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{-# LANGUAGE OverloadedStrings #-}
import Control.Applicative ((<$>))
import Control.Monad (liftM, when)
import Control.Monad.SariulClocks
import Control.Monad.Trans (liftIO)
import Data.Classes
import Data.Function (on)
import Data.List (sortBy)
import Data.Maybe (fromJust)
import System.Directory (setCurrentDirectory)
import System.Environment (getArgs)
import Text.PrettyPrint.Boxes
import Types.Classes
import Types.Scores
import Utils.ScoresFile
--- meaty functions
weeklyCron :: ScoresList -> ScoresList
weeklyCron scores = ((resetTime . deductPoints 10) <$> take 3 sortedScores)
++ (resetTime <$> drop 3 sortedScores)
where
sortedScores = reverse $
sortBy (compare `on` (scoreTimeWasted . snd)) scores
scoreTimeWasted :: Score -> Int
scoreTimeWasted (Score _ x) = x
deductPoints :: Int -> (Class, Score) -> (Class, Score)
deductPoints n (c, Score x y) = (c, Score (x - n) y)
resetTime :: (Class, Score) -> (Class, Score)
resetTime (c, Score x _) = (c, Score x 0)
main :: IO ()
main = runSariulClocksIO $ do
liftIO $ liftM head getArgs >>= setCurrentDirectory
scores <- readScoresFile
-- Proceed only if we actually read some scores.
when (isJust scores) $ do
modifyScores weeklyCron
shouldModify <- liftM (((/=) scores) . Just) getScores
when shouldModify $ do
writeScoresFile
-- Output what we did to be e-mailed from crond.
liftM (scoresBeforeAfter (fromJust scores)) getScores
>>= printLn
--- utility functions
ppScores :: ScoresList -> String
ppScores x = render $
hsep 3 center1 [ alignHoriz center2 7 "Class"
, alignHoriz center1 7 "Points"
, alignHoriz center1 12 "Time wasted"]
// "--------------------------------"
// foldr step nullBox x
where
step b bs = classBox b // bs
classBox :: (Class, Score) -> Box
classBox (c, (Score x y)) = hsep 3 left
[ alignHoriz center1 7 $ (text . show) c
, alignHoriz center1 7 $ (text . show) x
, alignHoriz center1 12 $ (text . show) y]
scoresBeforeAfter :: ScoresList -> ScoresList -> String
scoresBeforeAfter x y = "Scores before:\n\n" ++ ppScores x ++ "\nScores after:\n\n" ++ ppScores y
isJust :: Maybe a -> Bool
isJust (Just _) = True
isJust _ = False
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