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module Date
( Date(..)
, getCurrentDate
, sameDayAndMonth
, isBeforeOrEqualDayAndMonth
, isAfterOrEqualDayAndMonth
, yearsGap
) where
import Data.Time.Clock
import Data.Time.Calendar
import Data.Time.LocalTime
data Date = Date
{ day :: Int
, month :: Int
, year :: Int
} deriving (Eq, Show)
getCurrentDate :: IO Date
getCurrentDate = do
now <- getCurrentTime
timezone <- getCurrentTimeZone
let zoneNow = utcToLocalTime timezone now
let (y, m, d) = toGregorian $ localDay zoneNow
return $ Date d m (fromIntegral y)
sameDayAndMonth :: Date -> Date -> Bool
sameDayAndMonth d1 d2 =
( day d1 == day d2
&& month d1 == month d2
)
isBeforeOrEqualDayAndMonth :: Date -> Date -> Bool
isBeforeOrEqualDayAndMonth d1 d2 =
( month d1 < month d2
|| ( month d1 == month d2
&& day d1 <= day d2
)
)
isAfterOrEqualDayAndMonth :: Date -> Date -> Bool
isAfterOrEqualDayAndMonth d1 d2 =
( month d1 > month d2
|| ( month d1 == month d2
&& day d1 >= day d2
)
)
yearsGap :: Date -> Date -> Int
yearsGap d1 d2 = abs (year d2 - year d1)
|
