1 files changed, 22 insertions, 0 deletions
diff --git a/server/src/Model/Frequency.hs b/server/src/Model/Frequency.hs
new file mode 100644
index 0000000..b334a40
--- /dev/null
+++ b/server/src/Model/Frequency.hs
@@ -0,0 +1,22 @@
+{-# LANGUAGE DeriveGeneric        #-}
+{-# LANGUAGE OverloadedStrings    #-}
+{-# LANGUAGE TemplateHaskell      #-}
+{-# OPTIONS_GHC -fno-warn-orphans #-}
+
+module Model.Frequency () where
+
+import Database.SQLite.Simple (SQLData(SQLText))
+import Database.SQLite.Simple.FromField (fieldData, FromField(fromField))
+import Database.SQLite.Simple.Ok (Ok(Ok, Errors))
+import Database.SQLite.Simple.ToField (ToField(toField))
+import qualified Data.Text as T
+
+import Common.Model (Frequency)
+
+instance FromField Frequency where
+  fromField field = case fieldData field of
+    SQLText text -> Ok (read (T.unpack text) :: Frequency)
+    _ -> Errors [error "SQLText field required for frequency"]
+
+instance ToField Frequency where
+  toField frequency = SQLText . T.pack . show $ frequency