accounts/common/validators/UsernameValidator.php

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<?php
namespace common\validators;
use common\helpers\Error as E;
use common\helpers\StringHelper;
use common\models\Account;
use yii\base\Model;
use yii\db\QueryInterface;
use yii\validators;
use yii\validators\Validator;
class UsernameValidator extends Validator {
/**
* @var \Closure the function must return the account id for which the current validation is being performed.
* Allows you to skip the username check for the current account.
*/
public $accountCallback;
public $skipOnEmpty = false;
public function validateAttribute($model, $attribute) {
$filter = new validators\FilterValidator(['filter' => [StringHelper::class, 'trim']]);
$required = new validators\RequiredValidator();
$required->message = E::USERNAME_REQUIRED;
$length = new validators\StringValidator();
$length->min = 3;
$length->max = 21;
$length->tooShort = E::USERNAME_TOO_SHORT;
$length->tooLong = E::USERNAME_TOO_LONG;
$pattern = new validators\RegularExpressionValidator(['pattern' => '/^[\p{L}\d\-_.!$%^&*()\[\]:;]+$/u']);
$pattern->message = E::USERNAME_INVALID;
$unique = new validators\UniqueValidator();
$unique->message = E::USERNAME_NOT_AVAILABLE;
$unique->targetClass = Account::class;
$unique->targetAttribute = 'username';
if ($this->accountCallback !== null) {
$unique->filter = function(QueryInterface $query) {
$query->andWhere(['NOT', ['id' => ($this->accountCallback)()]]);
};
}
$this->executeValidation($filter, $model, $attribute) &&
$this->executeValidation($required, $model, $attribute) &&
$this->executeValidation($length, $model, $attribute) &&
$this->executeValidation($pattern, $model, $attribute) &&
$this->executeValidation($unique, $model, $attribute);
}
protected function executeValidation(Validator $validator, Model $model, string $attribute) {
$validator->validateAttribute($model, $attribute);
return !$model->hasErrors($attribute);
}
}