1 files changed, 19 insertions, 0 deletions
diff --git a/common/src/Common/Validation/SignIn.hs b/common/src/Common/Validation/SignIn.hs
new file mode 100644
index 0000000..18ceb44
--- /dev/null
+++ b/common/src/Common/Validation/SignIn.hs
@@ -0,0 +1,19 @@
+module Common.Validation.SignIn
+  ( signIn
+  , email
+  ) where
+
+import           Data.Text                (Text)
+import           Data.Validation          (Validation)
+
+import           Common.Model.Email       (Email (..))
+import           Common.Model.SignInForm  (SignInForm (..))
+import qualified Common.Validation.Atomic as Atomic
+import qualified Data.Validation          as Validation
+
+signIn :: SignInForm -> Maybe Email
+signIn (SignInForm str) =
+  Validation.validation (const Nothing) Just . email $ str
+
+email :: Text -> Validation Text Email
+email = fmap Email . Atomic.minLength 5