2 files changed, 42 insertions, 4 deletions

diff --git a/src/client/elm/Update/LoggedIn.elm b/src/client/elm/Update/LoggedIn.elm
index 74e213a..134aec2 100644
--- a/src/client/elm/Update/LoggedIn.elm
+++ b/src/client/elm/Update/LoggedIn.elm
@@ -4,9 +4,11 @@ module Update.LoggedIn
 
 import Date
 import Dict
+import Debug
+import Task
 
 import Effects exposing (Effects)
-import Task
+import Http exposing (Error(..))
 
 import Server
 
@@ -20,7 +22,7 @@ import Model.Action.AddPaymentAction as AddPayment
 import Model.View.LoggedInView exposing (..)
 import Model.View.LoggedIn.AddPayment exposing (..)
 
-import Update.LoggedIn.AddPayment exposing (updateAddPayment)
+import Update.LoggedIn.AddPayment exposing (updateAddPayment, addPaymentError)
 import Update.LoggedIn.Monthly exposing (updateMonthly)
 import Update.LoggedIn.Account exposing (updateAccount)
 
@@ -42,8 +44,16 @@ updateLoggedIn model action loggedInView =
 
     AddPayment name cost frequency ->
       ( { loggedInView | add = updateAddPayment AddPayment.WaitingServer loggedInView.add }
-      , Server.addPayment name cost frequency
-          |> flip Task.onError (always <| Task.succeed NoOp)
+      , Server.addPayment model.translations name cost frequency
+          |> flip Task.onError (\err ->
+              case err of
+                BadResponse 400 jsonErr ->
+                  case addPaymentError model.translations jsonErr of
+                    Just addPaymentAction -> Task.succeed (UpdateAdd addPaymentAction)
+                    Nothing -> Task.succeed NoOp
+                _ ->
+                  Task.succeed NoOp
+             )
           |> Effects.task
       )
 
diff --git a/src/client/elm/Update/LoggedIn/AddPayment.elm b/src/client/elm/Update/LoggedIn/AddPayment.elm
index 3eb2ea4..4c9c484 100644
--- a/src/client/elm/Update/LoggedIn/AddPayment.elm
+++ b/src/client/elm/Update/LoggedIn/AddPayment.elm
@@ -1,26 +1,54 @@
 module Update.LoggedIn.AddPayment
   ( updateAddPayment
+  , addPaymentError
   ) where
 
+import Maybe
+import Json.Decode as Json exposing ((:=))
+
 import Model.Action.AddPaymentAction exposing (..)
 import Model.View.LoggedIn.AddPayment exposing (..)
+import Model.Translations exposing (Translations, getMessage)
 import Model.Payment exposing (PaymentFrequency(..))
 
 updateAddPayment : AddPaymentAction -> AddPayment -> AddPayment
 updateAddPayment action addPayment =
   case action of
+
+    NoOp ->
+      addPayment
+
     UpdateName name ->
       { addPayment | name = name }
+
     UpdateCost cost ->
       { addPayment | cost = cost }
+
     AddError nameError costError ->
       { addPayment
       | nameError = nameError
       , costError = costError
+      , waitingServer = False
       }
+
     ToggleFrequency ->
       { addPayment
       | frequency = if addPayment.frequency == Punctual then Monthly else Punctual
       }
+
     WaitingServer ->
       { addPayment | waitingServer = True }
+
+addPaymentError : Translations -> String -> Maybe AddPaymentAction
+addPaymentError translations jsonErr =
+  let decoder =
+        Json.object2 (,)
+          (Json.maybe <| "name" := Json.string)
+          (Json.maybe <| "cost" := Json.string)
+  in  case Json.decodeString decoder jsonErr of
+        Err _ ->
+          Nothing
+        Ok (mbNameKey, mbCostKey) ->
+          Just <| AddError
+            (Maybe.map (flip getMessage translations) mbNameKey)
+            (Maybe.map (flip getMessage translations) mbCostKey)