accounts/common/validators/EmailValidator.php

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<?php
declare(strict_types=1);
namespace common\validators;
use common\helpers\Error as E;
use common\helpers\StringHelper;
use common\models\Account;
use Ely\Yii2\TempmailValidator;
use yii\base\Model;
use yii\db\QueryInterface;
use yii\validators;
use yii\validators\Validator;
final class EmailValidator extends Validator {
/**
* @var callable(): int the function must return the account id for which the current validation is being performed.
* Allows you to skip the email uniqueness check for the current account.
*/
public $accountCallback;
public $skipOnEmpty = false;
public function validateAttribute($model, $attribute): void {
$trim = new validators\FilterValidator(['filter' => [StringHelper::class, 'trim']]);
$required = new validators\RequiredValidator();
$required->message = E::EMAIL_REQUIRED;
$length = new validators\StringValidator();
$length->max = 255;
$length->tooLong = E::EMAIL_TOO_LONG;
$email = new validators\EmailValidator();
$email->checkDNS = true;
$email->enableIDN = true;
$email->message = E::EMAIL_INVALID;
$additionalEmail = new class extends Validator {
protected function validateValue($value): ?array {
// Disallow emails starting with slash since Postfix (or someone before?) can't correctly handle it
if (str_starts_with($value, '/')) {
return [E::EMAIL_INVALID, []];
}
return null;
}
};
$tempmail = new TempmailValidator();
$tempmail->message = E::EMAIL_IS_TEMPMAIL;
$blacklist = new class extends Validator {
public $hosts = [
'seznam.cz',
];
protected function validateValue($value): ?array {
$host = explode('@', $value)[1];
if (in_array($host, $this->hosts, true)) {
return [E::EMAIL_HOST_IS_NOT_ALLOWED, []];
}
return null;
}
};
$idnaDomain = new validators\FilterValidator(['filter' => function(string $value): string {
[$name, $domain] = explode('@', $value);
return idn_to_ascii($name) . '@' . idn_to_ascii($domain);
}]);
$unique = new validators\UniqueValidator();
$unique->message = E::EMAIL_NOT_AVAILABLE;
$unique->targetClass = Account::class;
$unique->targetAttribute = 'email';
if ($this->accountCallback !== null) {
$unique->filter = function(QueryInterface $query): void {
$query->andWhere(['NOT', ['id' => ($this->accountCallback)()]]);
};
}
$this->executeValidation($trim, $model, $attribute) &&
$this->executeValidation($required, $model, $attribute) &&
$this->executeValidation($length, $model, $attribute) &&
$this->executeValidation($email, $model, $attribute) &&
$this->executeValidation($additionalEmail, $model, $attribute) &&
$this->executeValidation($tempmail, $model, $attribute) &&
$this->executeValidation($blacklist, $model, $attribute) &&
$this->executeValidation($idnaDomain, $model, $attribute) &&
$this->executeValidation($unique, $model, $attribute);
}
private function executeValidation(Validator $validator, Model $model, string $attribute): bool {
$validator->validateAttribute($model, $attribute);
return !$model->hasErrors($attribute);
}
}