1 files changed, 38 insertions, 0 deletions
diff --git a/src/Model/Birthdate.hs b/src/Model/Birthdate.hs
new file mode 100644
index 0000000..d135419
--- /dev/null
+++ b/src/Model/Birthdate.hs
@@ -0,0 +1,38 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module Model.Birthdate
+  ( Birthdate(..)
+  , fullname
+  , age
+  , filterBirthdayAt
+  , filterBirthdayBetween
+  ) where
+
+import Data.Text (Text)
+import qualified Data.Text as T
+
+import Model.Date
+
+data Birthdate = Birthdate
+  { date :: Date
+  , firstname :: Text
+  , lastname :: Text
+  } deriving (Eq, Show)
+
+fullname :: Birthdate -> Text
+fullname d = T.concat [firstname d, " ", lastname d]
+
+age :: Date -> Birthdate -> Int
+age currentDate birthdate = yearsGap currentDate (date birthdate)
+
+filterBirthdayAt :: Date -> [Birthdate] -> [Birthdate]
+filterBirthdayAt d = filter (sameDayAndMonth d . date)
+
+filterBirthdayBetween :: Date -> Date -> [Birthdate] -> [Birthdate]
+filterBirthdayBetween begin end =
+  filter (\bd ->
+    let d = date bd
+    in  (  d `isAfterOrEqualDayAndMonth` begin
+        && d `isBeforeOrEqualDayAndMonth` end
+        )
+  )