Using incomes to compute a fair computation to designate the payer

1 files changed, 27 insertions, 0 deletions

diff --git a/src/server/Utils/Time.hs b/src/server/Utils/Time.hs
new file mode 100644
index 0000000..0d6ed73
--- /dev/null
+++ b/src/server/Utils/Time.hs
@@ -0,0 +1,27 @@
+module Utils.Time
+  ( belongToCurrentMonth
+  , getLocalDate
+  , Date(..)
+  ) where
+
+import Data.Time.Clock
+import Data.Time.LocalTime
+import Data.Time.Calendar
+
+belongToCurrentMonth :: UTCTime -> IO Bool
+belongToCurrentMonth time = do
+  timeMonth <- month <$> getLocalDate time
+  actualMonth <- month <$> (getCurrentTime >>= getLocalDate)
+  return (timeMonth == actualMonth)
+
+getLocalDate :: UTCTime -> IO Date
+getLocalDate time = do
+  timeZone <- getCurrentTimeZone
+  let (y, m, d) = toGregorian . localDay $ utcToLocalTime timeZone time
+  return (Date y m d)
+
+data Date = Date
+  { year :: Integer
+  , month :: Int
+  , day :: Int
+  }