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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE TypeOperators #-}
module Utility.Emacs ( getEmacsOutput
, parseEmacsOutput) where
import Control.Applicative ((<$>))
import Control.Monad (foldM, when)
import qualified Control.SremConfig as SremConfig
import Data.Maybe.Read
import Data.Modular
import System.Directory (getHomeDirectory)
import System.FilePath ((</>))
import System.Process (readProcess)
import Text.Regex.Posix ((=~))
import Types.Reminder
parseEmacsOutput :: String -> [Reminder]
parseEmacsOutput = foldr step [] . drop 2 . lines
where
step line rems = maybe rems (++ rems) $ parseLine line
parseLine :: String -> Maybe [Reminder]
parseLine line = do
when (not lineMatch) $ fail ""
let hStr:mStr:s:[] = drop 1 . concat $ lineMatchStrings
h <- readMaybe hStr
m <- readMaybe mStr
staggeredReminders =<< makeReminder h m s
where
apptRegexp = " ([0-9]{1,2}):([0-9][0-9])[-]{0,1}[0-9:]{0,5}[.]* (.*)$"
snipRegexp = "[ ]{2,}:.*:*$"
lineMatch = line =~ apptRegexp :: Bool
lineMatchStrings = line =~ apptRegexp :: [[String]]
staggeredReminders :: Reminder -> Maybe [Reminder]
staggeredReminders r = sequence $ foldr step [] SremConfig.intervals
where
step minsBefore rems =
makeReminder' (h minsBefore) (m minsBefore) (getReminderText r) : rems
h m = if m > getReminderMinute r
then getReminderHour r - 1
else getReminderHour r
m m = unMod $ (toMod (getReminderMinute r) :: Int/60) - (toMod m :: Int/60)
getEmacsOutput :: IO String
getEmacsOutput = do
args <- makeEmacsArgs <$> getHomeDirectory
readProcess "emacs" args ""
makeEmacsArgs :: String -> [String]
makeEmacsArgs home = [ "-batch"
, "-l", home </> ".emacs.d" </> "init.el"
, "-eval", "(setq org-agenda-sticky nil)"
, "-eval", "(org-batch-agenda \"D\")" ]
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