
     * @var boolean Whether letters are required in {attribute} or not.
     */
    public $letters = true;

    /**
     * @var boolean Whether at least one upper char must exist in {attribute} or not.
     */
    public $uppercase = true;

    /**
     * @var boolean Whether at least one lower case char must exist in {attribute} or not.
     */
    public $lowercase = true;

    /**
     * @inheritdoc
     */
    public function validateAttribute($model, $attribute)
    {
        $value = $model->{$attribute};

        if ($this->length && strlen($value) < $this->length) {
            return $model->addError($attribute, Yii::t('luya', '{attribute} must have a minimum length of {length} characters.', ['length' => $this->length, 'attribute' => $model->getAttributeLabel($attribute)]));
        }

        if ($this->specials && !preg_match('/\W/', $value)) {
            return $model->addError($attribute, Yii::t('luya', '{attribute} must include at least one special character.', ['attribute' => $model->getAttributeLabel($attribute)]));
        }

        if ($this->numbers && !preg_match('/\d/', $value)) {
            return $model->addError($attribute, Yii::t('luya', '{attribute} must include at least one digit.', ['attribute' => $model->getAttributeLabel($attribute)]));
        }

        if ($this->letters && !preg_match('/\p{L}/', $value)) {
            return $model->addError($attribute, Yii::t('luya', '{attribute} must include at least one letter.', ['attribute' => $model->getAttributeLabel($attribute)]));
        }

        if ($this->uppercase && !preg_match('/[A-Z]/', $value)) {
            return $model->addError($attribute, Yii::t('luya', '{attribute} must include at least one uppercase letter.', ['attribute' => $model->getAttributeLabel($attribute)]));
        }

        if ($this->lowercase && !preg_match('/[a-z]/', $value)) {
            return $model->addError($attribute, Yii::t('luya', '{attribute} must include at least one lowercase letter.', ['attribute' => $model->getAttributeLabel($attribute)]));
        }
    }
}