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module Utility.CmdLineRem (cmdLineReminder) where
import Types.Reminder.CmdLine
import Data.List (intercalate)
import Control.Applicative ((<$>))
import Data.Tuple.Sequence (sequenceT)
import System.Locale (defaultTimeLocale)
import Data.List.Split (oneOf, split)
import Data.Time.Calendar
import Data.Time.Format
import Data.Time.LocalTime
import Types.Reminder
import Data.Maybe.Read
cmdLineReminder :: [String] -> IO (Maybe Reminder)
cmdLineReminder [] = return Nothing
cmdLineReminder [_] = return Nothing
cmdLineReminder input@(exp:textParts) =
case cmdLineRemType exp of
Just AbsoluteCLRem ->
return $ parseAbsoluteRem input
Just RelativeCLRem -> do
tod <- localTimeOfDay <$> zonedTimeToLocalTime <$> getZonedTime
return $ parseRelativeRem tod input
Nothing ->
return Nothing
where
text = intercalate " " textParts
parseRelativeRem :: TimeOfDay -> [String] -> Maybe Reminder
parseRelativeRem = undefined
parseAbsoluteRem :: [String] -> Maybe Reminder
parseAbsoluteRem = undefined
parseRelativeTime :: String -> Maybe (Hour, Minute)
parseRelativeTime exp =
case (split . oneOf) "mh" exp of
[h, "h", m, "m", ""] -> sequenceT (readMaybe h, readMaybe m)
[h, "h", ""] -> sequenceT (readMaybe h, Just 0)
[m, "m", ""] -> sequenceT (Just 0, readMaybe m)
_ -> Nothing
parseAbsoluteTime :: String -> Maybe (Hour, Minute)
parseAbsoluteTime exp = let formatString =
if last exp == 'm'
then "%k:%M%P"
else "%k:%M"
in parseTime defaultTimeLocale formatString exp
>>= \tod -> Just (todHour tod, todMin tod)
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