auth error translatable exception message

application/Espo/Core/Api/Auth.php

@@ -30,6 +30,7 @@
 namespace Espo\Core\Api;
 
 use Espo\Core\Exceptions\BadRequest;
+use Espo\Core\Exceptions\HasBody;
 use Espo\Core\Exceptions\ServiceUnavailable;
 use Espo\Core\Exceptions\Forbidden;
 use Espo\Core\Authentication\ConfigDataProvider;
@@ -233,6 +234,10 @@ class Auth
 
             $response->setStatus($e->getCode());
 
+            if ($e->getBody()) {
+                $response->writeBody($e->getBody());
+            }
+
             $this->log->notice("Auth: " . $e->getMessage());
 
             return;

application/Espo/Core/Authentication/Authentication.php

@@ -30,6 +30,7 @@
 namespace Espo\Core\Authentication;
 
 use Espo\Core\Authentication\Logout\Params as LogoutParams;
+use Espo\Core\Exceptions\Error\Body;
 use Espo\Repositories\UserData as UserDataRepository;
 use Espo\Entities\Portal;
 use Espo\Entities\User;
@@ -223,7 +224,12 @@ class Authentication
         }
 
         if (!$user->isAdmin() && $this->configDataProvider->isMaintenanceMode()) {
-            throw new ServiceUnavailable("Application is in maintenance mode.");
+            throw ServiceUnavailable::createWithBody(
+                "Application is in maintenance mod1e.",
+                Body::create()
+                    ->withMessageTranslation('maintenanceModeError', 'messages')
+                    ->encode()
+            );
         }
 
         if (!$this->processUserCheck($user, $authLogRecord)) {

application/Espo/Core/Exceptions/ServiceUnavailable.php

@@ -29,8 +29,25 @@
 
 namespace Espo\Core\Exceptions;
 
-class ServiceUnavailable extends \Exception
+class ServiceUnavailable extends \Exception implements HasBody
 {
     /** @var int */
     protected $code = 503;
+    private ?string $body = null;
+
+    /**
+     * Create with a body (supposed to be sent to the frontend).
+     */
+    public static function createWithBody(string $message, string $body): self
+    {
+        $exception = new static($message);
+        $exception->body = $body;
+
+        return $exception;
+    }
+
+    public function getBody(): ?string
+    {
+        return $this->body;
+    }
 }

application/Espo/Resources/i18n/en_US/Global.json

@@ -357,6 +357,7 @@
         "massFollowZeroResult": "Nothing got followed",
         "massUnfollowZeroResult": "Nothing got unfollowed",
         "erasePersonalDataConfirmation": "Checked fields will be erased permanently. Are you sure?",
+        "maintenanceModeError": "The application currently is in maintenance mode.",
         "maintenanceMode": "The application currently is in maintenance mode. Only admin users have access.\n\nMaintenance mode can be disabled at Administration → Settings.",
         "resolveSaveConflict": "The record has been modified. You need to resolve the conflict before you can save the record.",
         "massPrintPdfMaxCountError": "Can't print more that {maxCount} records.",