feat: Registration/Password lost: better catch 504 errors from the se…

…rver (#777)

* Better catch 504 errors from the server

* A simple character can change a lot of things ;)

lib/src/model/sign_up_status.dart

@@ -101,6 +101,7 @@ class SignUpStatus extends Status {
         SignUpStatusError.INVALID_PASSWORD,
     'The user name must contain only unaccented letters, digits and dashes.':
         SignUpStatusError.INVALID_USERNAME,
+    '504 Gateway Time-out': SignUpStatusError.SERVER_BUSY,
   };
 }
 
@@ -122,6 +123,9 @@ enum SignUpStatusError {
   /// The password is incorrect (too short)
   INVALID_PASSWORD,
 
+  /// When the server is down (504 Gateway timeout)
+  SERVER_BUSY,
+
   /// Generic error
   UNKNOWN,
 }

lib/src/open_food_api_client.dart

@@ -1224,8 +1224,11 @@ class OpenFoodAPIClient {
         body:
             'An email with a link to reset your password has been sent to the e-mail address associated with your account.',
       );
-    } else {
+    } else if (status.status is int && status.status < 500) {
       return status.copyWith(status: 400);
+    } else {
+      /// Trigger real 5xx errors
+      return status;
     }
   }