simple alarm clock

Finally a useful program! ;)

import System.Time
import System.Environment (getArgs)
import Control.Monad (forever)
import Graphics.UI.SDL as SDL
import Graphics.UI.SDL.Mixer
 
main = do
  SDL.init [InitAudio]
  openAudio 22050 AudioS16Sys 2 4096
  h:m:_ <- fmap (map read) getArgs
  wait h m
 
wait h m = do
  now <- toCalendarTime =<< getClockTime
  if h == ctHour now && m == ctMin now
    then alarm
    else delay 5000 >> wait h m
 
alarm = do
  mus <- loadMUS "sawtooth.ogg"
  forever $ playMusic mus 1 >> delay 7000