1 files changed, 12 insertions, 2 deletions
diff --git a/src/server/Json.hs b/src/server/Json.hs
index 51287ed..bd5ac3e 100644
--- a/src/server/Json.hs
+++ b/src/server/Json.hs
@@ -1,12 +1,22 @@
+{-# LANGUAGE OverloadedStrings #-}
+
 module Json
-  ( jsonObject
+  ( jsonError
+  , jsonObject
   ) where
 
-import Web.Scotty (json, ActionM)
+import Web.Scotty
+
+import Network.HTTP.Types.Status (badRequest400)
 
 import qualified Data.Aeson.Types as Json
 import qualified Data.HashMap.Strict as M
 import Data.Text (Text)
 
+jsonError :: Text -> ActionM ()
+jsonError msg = do
+  status badRequest400
+  jsonObject [("error", Json.String msg)]
+
 jsonObject :: [(Text, Json.Value)] -> ActionM ()
 jsonObject = json . Json.Object . M.fromList