2 files changed, 39 insertions, 4 deletions
diff --git a/src/client/Model/View/Payment/Add.elm b/src/client/Model/View/Payment/Add.elm
new file mode 100644
index 0000000..ff64388
--- /dev/null
+++ b/src/client/Model/View/Payment/Add.elm
@@ -0,0 +1,36 @@
+module Model.View.Payment.Add
+  ( AddPayment
+  , initAddPayment
+  , validateName
+  , validateCost
+  ) where
+
+import Result as Result exposing (Result(..))
+
+import Utils.Validation exposing (..)
+
+type alias AddPayment =
+  { name : String
+  , nameError : Maybe String
+  , cost : String
+  , costError : Maybe String
+  }
+
+initAddPayment : AddPayment
+initAddPayment =
+  { name = ""
+  , nameError = Nothing
+  , cost = ""
+  , costError = Nothing
+  }
+
+validateName : String -> Result String String
+validateName name =
+  name
+    |> validateNonEmpty "The name is required."
+
+validateCost : String -> Result String Int
+validateCost cost =
+  cost
+    |> validateNonEmpty "The cost is required."
+    |> flip Result.andThen (validateNumber "The cost must be a number.")
diff --git a/src/client/Model/View/PaymentView.elm b/src/client/Model/View/PaymentView.elm
index 8de005d..07bd2ec 100644
--- a/src/client/Model/View/PaymentView.elm
+++ b/src/client/Model/View/PaymentView.elm
@@ -4,18 +4,17 @@ module Model.View.PaymentView
   ) where
 
 import Model.Payment exposing (Payments)
+import Model.View.Payment.Add exposing (..)
 
 type alias PaymentView =
   { userName : String
-  , name : String
-  , cost : String
+  , add : AddPayment
   , payments : Payments
   }
 
 initPaymentView : String -> Payments -> PaymentView
 initPaymentView userName payments =
   { userName = userName
-  , name = ""
-  , cost = ""
+  , add = initAddPayment
   , payments = payments
   }