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|
{-# LANGUAGE DataKinds #-}
{-# LANGUAGE TypeOperators #-}
{-
srem --- Timed reminders as notifications
Copyright (C) 2015 Sean Whitton
This file is part of srem.
srem is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
srem is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with srem. If not, see <http://www.gnu.org/licenses/>.
-}
module Utility.CmdLineRem (cmdLineReminder) where
import Control.Applicative ((<$>))
import Data.List (intercalate)
import Data.List.Split (oneOf, split)
import Data.Modular
import Data.Time.Calendar
import Data.Time.Format
import Data.Time.LocalTime
import Data.Tuple.Sequence (sequenceT)
import System.Locale (defaultTimeLocale)
import Data.Maybe.Read
import Types.Reminder
import Types.Reminder.CmdLine
cmdLineReminder :: [String] -> IO (Maybe Reminder)
cmdLineReminder [] = return Nothing
cmdLineReminder [_] = return Nothing
cmdLineReminder input@(exp:_) =
case cmdLineRemType exp of
Just AbsoluteCLRem ->
return $ parseAbsoluteRem input
Just RelativeCLRem -> do
tod <- localTimeOfDay <$> zonedTimeToLocalTime <$> getZonedTime
return $ parseRelativeRem tod input
Nothing ->
return Nothing
parseRelativeRem :: TimeOfDay -> [String] -> Maybe Reminder
parseRelativeRem tod (exp:textParts) = do
(h, m) <- parseRelativeTime exp
let nowH = todHour tod
nowM = todMin tod
h' = nowH + h + ((nowM + m) `div` 60)
m' = unMod $ (toMod nowM :: Int/60) + (toMod m :: Int/60)
makeReminder h' m' text
where
text = intercalate " " textParts
parseAbsoluteRem :: [String] -> Maybe Reminder
parseAbsoluteRem (exp:textParts) = do
(h, m) <- parseAbsoluteTime exp
makeReminder h m text
where
text = intercalate " " textParts
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)
[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)
|
