namespace App\Security;

use Symfony\Component\Security\Http\Authenticator\Passport\Badge\UserBadge;
use Symfony\Component\String\UnicodeString;
use function Symfony\Component\String\u;

final class NormalizedUserBadge extends UserBadge
{
    public function __construct(string $identifier)
    {
        $callback = static fn (string $identifier) => u($identifier)->normalize(UnicodeString::NFKC)->ascii()->lower()->toString();
        
        parent::__construct($identifier, identifierNormalizer: $callback);
    }
}

<?php

namespace App\Security;

final class PasswordAuthenticator extends AbstractLoginFormAuthenticator
{
    // Simplified for brievety
    public function authenticate(Request $request): Passport
    {
        $username = (string) $request->request->get('username', '');
        $password = (string) $request->request->get('password', '');

        $request->getSession()
            ->set(SecurityRequestAttributes::LAST_USERNAME, $username);

        return new Passport(
            new NormalizedUserBadge($username),
            new PasswordCredentials($password),
            [
                //All other useful badges
            ]
        );
    }

        $callback = static function (string $identifier) {
            $normalized = u($identifier)->normalize(UnicodeString::NFKC)->ascii()->lower()->toString();

            $username = '';
            $domain = '';

            match (true) {
                str_contains($normalized, '@') => [
                    $localPart, $domain = explode('@', $normalized, 2),
                    $username = str_contains($localPart, '.')
                        ? substr(explode('.', $localPart, 2)[0], 0, 1) . explode('.', $localPart, 2)[1]
                        : $localPart,
                ],
                str_contains($normalized, '\\') => [
                    $domain, $username = explode('\\', $normalized, 2)
                ],
                str_contains($normalized, '://') => [
                    $parts = parse_url($normalized),
                    isset($parts['host'], $parts['path']) && [
                        $domain = $parts['host'],
                        $username = ltrim($parts['path'], '/')
                    ]
                ],
                default => $username = $normalized
            };

            $username = preg_replace('/[^a-z0-9]/', '', $username);

            return $domain . '\\' . $username;
        };