4 files changed, 31 insertions, 2 deletions
diff --git a/common/common.cabal b/common/common.cabal
index 7eadb49..6e5c8fb 100644
--- a/common/common.cabal
+++ b/common/common.cabal
@@ -29,6 +29,7 @@ Library
     Common.Model
     Common.Msg
     Common.Util.Text
+    Common.Util.Time
     Common.View.Format
 
   other-modules:
diff --git a/common/src/Common/Model/CreatePayment.hs b/common/src/Common/Model/CreatePayment.hs
index 8e2ab73..cd0b01d 100644
--- a/common/src/Common/Model/CreatePayment.hs
+++ b/common/src/Common/Model/CreatePayment.hs
@@ -2,7 +2,7 @@ module Common.Model.CreatePayment
   ( CreatePayment(..)
   ) where
 
-import           Data.Aeson             (FromJSON)
+import           Data.Aeson             (FromJSON, ToJSON)
 import           Data.Text              (Text)
 import           Data.Time.Calendar     (Day)
 import           GHC.Generics           (Generic)
@@ -19,3 +19,4 @@ data CreatePayment = CreatePayment
   } deriving (Show, Generic)
 
 instance FromJSON CreatePayment
+instance ToJSON CreatePayment
diff --git a/common/src/Common/Model/InitResult.hs b/common/src/Common/Model/InitResult.hs
index 542e6c7..f4c08a9 100644
--- a/common/src/Common/Model/InitResult.hs
+++ b/common/src/Common/Model/InitResult.hs
@@ -10,7 +10,8 @@ import           Common.Model.Init (Init)
 
 data InitResult =
   InitSuccess Init
-  | InitEmpty (Either Text (Maybe Text))
+  | InitError Text
+  | InitEmpty
   deriving (Show, Generic)
 
 instance FromJSON InitResult
diff --git a/common/src/Common/Util/Time.hs b/common/src/Common/Util/Time.hs
new file mode 100644
index 0000000..9ab7ab5
--- /dev/null
+++ b/common/src/Common/Util/Time.hs
@@ -0,0 +1,26 @@
+module Common.Util.Time
+  ( timeToDay
+  , parseDay
+  ) where
+
+import           Data.Text           (Text)
+import qualified Data.Text           as T
+import           Data.Time           (UTCTime)
+import qualified Data.Time           as Time
+import           Data.Time.Calendar  (Day)
+import           Data.Time.LocalTime
+import qualified Text.Read           as T
+
+timeToDay :: UTCTime -> IO Day
+timeToDay time = localDay . (flip utcToLocalTime time) <$> getTimeZone time
+
+parseDay :: Text -> Maybe Day
+parseDay str = do
+  (d, m, y) <-
+    case T.splitOn str "/" of
+      [d, m, y] -> Just (d, m, y)
+      _         -> Nothing
+  d' <- T.readMaybe . T.unpack $ d
+  m' <- T.readMaybe . T.unpack $ m
+  y' <- T.readMaybe . T.unpack $ y
+  return $ Time.fromGregorian y' m' d'