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-- |
-- Module : Time.System
-- License : BSD-style
-- Maintainer : Vincent Hanquez <vincent@snarc.org>
-- Stability : experimental
-- Portability : unknown
--
-- Get the system timezone and current time value in multiple formats
--
module Time.System
(
-- * Current time in computer friendly format
timeCurrent
, timeCurrentP
-- * Current time in human friendly DateTime format
, dateCurrent
, localDateCurrent
, localDateCurrentAt
-- * System timezone
, timezoneCurrent
) where
import Control.Applicative
import Time.Types
import Data.Hourglass.Time
import Data.Hourglass.Local
import Data.Hourglass.Internal (systemGetElapsedP, systemGetElapsed, systemGetTimezone)
-- | Get the current elapsed seconds since epoch
timeCurrent :: IO Elapsed
timeCurrent = systemGetElapsed
-- | Get the current elapsed seconds (precise to the nanosecond) since epoch
timeCurrentP :: IO ElapsedP
timeCurrentP = systemGetElapsedP
-- | Get the current global date
--
-- This is equivalent to:
--
-- > timeGetDateTimeOfDay `fmap` timeCurrentP
dateCurrent :: IO DateTime
dateCurrent = timeGetDateTimeOfDay <$> timeCurrentP
-- | Get the localized date by using 'timezoneCurrent' and 'dateCurrent'
localDateCurrent :: IO (LocalTime DateTime)
localDateCurrent = localTimeSetTimezone <$> timezoneCurrent
<*> (localTimeFromGlobal <$> dateCurrent)
-- | Get the localized date at a specific timezone offset.
localDateCurrentAt :: TimezoneOffset -> IO (LocalTime DateTime)
localDateCurrentAt tz = localTimeSetTimezone tz . localTimeFromGlobal <$> dateCurrent
-- | Get the current timezone offset
--
-- This include daylight saving time when in operation.
timezoneCurrent :: IO TimezoneOffset
timezoneCurrent = systemGetTimezone
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