feat: check malformed domain names

src/Entity/Domain.php

@@ -6,6 +6,7 @@ use ApiPlatform\Metadata\ApiProperty;
 use ApiPlatform\Metadata\ApiResource;
 use ApiPlatform\Metadata\Get;
 use App\Config\EventAction;
+use App\Exception\MalformedDomainException;
 use App\Repository\DomainRepository;
 use App\Service\RDAPService;
 use App\State\AutoRegisterDomainProvider;
@@ -177,6 +178,9 @@ class Domain
         return $this->ldhName;
     }
 
+    /**
+     * @throws MalformedDomainException
+     */
     public function setLdhName(string $ldhName): static
     {
         $this->ldhName = RDAPService::convertToIdn($ldhName);

src/Exception/MalformedDomainException.php

@@ -6,6 +6,6 @@ class MalformedDomainException extends \Exception
 {
     public static function fromDomain(string $ldhName): self
     {
-        return new self("Domain name ($ldhName) must contain at least one dot");
+        return new self("Malformed domain name ($ldhName)");
     }
 }

src/Service/RDAPService.php

@@ -197,9 +197,18 @@ class RDAPService
         return $tldEntity;
     }
 
+    /**
+     * @throws MalformedDomainException
+     */
     public static function convertToIdn(string $fqdn): string
     {
-        return strtolower(idn_to_ascii($fqdn));
+        $ascii = strtolower(idn_to_ascii($fqdn));
+
+        if (OfficialDataService::DOMAIN_DOT !== $fqdn && !preg_match('/^(xn--)?[a-z0-9-]+(\.[a-z0-9-]+)*$/', $ascii)) {
+            throw MalformedDomainException::fromDomain($fqdn);
+        }
+
+        return $ascii;
     }
 
     /**

src/State/AutoRegisterDomainProvider.php

@@ -52,7 +52,6 @@ readonly class AutoRegisterDomainProvider implements ProviderInterface
         if (null !== $domain
             && !$domain->getDeleted()
             && !$domain->isToBeUpdated(true, true)
-            && !$this->kernel->isDebug()
             && ($request && !filter_var($request->get('forced', false), FILTER_VALIDATE_BOOLEAN))
         ) {
             $this->logger->debug('It is not necessary to update the domain name', [