1 files changed, 69 insertions, 0 deletions
diff --git a/src/common/View/Format.hs b/src/common/View/Format.hs
new file mode 100644
index 0000000..a7fa4e3
--- /dev/null
+++ b/src/common/View/Format.hs
@@ -0,0 +1,69 @@
+{-# LANGUAGE OverloadedStrings #-}
+
+module Common.View.Format
+  ( shortDay
+  , longDay
+  , price
+  , number
+  ) where
+
+import Data.Text (Text)
+import qualified Data.Text as T
+import Data.List (intersperse)
+import Data.Maybe (fromMaybe)
+import Data.Time.Calendar (Day, toGregorian)
+
+import qualified Common.Message as Message
+import qualified Common.Message.Key as Key
+import Common.Model.Currency (Currency(..))
+
+shortDay :: Day -> Text
+shortDay date =
+  Message.get $ Key.Date_Short
+    day
+    month
+    (fromIntegral year)
+  where (year, month, day) = toGregorian date
+
+longDay :: Day -> Text
+longDay date =
+  Message.get $ Key.Date_Long
+    day
+    (fromMaybe "−" . fmap Message.get . monthToKey $ month)
+    (fromIntegral year)
+  where (year, month, day) = toGregorian date
+
+        monthToKey 1  = Just Key.Month_January
+        monthToKey 2  = Just Key.Month_February
+        monthToKey 3  = Just Key.Month_March
+        monthToKey 4  = Just Key.Month_April
+        monthToKey 5  = Just Key.Month_May
+        monthToKey 6  = Just Key.Month_June
+        monthToKey 7  = Just Key.Month_July
+        monthToKey 8  = Just Key.Month_August
+        monthToKey 9  = Just Key.Month_September
+        monthToKey 10 = Just Key.Month_October
+        monthToKey 11 = Just Key.Month_November
+        monthToKey 12 = Just Key.Month_December
+        monthToKey _ = Nothing
+
+price :: Currency -> Int -> Text
+price (Currency currency) amount = T.concat [ number amount, " ", currency ]
+
+number :: Int -> Text
+number n =
+  T.pack
+  . (++) (if n < 0 then "-" else "")
+  . reverse
+  . concat
+  . intersperse " "
+  . group 3
+  . reverse
+  . show
+  . abs $ n
+
+group :: Int -> [a] -> [[a]]
+group n xs =
+  if length xs <= n
+    then [xs]
+    else (take n xs) : (group n (drop n xs))