2 files changed, 20 insertions, 0 deletions
diff --git a/common/src/Common/Validation/Atomic.hs b/common/src/Common/Validation/Atomic.hs
index 3516668..2a356df 100644
--- a/common/src/Common/Validation/Atomic.hs
+++ b/common/src/Common/Validation/Atomic.hs
@@ -4,6 +4,7 @@ module Common.Validation.Atomic
   , number
   , nonNullNumber
   , day
+  , color
   ) where
 
 import           Data.Text          (Text)
@@ -45,3 +46,7 @@ day str =
   case Time.parseDay str of
     Just d  -> V.Success d
     Nothing -> V.Failure $ Msg.get Msg.Form_InvalidDate
+
+-- TODO: validate
+color :: Text -> Validation Text Text
+color str = V.Success str
diff --git a/common/src/Common/Validation/Category.hs b/common/src/Common/Validation/Category.hs
new file mode 100644
index 0000000..f9e6ab4
--- /dev/null
+++ b/common/src/Common/Validation/Category.hs
@@ -0,0 +1,15 @@
+module Common.Validation.Category
+  ( name
+  , color
+  ) where
+
+import           Data.Text                (Text)
+import           Data.Validation          (Validation)
+
+import qualified Common.Validation.Atomic as Atomic
+
+name :: Text -> Validation Text Text
+name = Atomic.nonEmpty
+
+color :: Text -> Validation Text Text
+color = Atomic.color